/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/chromosome-symm.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-29289db [2021-06-05 04:31:14,034 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 04:31:14,036 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 04:31:14,061 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 04:31:14,092 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 04:31:14,126 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 04:31:14,127 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 04:31:14,127 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 04:31:14,127 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 04:31:14,129 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 04:31:14,130 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 04:31:14,130 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 04:31:14,130 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 04:31:14,130 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 04:31:14,130 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 04:31:14,131 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 04:31:14,131 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 04:31:14,131 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 04:31:14,131 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 04:31:14,131 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 04:31:14,131 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 04:31:14,131 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 04:31:14,132 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 04:31:14,132 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 04:31:14,132 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 04:31:14,132 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 04:31:14,132 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 04:31:14,132 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 04:31:14,132 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 04:31:14,132 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 04:31:14,133 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 04:31:14,133 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 04:31:14,133 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 04:31:14,133 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 04:31:14,133 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 04:31:14,133 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 04:31:14,133 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 04:31:14,427 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 04:31:14,451 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 04:31:14,453 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 04:31:14,454 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 04:31:14,455 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 04:31:14,456 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/chromosome-symm.wvr.bpl [2021-06-05 04:31:14,456 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/chromosome-symm.wvr.bpl' [2021-06-05 04:31:14,498 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 04:31:14,499 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 04:31:14,500 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 04:31:14,500 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 04:31:14,500 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 04:31:14,511 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "chromosome-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:31:14" (1/1) ... [2021-06-05 04:31:14,517 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "chromosome-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:31:14" (1/1) ... [2021-06-05 04:31:14,523 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 04:31:14,525 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 04:31:14,525 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 04:31:14,526 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 04:31:14,533 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "chromosome-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:31:14" (1/1) ... [2021-06-05 04:31:14,533 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "chromosome-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:31:14" (1/1) ... [2021-06-05 04:31:14,535 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "chromosome-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:31:14" (1/1) ... [2021-06-05 04:31:14,535 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "chromosome-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:31:14" (1/1) ... [2021-06-05 04:31:14,540 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "chromosome-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:31:14" (1/1) ... [2021-06-05 04:31:14,543 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "chromosome-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:31:14" (1/1) ... [2021-06-05 04:31:14,543 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "chromosome-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:31:14" (1/1) ... [2021-06-05 04:31:14,547 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 04:31:14,548 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 04:31:14,548 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 04:31:14,548 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 04:31:14,551 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "chromosome-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:31:14" (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 04:31:14,604 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-05 04:31:14,605 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-05 04:31:14,605 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-05 04:31:14,605 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-05 04:31:14,605 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-05 04:31:14,605 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-05 04:31:14,606 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 04:31:14,606 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 04:31:14,606 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 04:31:14,606 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 04:31:14,821 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 04:31:14,821 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-06-05 04:31:14,823 INFO L202 PluginConnector]: Adding new model chromosome-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 04:31:14 BoogieIcfgContainer [2021-06-05 04:31:14,823 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 04:31:14,824 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 04:31:14,824 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 04:31:14,827 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 04:31:14,827 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "chromosome-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:31:14" (1/2) ... [2021-06-05 04:31:14,828 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d45602a and model type chromosome-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 04:31:14, skipping insertion in model container [2021-06-05 04:31:14,828 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "chromosome-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 04:31:14" (2/2) ... [2021-06-05 04:31:14,829 INFO L111 eAbstractionObserver]: Analyzing ICFG chromosome-symm.wvr.bpl [2021-06-05 04:31:14,850 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 04:31:14,851 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 04:31:14,851 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 04:31:14,851 INFO L510 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 04:31:14,893 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-06-05 04:31:14,921 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-06-05 04:31:14,954 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 04:31:14,954 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 04:31:14,954 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 04:31:14,954 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 04:31:14,954 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 04:31:14,954 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 04:31:14,955 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 04:31:14,955 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-05 04:31:14,962 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 23 places, 18 transitions, 52 flow [2021-06-05 04:31:14,970 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 30 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:31:14,972 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:31:14,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-06-05 04:31:14,977 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:31:14,977 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:31:14,977 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:31:14,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:31:14,982 INFO L82 PathProgramCache]: Analyzing trace with hash -257954186, now seen corresponding path program 1 times [2021-06-05 04:31:14,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:31:14,998 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426630069] [2021-06-05 04:31:14,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:31:15,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:31:15,200 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 04:31:15,200 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:31:15,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426630069] [2021-06-05 04:31:15,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426630069] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:31:15,201 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:31:15,202 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 04:31:15,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422493731] [2021-06-05 04:31:15,206 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 04:31:15,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:31:15,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 04:31:15,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-05 04:31:15,222 INFO L87 Difference]: Start difference. First operand has 30 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:31:15,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:31:15,257 INFO L93 Difference]: Finished difference Result 50 states and 90 transitions. [2021-06-05 04:31:15,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 04:31:15,258 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-06-05 04:31:15,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:31:15,266 INFO L225 Difference]: With dead ends: 50 [2021-06-05 04:31:15,266 INFO L226 Difference]: Without dead ends: 45 [2021-06-05 04:31:15,270 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 39.7ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-05 04:31:15,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-06-05 04:31:15,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 30. [2021-06-05 04:31:15,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 29 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:31:15,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 56 transitions. [2021-06-05 04:31:15,306 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 56 transitions. Word has length 12 [2021-06-05 04:31:15,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:31:15,307 INFO L482 AbstractCegarLoop]: Abstraction has 30 states and 56 transitions. [2021-06-05 04:31:15,307 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:31:15,307 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 56 transitions. [2021-06-05 04:31:15,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-06-05 04:31:15,308 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:31:15,309 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:31:15,309 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 04:31:15,309 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:31:15,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:31:15,314 INFO L82 PathProgramCache]: Analyzing trace with hash 255431018, now seen corresponding path program 2 times [2021-06-05 04:31:15,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:31:15,315 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39723567] [2021-06-05 04:31:15,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:31:15,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:31:15,376 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 04:31:15,377 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:31:15,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39723567] [2021-06-05 04:31:15,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39723567] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:31:15,377 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:31:15,377 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 04:31:15,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566363425] [2021-06-05 04:31:15,378 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 04:31:15,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:31:15,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 04:31:15,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-05 04:31:15,380 INFO L87 Difference]: Start difference. First operand 30 states and 56 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:31:15,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:31:15,405 INFO L93 Difference]: Finished difference Result 48 states and 89 transitions. [2021-06-05 04:31:15,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 04:31:15,406 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-06-05 04:31:15,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:31:15,408 INFO L225 Difference]: With dead ends: 48 [2021-06-05 04:31:15,408 INFO L226 Difference]: Without dead ends: 48 [2021-06-05 04:31:15,408 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.4ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-05 04:31:15,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-06-05 04:31:15,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 33. [2021-06-05 04:31:15,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.9375) internal successors, (62), 32 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:31:15,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 62 transitions. [2021-06-05 04:31:15,423 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 62 transitions. Word has length 12 [2021-06-05 04:31:15,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:31:15,424 INFO L482 AbstractCegarLoop]: Abstraction has 33 states and 62 transitions. [2021-06-05 04:31:15,424 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:31:15,424 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 62 transitions. [2021-06-05 04:31:15,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-06-05 04:31:15,425 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:31:15,426 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:31:15,426 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-05 04:31:15,427 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:31:15,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:31:15,428 INFO L82 PathProgramCache]: Analyzing trace with hash -1890739742, now seen corresponding path program 3 times [2021-06-05 04:31:15,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:31:15,429 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130250183] [2021-06-05 04:31:15,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:31:15,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:31:15,468 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 04:31:15,469 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:31:15,469 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130250183] [2021-06-05 04:31:15,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130250183] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:31:15,470 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:31:15,470 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 04:31:15,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758059463] [2021-06-05 04:31:15,471 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 04:31:15,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:31:15,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 04:31:15,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 04:31:15,473 INFO L87 Difference]: Start difference. First operand 33 states and 62 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:31:15,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:31:15,498 INFO L93 Difference]: Finished difference Result 36 states and 68 transitions. [2021-06-05 04:31:15,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 04:31:15,499 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-06-05 04:31:15,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:31:15,500 INFO L225 Difference]: With dead ends: 36 [2021-06-05 04:31:15,500 INFO L226 Difference]: Without dead ends: 36 [2021-06-05 04:31:15,501 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.3ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 04:31:15,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-06-05 04:31:15,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2021-06-05 04:31:15,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.9375) internal successors, (62), 32 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:31:15,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 62 transitions. [2021-06-05 04:31:15,514 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 62 transitions. Word has length 12 [2021-06-05 04:31:15,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:31:15,518 INFO L482 AbstractCegarLoop]: Abstraction has 33 states and 62 transitions. [2021-06-05 04:31:15,518 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:31:15,518 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 62 transitions. [2021-06-05 04:31:15,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 04:31:15,519 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:31:15,520 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:31:15,520 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-05 04:31:15,520 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:31:15,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:31:15,521 INFO L82 PathProgramCache]: Analyzing trace with hash -309182698, now seen corresponding path program 1 times [2021-06-05 04:31:15,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:31:15,522 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528450132] [2021-06-05 04:31:15,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:31:15,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:31:15,589 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:31:15,589 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:31:15,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528450132] [2021-06-05 04:31:15,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528450132] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:31:15,590 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:31:15,590 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 04:31:15,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185712861] [2021-06-05 04:31:15,591 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 04:31:15,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:31:15,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 04:31:15,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 04:31:15,592 INFO L87 Difference]: Start difference. First operand 33 states and 62 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:31:15,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:31:15,614 INFO L93 Difference]: Finished difference Result 38 states and 72 transitions. [2021-06-05 04:31:15,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 04:31:15,614 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-05 04:31:15,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:31:15,617 INFO L225 Difference]: With dead ends: 38 [2021-06-05 04:31:15,617 INFO L226 Difference]: Without dead ends: 38 [2021-06-05 04:31:15,617 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 04:31:15,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-06-05 04:31:15,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-06-05 04:31:15,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.945945945945946) internal successors, (72), 37 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:31:15,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 72 transitions. [2021-06-05 04:31:15,625 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 72 transitions. Word has length 13 [2021-06-05 04:31:15,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:31:15,625 INFO L482 AbstractCegarLoop]: Abstraction has 38 states and 72 transitions. [2021-06-05 04:31:15,625 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:31:15,625 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 72 transitions. [2021-06-05 04:31:15,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 04:31:15,626 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:31:15,626 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:31:15,626 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-05 04:31:15,627 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:31:15,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:31:15,627 INFO L82 PathProgramCache]: Analyzing trace with hash 1319300302, now seen corresponding path program 2 times [2021-06-05 04:31:15,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:31:15,628 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697837667] [2021-06-05 04:31:15,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:31:15,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:31:15,696 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:31:15,697 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:31:15,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697837667] [2021-06-05 04:31:15,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697837667] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:31:15,697 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:31:15,697 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 04:31:15,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657415456] [2021-06-05 04:31:15,698 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 04:31:15,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:31:15,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 04:31:15,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-05 04:31:15,703 INFO L87 Difference]: Start difference. First operand 38 states and 72 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:31:15,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:31:15,724 INFO L93 Difference]: Finished difference Result 59 states and 106 transitions. [2021-06-05 04:31:15,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 04:31:15,725 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-05 04:31:15,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:31:15,727 INFO L225 Difference]: With dead ends: 59 [2021-06-05 04:31:15,727 INFO L226 Difference]: Without dead ends: 59 [2021-06-05 04:31:15,728 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.5ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-05 04:31:15,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-06-05 04:31:15,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 39. [2021-06-05 04:31:15,738 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 04:31:15,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 75 transitions. [2021-06-05 04:31:15,740 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 75 transitions. Word has length 13 [2021-06-05 04:31:15,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:31:15,740 INFO L482 AbstractCegarLoop]: Abstraction has 39 states and 75 transitions. [2021-06-05 04:31:15,740 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:31:15,740 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 75 transitions. [2021-06-05 04:31:15,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 04:31:15,741 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:31:15,741 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:31:15,741 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-05 04:31:15,741 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:31:15,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:31:15,742 INFO L82 PathProgramCache]: Analyzing trace with hash -626720332, now seen corresponding path program 3 times [2021-06-05 04:31:15,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:31:15,742 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465397728] [2021-06-05 04:31:15,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:31:15,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:31:15,780 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:31:15,781 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:31:15,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465397728] [2021-06-05 04:31:15,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465397728] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:31:15,782 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:31:15,782 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 04:31:15,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299225772] [2021-06-05 04:31:15,782 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 04:31:15,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:31:15,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 04:31:15,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-05 04:31:15,783 INFO L87 Difference]: Start difference. First operand 39 states and 75 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:31:15,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:31:15,798 INFO L93 Difference]: Finished difference Result 41 states and 76 transitions. [2021-06-05 04:31:15,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 04:31:15,798 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-05 04:31:15,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:31:15,799 INFO L225 Difference]: With dead ends: 41 [2021-06-05 04:31:15,799 INFO L226 Difference]: Without dead ends: 39 [2021-06-05 04:31:15,799 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.8ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-05 04:31:15,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-06-05 04:31:15,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2021-06-05 04:31:15,807 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 04:31:15,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 74 transitions. [2021-06-05 04:31:15,809 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 74 transitions. Word has length 13 [2021-06-05 04:31:15,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:31:15,809 INFO L482 AbstractCegarLoop]: Abstraction has 39 states and 74 transitions. [2021-06-05 04:31:15,810 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:31:15,812 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 74 transitions. [2021-06-05 04:31:15,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 04:31:15,813 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:31:15,813 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:31:15,814 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-06-05 04:31:15,814 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:31:15,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:31:15,815 INFO L82 PathProgramCache]: Analyzing trace with hash -968107418, now seen corresponding path program 1 times [2021-06-05 04:31:15,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:31:15,815 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536418397] [2021-06-05 04:31:15,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:31:15,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:31:16,118 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 04:31:16,118 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:31:16,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536418397] [2021-06-05 04:31:16,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536418397] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:31:16,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736793722] [2021-06-05 04:31:16,118 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 04:31:16,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:31:16,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:31:16,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:31:16,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 31 [2021-06-05 04:31:16,394 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:31:16,397 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 28 treesize of output 22 [2021-06-05 04:31:16,399 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:31:16,417 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:31:16,418 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 04:31:16,419 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:31:16,419 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:79, output treesize:39 [2021-06-05 04:31:16,542 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 04:31:16,542 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1736793722] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:31:16,542 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:31:16,542 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 04:31:16,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869678475] [2021-06-05 04:31:16,543 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:31:16,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:31:16,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:31:16,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:31:16,544 INFO L87 Difference]: Start difference. First operand 39 states and 74 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:31:16,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:31:16,753 INFO L93 Difference]: Finished difference Result 78 states and 144 transitions. [2021-06-05 04:31:16,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:31:16,754 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 04:31:16,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:31:16,754 INFO L225 Difference]: With dead ends: 78 [2021-06-05 04:31:16,754 INFO L226 Difference]: Without dead ends: 71 [2021-06-05 04:31:16,755 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 352.1ms TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:31:16,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-06-05 04:31:16,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 49. [2021-06-05 04:31:16,758 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 04:31:16,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 93 transitions. [2021-06-05 04:31:16,758 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 93 transitions. Word has length 14 [2021-06-05 04:31:16,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:31:16,758 INFO L482 AbstractCegarLoop]: Abstraction has 49 states and 93 transitions. [2021-06-05 04:31:16,758 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 04:31:16,758 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 93 transitions. [2021-06-05 04:31:16,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 04:31:16,759 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:31:16,759 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:31:16,985 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-06-05 04:31:16,987 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:31:16,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:31:16,987 INFO L82 PathProgramCache]: Analyzing trace with hash 2061932018, now seen corresponding path program 2 times [2021-06-05 04:31:16,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:31:16,988 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12199569] [2021-06-05 04:31:16,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:31:16,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:31:17,193 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 04:31:17,193 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:31:17,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12199569] [2021-06-05 04:31:17,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12199569] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:31:17,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635400257] [2021-06-05 04:31:17,194 INFO L93 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 04:31:17,243 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:31:17,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:31:17,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:31:17,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:31:17,543 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:31:17,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:31:17,548 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:31:17,556 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:31:17,559 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:31:17,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 04:31:17,562 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:31:17,571 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:31:17,575 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 04:31:17,575 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:32, output treesize:13 [2021-06-05 04:31:17,623 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 04:31:17,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [635400257] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:31:17,626 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:31:17,626 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 04:31:17,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004860221] [2021-06-05 04:31:17,626 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:31:17,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:31:17,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:31:17,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:31:17,627 INFO L87 Difference]: Start difference. First operand 49 states and 93 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:31:18,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:31:18,076 INFO L93 Difference]: Finished difference Result 101 states and 189 transitions. [2021-06-05 04:31:18,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:31:18,077 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 04:31:18,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:31:18,077 INFO L225 Difference]: With dead ends: 101 [2021-06-05 04:31:18,077 INFO L226 Difference]: Without dead ends: 85 [2021-06-05 04:31:18,078 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 545.8ms TimeCoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:31:18,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-06-05 04:31:18,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 51. [2021-06-05 04:31:18,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.98) internal successors, (99), 50 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:31:18,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 99 transitions. [2021-06-05 04:31:18,081 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 99 transitions. Word has length 14 [2021-06-05 04:31:18,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:31:18,081 INFO L482 AbstractCegarLoop]: Abstraction has 51 states and 99 transitions. [2021-06-05 04:31:18,081 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 04:31:18,081 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 99 transitions. [2021-06-05 04:31:18,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 04:31:18,082 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:31:18,082 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:31:18,296 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-06-05 04:31:18,297 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:31:18,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:31:18,297 INFO L82 PathProgramCache]: Analyzing trace with hash -1138943690, now seen corresponding path program 3 times [2021-06-05 04:31:18,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:31:18,297 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143314676] [2021-06-05 04:31:18,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:31:18,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:31:18,485 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 04:31:18,486 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:31:18,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143314676] [2021-06-05 04:31:18,486 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143314676] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:31:18,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497511777] [2021-06-05 04:31:18,486 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:31:18,524 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 04:31:18,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:31:18,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:31:18,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:31:18,671 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:31:18,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:31:18,673 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:31:18,680 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:31:18,683 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:31:18,683 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 13 treesize of output 9 [2021-06-05 04:31:18,685 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:31:18,692 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:31:18,693 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 04:31:18,694 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:32, output treesize:13 [2021-06-05 04:31:18,731 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 04:31:18,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [497511777] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:31:18,732 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:31:18,732 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 04:31:18,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230515727] [2021-06-05 04:31:18,732 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:31:18,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:31:18,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:31:18,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:31:18,733 INFO L87 Difference]: Start difference. First operand 51 states and 99 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:31:18,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:31:18,888 INFO L93 Difference]: Finished difference Result 69 states and 134 transitions. [2021-06-05 04:31:18,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:31:18,889 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 04:31:18,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:31:18,889 INFO L225 Difference]: With dead ends: 69 [2021-06-05 04:31:18,890 INFO L226 Difference]: Without dead ends: 62 [2021-06-05 04:31:18,890 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 258.5ms TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:31:18,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-06-05 04:31:18,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 53. [2021-06-05 04:31:18,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 2.0) internal successors, (104), 52 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:31:18,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 104 transitions. [2021-06-05 04:31:18,892 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 104 transitions. Word has length 14 [2021-06-05 04:31:18,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:31:18,893 INFO L482 AbstractCegarLoop]: Abstraction has 53 states and 104 transitions. [2021-06-05 04:31:18,893 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 04:31:18,893 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 104 transitions. [2021-06-05 04:31:18,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 04:31:18,893 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:31:18,893 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:31:19,100 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-06-05 04:31:19,101 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:31:19,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:31:19,101 INFO L82 PathProgramCache]: Analyzing trace with hash -2758418, now seen corresponding path program 4 times [2021-06-05 04:31:19,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:31:19,101 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479563945] [2021-06-05 04:31:19,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:31:19,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:31:19,268 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 04:31:19,268 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:31:19,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479563945] [2021-06-05 04:31:19,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479563945] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:31:19,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171878341] [2021-06-05 04:31:19,268 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:31:19,304 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:31:19,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:31:19,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:31:19,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:31:19,422 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:31:19,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:31:19,424 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:31:19,453 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:31:19,458 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:31:19,459 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 10 treesize of output 6 [2021-06-05 04:31:19,461 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:31:19,493 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:31:19,501 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:31:19,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:31:19,503 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:31:19,534 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:31:19,538 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:31:19,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 04:31:19,541 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:31:19,566 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:31:19,572 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:31:19,572 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:77, output treesize:35 [2021-06-05 04:31:19,659 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 04:31:19,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1171878341] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:31:19,660 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:31:19,660 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 04:31:19,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529318779] [2021-06-05 04:31:19,660 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:31:19,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:31:19,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:31:19,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:31:19,661 INFO L87 Difference]: Start difference. First operand 53 states and 104 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:31:19,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:31:19,928 INFO L93 Difference]: Finished difference Result 75 states and 146 transitions. [2021-06-05 04:31:19,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:31:19,929 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 04:31:19,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:31:19,930 INFO L225 Difference]: With dead ends: 75 [2021-06-05 04:31:19,930 INFO L226 Difference]: Without dead ends: 66 [2021-06-05 04:31:19,930 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 362.1ms TimeCoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:31:19,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-06-05 04:31:19,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 52. [2021-06-05 04:31:19,932 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 04:31:19,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 101 transitions. [2021-06-05 04:31:19,933 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 101 transitions. Word has length 14 [2021-06-05 04:31:19,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:31:19,933 INFO L482 AbstractCegarLoop]: Abstraction has 52 states and 101 transitions. [2021-06-05 04:31:19,933 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 04:31:19,933 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 101 transitions. [2021-06-05 04:31:19,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 04:31:19,934 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:31:19,934 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:31:20,156 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:31:20,157 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:31:20,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:31:20,157 INFO L82 PathProgramCache]: Analyzing trace with hash 2146038118, now seen corresponding path program 5 times [2021-06-05 04:31:20,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:31:20,157 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627361109] [2021-06-05 04:31:20,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:31:20,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:31:20,340 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 04:31:20,341 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:31:20,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627361109] [2021-06-05 04:31:20,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627361109] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:31:20,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408482174] [2021-06-05 04:31:20,341 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:31:20,369 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:31:20,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:31:20,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:31:20,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:31:20,428 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:31:20,428 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:31:20,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:31:20,432 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:31:20,437 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:31:20,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:31:20,438 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:31:20,462 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:31:20,467 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:31:20,467 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:31:20,468 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 10 treesize of output 6 [2021-06-05 04:31:20,471 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:31:20,477 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:31:20,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 04:31:20,481 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:31:20,506 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:31:20,510 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 04:31:20,510 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:35 [2021-06-05 04:31:20,593 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 04:31:20,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1408482174] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:31:20,593 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:31:20,593 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 04:31:20,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623822897] [2021-06-05 04:31:20,594 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:31:20,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:31:20,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:31:20,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:31:20,594 INFO L87 Difference]: Start difference. First operand 52 states and 101 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:31:21,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:31:21,171 INFO L93 Difference]: Finished difference Result 116 states and 214 transitions. [2021-06-05 04:31:21,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:31:21,171 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 04:31:21,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:31:21,172 INFO L225 Difference]: With dead ends: 116 [2021-06-05 04:31:21,172 INFO L226 Difference]: Without dead ends: 93 [2021-06-05 04:31:21,172 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 638.5ms TimeCoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:31:21,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-06-05 04:31:21,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 58. [2021-06-05 04:31:21,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 2.0701754385964914) internal successors, (118), 57 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:31:21,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 118 transitions. [2021-06-05 04:31:21,176 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 118 transitions. Word has length 14 [2021-06-05 04:31:21,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:31:21,176 INFO L482 AbstractCegarLoop]: Abstraction has 58 states and 118 transitions. [2021-06-05 04:31:21,176 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 04:31:21,176 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 118 transitions. [2021-06-05 04:31:21,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 04:31:21,177 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:31:21,177 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:31:21,384 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-06-05 04:31:21,385 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:31:21,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:31:21,385 INFO L82 PathProgramCache]: Analyzing trace with hash -2024741970, now seen corresponding path program 6 times [2021-06-05 04:31:21,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:31:21,385 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362302992] [2021-06-05 04:31:21,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:31:21,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:31:21,536 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 04:31:21,536 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:31:21,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362302992] [2021-06-05 04:31:21,537 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362302992] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:31:21,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121937927] [2021-06-05 04:31:21,537 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:31:21,567 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 04:31:21,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:31:21,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:31:21,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:31:21,651 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:31:21,651 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 27 treesize of output 21 [2021-06-05 04:31:21,654 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:31:21,660 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:31:21,662 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:31:21,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 04:31:21,663 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:31:21,671 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:31:21,672 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:31:21,672 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:38, output treesize:13 [2021-06-05 04:31:21,715 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 04:31:21,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2121937927] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:31:21,716 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:31:21,716 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 04:31:21,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719374944] [2021-06-05 04:31:21,716 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:31:21,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:31:21,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:31:21,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:31:21,717 INFO L87 Difference]: Start difference. First operand 58 states and 118 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:31:21,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:31:21,908 INFO L93 Difference]: Finished difference Result 78 states and 156 transitions. [2021-06-05 04:31:21,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:31:21,909 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 04:31:21,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:31:21,909 INFO L225 Difference]: With dead ends: 78 [2021-06-05 04:31:21,909 INFO L226 Difference]: Without dead ends: 71 [2021-06-05 04:31:21,910 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 237.2ms TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:31:21,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-06-05 04:31:21,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 59. [2021-06-05 04:31:21,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 2.086206896551724) internal successors, (121), 58 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:31:21,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 121 transitions. [2021-06-05 04:31:21,913 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 121 transitions. Word has length 14 [2021-06-05 04:31:21,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:31:21,913 INFO L482 AbstractCegarLoop]: Abstraction has 59 states and 121 transitions. [2021-06-05 04:31:21,913 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 04:31:21,913 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 121 transitions. [2021-06-05 04:31:21,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 04:31:21,914 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:31:21,914 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:31:22,124 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:31:22,125 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:31:22,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:31:22,125 INFO L82 PathProgramCache]: Analyzing trace with hash -888556698, now seen corresponding path program 7 times [2021-06-05 04:31:22,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:31:22,125 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398886903] [2021-06-05 04:31:22,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:31:22,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:31:22,234 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 04:31:22,234 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:31:22,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398886903] [2021-06-05 04:31:22,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398886903] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:31:22,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451523533] [2021-06-05 04:31:22,234 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:31:22,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:31:22,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:31:22,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:31:22,325 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:31:22,326 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:31:22,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:31:22,328 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:31:22,331 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:31:22,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:31:22,333 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:31:22,362 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:31:22,366 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:31:22,366 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:31:22,367 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 13 treesize of output 9 [2021-06-05 04:31:22,370 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:31:22,373 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:31:22,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 04:31:22,375 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:31:22,396 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:31:22,397 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 04:31:22,398 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:35 [2021-06-05 04:31:22,499 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 04:31:22,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [451523533] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:31:22,500 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:31:22,500 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 04:31:22,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346330939] [2021-06-05 04:31:22,500 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:31:22,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:31:22,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:31:22,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:31:22,501 INFO L87 Difference]: Start difference. First operand 59 states and 121 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:31:22,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:31:22,748 INFO L93 Difference]: Finished difference Result 84 states and 168 transitions. [2021-06-05 04:31:22,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:31:22,748 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 04:31:22,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:31:22,749 INFO L225 Difference]: With dead ends: 84 [2021-06-05 04:31:22,749 INFO L226 Difference]: Without dead ends: 75 [2021-06-05 04:31:22,749 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 301.8ms TimeCoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:31:22,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-06-05 04:31:22,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 58. [2021-06-05 04:31:22,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 2.0701754385964914) internal successors, (118), 57 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:31:22,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 118 transitions. [2021-06-05 04:31:22,752 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 118 transitions. Word has length 14 [2021-06-05 04:31:22,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:31:22,752 INFO L482 AbstractCegarLoop]: Abstraction has 58 states and 118 transitions. [2021-06-05 04:31:22,752 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 04:31:22,752 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 118 transitions. [2021-06-05 04:31:22,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 04:31:22,753 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:31:22,753 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:31:22,953 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-06-05 04:31:22,954 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:31:22,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:31:22,954 INFO L82 PathProgramCache]: Analyzing trace with hash 1260239838, now seen corresponding path program 8 times [2021-06-05 04:31:22,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:31:22,954 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364333803] [2021-06-05 04:31:22,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:31:22,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:31:23,122 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 04:31:23,123 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:31:23,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364333803] [2021-06-05 04:31:23,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364333803] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:31:23,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996162911] [2021-06-05 04:31:23,123 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:31:23,147 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:31:23,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:31:23,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:31:23,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:31:23,228 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:31:23,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:31:23,230 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:31:23,251 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:31:23,255 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:31:23,255 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 13 treesize of output 9 [2021-06-05 04:31:23,257 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:31:23,280 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:31:23,284 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:31:23,285 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 19 treesize of output 15 [2021-06-05 04:31:23,286 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:31:23,305 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:31:23,308 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:31:23,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:31:23,310 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:31:23,328 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:31:23,334 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 04:31:23,334 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:77, output treesize:35 [2021-06-05 04:31:23,448 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 04:31:23,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [996162911] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:31:23,448 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:31:23,448 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 04:31:23,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549619255] [2021-06-05 04:31:23,449 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:31:23,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:31:23,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:31:23,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:31:23,450 INFO L87 Difference]: Start difference. First operand 58 states and 118 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:31:23,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:31:23,572 INFO L93 Difference]: Finished difference Result 86 states and 167 transitions. [2021-06-05 04:31:23,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:31:23,573 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 04:31:23,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:31:23,573 INFO L225 Difference]: With dead ends: 86 [2021-06-05 04:31:23,573 INFO L226 Difference]: Without dead ends: 72 [2021-06-05 04:31:23,573 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 243.1ms TimeCoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:31:23,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-06-05 04:31:23,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 60. [2021-06-05 04:31:23,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 2.1186440677966103) internal successors, (125), 59 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:31:23,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 125 transitions. [2021-06-05 04:31:23,577 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 125 transitions. Word has length 14 [2021-06-05 04:31:23,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:31:23,578 INFO L482 AbstractCegarLoop]: Abstraction has 60 states and 125 transitions. [2021-06-05 04:31:23,578 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 04:31:23,578 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 125 transitions. [2021-06-05 04:31:23,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 04:31:23,578 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:31:23,578 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:31:23,792 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-06-05 04:31:23,793 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:31:23,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:31:23,793 INFO L82 PathProgramCache]: Analyzing trace with hash 247547306, now seen corresponding path program 9 times [2021-06-05 04:31:23,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:31:23,793 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846097575] [2021-06-05 04:31:23,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:31:23,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:31:24,003 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 04:31:24,004 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:31:24,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846097575] [2021-06-05 04:31:24,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846097575] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:31:24,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [502438196] [2021-06-05 04:31:24,004 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:31:24,044 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:31:24,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:31:24,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:31:24,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:31:24,176 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:31:24,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:31:24,179 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:31:24,201 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:31:24,204 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:31:24,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:31:24,206 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:31:24,233 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:31:24,236 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:31:24,236 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 10 treesize of output 6 [2021-06-05 04:31:24,238 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:31:24,263 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:31:24,266 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:31:24,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:31:24,268 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:31:24,288 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:31:24,290 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:31:24,290 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:77, output treesize:35 [2021-06-05 04:31:24,404 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 04:31:24,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [502438196] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:31:24,405 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:31:24,405 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 04:31:24,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844911918] [2021-06-05 04:31:24,405 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:31:24,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:31:24,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:31:24,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:31:24,406 INFO L87 Difference]: Start difference. First operand 60 states and 125 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:31:24,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:31:24,603 INFO L93 Difference]: Finished difference Result 108 states and 210 transitions. [2021-06-05 04:31:24,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:31:24,603 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 04:31:24,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:31:24,604 INFO L225 Difference]: With dead ends: 108 [2021-06-05 04:31:24,604 INFO L226 Difference]: Without dead ends: 94 [2021-06-05 04:31:24,604 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 385.5ms TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:31:24,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-06-05 04:31:24,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 63. [2021-06-05 04:31:24,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 2.1129032258064515) internal successors, (131), 62 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:31:24,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 131 transitions. [2021-06-05 04:31:24,607 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 131 transitions. Word has length 14 [2021-06-05 04:31:24,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:31:24,607 INFO L482 AbstractCegarLoop]: Abstraction has 63 states and 131 transitions. [2021-06-05 04:31:24,608 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 04:31:24,608 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 131 transitions. [2021-06-05 04:31:24,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:31:24,608 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:31:24,608 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:31:24,808 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-06-05 04:31:24,809 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:31:24,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:31:24,809 INFO L82 PathProgramCache]: Analyzing trace with hash 80062742, now seen corresponding path program 10 times [2021-06-05 04:31:24,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:31:24,809 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246118498] [2021-06-05 04:31:24,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:31:24,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:31:24,866 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 04:31:24,867 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:31:24,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246118498] [2021-06-05 04:31:24,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246118498] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:31:24,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643678265] [2021-06-05 04:31:24,867 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:31:24,891 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:31:24,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:31:24,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:31:24,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:31:24,969 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 04:31:24,969 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [643678265] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:31:24,969 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:31:24,969 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 04:31:24,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847232824] [2021-06-05 04:31:24,970 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 04:31:24,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:31:24,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 04:31:24,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-06-05 04:31:24,970 INFO L87 Difference]: Start difference. First operand 63 states and 131 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:31:25,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:31:25,186 INFO L93 Difference]: Finished difference Result 89 states and 173 transitions. [2021-06-05 04:31:25,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:31:25,187 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 04:31:25,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:31:25,187 INFO L225 Difference]: With dead ends: 89 [2021-06-05 04:31:25,187 INFO L226 Difference]: Without dead ends: 78 [2021-06-05 04:31:25,187 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 237.3ms TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:31:25,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-06-05 04:31:25,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 58. [2021-06-05 04:31:25,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 2.1228070175438596) internal successors, (121), 57 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:31:25,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 121 transitions. [2021-06-05 04:31:25,190 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 121 transitions. Word has length 15 [2021-06-05 04:31:25,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:31:25,190 INFO L482 AbstractCegarLoop]: Abstraction has 58 states and 121 transitions. [2021-06-05 04:31:25,190 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:31:25,190 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 121 transitions. [2021-06-05 04:31:25,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:31:25,190 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:31:25,190 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:31:25,408 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:31:25,409 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:31:25,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:31:25,409 INFO L82 PathProgramCache]: Analyzing trace with hash 1340900102, now seen corresponding path program 11 times [2021-06-05 04:31:25,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:31:25,409 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630168928] [2021-06-05 04:31:25,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:31:25,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:31:25,469 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:31:25,469 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:31:25,469 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630168928] [2021-06-05 04:31:25,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630168928] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:31:25,469 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162019056] [2021-06-05 04:31:25,470 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:31:25,493 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:31:25,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:31:25,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:31:25,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:31:25,542 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 04:31:25,542 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [162019056] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:31:25,542 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:31:25,542 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-06-05 04:31:25,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656571334] [2021-06-05 04:31:25,543 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 04:31:25,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:31:25,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 04:31:25,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-05 04:31:25,543 INFO L87 Difference]: Start difference. First operand 58 states and 121 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:31:25,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:31:25,603 INFO L93 Difference]: Finished difference Result 86 states and 172 transitions. [2021-06-05 04:31:25,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:31:25,603 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 04:31:25,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:31:25,604 INFO L225 Difference]: With dead ends: 86 [2021-06-05 04:31:25,604 INFO L226 Difference]: Without dead ends: 86 [2021-06-05 04:31:25,604 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 50.9ms TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-06-05 04:31:25,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-06-05 04:31:25,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 59. [2021-06-05 04:31:25,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 2.1379310344827585) internal successors, (124), 58 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:31:25,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 124 transitions. [2021-06-05 04:31:25,608 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 124 transitions. Word has length 15 [2021-06-05 04:31:25,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:31:25,608 INFO L482 AbstractCegarLoop]: Abstraction has 59 states and 124 transitions. [2021-06-05 04:31:25,608 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:31:25,608 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 124 transitions. [2021-06-05 04:31:25,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:31:25,608 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:31:25,608 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:31:25,826 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-06-05 04:31:25,827 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:31:25,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:31:25,827 INFO L82 PathProgramCache]: Analyzing trace with hash -477995254, now seen corresponding path program 12 times [2021-06-05 04:31:25,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:31:25,827 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783531463] [2021-06-05 04:31:25,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:31:25,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:31:25,914 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 04:31:25,914 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:31:25,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783531463] [2021-06-05 04:31:25,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783531463] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:31:25,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806556615] [2021-06-05 04:31:25,914 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:31:25,952 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 04:31:25,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:31:25,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:31:25,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:31:26,093 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 04:31:26,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [806556615] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:31:26,093 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:31:26,094 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 04:31:26,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103489356] [2021-06-05 04:31:26,094 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:31:26,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:31:26,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:31:26,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:31:26,095 INFO L87 Difference]: Start difference. First operand 59 states and 124 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:31:26,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:31:26,364 INFO L93 Difference]: Finished difference Result 89 states and 174 transitions. [2021-06-05 04:31:26,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:31:26,365 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 04:31:26,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:31:26,365 INFO L225 Difference]: With dead ends: 89 [2021-06-05 04:31:26,365 INFO L226 Difference]: Without dead ends: 83 [2021-06-05 04:31:26,365 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 320.6ms TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:31:26,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-06-05 04:31:26,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 60. [2021-06-05 04:31:26,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 2.135593220338983) internal successors, (126), 59 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:31:26,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 126 transitions. [2021-06-05 04:31:26,368 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 126 transitions. Word has length 15 [2021-06-05 04:31:26,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:31:26,368 INFO L482 AbstractCegarLoop]: Abstraction has 60 states and 126 transitions. [2021-06-05 04:31:26,368 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:31:26,368 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 126 transitions. [2021-06-05 04:31:26,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:31:26,368 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:31:26,369 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:31:26,572 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-06-05 04:31:26,573 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:31:26,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:31:26,574 INFO L82 PathProgramCache]: Analyzing trace with hash 1170063830, now seen corresponding path program 13 times [2021-06-05 04:31:26,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:31:26,574 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850511115] [2021-06-05 04:31:26,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:31:26,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:31:26,632 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:31:26,633 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:31:26,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850511115] [2021-06-05 04:31:26,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850511115] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:31:26,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143408912] [2021-06-05 04:31:26,633 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:31:26,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:31:26,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:31:26,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:31:26,798 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 04:31:26,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2143408912] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:31:26,799 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:31:26,799 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 04:31:26,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377379375] [2021-06-05 04:31:26,799 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:31:26,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:31:26,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:31:26,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:31:26,800 INFO L87 Difference]: Start difference. First operand 60 states and 126 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:31:26,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:31:26,911 INFO L93 Difference]: Finished difference Result 99 states and 198 transitions. [2021-06-05 04:31:26,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:31:26,912 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 04:31:26,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:31:26,913 INFO L225 Difference]: With dead ends: 99 [2021-06-05 04:31:26,913 INFO L226 Difference]: Without dead ends: 99 [2021-06-05 04:31:26,913 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 127.3ms TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:31:26,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-06-05 04:31:26,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 60. [2021-06-05 04:31:26,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 2.135593220338983) internal successors, (126), 59 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:31:26,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 126 transitions. [2021-06-05 04:31:26,915 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 126 transitions. Word has length 15 [2021-06-05 04:31:26,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:31:26,916 INFO L482 AbstractCegarLoop]: Abstraction has 60 states and 126 transitions. [2021-06-05 04:31:26,916 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 04:31:26,916 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 126 transitions. [2021-06-05 04:31:26,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:31:26,916 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:31:26,916 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:31:27,136 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-06-05 04:31:27,136 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:31:27,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:31:27,136 INFO L82 PathProgramCache]: Analyzing trace with hash 384009810, now seen corresponding path program 14 times [2021-06-05 04:31:27,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:31:27,136 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758538773] [2021-06-05 04:31:27,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:31:27,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:31:27,203 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 04:31:27,203 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:31:27,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758538773] [2021-06-05 04:31:27,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758538773] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:31:27,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579460723] [2021-06-05 04:31:27,203 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:31:27,238 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:31:27,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:31:27,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:31:27,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:31:27,373 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:31:27,374 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:31:27,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:31:27,376 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:31:27,378 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:31:27,379 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 04:31:27,380 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:31:27,420 INFO L628 ElimStorePlain]: treesize reduction 60, result has 38.8 percent of original size [2021-06-05 04:31:27,420 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 04:31:27,423 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 7 treesize of output 5 [2021-06-05 04:31:27,424 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:31:27,437 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:31:27,437 INFO L518 ElimStorePlain]: Eliminatee v_prenex_15 vanished before elimination [2021-06-05 04:31:27,438 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 04:31:27,438 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-06-05 04:31:27,464 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 04:31:27,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [579460723] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:31:27,465 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:31:27,465 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 04:31:27,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139904090] [2021-06-05 04:31:27,465 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:31:27,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:31:27,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:31:27,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:31:27,465 INFO L87 Difference]: Start difference. First operand 60 states and 126 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:31:27,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:31:27,959 INFO L93 Difference]: Finished difference Result 102 states and 195 transitions. [2021-06-05 04:31:27,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:31:27,959 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 04:31:27,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:31:27,960 INFO L225 Difference]: With dead ends: 102 [2021-06-05 04:31:27,960 INFO L226 Difference]: Without dead ends: 99 [2021-06-05 04:31:27,960 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 507.4ms TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:31:27,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-06-05 04:31:27,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 65. [2021-06-05 04:31:27,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 2.140625) internal successors, (137), 64 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:31:27,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 137 transitions. [2021-06-05 04:31:27,963 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 137 transitions. Word has length 15 [2021-06-05 04:31:27,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:31:27,963 INFO L482 AbstractCegarLoop]: Abstraction has 65 states and 137 transitions. [2021-06-05 04:31:27,964 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:31:27,964 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 137 transitions. [2021-06-05 04:31:27,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:31:27,964 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:31:27,964 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:31:28,172 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:31:28,173 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:31:28,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:31:28,173 INFO L82 PathProgramCache]: Analyzing trace with hash 160078342, now seen corresponding path program 15 times [2021-06-05 04:31:28,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:31:28,173 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379453332] [2021-06-05 04:31:28,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:31:28,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:31:28,236 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:31:28,237 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:31:28,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379453332] [2021-06-05 04:31:28,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379453332] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:31:28,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61979856] [2021-06-05 04:31:28,237 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:31:28,269 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 04:31:28,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:31:28,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:31:28,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:31:28,375 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:31:28,375 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:31:28,376 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 18 treesize of output 14 [2021-06-05 04:31:28,377 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:31:28,380 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:31:28,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 04:31:28,381 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:31:28,442 INFO L628 ElimStorePlain]: treesize reduction 80, result has 35.0 percent of original size [2021-06-05 04:31:28,442 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 04:31:28,445 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 9 treesize of output 7 [2021-06-05 04:31:28,447 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:31:28,468 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:31:28,468 INFO L518 ElimStorePlain]: Eliminatee v_prenex_17 vanished before elimination [2021-06-05 04:31:28,470 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 04:31:28,471 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:133, output treesize:22 [2021-06-05 04:31:28,520 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 04:31:28,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [61979856] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:31:28,521 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:31:28,521 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 04:31:28,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83692557] [2021-06-05 04:31:28,523 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:31:28,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:31:28,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:31:28,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:31:28,523 INFO L87 Difference]: Start difference. First operand 65 states and 137 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:31:28,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:31:28,671 INFO L93 Difference]: Finished difference Result 100 states and 201 transitions. [2021-06-05 04:31:28,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:31:28,672 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 04:31:28,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:31:28,672 INFO L225 Difference]: With dead ends: 100 [2021-06-05 04:31:28,672 INFO L226 Difference]: Without dead ends: 100 [2021-06-05 04:31:28,673 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 193.1ms TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:31:28,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-06-05 04:31:28,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 65. [2021-06-05 04:31:28,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 2.140625) internal successors, (137), 64 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:31:28,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 137 transitions. [2021-06-05 04:31:28,675 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 137 transitions. Word has length 15 [2021-06-05 04:31:28,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:31:28,675 INFO L482 AbstractCegarLoop]: Abstraction has 65 states and 137 transitions. [2021-06-05 04:31:28,675 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 04:31:28,675 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 137 transitions. [2021-06-05 04:31:28,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:31:28,676 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:31:28,676 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:31:28,880 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-06-05 04:31:28,881 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:31:28,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:31:28,881 INFO L82 PathProgramCache]: Analyzing trace with hash 1520195082, now seen corresponding path program 16 times [2021-06-05 04:31:28,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:31:28,881 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721106468] [2021-06-05 04:31:28,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:31:28,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:31:28,971 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 04:31:28,972 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:31:28,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721106468] [2021-06-05 04:31:28,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721106468] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:31:28,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305955133] [2021-06-05 04:31:28,972 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:31:29,012 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:31:29,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:31:29,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:31:29,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:31:29,139 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:31:29,140 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:31:29,141 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 17 treesize of output 13 [2021-06-05 04:31:29,142 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:31:29,145 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:31:29,145 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 16 treesize of output 12 [2021-06-05 04:31:29,146 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:31:29,194 INFO L628 ElimStorePlain]: treesize reduction 60, result has 38.8 percent of original size [2021-06-05 04:31:29,194 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 04:31:29,197 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 7 treesize of output 5 [2021-06-05 04:31:29,198 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:31:29,216 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:31:29,216 INFO L518 ElimStorePlain]: Eliminatee v_prenex_20 vanished before elimination [2021-06-05 04:31:29,217 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 04:31:29,218 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-06-05 04:31:29,249 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 04:31:29,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1305955133] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:31:29,249 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:31:29,249 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 04:31:29,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609837999] [2021-06-05 04:31:29,250 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:31:29,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:31:29,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:31:29,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:31:29,250 INFO L87 Difference]: Start difference. First operand 65 states and 137 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:31:29,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:31:29,513 INFO L93 Difference]: Finished difference Result 87 states and 174 transitions. [2021-06-05 04:31:29,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:31:29,513 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 04:31:29,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:31:29,514 INFO L225 Difference]: With dead ends: 87 [2021-06-05 04:31:29,514 INFO L226 Difference]: Without dead ends: 87 [2021-06-05 04:31:29,514 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 312.7ms TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:31:29,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-06-05 04:31:29,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 61. [2021-06-05 04:31:29,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 2.1333333333333333) internal successors, (128), 60 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:31:29,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 128 transitions. [2021-06-05 04:31:29,516 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 128 transitions. Word has length 15 [2021-06-05 04:31:29,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:31:29,516 INFO L482 AbstractCegarLoop]: Abstraction has 61 states and 128 transitions. [2021-06-05 04:31:29,516 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:31:29,516 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 128 transitions. [2021-06-05 04:31:29,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:31:29,516 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:31:29,516 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:31:29,720 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:31:29,721 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:31:29,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:31:29,721 INFO L82 PathProgramCache]: Analyzing trace with hash -920894394, now seen corresponding path program 17 times [2021-06-05 04:31:29,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:31:29,721 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603774258] [2021-06-05 04:31:29,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:31:29,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:31:29,793 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 04:31:29,793 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:31:29,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603774258] [2021-06-05 04:31:29,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603774258] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:31:29,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [686787360] [2021-06-05 04:31:29,793 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 04:31:29,825 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:31:29,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:31:29,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:31:29,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:31:29,944 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 04:31:29,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [686787360] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:31:29,944 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:31:29,944 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 04:31:29,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764762505] [2021-06-05 04:31:29,945 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:31:29,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:31:29,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:31:29,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:31:29,946 INFO L87 Difference]: Start difference. First operand 61 states and 128 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:31:30,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:31:30,128 INFO L93 Difference]: Finished difference Result 71 states and 144 transitions. [2021-06-05 04:31:30,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:31:30,129 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 04:31:30,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:31:30,129 INFO L225 Difference]: With dead ends: 71 [2021-06-05 04:31:30,129 INFO L226 Difference]: Without dead ends: 65 [2021-06-05 04:31:30,130 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 216.2ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:31:30,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-06-05 04:31:30,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 62. [2021-06-05 04:31:30,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 2.1311475409836067) internal successors, (130), 61 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:31:30,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 130 transitions. [2021-06-05 04:31:30,131 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 130 transitions. Word has length 15 [2021-06-05 04:31:30,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:31:30,132 INFO L482 AbstractCegarLoop]: Abstraction has 62 states and 130 transitions. [2021-06-05 04:31:30,132 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:31:30,132 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 130 transitions. [2021-06-05 04:31:30,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:31:30,132 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:31:30,132 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:31:30,340 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-06-05 04:31:30,341 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:31:30,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:31:30,341 INFO L82 PathProgramCache]: Analyzing trace with hash 727164690, now seen corresponding path program 18 times [2021-06-05 04:31:30,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:31:30,341 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863510227] [2021-06-05 04:31:30,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:31:30,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:31:30,401 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:31:30,401 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:31:30,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863510227] [2021-06-05 04:31:30,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863510227] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:31:30,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122667613] [2021-06-05 04:31:30,401 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 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 04:31:30,425 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 04:31:30,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:31:30,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:31:30,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:31:30,530 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:31:30,531 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:31:30,531 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 17 treesize of output 13 [2021-06-05 04:31:30,532 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:31:30,534 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:31:30,535 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 17 treesize of output 13 [2021-06-05 04:31:30,536 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:31:30,552 INFO L628 ElimStorePlain]: treesize reduction 36, result has 29.4 percent of original size [2021-06-05 04:31:30,552 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 04:31:30,553 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 04:31:30,553 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:63, output treesize:9 [2021-06-05 04:31:30,565 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 04:31:30,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2122667613] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:31:30,566 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:31:30,566 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 04:31:30,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676781718] [2021-06-05 04:31:30,566 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:31:30,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:31:30,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:31:30,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:31:30,566 INFO L87 Difference]: Start difference. First operand 62 states and 130 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:31:30,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:31:30,602 INFO L93 Difference]: Finished difference Result 73 states and 152 transitions. [2021-06-05 04:31:30,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:31:30,602 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 04:31:30,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:31:30,603 INFO L225 Difference]: With dead ends: 73 [2021-06-05 04:31:30,603 INFO L226 Difference]: Without dead ends: 73 [2021-06-05 04:31:30,603 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 79.9ms TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:31:30,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-06-05 04:31:30,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 62. [2021-06-05 04:31:30,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 2.1311475409836067) internal successors, (130), 61 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:31:30,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 130 transitions. [2021-06-05 04:31:30,605 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 130 transitions. Word has length 15 [2021-06-05 04:31:30,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:31:30,605 INFO L482 AbstractCegarLoop]: Abstraction has 62 states and 130 transitions. [2021-06-05 04:31:30,605 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 04:31:30,605 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 130 transitions. [2021-06-05 04:31:30,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:31:30,606 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:31:30,606 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:31:30,824 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable83 [2021-06-05 04:31:30,825 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:31:30,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:31:30,825 INFO L82 PathProgramCache]: Analyzing trace with hash -58889330, now seen corresponding path program 19 times [2021-06-05 04:31:30,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:31:30,825 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452718687] [2021-06-05 04:31:30,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:31:30,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:31:30,887 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 04:31:30,887 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:31:30,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452718687] [2021-06-05 04:31:30,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452718687] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:31:30,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634560469] [2021-06-05 04:31:30,888 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 04:31:30,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:31:30,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:31:30,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:31:31,013 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:31:31,014 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:31:31,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:31:31,015 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:31:31,018 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:31:31,018 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 17 treesize of output 13 [2021-06-05 04:31:31,019 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:31:31,062 INFO L628 ElimStorePlain]: treesize reduction 60, result has 38.8 percent of original size [2021-06-05 04:31:31,063 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 04:31:31,065 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 7 treesize of output 5 [2021-06-05 04:31:31,065 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:31:31,078 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:31:31,078 INFO L518 ElimStorePlain]: Eliminatee v_prenex_22 vanished before elimination [2021-06-05 04:31:31,079 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:31:31,079 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-06-05 04:31:31,112 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 04:31:31,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [634560469] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:31:31,113 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:31:31,113 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 04:31:31,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282830050] [2021-06-05 04:31:31,113 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:31:31,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:31:31,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:31:31,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:31:31,114 INFO L87 Difference]: Start difference. First operand 62 states and 130 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:31:31,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:31:31,300 INFO L93 Difference]: Finished difference Result 84 states and 165 transitions. [2021-06-05 04:31:31,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:31:31,300 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 04:31:31,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:31:31,301 INFO L225 Difference]: With dead ends: 84 [2021-06-05 04:31:31,301 INFO L226 Difference]: Without dead ends: 81 [2021-06-05 04:31:31,301 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 206.4ms TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:31:31,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-06-05 04:31:31,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 67. [2021-06-05 04:31:31,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 2.1363636363636362) internal successors, (141), 66 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:31:31,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 141 transitions. [2021-06-05 04:31:31,303 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 141 transitions. Word has length 15 [2021-06-05 04:31:31,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:31:31,303 INFO L482 AbstractCegarLoop]: Abstraction has 67 states and 141 transitions. [2021-06-05 04:31:31,303 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:31:31,304 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 141 transitions. [2021-06-05 04:31:31,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:31:31,304 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:31:31,304 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:31:31,512 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:31:31,513 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:31:31,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:31:31,513 INFO L82 PathProgramCache]: Analyzing trace with hash -282820798, now seen corresponding path program 20 times [2021-06-05 04:31:31,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:31:31,513 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667031803] [2021-06-05 04:31:31,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:31:31,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:31:31,579 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:31:31,580 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:31:31,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667031803] [2021-06-05 04:31:31,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667031803] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:31:31,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655818487] [2021-06-05 04:31:31,580 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:31:31,629 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:31:31,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:31:31,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:31:31,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:31:31,718 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:31:31,719 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:31:31,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:31:31,720 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:31:31,723 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:31:31,723 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 17 treesize of output 13 [2021-06-05 04:31:31,724 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:31:31,779 INFO L628 ElimStorePlain]: treesize reduction 78, result has 35.5 percent of original size [2021-06-05 04:31:31,780 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 04:31:31,783 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 9 treesize of output 7 [2021-06-05 04:31:31,784 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:31:31,806 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:31:31,806 INFO L518 ElimStorePlain]: Eliminatee v_prenex_26 vanished before elimination [2021-06-05 04:31:31,808 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 04:31:31,808 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:133, output treesize:22 [2021-06-05 04:31:31,852 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 04:31:31,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1655818487] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:31:31,853 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:31:31,853 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 04:31:31,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958494802] [2021-06-05 04:31:31,853 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:31:31,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:31:31,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:31:31,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:31:31,854 INFO L87 Difference]: Start difference. First operand 67 states and 141 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:31:31,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:31:31,909 INFO L93 Difference]: Finished difference Result 86 states and 179 transitions. [2021-06-05 04:31:31,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:31:31,910 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 04:31:31,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:31:31,910 INFO L225 Difference]: With dead ends: 86 [2021-06-05 04:31:31,910 INFO L226 Difference]: Without dead ends: 86 [2021-06-05 04:31:31,910 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 103.0ms TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:31:31,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-06-05 04:31:31,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 67. [2021-06-05 04:31:31,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 2.1363636363636362) internal successors, (141), 66 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:31:31,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 141 transitions. [2021-06-05 04:31:31,913 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 141 transitions. Word has length 15 [2021-06-05 04:31:31,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:31:31,913 INFO L482 AbstractCegarLoop]: Abstraction has 67 states and 141 transitions. [2021-06-05 04:31:31,913 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 04:31:31,913 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 141 transitions. [2021-06-05 04:31:31,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:31:31,913 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:31:31,913 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:31:32,128 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable93 [2021-06-05 04:31:32,129 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:31:32,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:31:32,129 INFO L82 PathProgramCache]: Analyzing trace with hash 1077295942, now seen corresponding path program 21 times [2021-06-05 04:31:32,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:31:32,129 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031753571] [2021-06-05 04:31:32,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:31:32,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:31:32,194 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 04:31:32,194 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:31:32,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031753571] [2021-06-05 04:31:32,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031753571] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:31:32,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17563240] [2021-06-05 04:31:32,194 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:31:32,224 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:31:32,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:31:32,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:31:32,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:31:32,328 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:31:32,328 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:31:32,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:31:32,329 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:31:32,332 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:31:32,333 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 04:31:32,333 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:31:32,379 INFO L628 ElimStorePlain]: treesize reduction 68, result has 36.4 percent of original size [2021-06-05 04:31:32,379 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 04:31:32,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:31:32,383 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:31:32,400 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:31:32,400 INFO L518 ElimStorePlain]: Eliminatee v_prenex_28 vanished before elimination [2021-06-05 04:31:32,401 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 04:31:32,401 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-06-05 04:31:32,431 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 04:31:32,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [17563240] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:31:32,431 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:31:32,431 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 04:31:32,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287848845] [2021-06-05 04:31:32,436 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:31:32,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:31:32,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:31:32,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:31:32,437 INFO L87 Difference]: Start difference. First operand 67 states and 141 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:31:32,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:31:32,555 INFO L93 Difference]: Finished difference Result 69 states and 144 transitions. [2021-06-05 04:31:32,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:31:32,556 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 04:31:32,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:31:32,556 INFO L225 Difference]: With dead ends: 69 [2021-06-05 04:31:32,556 INFO L226 Difference]: Without dead ends: 69 [2021-06-05 04:31:32,556 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 166.2ms TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:31:32,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-06-05 04:31:32,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 61. [2021-06-05 04:31:32,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 2.1333333333333333) internal successors, (128), 60 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:31:32,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 128 transitions. [2021-06-05 04:31:32,558 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 128 transitions. Word has length 15 [2021-06-05 04:31:32,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:31:32,558 INFO L482 AbstractCegarLoop]: Abstraction has 61 states and 128 transitions. [2021-06-05 04:31:32,559 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:31:32,559 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 128 transitions. [2021-06-05 04:31:32,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:31:32,559 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:31:32,559 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:31:32,768 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2021-06-05 04:31:32,769 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:31:32,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:31:32,769 INFO L82 PathProgramCache]: Analyzing trace with hash 2129293846, now seen corresponding path program 22 times [2021-06-05 04:31:32,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:31:32,769 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616134289] [2021-06-05 04:31:32,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:31:32,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:31:32,824 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 04:31:32,824 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:31:32,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616134289] [2021-06-05 04:31:32,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616134289] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:31:32,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449483696] [2021-06-05 04:31:32,825 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 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 04:31:32,864 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:31:32,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:31:32,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:31:32,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:31:32,939 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:31:32,940 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:31:32,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:31:32,941 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:31:32,943 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:31:32,944 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:31:32,944 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 04:31:32,945 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:31:32,948 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:31:32,948 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:31:32,948 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 16 treesize of output 12 [2021-06-05 04:31:32,949 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:31:32,951 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:31:32,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:31:32,952 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:31:32,984 INFO L628 ElimStorePlain]: treesize reduction 53, result has 36.9 percent of original size [2021-06-05 04:31:32,984 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 04:31:32,985 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 04:31:32,985 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:121, output treesize:15 [2021-06-05 04:31:33,009 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 04:31:33,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1449483696] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:31:33,010 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:31:33,010 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 04:31:33,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739033201] [2021-06-05 04:31:33,010 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:31:33,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:31:33,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:31:33,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:31:33,011 INFO L87 Difference]: Start difference. First operand 61 states and 128 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:31:33,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:31:33,150 INFO L93 Difference]: Finished difference Result 89 states and 172 transitions. [2021-06-05 04:31:33,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:31:33,150 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 04:31:33,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:31:33,151 INFO L225 Difference]: With dead ends: 89 [2021-06-05 04:31:33,151 INFO L226 Difference]: Without dead ends: 86 [2021-06-05 04:31:33,151 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 141.4ms TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:31:33,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-06-05 04:31:33,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 66. [2021-06-05 04:31:33,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 2.1384615384615384) internal successors, (139), 65 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:31:33,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 139 transitions. [2021-06-05 04:31:33,154 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 139 transitions. Word has length 15 [2021-06-05 04:31:33,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:31:33,154 INFO L482 AbstractCegarLoop]: Abstraction has 66 states and 139 transitions. [2021-06-05 04:31:33,154 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:31:33,154 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 139 transitions. [2021-06-05 04:31:33,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:31:33,155 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:31:33,155 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:31:33,368 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:31:33,369 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:31:33,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:31:33,369 INFO L82 PathProgramCache]: Analyzing trace with hash -1739535948, now seen corresponding path program 23 times [2021-06-05 04:31:33,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:31:33,369 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189452519] [2021-06-05 04:31:33,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:31:33,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:31:33,424 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 04:31:33,425 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:31:33,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189452519] [2021-06-05 04:31:33,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189452519] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:31:33,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536841767] [2021-06-05 04:31:33,425 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:31:33,447 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:31:33,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:31:33,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:31:33,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:31:33,532 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 04:31:33,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1536841767] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:31:33,532 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:31:33,532 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 04:31:33,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654352578] [2021-06-05 04:31:33,532 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:31:33,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:31:33,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:31:33,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:31:33,533 INFO L87 Difference]: Start difference. First operand 66 states and 139 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:31:33,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:31:33,626 INFO L93 Difference]: Finished difference Result 91 states and 177 transitions. [2021-06-05 04:31:33,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:31:33,626 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 04:31:33,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:31:33,626 INFO L225 Difference]: With dead ends: 91 [2021-06-05 04:31:33,626 INFO L226 Difference]: Without dead ends: 91 [2021-06-05 04:31:33,626 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 120.9ms TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:31:33,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-06-05 04:31:33,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 64. [2021-06-05 04:31:33,628 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 04:31:33,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 131 transitions. [2021-06-05 04:31:33,628 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 131 transitions. Word has length 15 [2021-06-05 04:31:33,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:31:33,629 INFO L482 AbstractCegarLoop]: Abstraction has 64 states and 131 transitions. [2021-06-05 04:31:33,629 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:31:33,629 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 131 transitions. [2021-06-05 04:31:33,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:31:33,629 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:31:33,629 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:31:33,840 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2021-06-05 04:31:33,841 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:31:33,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:31:33,841 INFO L82 PathProgramCache]: Analyzing trace with hash -1029488178, now seen corresponding path program 24 times [2021-06-05 04:31:33,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:31:33,841 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267179295] [2021-06-05 04:31:33,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:31:33,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:31:33,928 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 04:31:33,928 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:31:33,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267179295] [2021-06-05 04:31:33,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267179295] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:31:33,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357141464] [2021-06-05 04:31:33,928 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:31:33,951 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:31:33,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:31:33,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:31:33,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:31:34,028 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:31:34,029 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:31:34,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:31:34,030 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:31:34,033 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:31:34,033 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:31:34,033 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 04:31:34,034 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:31:34,037 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:31:34,037 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:31:34,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:31:34,038 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:31:34,041 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:31:34,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:31:34,042 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:31:34,079 INFO L628 ElimStorePlain]: treesize reduction 53, result has 36.9 percent of original size [2021-06-05 04:31:34,080 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 04:31:34,081 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 04:31:34,081 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:121, output treesize:15 [2021-06-05 04:31:34,113 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 04:31:34,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [357141464] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:31:34,114 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:31:34,114 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 04:31:34,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994404641] [2021-06-05 04:31:34,114 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:31:34,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:31:34,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:31:34,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:31:34,115 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 04:31:34,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:31:34,263 INFO L93 Difference]: Finished difference Result 87 states and 167 transitions. [2021-06-05 04:31:34,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:31:34,263 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 04:31:34,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:31:34,263 INFO L225 Difference]: With dead ends: 87 [2021-06-05 04:31:34,263 INFO L226 Difference]: Without dead ends: 87 [2021-06-05 04:31:34,264 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 187.5ms TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:31:34,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-06-05 04:31:34,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 63. [2021-06-05 04:31:34,265 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 04:31:34,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 129 transitions. [2021-06-05 04:31:34,266 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 129 transitions. Word has length 15 [2021-06-05 04:31:34,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:31:34,266 INFO L482 AbstractCegarLoop]: Abstraction has 63 states and 129 transitions. [2021-06-05 04:31:34,266 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 04:31:34,266 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 129 transitions. [2021-06-05 04:31:34,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:31:34,266 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:31:34,266 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:31:34,468 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-06-05 04:31:34,469 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:31:34,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:31:34,469 INFO L82 PathProgramCache]: Analyzing trace with hash 1032427124, now seen corresponding path program 25 times [2021-06-05 04:31:34,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:31:34,469 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852756002] [2021-06-05 04:31:34,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:31:34,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:31:34,539 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 04:31:34,539 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:31:34,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852756002] [2021-06-05 04:31:34,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852756002] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:31:34,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638368509] [2021-06-05 04:31:34,540 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:31:34,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:31:34,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:31:34,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:31:34,637 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 04:31:34,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1638368509] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:31:34,637 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:31:34,637 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 04:31:34,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563852760] [2021-06-05 04:31:34,638 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:31:34,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:31:34,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:31:34,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:31:34,638 INFO L87 Difference]: Start difference. First operand 63 states and 129 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:31:34,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:31:34,779 INFO L93 Difference]: Finished difference Result 70 states and 139 transitions. [2021-06-05 04:31:34,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:31:34,779 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 04:31:34,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:31:34,780 INFO L225 Difference]: With dead ends: 70 [2021-06-05 04:31:34,780 INFO L226 Difference]: Without dead ends: 66 [2021-06-05 04:31:34,780 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 167.9ms TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:31:34,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-06-05 04:31:34,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 63. [2021-06-05 04:31:34,782 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 04:31:34,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 128 transitions. [2021-06-05 04:31:34,782 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 128 transitions. Word has length 15 [2021-06-05 04:31:34,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:31:34,782 INFO L482 AbstractCegarLoop]: Abstraction has 63 states and 128 transitions. [2021-06-05 04:31:34,782 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:31:34,782 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 128 transitions. [2021-06-05 04:31:34,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:31:34,783 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:31:34,783 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:31:34,983 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2021-06-05 04:31:34,983 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:31:34,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:31:34,984 INFO L82 PathProgramCache]: Analyzing trace with hash 1119308358, now seen corresponding path program 26 times [2021-06-05 04:31:34,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:31:34,984 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768337107] [2021-06-05 04:31:34,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:31:34,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:31:35,033 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 04:31:35,033 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:31:35,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768337107] [2021-06-05 04:31:35,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768337107] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:31:35,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133478474] [2021-06-05 04:31:35,033 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:31:35,057 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:31:35,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:31:35,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:31:35,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:31:35,122 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:31:35,122 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:31:35,123 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 04:31:35,124 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:31:35,126 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:31:35,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:31:35,127 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:31:35,146 INFO L628 ElimStorePlain]: treesize reduction 29, result has 32.6 percent of original size [2021-06-05 04:31:35,146 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 04:31:35,147 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 04:31:35,147 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:57, output treesize:6 [2021-06-05 04:31:35,155 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 04:31:35,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2133478474] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:31:35,155 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:31:35,155 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 04:31:35,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98298630] [2021-06-05 04:31:35,155 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:31:35,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:31:35,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:31:35,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:31:35,156 INFO L87 Difference]: Start difference. First operand 63 states and 128 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:31:35,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:31:35,198 INFO L93 Difference]: Finished difference Result 70 states and 140 transitions. [2021-06-05 04:31:35,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:31:35,199 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 04:31:35,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:31:35,199 INFO L225 Difference]: With dead ends: 70 [2021-06-05 04:31:35,199 INFO L226 Difference]: Without dead ends: 70 [2021-06-05 04:31:35,199 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 61.2ms TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:31:35,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-06-05 04:31:35,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 59. [2021-06-05 04:31:35,201 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 04:31:35,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 119 transitions. [2021-06-05 04:31:35,201 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 119 transitions. Word has length 15 [2021-06-05 04:31:35,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:31:35,201 INFO L482 AbstractCegarLoop]: Abstraction has 59 states and 119 transitions. [2021-06-05 04:31:35,201 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:31:35,202 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 119 transitions. [2021-06-05 04:31:35,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:31:35,202 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:31:35,202 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:31:35,423 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2021-06-05 04:31:35,423 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:31:35,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:31:35,424 INFO L82 PathProgramCache]: Analyzing trace with hash 1684129998, now seen corresponding path program 27 times [2021-06-05 04:31:35,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:31:35,424 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139346720] [2021-06-05 04:31:35,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:31:35,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:31:35,510 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:31:35,510 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:31:35,510 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139346720] [2021-06-05 04:31:35,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139346720] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:31:35,510 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724552937] [2021-06-05 04:31:35,510 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:31:35,538 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 04:31:35,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:31:35,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:31:35,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:31:35,645 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 04:31:35,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [724552937] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:31:35,646 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:31:35,646 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 04:31:35,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289475676] [2021-06-05 04:31:35,646 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:31:35,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:31:35,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:31:35,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:31:35,647 INFO L87 Difference]: Start difference. First operand 59 states and 119 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:31:35,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:31:35,794 INFO L93 Difference]: Finished difference Result 69 states and 134 transitions. [2021-06-05 04:31:35,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:31:35,794 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 04:31:35,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:31:35,795 INFO L225 Difference]: With dead ends: 69 [2021-06-05 04:31:35,795 INFO L226 Difference]: Without dead ends: 63 [2021-06-05 04:31:35,795 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 209.5ms TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:31:35,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-06-05 04:31:35,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 59. [2021-06-05 04:31:35,797 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 04:31:35,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 118 transitions. [2021-06-05 04:31:35,797 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 118 transitions. Word has length 15 [2021-06-05 04:31:35,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:31:35,797 INFO L482 AbstractCegarLoop]: Abstraction has 59 states and 118 transitions. [2021-06-05 04:31:35,797 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:31:35,797 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 118 transitions. [2021-06-05 04:31:35,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:31:35,798 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:31:35,798 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:31:35,998 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:31:35,998 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:31:35,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:31:35,999 INFO L82 PathProgramCache]: Analyzing trace with hash -962778214, now seen corresponding path program 28 times [2021-06-05 04:31:35,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:31:35,999 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039044503] [2021-06-05 04:31:35,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:31:36,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:31:36,064 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:31:36,064 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:31:36,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039044503] [2021-06-05 04:31:36,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039044503] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:31:36,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556439484] [2021-06-05 04:31:36,065 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:31:36,093 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:31:36,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:31:36,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:31:36,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:31:36,185 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:31:36,185 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:31:36,186 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 16 treesize of output 12 [2021-06-05 04:31:36,187 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:31:36,189 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:31:36,189 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 15 treesize of output 11 [2021-06-05 04:31:36,190 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:31:36,205 INFO L628 ElimStorePlain]: treesize reduction 29, result has 32.6 percent of original size [2021-06-05 04:31:36,206 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 04:31:36,207 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 04:31:36,207 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:57, output treesize:6 [2021-06-05 04:31:36,211 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 04:31:36,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1556439484] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:31:36,211 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:31:36,211 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 04:31:36,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67922287] [2021-06-05 04:31:36,212 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:31:36,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:31:36,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:31:36,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:31:36,213 INFO L87 Difference]: Start difference. First operand 59 states and 118 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:31:36,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:31:36,251 INFO L93 Difference]: Finished difference Result 67 states and 134 transitions. [2021-06-05 04:31:36,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:31:36,252 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 04:31:36,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:31:36,252 INFO L225 Difference]: With dead ends: 67 [2021-06-05 04:31:36,252 INFO L226 Difference]: Without dead ends: 67 [2021-06-05 04:31:36,252 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 83.2ms TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:31:36,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-06-05 04:31:36,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 59. [2021-06-05 04:31:36,254 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 04:31:36,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 118 transitions. [2021-06-05 04:31:36,254 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 118 transitions. Word has length 15 [2021-06-05 04:31:36,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:31:36,254 INFO L482 AbstractCegarLoop]: Abstraction has 59 states and 118 transitions. [2021-06-05 04:31:36,254 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 04:31:36,254 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 118 transitions. [2021-06-05 04:31:36,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:31:36,255 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:31:36,255 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:31:36,477 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2021-06-05 04:31:36,478 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:31:36,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:31:36,478 INFO L82 PathProgramCache]: Analyzing trace with hash -1748832234, now seen corresponding path program 29 times [2021-06-05 04:31:36,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:31:36,478 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349591302] [2021-06-05 04:31:36,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:31:36,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:31:36,538 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 04:31:36,538 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:31:36,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349591302] [2021-06-05 04:31:36,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349591302] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:31:36,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127189831] [2021-06-05 04:31:36,539 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:31:36,569 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:31:36,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:31:36,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:31:36,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:31:36,659 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 04:31:36,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2127189831] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:31:36,660 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:31:36,660 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 04:31:36,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038104236] [2021-06-05 04:31:36,661 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:31:36,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:31:36,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:31:36,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:31:36,661 INFO L87 Difference]: Start difference. First operand 59 states and 118 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:31:36,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:31:36,828 INFO L93 Difference]: Finished difference Result 77 states and 144 transitions. [2021-06-05 04:31:36,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:31:36,828 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 04:31:36,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:31:36,829 INFO L225 Difference]: With dead ends: 77 [2021-06-05 04:31:36,829 INFO L226 Difference]: Without dead ends: 74 [2021-06-05 04:31:36,829 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 187.3ms TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:31:36,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-06-05 04:31:36,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 63. [2021-06-05 04:31:36,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 2.032258064516129) internal successors, (126), 62 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:31:36,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 126 transitions. [2021-06-05 04:31:36,836 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 126 transitions. Word has length 15 [2021-06-05 04:31:36,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:31:36,836 INFO L482 AbstractCegarLoop]: Abstraction has 63 states and 126 transitions. [2021-06-05 04:31:36,836 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:31:36,836 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 126 transitions. [2021-06-05 04:31:36,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:31:36,836 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:31:36,836 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:31:37,057 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:31:37,057 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:31:37,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:31:37,057 INFO L82 PathProgramCache]: Analyzing trace with hash -1972763702, now seen corresponding path program 30 times [2021-06-05 04:31:37,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:31:37,058 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608713262] [2021-06-05 04:31:37,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:31:37,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:31:37,136 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:31:37,136 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:31:37,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608713262] [2021-06-05 04:31:37,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608713262] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:31:37,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454481921] [2021-06-05 04:31:37,137 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 04:31:37,160 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 04:31:37,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:31:37,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:31:37,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:31:37,211 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:31:37,211 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:31:37,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:31:37,213 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:31:37,215 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:31:37,215 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:31:37,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 04:31:37,216 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:31:37,220 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:31:37,220 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:31:37,220 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 17 treesize of output 13 [2021-06-05 04:31:37,221 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:31:37,223 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:31:37,224 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 18 treesize of output 14 [2021-06-05 04:31:37,224 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:31:37,264 INFO L628 ElimStorePlain]: treesize reduction 73, result has 38.7 percent of original size [2021-06-05 04:31:37,266 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:31:37,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 04:31:37,268 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:31:37,285 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:31:37,286 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 04:31:37,286 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:141, output treesize:22 [2021-06-05 04:31:37,323 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 04:31:37,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [454481921] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:31:37,323 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:31:37,323 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 04:31:37,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770807463] [2021-06-05 04:31:37,323 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:31:37,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:31:37,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:31:37,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:31:37,324 INFO L87 Difference]: Start difference. First operand 63 states and 126 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:31:37,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:31:37,389 INFO L93 Difference]: Finished difference Result 79 states and 158 transitions. [2021-06-05 04:31:37,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:31:37,390 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 04:31:37,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:31:37,390 INFO L225 Difference]: With dead ends: 79 [2021-06-05 04:31:37,390 INFO L226 Difference]: Without dead ends: 79 [2021-06-05 04:31:37,391 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 114.8ms TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:31:37,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-06-05 04:31:37,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 63. [2021-06-05 04:31:37,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 2.032258064516129) internal successors, (126), 62 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:31:37,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 126 transitions. [2021-06-05 04:31:37,393 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 126 transitions. Word has length 15 [2021-06-05 04:31:37,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:31:37,393 INFO L482 AbstractCegarLoop]: Abstraction has 63 states and 126 transitions. [2021-06-05 04:31:37,393 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 04:31:37,393 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 126 transitions. [2021-06-05 04:31:37,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:31:37,393 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:31:37,393 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:31:37,594 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:31:37,594 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:31:37,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:31:37,594 INFO L82 PathProgramCache]: Analyzing trace with hash -612646962, now seen corresponding path program 31 times [2021-06-05 04:31:37,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:31:37,595 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534010872] [2021-06-05 04:31:37,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:31:37,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:31:37,664 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 04:31:37,665 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:31:37,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534010872] [2021-06-05 04:31:37,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534010872] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:31:37,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910989660] [2021-06-05 04:31:37,665 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:31:37,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:31:37,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:31:37,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:31:37,802 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:31:37,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [910989660] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:31:37,802 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:31:37,802 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 04:31:37,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567054611] [2021-06-05 04:31:37,803 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:31:37,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:31:37,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:31:37,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:31:37,803 INFO L87 Difference]: Start difference. First operand 63 states and 126 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:31:37,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:31:37,913 INFO L93 Difference]: Finished difference Result 62 states and 123 transitions. [2021-06-05 04:31:37,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:31:37,914 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 04:31:37,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:31:37,914 INFO L225 Difference]: With dead ends: 62 [2021-06-05 04:31:37,914 INFO L226 Difference]: Without dead ends: 62 [2021-06-05 04:31:37,914 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 131.4ms TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:31:37,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-06-05 04:31:37,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 57. [2021-06-05 04:31:37,916 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 04:31:37,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 113 transitions. [2021-06-05 04:31:37,916 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 113 transitions. Word has length 15 [2021-06-05 04:31:37,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:31:37,917 INFO L482 AbstractCegarLoop]: Abstraction has 57 states and 113 transitions. [2021-06-05 04:31:37,917 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:31:37,917 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 113 transitions. [2021-06-05 04:31:37,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:31:37,917 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:31:37,917 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:31:38,128 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:31:38,129 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:31:38,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:31:38,129 INFO L82 PathProgramCache]: Analyzing trace with hash 439350942, now seen corresponding path program 32 times [2021-06-05 04:31:38,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:31:38,129 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982764530] [2021-06-05 04:31:38,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:31:38,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:31:38,180 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 04:31:38,181 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:31:38,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982764530] [2021-06-05 04:31:38,181 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982764530] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:31:38,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020861032] [2021-06-05 04:31:38,181 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 04:31:38,203 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:31:38,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:31:38,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:31:38,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:31:38,322 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 04:31:38,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2020861032] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:31:38,322 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:31:38,322 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 04:31:38,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576323052] [2021-06-05 04:31:38,323 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:31:38,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:31:38,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:31:38,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:31:38,323 INFO L87 Difference]: Start difference. First operand 57 states and 113 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:31:38,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:31:38,411 INFO L93 Difference]: Finished difference Result 84 states and 158 transitions. [2021-06-05 04:31:38,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:31:38,412 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 04:31:38,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:31:38,412 INFO L225 Difference]: With dead ends: 84 [2021-06-05 04:31:38,412 INFO L226 Difference]: Without dead ends: 81 [2021-06-05 04:31:38,412 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 110.8ms TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:31:38,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-06-05 04:31:38,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 64. [2021-06-05 04:31:38,414 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 04:31:38,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 131 transitions. [2021-06-05 04:31:38,414 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 131 transitions. Word has length 15 [2021-06-05 04:31:38,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:31:38,414 INFO L482 AbstractCegarLoop]: Abstraction has 64 states and 131 transitions. [2021-06-05 04:31:38,415 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:31:38,415 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 131 transitions. [2021-06-05 04:31:38,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:31:38,415 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:31:38,415 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:31:38,624 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable174 [2021-06-05 04:31:38,625 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:31:38,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:31:38,626 INFO L82 PathProgramCache]: Analyzing trace with hash 215419474, now seen corresponding path program 33 times [2021-06-05 04:31:38,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:31:38,626 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462578629] [2021-06-05 04:31:38,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:31:38,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:31:38,689 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 04:31:38,689 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:31:38,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462578629] [2021-06-05 04:31:38,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462578629] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:31:38,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607467339] [2021-06-05 04:31:38,689 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 04:31:38,731 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:31:38,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:31:38,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:31:38,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:31:38,818 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:31:38,820 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:31:38,820 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 04:31:38,821 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:31:38,824 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:31:38,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:31:38,825 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:31:38,872 INFO L628 ElimStorePlain]: treesize reduction 68, result has 36.4 percent of original size [2021-06-05 04:31:38,872 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 04:31:38,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:31:38,875 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:31:38,887 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:31:38,887 INFO L518 ElimStorePlain]: Eliminatee v_prenex_31 vanished before elimination [2021-06-05 04:31:38,888 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:31:38,888 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-06-05 04:31:38,912 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 04:31:38,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [607467339] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:31:38,912 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:31:38,912 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 04:31:38,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455871500] [2021-06-05 04:31:38,912 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:31:38,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:31:38,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:31:38,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:31:38,913 INFO L87 Difference]: Start difference. First operand 64 states and 131 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:31:39,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:31:39,026 INFO L93 Difference]: Finished difference Result 83 states and 160 transitions. [2021-06-05 04:31:39,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:31:39,026 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 04:31:39,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:31:39,027 INFO L225 Difference]: With dead ends: 83 [2021-06-05 04:31:39,027 INFO L226 Difference]: Without dead ends: 83 [2021-06-05 04:31:39,027 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 139.7ms TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:31:39,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-06-05 04:31:39,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 64. [2021-06-05 04:31:39,028 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 04:31:39,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 131 transitions. [2021-06-05 04:31:39,028 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 131 transitions. Word has length 15 [2021-06-05 04:31:39,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:31:39,029 INFO L482 AbstractCegarLoop]: Abstraction has 64 states and 131 transitions. [2021-06-05 04:31:39,029 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:31:39,029 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 131 transitions. [2021-06-05 04:31:39,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:31:39,029 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:31:39,029 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:31:39,240 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:31:39,241 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:31:39,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:31:39,241 INFO L82 PathProgramCache]: Analyzing trace with hash -1195371358, now seen corresponding path program 34 times [2021-06-05 04:31:39,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:31:39,241 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988552404] [2021-06-05 04:31:39,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:31:39,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:31:39,298 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 04:31:39,299 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:31:39,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988552404] [2021-06-05 04:31:39,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988552404] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:31:39,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757496605] [2021-06-05 04:31:39,299 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:31:39,321 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:31:39,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:31:39,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:31:39,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:31:39,401 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:31:39,401 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:31:39,402 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 16 treesize of output 12 [2021-06-05 04:31:39,403 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:31:39,405 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:31:39,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:31:39,406 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:31:39,445 INFO L628 ElimStorePlain]: treesize reduction 68, result has 36.4 percent of original size [2021-06-05 04:31:39,445 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 04:31:39,447 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 8 treesize of output 6 [2021-06-05 04:31:39,459 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:31:39,471 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:31:39,472 INFO L518 ElimStorePlain]: Eliminatee v_prenex_34 vanished before elimination [2021-06-05 04:31:39,473 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:31:39,473 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-06-05 04:31:39,497 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 04:31:39,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [757496605] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:31:39,497 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:31:39,497 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 04:31:39,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300991588] [2021-06-05 04:31:39,498 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:31:39,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:31:39,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:31:39,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:31:39,498 INFO L87 Difference]: Start difference. First operand 64 states and 131 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:31:39,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:31:39,687 INFO L93 Difference]: Finished difference Result 85 states and 161 transitions. [2021-06-05 04:31:39,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:31:39,688 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 04:31:39,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:31:39,688 INFO L225 Difference]: With dead ends: 85 [2021-06-05 04:31:39,688 INFO L226 Difference]: Without dead ends: 83 [2021-06-05 04:31:39,688 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 189.6ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:31:39,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-06-05 04:31:39,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 64. [2021-06-05 04:31:39,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 2.0634920634920637) internal successors, (130), 63 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:31:39,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 130 transitions. [2021-06-05 04:31:39,690 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 130 transitions. Word has length 15 [2021-06-05 04:31:39,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:31:39,690 INFO L482 AbstractCegarLoop]: Abstraction has 64 states and 130 transitions. [2021-06-05 04:31:39,690 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:31:39,690 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 130 transitions. [2021-06-05 04:31:39,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:31:39,691 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:31:39,691 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:31:39,891 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable194 [2021-06-05 04:31:39,891 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:31:39,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:31:39,892 INFO L82 PathProgramCache]: Analyzing trace with hash 1575536214, now seen corresponding path program 35 times [2021-06-05 04:31:39,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:31:39,892 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379969079] [2021-06-05 04:31:39,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:31:39,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:31:39,950 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 04:31:39,950 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:31:39,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379969079] [2021-06-05 04:31:39,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379969079] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:31:39,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557235127] [2021-06-05 04:31:39,951 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:31:39,983 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:31:39,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:31:39,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:31:39,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:31:40,099 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 04:31:40,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1557235127] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:31:40,099 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:31:40,099 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 04:31:40,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329170960] [2021-06-05 04:31:40,100 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:31:40,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:31:40,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:31:40,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:31:40,100 INFO L87 Difference]: Start difference. First operand 64 states and 130 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:31:40,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:31:40,245 INFO L93 Difference]: Finished difference Result 84 states and 160 transitions. [2021-06-05 04:31:40,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:31:40,246 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 04:31:40,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:31:40,246 INFO L225 Difference]: With dead ends: 84 [2021-06-05 04:31:40,246 INFO L226 Difference]: Without dead ends: 84 [2021-06-05 04:31:40,246 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 154.8ms TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:31:40,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-06-05 04:31:40,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 63. [2021-06-05 04:31:40,248 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 04:31:40,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 128 transitions. [2021-06-05 04:31:40,250 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 128 transitions. Word has length 15 [2021-06-05 04:31:40,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:31:40,250 INFO L482 AbstractCegarLoop]: Abstraction has 63 states and 128 transitions. [2021-06-05 04:31:40,250 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 04:31:40,250 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 128 transitions. [2021-06-05 04:31:40,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:31:40,250 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:31:40,250 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:31:40,458 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable202 [2021-06-05 04:31:40,458 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:31:40,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:31:40,458 INFO L82 PathProgramCache]: Analyzing trace with hash -657515780, now seen corresponding path program 36 times [2021-06-05 04:31:40,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:31:40,459 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817761281] [2021-06-05 04:31:40,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:31:40,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:31:40,513 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:31:40,513 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:31:40,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817761281] [2021-06-05 04:31:40,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817761281] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:31:40,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525607102] [2021-06-05 04:31:40,513 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:31:40,535 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 04:31:40,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:31:40,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:31:40,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:31:40,650 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 04:31:40,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [525607102] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:31:40,650 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:31:40,650 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 04:31:40,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006191161] [2021-06-05 04:31:40,651 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:31:40,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:31:40,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:31:40,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:31:40,651 INFO L87 Difference]: Start difference. First operand 63 states and 128 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:31:40,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:31:40,714 INFO L93 Difference]: Finished difference Result 67 states and 132 transitions. [2021-06-05 04:31:40,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:31:40,715 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 04:31:40,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:31:40,715 INFO L225 Difference]: With dead ends: 67 [2021-06-05 04:31:40,715 INFO L226 Difference]: Without dead ends: 63 [2021-06-05 04:31:40,715 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 112.6ms TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:31:40,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-06-05 04:31:40,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2021-06-05 04:31:40,716 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 04:31:40,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 127 transitions. [2021-06-05 04:31:40,717 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 127 transitions. Word has length 15 [2021-06-05 04:31:40,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:31:40,717 INFO L482 AbstractCegarLoop]: Abstraction has 63 states and 127 transitions. [2021-06-05 04:31:40,717 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:31:40,717 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 127 transitions. [2021-06-05 04:31:40,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:31:40,717 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:31:40,717 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:31:40,918 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable212 [2021-06-05 04:31:40,918 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:31:40,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:31:40,918 INFO L82 PathProgramCache]: Analyzing trace with hash -570634546, now seen corresponding path program 37 times [2021-06-05 04:31:40,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:31:40,918 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248162266] [2021-06-05 04:31:40,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:31:40,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:31:40,964 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 04:31:40,965 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:31:40,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248162266] [2021-06-05 04:31:40,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248162266] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:31:40,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601444243] [2021-06-05 04:31:40,965 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:31:40,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:31:40,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:31:40,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:31:41,072 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 04:31:41,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [601444243] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:31:41,072 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:31:41,072 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 04:31:41,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224657392] [2021-06-05 04:31:41,072 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:31:41,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:31:41,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:31:41,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:31:41,073 INFO L87 Difference]: Start difference. First operand 63 states and 127 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:31:41,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:31:41,121 INFO L93 Difference]: Finished difference Result 67 states and 133 transitions. [2021-06-05 04:31:41,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:31:41,125 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 04:31:41,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:31:41,125 INFO L225 Difference]: With dead ends: 67 [2021-06-05 04:31:41,126 INFO L226 Difference]: Without dead ends: 67 [2021-06-05 04:31:41,126 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 72.5ms TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:31:41,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-06-05 04:31:41,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 56. [2021-06-05 04:31:41,127 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 04:31:41,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 111 transitions. [2021-06-05 04:31:41,128 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 111 transitions. Word has length 15 [2021-06-05 04:31:41,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:31:41,129 INFO L482 AbstractCegarLoop]: Abstraction has 56 states and 111 transitions. [2021-06-05 04:31:41,129 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:31:41,129 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 111 transitions. [2021-06-05 04:31:41,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:31:41,129 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:31:41,130 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:31:41,351 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable216 [2021-06-05 04:31:41,352 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:31:41,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:31:41,352 INFO L82 PathProgramCache]: Analyzing trace with hash -889346478, now seen corresponding path program 38 times [2021-06-05 04:31:41,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:31:41,352 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921674916] [2021-06-05 04:31:41,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:31:41,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:31:41,392 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 04:31:41,392 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:31:41,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921674916] [2021-06-05 04:31:41,393 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921674916] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:31:41,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778560969] [2021-06-05 04:31:41,393 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 04:31:41,414 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:31:41,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:31:41,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:31:41,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:31:41,494 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:31:41,494 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:31:41,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:31:41,496 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:31:41,499 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:31:41,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:31:41,501 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:31:41,560 INFO L628 ElimStorePlain]: treesize reduction 70, result has 41.2 percent of original size [2021-06-05 04:31:41,562 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:31:41,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-06-05 04:31:41,565 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:31:41,581 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:31:41,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:31:41,584 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:31:41,599 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:31:41,599 INFO L518 ElimStorePlain]: Eliminatee v_prenex_38 vanished before elimination [2021-06-05 04:31:41,600 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 04:31:41,601 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:133, output treesize:22 [2021-06-05 04:31:41,628 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 04:31:41,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [778560969] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:31:41,628 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:31:41,629 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 04:31:41,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761384351] [2021-06-05 04:31:41,629 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:31:41,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:31:41,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:31:41,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:31:41,629 INFO L87 Difference]: Start difference. First operand 56 states and 111 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:31:41,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:31:41,803 INFO L93 Difference]: Finished difference Result 96 states and 176 transitions. [2021-06-05 04:31:41,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:31:41,804 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 04:31:41,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:31:41,804 INFO L225 Difference]: With dead ends: 96 [2021-06-05 04:31:41,804 INFO L226 Difference]: Without dead ends: 93 [2021-06-05 04:31:41,805 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 156.0ms TimeCoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:31:41,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-06-05 04:31:41,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 61. [2021-06-05 04:31:41,806 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 04:31:41,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 122 transitions. [2021-06-05 04:31:41,807 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 122 transitions. Word has length 15 [2021-06-05 04:31:41,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:31:41,807 INFO L482 AbstractCegarLoop]: Abstraction has 61 states and 122 transitions. [2021-06-05 04:31:41,807 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:31:41,807 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 122 transitions. [2021-06-05 04:31:41,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:31:41,807 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:31:41,807 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:31:42,008 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable220,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:31:42,008 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:31:42,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:31:42,008 INFO L82 PathProgramCache]: Analyzing trace with hash -1113277946, now seen corresponding path program 39 times [2021-06-05 04:31:42,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:31:42,008 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863144333] [2021-06-05 04:31:42,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:31:42,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:31:42,084 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:31:42,085 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:31:42,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863144333] [2021-06-05 04:31:42,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863144333] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:31:42,086 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1095152305] [2021-06-05 04:31:42,086 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 04:31:42,111 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:31:42,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:31:42,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:31:42,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:31:42,206 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:31:42,207 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:31:42,207 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 04:31:42,208 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:31:42,211 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:31:42,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:31:42,212 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:31:42,256 INFO L628 ElimStorePlain]: treesize reduction 60, result has 38.8 percent of original size [2021-06-05 04:31:42,256 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 04:31:42,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:31:42,260 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:31:42,277 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:31:42,278 INFO L518 ElimStorePlain]: Eliminatee v_prenex_41 vanished before elimination [2021-06-05 04:31:42,279 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 04:31:42,279 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-06-05 04:31:42,312 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 04:31:42,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1095152305] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:31:42,312 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:31:42,312 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 04:31:42,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930817435] [2021-06-05 04:31:42,313 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:31:42,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:31:42,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:31:42,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:31:42,313 INFO L87 Difference]: Start difference. First operand 61 states and 122 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:31:42,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:31:42,596 INFO L93 Difference]: Finished difference Result 80 states and 151 transitions. [2021-06-05 04:31:42,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:31:42,596 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 04:31:42,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:31:42,596 INFO L225 Difference]: With dead ends: 80 [2021-06-05 04:31:42,596 INFO L226 Difference]: Without dead ends: 80 [2021-06-05 04:31:42,597 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 329.7ms TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:31:42,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-06-05 04:31:42,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 61. [2021-06-05 04:31:42,598 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 04:31:42,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 122 transitions. [2021-06-05 04:31:42,598 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 122 transitions. Word has length 15 [2021-06-05 04:31:42,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:31:42,598 INFO L482 AbstractCegarLoop]: Abstraction has 61 states and 122 transitions. [2021-06-05 04:31:42,598 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:31:42,598 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 122 transitions. [2021-06-05 04:31:42,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:31:42,598 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:31:42,598 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:31:42,799 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable225 [2021-06-05 04:31:42,799 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:31:42,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:31:42,799 INFO L82 PathProgramCache]: Analyzing trace with hash 1770898518, now seen corresponding path program 40 times [2021-06-05 04:31:42,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:31:42,799 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503853692] [2021-06-05 04:31:42,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:31:42,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:31:42,873 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 04:31:42,873 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:31:42,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503853692] [2021-06-05 04:31:42,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503853692] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:31:42,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294739526] [2021-06-05 04:31:42,874 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:31:42,900 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:31:42,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:31:42,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:31:42,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:31:43,002 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:31:43,002 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:31:43,003 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 15 treesize of output 11 [2021-06-05 04:31:43,003 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:31:43,006 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:31:43,006 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 16 treesize of output 12 [2021-06-05 04:31:43,007 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:31:43,056 INFO L628 ElimStorePlain]: treesize reduction 68, result has 36.4 percent of original size [2021-06-05 04:31:43,056 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 04:31:43,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:31:43,060 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:31:43,077 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:31:43,077 INFO L518 ElimStorePlain]: Eliminatee v_prenex_44 vanished before elimination [2021-06-05 04:31:43,079 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:31:43,079 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-06-05 04:31:43,112 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 04:31:43,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [294739526] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:31:43,113 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:31:43,113 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 04:31:43,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508296] [2021-06-05 04:31:43,113 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:31:43,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:31:43,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:31:43,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:31:43,113 INFO L87 Difference]: Start difference. First operand 61 states and 122 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:31:43,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:31:43,519 INFO L93 Difference]: Finished difference Result 82 states and 152 transitions. [2021-06-05 04:31:43,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:31:43,524 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 04:31:43,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:31:43,524 INFO L225 Difference]: With dead ends: 82 [2021-06-05 04:31:43,525 INFO L226 Difference]: Without dead ends: 80 [2021-06-05 04:31:43,525 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 444.1ms TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:31:43,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-06-05 04:31:43,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 61. [2021-06-05 04:31:43,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 2.0166666666666666) internal successors, (121), 60 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:31:43,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 121 transitions. [2021-06-05 04:31:43,526 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 121 transitions. Word has length 15 [2021-06-05 04:31:43,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:31:43,527 INFO L482 AbstractCegarLoop]: Abstraction has 61 states and 121 transitions. [2021-06-05 04:31:43,527 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:31:43,527 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 121 transitions. [2021-06-05 04:31:43,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:31:43,527 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:31:43,527 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:31:43,728 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable232,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:31:43,729 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:31:43,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:31:43,730 INFO L82 PathProgramCache]: Analyzing trace with hash 246838794, now seen corresponding path program 41 times [2021-06-05 04:31:43,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:31:43,730 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983253513] [2021-06-05 04:31:43,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:31:43,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:31:43,780 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 04:31:43,781 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:31:43,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983253513] [2021-06-05 04:31:43,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983253513] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:31:43,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546729041] [2021-06-05 04:31:43,781 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:31:43,824 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:31:43,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:31:43,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:31:43,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:31:43,952 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 04:31:43,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1546729041] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:31:43,952 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:31:43,952 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 04:31:43,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990913486] [2021-06-05 04:31:43,953 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:31:43,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:31:43,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:31:43,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:31:43,953 INFO L87 Difference]: Start difference. First operand 61 states and 121 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:31:44,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:31:44,070 INFO L93 Difference]: Finished difference Result 92 states and 166 transitions. [2021-06-05 04:31:44,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:31:44,071 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 04:31:44,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:31:44,071 INFO L225 Difference]: With dead ends: 92 [2021-06-05 04:31:44,071 INFO L226 Difference]: Without dead ends: 92 [2021-06-05 04:31:44,071 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 147.7ms TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:31:44,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-06-05 04:31:44,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 60. [2021-06-05 04:31:44,073 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 04:31:44,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 119 transitions. [2021-06-05 04:31:44,073 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 119 transitions. Word has length 15 [2021-06-05 04:31:44,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:31:44,074 INFO L482 AbstractCegarLoop]: Abstraction has 60 states and 119 transitions. [2021-06-05 04:31:44,074 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:31:44,074 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 119 transitions. [2021-06-05 04:31:44,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:31:44,074 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:31:44,074 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:31:44,280 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240,42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:31:44,281 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:31:44,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:31:44,281 INFO L82 PathProgramCache]: Analyzing trace with hash -1986213200, now seen corresponding path program 42 times [2021-06-05 04:31:44,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:31:44,281 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638657094] [2021-06-05 04:31:44,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:31:44,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:31:44,339 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 04:31:44,339 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:31:44,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638657094] [2021-06-05 04:31:44,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638657094] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:31:44,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [340503949] [2021-06-05 04:31:44,339 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:31:44,362 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 04:31:44,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:31:44,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:31:44,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:31:44,483 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 04:31:44,483 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [340503949] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:31:44,483 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:31:44,483 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 04:31:44,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411167948] [2021-06-05 04:31:44,484 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:31:44,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:31:44,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:31:44,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:31:44,484 INFO L87 Difference]: Start difference. First operand 60 states and 119 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:31:44,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:31:44,592 INFO L93 Difference]: Finished difference Result 79 states and 144 transitions. [2021-06-05 04:31:44,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:31:44,592 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 04:31:44,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:31:44,592 INFO L225 Difference]: With dead ends: 79 [2021-06-05 04:31:44,592 INFO L226 Difference]: Without dead ends: 75 [2021-06-05 04:31:44,593 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 161.9ms TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:31:44,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-06-05 04:31:44,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 60. [2021-06-05 04:31:44,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 2.0) internal successors, (118), 59 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:31:44,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 118 transitions. [2021-06-05 04:31:44,594 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 118 transitions. Word has length 15 [2021-06-05 04:31:44,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:31:44,594 INFO L482 AbstractCegarLoop]: Abstraction has 60 states and 118 transitions. [2021-06-05 04:31:44,595 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:31:44,595 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 118 transitions. [2021-06-05 04:31:44,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:31:44,595 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:31:44,595 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:31:44,795 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable250,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:31:44,796 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:31:44,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:31:44,796 INFO L82 PathProgramCache]: Analyzing trace with hash -1899331966, now seen corresponding path program 43 times [2021-06-05 04:31:44,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:31:44,796 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405843467] [2021-06-05 04:31:44,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:31:44,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:31:44,838 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 04:31:44,838 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:31:44,838 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405843467] [2021-06-05 04:31:44,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405843467] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:31:44,838 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [236151089] [2021-06-05 04:31:44,838 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:31:44,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:31:44,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:31:44,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:31:44,957 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 04:31:44,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [236151089] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:31:44,957 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:31:44,957 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 04:31:44,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684466476] [2021-06-05 04:31:44,958 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:31:44,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:31:44,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:31:44,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:31:44,958 INFO L87 Difference]: Start difference. First operand 60 states and 118 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:31:45,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:31:45,072 INFO L93 Difference]: Finished difference Result 89 states and 166 transitions. [2021-06-05 04:31:45,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:31:45,076 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 04:31:45,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:31:45,077 INFO L225 Difference]: With dead ends: 89 [2021-06-05 04:31:45,077 INFO L226 Difference]: Without dead ends: 89 [2021-06-05 04:31:45,077 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 138.6ms TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:31:45,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-06-05 04:31:45,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 59. [2021-06-05 04:31:45,078 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 04:31:45,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 116 transitions. [2021-06-05 04:31:45,078 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 116 transitions. Word has length 15 [2021-06-05 04:31:45,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:31:45,078 INFO L482 AbstractCegarLoop]: Abstraction has 59 states and 116 transitions. [2021-06-05 04:31:45,079 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:31:45,079 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 116 transitions. [2021-06-05 04:31:45,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:31:45,079 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:31:45,079 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:31:45,279 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable255 [2021-06-05 04:31:45,279 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:31:45,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:31:45,280 INFO L82 PathProgramCache]: Analyzing trace with hash -1398467878, now seen corresponding path program 44 times [2021-06-05 04:31:45,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:31:45,280 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819002075] [2021-06-05 04:31:45,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:31:45,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:31:45,336 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 04:31:45,336 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:31:45,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819002075] [2021-06-05 04:31:45,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819002075] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:31:45,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745237250] [2021-06-05 04:31:45,336 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:31:45,369 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:31:45,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:31:45,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:31:45,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:31:45,434 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 04:31:45,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1745237250] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:31:45,434 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:31:45,434 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 04:31:45,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798296368] [2021-06-05 04:31:45,434 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:31:45,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:31:45,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:31:45,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:31:45,435 INFO L87 Difference]: Start difference. First operand 59 states and 116 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:31:45,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:31:45,557 INFO L93 Difference]: Finished difference Result 63 states and 120 transitions. [2021-06-05 04:31:45,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:31:45,558 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 04:31:45,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:31:45,558 INFO L225 Difference]: With dead ends: 63 [2021-06-05 04:31:45,558 INFO L226 Difference]: Without dead ends: 57 [2021-06-05 04:31:45,558 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 162.3ms TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:31:45,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-06-05 04:31:45,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2021-06-05 04:31:45,559 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 04:31:45,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 112 transitions. [2021-06-05 04:31:45,560 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 112 transitions. Word has length 15 [2021-06-05 04:31:45,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:31:45,560 INFO L482 AbstractCegarLoop]: Abstraction has 57 states and 112 transitions. [2021-06-05 04:31:45,560 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:31:45,560 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 112 transitions. [2021-06-05 04:31:45,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:31:45,560 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:31:45,560 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:31:45,768 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable259 [2021-06-05 04:31:45,769 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:31:45,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:31:45,769 INFO L82 PathProgramCache]: Analyzing trace with hash 1382942798, now seen corresponding path program 45 times [2021-06-05 04:31:45,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:31:45,769 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585254748] [2021-06-05 04:31:45,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:31:45,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:31:45,810 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 04:31:45,810 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:31:45,810 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585254748] [2021-06-05 04:31:45,810 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585254748] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:31:45,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584907109] [2021-06-05 04:31:45,811 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:31:45,833 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:31:45,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:31:45,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:31:45,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:31:45,887 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 24 treesize of output 18 [2021-06-05 04:31:45,889 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:31:45,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:31:45,892 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:31:45,908 INFO L628 ElimStorePlain]: treesize reduction 19, result has 38.7 percent of original size [2021-06-05 04:31:45,909 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 04:31:45,909 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:31:45,909 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:65, output treesize:12 [2021-06-05 04:31:45,924 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 04:31:45,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1584907109] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:31:45,925 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:31:45,925 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 04:31:45,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526553528] [2021-06-05 04:31:45,925 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:31:45,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:31:45,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:31:45,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:31:45,925 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 04:31:45,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:31:45,989 INFO L93 Difference]: Finished difference Result 64 states and 124 transitions. [2021-06-05 04:31:45,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:31:45,990 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 04:31:45,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:31:45,990 INFO L225 Difference]: With dead ends: 64 [2021-06-05 04:31:45,990 INFO L226 Difference]: Without dead ends: 64 [2021-06-05 04:31:45,990 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 81.7ms TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:31:45,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-06-05 04:31:45,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 52. [2021-06-05 04:31:45,991 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 04:31:45,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 100 transitions. [2021-06-05 04:31:45,992 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 100 transitions. Word has length 15 [2021-06-05 04:31:45,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:31:45,992 INFO L482 AbstractCegarLoop]: Abstraction has 52 states and 100 transitions. [2021-06-05 04:31:45,992 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 04:31:45,992 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 100 transitions. [2021-06-05 04:31:45,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:31:45,992 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:31:45,992 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:31:46,192 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable260,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:31:46,193 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:31:46,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:31:46,193 INFO L82 PathProgramCache]: Analyzing trace with hash -1355148170, now seen corresponding path program 46 times [2021-06-05 04:31:46,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:31:46,193 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830849824] [2021-06-05 04:31:46,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:31:46,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:31:46,332 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 04:31:46,332 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:31:46,332 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830849824] [2021-06-05 04:31:46,332 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830849824] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:31:46,332 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791074581] [2021-06-05 04:31:46,332 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:31:46,355 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:31:46,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:31:46,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:31:46,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:31:46,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 30 [2021-06-05 04:31:46,451 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:31:46,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-06-05 04:31:46,454 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:31:46,465 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:31:46,465 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 04:31:46,466 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:31:46,466 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:76, output treesize:37 [2021-06-05 04:31:46,515 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 04:31:46,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [791074581] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:31:46,515 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:31:46,515 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-06-05 04:31:46,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061299483] [2021-06-05 04:31:46,515 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:31:46,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:31:46,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:31:46,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:31:46,516 INFO L87 Difference]: Start difference. First operand 52 states and 100 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:31:46,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:31:46,720 INFO L93 Difference]: Finished difference Result 98 states and 183 transitions. [2021-06-05 04:31:46,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:31:46,720 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 04:31:46,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:31:46,721 INFO L225 Difference]: With dead ends: 98 [2021-06-05 04:31:46,721 INFO L226 Difference]: Without dead ends: 91 [2021-06-05 04:31:46,721 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 326.7ms TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:31:46,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-06-05 04:31:46,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 62. [2021-06-05 04:31:46,722 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 04:31:46,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 119 transitions. [2021-06-05 04:31:46,722 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 119 transitions. Word has length 16 [2021-06-05 04:31:46,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:31:46,723 INFO L482 AbstractCegarLoop]: Abstraction has 62 states and 119 transitions. [2021-06-05 04:31:46,723 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:31:46,723 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 119 transitions. [2021-06-05 04:31:46,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:31:46,723 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:31:46,723 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:31:46,940 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable262,47 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:31:46,941 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:31:46,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:31:46,941 INFO L82 PathProgramCache]: Analyzing trace with hash -1913206166, now seen corresponding path program 47 times [2021-06-05 04:31:46,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:31:46,941 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240187932] [2021-06-05 04:31:46,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:31:46,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:31:47,099 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 04:31:47,099 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:31:47,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240187932] [2021-06-05 04:31:47,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240187932] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:31:47,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1676716816] [2021-06-05 04:31:47,100 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:31:47,123 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:31:47,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:31:47,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:31:47,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:31:47,291 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:31:47,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:31:47,292 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:31:47,299 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:31:47,300 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:31:47,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 04:31:47,302 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:31:47,308 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:31:47,309 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:31:47,309 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:32, output treesize:13 [2021-06-05 04:31:47,345 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 04:31:47,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1676716816] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:31:47,346 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:31:47,346 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 04:31:47,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198613576] [2021-06-05 04:31:47,346 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:31:47,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:31:47,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:31:47,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:31:47,346 INFO L87 Difference]: Start difference. First operand 62 states and 119 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:31:47,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:31:47,530 INFO L93 Difference]: Finished difference Result 102 states and 191 transitions. [2021-06-05 04:31:47,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:31:47,531 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 04:31:47,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:31:47,531 INFO L225 Difference]: With dead ends: 102 [2021-06-05 04:31:47,531 INFO L226 Difference]: Without dead ends: 95 [2021-06-05 04:31:47,531 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 329.8ms TimeCoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:31:47,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-06-05 04:31:47,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 63. [2021-06-05 04:31:47,533 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 04:31:47,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 122 transitions. [2021-06-05 04:31:47,533 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 122 transitions. Word has length 16 [2021-06-05 04:31:47,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:31:47,533 INFO L482 AbstractCegarLoop]: Abstraction has 63 states and 122 transitions. [2021-06-05 04:31:47,533 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 04:31:47,533 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 122 transitions. [2021-06-05 04:31:47,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:31:47,534 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:31:47,534 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:31:47,755 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable270,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:31:47,756 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:31:47,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:31:47,756 INFO L82 PathProgramCache]: Analyzing trace with hash -1051201102, now seen corresponding path program 48 times [2021-06-05 04:31:47,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:31:47,756 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477999726] [2021-06-05 04:31:47,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:31:47,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:31:47,943 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 04:31:47,943 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:31:47,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477999726] [2021-06-05 04:31:47,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477999726] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:31:47,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503744689] [2021-06-05 04:31:47,943 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:31:47,966 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 04:31:47,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:31:47,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:31:47,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:31:48,150 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:31:48,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:31:48,151 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:31:48,158 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:31:48,159 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:31:48,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:31:48,161 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:31:48,167 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:31:48,168 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 04:31:48,168 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:32, output treesize:13 [2021-06-05 04:31:48,204 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:31:48,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1503744689] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:31:48,204 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:31:48,204 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 04:31:48,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133712972] [2021-06-05 04:31:48,204 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:31:48,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:31:48,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:31:48,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:31:48,205 INFO L87 Difference]: Start difference. First operand 63 states and 122 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:31:48,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:31:48,422 INFO L93 Difference]: Finished difference Result 103 states and 194 transitions. [2021-06-05 04:31:48,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:31:48,422 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 04:31:48,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:31:48,423 INFO L225 Difference]: With dead ends: 103 [2021-06-05 04:31:48,423 INFO L226 Difference]: Without dead ends: 96 [2021-06-05 04:31:48,423 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 350.2ms TimeCoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:31:48,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-06-05 04:31:48,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 64. [2021-06-05 04:31:48,424 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 04:31:48,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 125 transitions. [2021-06-05 04:31:48,425 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 125 transitions. Word has length 16 [2021-06-05 04:31:48,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:31:48,425 INFO L482 AbstractCegarLoop]: Abstraction has 64 states and 125 transitions. [2021-06-05 04:31:48,425 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 04:31:48,425 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 125 transitions. [2021-06-05 04:31:48,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:31:48,425 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:31:48,425 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:31:48,625 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable274,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:31:48,626 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:31:48,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:31:48,626 INFO L82 PathProgramCache]: Analyzing trace with hash 84984170, now seen corresponding path program 49 times [2021-06-05 04:31:48,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:31:48,626 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044464031] [2021-06-05 04:31:48,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:31:48,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:31:48,803 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 04:31:48,803 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:31:48,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044464031] [2021-06-05 04:31:48,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044464031] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:31:48,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005407396] [2021-06-05 04:31:48,804 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 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 04:31:48,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:31:48,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:31:48,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:31:49,007 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:31:49,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:31:49,009 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:31:49,030 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:31:49,032 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:31:49,033 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 10 treesize of output 6 [2021-06-05 04:31:49,034 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:31:49,054 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:31:49,058 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:31:49,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:31:49,059 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:31:49,079 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:31:49,082 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:31:49,082 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 13 treesize of output 9 [2021-06-05 04:31:49,083 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:31:49,102 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:31:49,103 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 04:31:49,103 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:77, output treesize:35 [2021-06-05 04:31:49,172 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 04:31:49,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2005407396] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:31:49,172 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:31:49,172 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 04:31:49,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225131719] [2021-06-05 04:31:49,172 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:31:49,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:31:49,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:31:49,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:31:49,173 INFO L87 Difference]: Start difference. First operand 64 states and 125 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:31:49,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:31:49,517 INFO L93 Difference]: Finished difference Result 109 states and 210 transitions. [2021-06-05 04:31:49,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:31:49,517 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 04:31:49,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:31:49,518 INFO L225 Difference]: With dead ends: 109 [2021-06-05 04:31:49,518 INFO L226 Difference]: Without dead ends: 100 [2021-06-05 04:31:49,518 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 456.5ms TimeCoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:31:49,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-06-05 04:31:49,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 65. [2021-06-05 04:31:49,519 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 04:31:49,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 128 transitions. [2021-06-05 04:31:49,519 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 128 transitions. Word has length 16 [2021-06-05 04:31:49,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:31:49,519 INFO L482 AbstractCegarLoop]: Abstraction has 65 states and 128 transitions. [2021-06-05 04:31:49,519 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 04:31:49,519 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 128 transitions. [2021-06-05 04:31:49,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:31:49,519 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:31:49,519 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:31:49,724 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable277 [2021-06-05 04:31:49,725 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:31:49,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:31:49,725 INFO L82 PathProgramCache]: Analyzing trace with hash 1938861990, now seen corresponding path program 50 times [2021-06-05 04:31:49,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:31:49,725 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245847176] [2021-06-05 04:31:49,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:31:49,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:31:49,857 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 04:31:49,858 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:31:49,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245847176] [2021-06-05 04:31:49,858 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245847176] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:31:49,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1004810234] [2021-06-05 04:31:49,858 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:31:49,886 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:31:49,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:31:49,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:31:49,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:31:50,035 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:31:50,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:31:50,036 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:31:50,043 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:31:50,045 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:31:50,045 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 10 treesize of output 6 [2021-06-05 04:31:50,047 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:31:50,053 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:31:50,054 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 04:31:50,054 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:32, output treesize:13 [2021-06-05 04:31:50,097 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 04:31:50,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1004810234] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:31:50,097 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:31:50,098 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 04:31:50,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927767577] [2021-06-05 04:31:50,098 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:31:50,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:31:50,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:31:50,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:31:50,099 INFO L87 Difference]: Start difference. First operand 65 states and 128 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:31:50,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:31:50,224 INFO L93 Difference]: Finished difference Result 83 states and 159 transitions. [2021-06-05 04:31:50,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:31:50,224 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 04:31:50,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:31:50,224 INFO L225 Difference]: With dead ends: 83 [2021-06-05 04:31:50,224 INFO L226 Difference]: Without dead ends: 76 [2021-06-05 04:31:50,225 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 256.1ms TimeCoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:31:50,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-06-05 04:31:50,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 67. [2021-06-05 04:31:50,229 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 04:31:50,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 133 transitions. [2021-06-05 04:31:50,230 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 133 transitions. Word has length 16 [2021-06-05 04:31:50,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:31:50,230 INFO L482 AbstractCegarLoop]: Abstraction has 67 states and 133 transitions. [2021-06-05 04:31:50,230 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 04:31:50,230 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 133 transitions. [2021-06-05 04:31:50,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:31:50,230 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:31:50,230 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:31:50,444 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable282,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:31:50,445 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:31:50,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:31:50,445 INFO L82 PathProgramCache]: Analyzing trace with hash -1494100242, now seen corresponding path program 51 times [2021-06-05 04:31:50,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:31:50,445 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251206121] [2021-06-05 04:31:50,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:31:50,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:31:50,626 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 04:31:50,627 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:31:50,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251206121] [2021-06-05 04:31:50,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251206121] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:31:50,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744748070] [2021-06-05 04:31:50,627 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:31:50,662 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 04:31:50,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:31:50,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:31:50,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:31:50,821 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:31:50,822 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 27 treesize of output 21 [2021-06-05 04:31:50,823 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:31:50,830 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:31:50,831 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:31:50,831 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 21 treesize of output 13 [2021-06-05 04:31:50,832 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:31:50,838 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:31:50,838 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 04:31:50,839 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:36, output treesize:13 [2021-06-05 04:31:50,872 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:31:50,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1744748070] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:31:50,872 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:31:50,872 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 04:31:50,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767548545] [2021-06-05 04:31:50,873 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:31:50,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:31:50,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:31:50,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:31:50,873 INFO L87 Difference]: Start difference. First operand 67 states and 133 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:31:51,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:31:51,114 INFO L93 Difference]: Finished difference Result 93 states and 181 transitions. [2021-06-05 04:31:51,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:31:51,114 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 04:31:51,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:31:51,115 INFO L225 Difference]: With dead ends: 93 [2021-06-05 04:31:51,115 INFO L226 Difference]: Without dead ends: 86 [2021-06-05 04:31:51,115 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 362.1ms TimeCoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:31:51,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-06-05 04:31:51,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 68. [2021-06-05 04:31:51,117 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 04:31:51,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 136 transitions. [2021-06-05 04:31:51,117 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 136 transitions. Word has length 16 [2021-06-05 04:31:51,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:31:51,117 INFO L482 AbstractCegarLoop]: Abstraction has 68 states and 136 transitions. [2021-06-05 04:31:51,117 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 04:31:51,117 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 136 transitions. [2021-06-05 04:31:51,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:31:51,117 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:31:51,117 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:31:51,324 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable286,52 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:31:51,325 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:31:51,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:31:51,325 INFO L82 PathProgramCache]: Analyzing trace with hash -357914970, now seen corresponding path program 52 times [2021-06-05 04:31:51,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:31:51,325 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005194367] [2021-06-05 04:31:51,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:31:51,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:31:51,520 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 04:31:51,520 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:31:51,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005194367] [2021-06-05 04:31:51,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005194367] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:31:51,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929599355] [2021-06-05 04:31:51,520 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:31:51,543 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:31:51,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:31:51,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:31:51,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:31:51,664 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:31:51,664 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 19 treesize of output 15 [2021-06-05 04:31:51,665 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:31:51,688 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:31:51,691 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:31:51,691 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 10 treesize of output 6 [2021-06-05 04:31:51,693 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:31:51,713 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:31:51,716 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:31:51,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:31:51,717 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:31:51,736 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:31:51,738 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:31:51,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:31:51,740 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:31:51,758 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:31:51,759 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 04:31:51,759 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:77, output treesize:35 [2021-06-05 04:31:51,827 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 04:31:51,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [929599355] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:31:51,827 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:31:51,827 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 04:31:51,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580834322] [2021-06-05 04:31:51,827 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:31:51,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:31:51,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:31:51,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:31:51,827 INFO L87 Difference]: Start difference. First operand 68 states and 136 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:31:52,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:31:52,083 INFO L93 Difference]: Finished difference Result 93 states and 183 transitions. [2021-06-05 04:31:52,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:31:52,083 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 04:31:52,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:31:52,083 INFO L225 Difference]: With dead ends: 93 [2021-06-05 04:31:52,083 INFO L226 Difference]: Without dead ends: 84 [2021-06-05 04:31:52,083 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 415.5ms TimeCoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:31:52,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-06-05 04:31:52,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 66. [2021-06-05 04:31:52,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 2.0) internal successors, (130), 65 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:31:52,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 130 transitions. [2021-06-05 04:31:52,085 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 130 transitions. Word has length 16 [2021-06-05 04:31:52,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:31:52,085 INFO L482 AbstractCegarLoop]: Abstraction has 66 states and 130 transitions. [2021-06-05 04:31:52,085 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 04:31:52,085 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 130 transitions. [2021-06-05 04:31:52,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:31:52,086 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:31:52,086 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:31:52,308 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable290,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:31:52,308 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:31:52,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:31:52,308 INFO L82 PathProgramCache]: Analyzing trace with hash 694082934, now seen corresponding path program 53 times [2021-06-05 04:31:52,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:31:52,308 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234425334] [2021-06-05 04:31:52,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:31:52,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:31:52,467 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 04:31:52,467 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:31:52,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234425334] [2021-06-05 04:31:52,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234425334] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:31:52,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978754325] [2021-06-05 04:31:52,467 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:31:52,497 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:31:52,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:31:52,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:31:52,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:31:52,637 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:31:52,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:31:52,638 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:31:52,645 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:31:52,648 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:31:52,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 04:31:52,650 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:31:52,657 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:31:52,658 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 04:31:52,658 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:32, output treesize:13 [2021-06-05 04:31:52,700 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 04:31:52,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [978754325] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:31:52,700 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:31:52,700 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 04:31:52,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572101200] [2021-06-05 04:31:52,700 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:31:52,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:31:52,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:31:52,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:31:52,701 INFO L87 Difference]: Start difference. First operand 66 states and 130 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:31:53,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:31:53,001 INFO L93 Difference]: Finished difference Result 86 states and 169 transitions. [2021-06-05 04:31:53,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:31:53,001 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 04:31:53,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:31:53,002 INFO L225 Difference]: With dead ends: 86 [2021-06-05 04:31:53,002 INFO L226 Difference]: Without dead ends: 79 [2021-06-05 04:31:53,002 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 356.7ms TimeCoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:31:53,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-06-05 04:31:53,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 70. [2021-06-05 04:31:53,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 2.0144927536231885) internal successors, (139), 69 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:31:53,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 139 transitions. [2021-06-05 04:31:53,004 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 139 transitions. Word has length 16 [2021-06-05 04:31:53,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:31:53,004 INFO L482 AbstractCegarLoop]: Abstraction has 70 states and 139 transitions. [2021-06-05 04:31:53,004 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 04:31:53,004 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 139 transitions. [2021-06-05 04:31:53,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:31:53,004 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:31:53,004 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:31:53,204 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable295,54 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:31:53,205 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:31:53,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:31:53,205 INFO L82 PathProgramCache]: Analyzing trace with hash 1830268206, now seen corresponding path program 54 times [2021-06-05 04:31:53,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:31:53,205 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945420183] [2021-06-05 04:31:53,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:31:53,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:31:53,369 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 04:31:53,369 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:31:53,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945420183] [2021-06-05 04:31:53,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945420183] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:31:53,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676570129] [2021-06-05 04:31:53,369 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:31:53,392 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:31:53,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:31:53,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:31:53,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:31:53,475 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:31:53,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:31:53,476 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:31:53,500 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:31:53,502 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:31:53,503 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 13 treesize of output 9 [2021-06-05 04:31:53,504 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:31:53,525 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:31:53,527 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:31:53,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:31:53,528 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:31:53,547 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:31:53,550 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:31:53,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 04:31:53,558 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:31:53,583 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:31:53,584 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 04:31:53,584 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:77, output treesize:35 [2021-06-05 04:31:53,654 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:31:53,655 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [676570129] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:31:53,655 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:31:53,655 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 04:31:53,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35842591] [2021-06-05 04:31:53,655 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:31:53,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:31:53,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:31:53,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:31:53,655 INFO L87 Difference]: Start difference. First operand 70 states and 139 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:31:54,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:31:54,042 INFO L93 Difference]: Finished difference Result 93 states and 183 transitions. [2021-06-05 04:31:54,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:31:54,042 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 04:31:54,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:31:54,043 INFO L225 Difference]: With dead ends: 93 [2021-06-05 04:31:54,043 INFO L226 Difference]: Without dead ends: 84 [2021-06-05 04:31:54,043 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 440.6ms TimeCoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:31:54,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-06-05 04:31:54,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 69. [2021-06-05 04:31:54,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 2.0) internal successors, (136), 68 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:31:54,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 136 transitions. [2021-06-05 04:31:54,045 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 136 transitions. Word has length 16 [2021-06-05 04:31:54,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:31:54,045 INFO L482 AbstractCegarLoop]: Abstraction has 69 states and 136 transitions. [2021-06-05 04:31:54,045 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 04:31:54,045 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 136 transitions. [2021-06-05 04:31:54,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:31:54,045 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:31:54,045 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:31:54,256 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable299 [2021-06-05 04:31:54,257 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:31:54,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:31:54,257 INFO L82 PathProgramCache]: Analyzing trace with hash -315902554, now seen corresponding path program 55 times [2021-06-05 04:31:54,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:31:54,257 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019791326] [2021-06-05 04:31:54,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:31:54,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:31:54,457 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 04:31:54,458 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:31:54,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019791326] [2021-06-05 04:31:54,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019791326] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:31:54,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037364813] [2021-06-05 04:31:54,458 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:31:54,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:31:54,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:31:54,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:31:54,541 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:31:54,542 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:31:54,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:31:54,543 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:31:54,545 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:31:54,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:31:54,546 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:31:54,568 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:31:54,571 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:31:54,571 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:31:54,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:31:54,573 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:31:54,576 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:31:54,576 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 10 treesize of output 6 [2021-06-05 04:31:54,578 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:31:54,598 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:31:54,599 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 04:31:54,599 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:35 [2021-06-05 04:31:54,672 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 04:31:54,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1037364813] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:31:54,673 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:31:54,673 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 04:31:54,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970696459] [2021-06-05 04:31:54,673 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:31:54,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:31:54,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:31:54,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:31:54,673 INFO L87 Difference]: Start difference. First operand 69 states and 136 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:31:55,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:31:55,048 INFO L93 Difference]: Finished difference Result 94 states and 188 transitions. [2021-06-05 04:31:55,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:31:55,048 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 04:31:55,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:31:55,048 INFO L225 Difference]: With dead ends: 94 [2021-06-05 04:31:55,048 INFO L226 Difference]: Without dead ends: 85 [2021-06-05 04:31:55,048 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 489.6ms TimeCoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:31:55,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-06-05 04:31:55,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 70. [2021-06-05 04:31:55,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 2.0144927536231885) internal successors, (139), 69 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:31:55,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 139 transitions. [2021-06-05 04:31:55,050 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 139 transitions. Word has length 16 [2021-06-05 04:31:55,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:31:55,050 INFO L482 AbstractCegarLoop]: Abstraction has 70 states and 139 transitions. [2021-06-05 04:31:55,050 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 04:31:55,050 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 139 transitions. [2021-06-05 04:31:55,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:31:55,051 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:31:55,051 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:31:55,251 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable304,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:31:55,251 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:31:55,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:31:55,251 INFO L82 PathProgramCache]: Analyzing trace with hash 1093890538, now seen corresponding path program 56 times [2021-06-05 04:31:55,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:31:55,251 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000022691] [2021-06-05 04:31:55,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:31:55,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:31:55,383 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 04:31:55,383 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:31:55,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000022691] [2021-06-05 04:31:55,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000022691] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:31:55,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383851835] [2021-06-05 04:31:55,383 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:31:55,407 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:31:55,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:31:55,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:31:55,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:31:55,565 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:31:55,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 04:31:55,567 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:31:55,575 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:31:55,578 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:31:55,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:31:55,580 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:31:55,588 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:31:55,589 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 04:31:55,589 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:36, output treesize:13 [2021-06-05 04:31:55,635 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 04:31:55,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [383851835] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:31:55,635 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:31:55,635 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 04:31:55,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131059181] [2021-06-05 04:31:55,636 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:31:55,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:31:55,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:31:55,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:31:55,636 INFO L87 Difference]: Start difference. First operand 70 states and 139 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:31:55,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:31:55,819 INFO L93 Difference]: Finished difference Result 89 states and 171 transitions. [2021-06-05 04:31:55,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:31:55,819 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 04:31:55,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:31:55,820 INFO L225 Difference]: With dead ends: 89 [2021-06-05 04:31:55,820 INFO L226 Difference]: Without dead ends: 82 [2021-06-05 04:31:55,820 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 285.4ms TimeCoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:31:55,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-06-05 04:31:55,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 71. [2021-06-05 04:31:55,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 2.0285714285714285) internal successors, (142), 70 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:31:55,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 142 transitions. [2021-06-05 04:31:55,822 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 142 transitions. Word has length 16 [2021-06-05 04:31:55,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:31:55,822 INFO L482 AbstractCegarLoop]: Abstraction has 71 states and 142 transitions. [2021-06-05 04:31:55,822 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 04:31:55,822 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 142 transitions. [2021-06-05 04:31:55,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:31:55,822 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:31:55,823 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:31:56,028 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable307,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:31:56,029 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:31:56,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:31:56,029 INFO L82 PathProgramCache]: Analyzing trace with hash 1955895602, now seen corresponding path program 57 times [2021-06-05 04:31:56,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:31:56,029 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639450501] [2021-06-05 04:31:56,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:31:56,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:31:56,201 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 04:31:56,201 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:31:56,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639450501] [2021-06-05 04:31:56,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639450501] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:31:56,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052323115] [2021-06-05 04:31:56,202 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:31:56,230 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 04:31:56,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:31:56,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:31:56,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:31:56,400 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:31:56,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:31:56,401 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:31:56,407 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:31:56,408 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:31:56,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:31:56,410 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:31:56,415 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:31:56,416 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:31:56,416 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:32, output treesize:13 [2021-06-05 04:31:56,457 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 04:31:56,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2052323115] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:31:56,458 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:31:56,458 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 04:31:56,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262108872] [2021-06-05 04:31:56,458 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:31:56,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:31:56,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:31:56,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:31:56,458 INFO L87 Difference]: Start difference. First operand 71 states and 142 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:31:56,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:31:56,742 INFO L93 Difference]: Finished difference Result 99 states and 193 transitions. [2021-06-05 04:31:56,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:31:56,743 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 04:31:56,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:31:56,743 INFO L225 Difference]: With dead ends: 99 [2021-06-05 04:31:56,743 INFO L226 Difference]: Without dead ends: 92 [2021-06-05 04:31:56,743 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 384.4ms TimeCoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:31:56,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-06-05 04:31:56,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 72. [2021-06-05 04:31:56,746 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 04:31:56,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 145 transitions. [2021-06-05 04:31:56,746 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 145 transitions. Word has length 16 [2021-06-05 04:31:56,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:31:56,746 INFO L482 AbstractCegarLoop]: Abstraction has 72 states and 145 transitions. [2021-06-05 04:31:56,747 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 04:31:56,747 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 145 transitions. [2021-06-05 04:31:56,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:31:56,747 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:31:56,747 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:31:56,960 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable310,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:31:56,961 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:31:56,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:31:56,961 INFO L82 PathProgramCache]: Analyzing trace with hash -1202886422, now seen corresponding path program 58 times [2021-06-05 04:31:56,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:31:56,961 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003361237] [2021-06-05 04:31:56,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:31:56,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:31:57,178 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 04:31:57,179 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:31:57,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003361237] [2021-06-05 04:31:57,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003361237] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:31:57,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91770635] [2021-06-05 04:31:57,179 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 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 04:31:57,202 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:31:57,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:31:57,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:31:57,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:31:57,327 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:31:57,328 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 19 treesize of output 15 [2021-06-05 04:31:57,328 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:31:57,349 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:31:57,352 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:31:57,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 04:31:57,355 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:31:57,375 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:31:57,377 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:31:57,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:31:57,378 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:31:57,397 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:31:57,399 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:31:57,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:31:57,401 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:31:57,419 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:31:57,420 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:31:57,420 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:77, output treesize:35 [2021-06-05 04:31:57,499 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 04:31:57,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [91770635] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:31:57,499 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:31:57,499 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 04:31:57,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238831999] [2021-06-05 04:31:57,500 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:31:57,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:31:57,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:31:57,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:31:57,500 INFO L87 Difference]: Start difference. First operand 72 states and 145 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:31:57,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:31:57,834 INFO L93 Difference]: Finished difference Result 100 states and 197 transitions. [2021-06-05 04:31:57,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:31:57,834 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 04:31:57,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:31:57,834 INFO L225 Difference]: With dead ends: 100 [2021-06-05 04:31:57,834 INFO L226 Difference]: Without dead ends: 91 [2021-06-05 04:31:57,835 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 464.7ms TimeCoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:31:57,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-06-05 04:31:57,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 69. [2021-06-05 04:31:57,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 2.014705882352941) internal successors, (137), 68 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:31:57,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 137 transitions. [2021-06-05 04:31:57,836 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 137 transitions. Word has length 16 [2021-06-05 04:31:57,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:31:57,836 INFO L482 AbstractCegarLoop]: Abstraction has 69 states and 137 transitions. [2021-06-05 04:31:57,836 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 04:31:57,836 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 137 transitions. [2021-06-05 04:31:57,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:31:57,837 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:31:57,837 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:31:58,040 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable313 [2021-06-05 04:31:58,041 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:31:58,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:31:58,051 INFO L82 PathProgramCache]: Analyzing trace with hash -1036686798, now seen corresponding path program 59 times [2021-06-05 04:31:58,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:31:58,051 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972082181] [2021-06-05 04:31:58,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:31:58,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:31:58,209 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 04:31:58,209 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:31:58,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972082181] [2021-06-05 04:31:58,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972082181] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:31:58,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247055076] [2021-06-05 04:31:58,209 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:31:58,243 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:31:58,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:31:58,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:31:58,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:31:58,373 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:31:58,373 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 27 treesize of output 21 [2021-06-05 04:31:58,374 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:31:58,380 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:31:58,381 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:31:58,382 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 21 treesize of output 13 [2021-06-05 04:31:58,382 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:31:58,388 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:31:58,389 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:31:58,389 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:36, output treesize:13 [2021-06-05 04:31:58,422 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 04:31:58,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1247055076] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:31:58,422 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:31:58,422 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 04:31:58,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151207556] [2021-06-05 04:31:58,422 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:31:58,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:31:58,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:31:58,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:31:58,423 INFO L87 Difference]: Start difference. First operand 69 states and 137 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:31:58,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:31:58,615 INFO L93 Difference]: Finished difference Result 91 states and 179 transitions. [2021-06-05 04:31:58,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:31:58,616 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 04:31:58,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:31:58,616 INFO L225 Difference]: With dead ends: 91 [2021-06-05 04:31:58,616 INFO L226 Difference]: Without dead ends: 84 [2021-06-05 04:31:58,616 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 282.2ms TimeCoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:31:58,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-06-05 04:31:58,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 72. [2021-06-05 04:31:58,617 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 04:31:58,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 144 transitions. [2021-06-05 04:31:58,617 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 144 transitions. Word has length 16 [2021-06-05 04:31:58,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:31:58,618 INFO L482 AbstractCegarLoop]: Abstraction has 72 states and 144 transitions. [2021-06-05 04:31:58,618 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 04:31:58,618 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 144 transitions. [2021-06-05 04:31:58,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:31:58,618 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:31:58,618 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:31:58,818 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable318,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:31:58,819 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:31:58,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:31:58,819 INFO L82 PathProgramCache]: Analyzing trace with hash 99498474, now seen corresponding path program 60 times [2021-06-05 04:31:58,819 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:31:58,819 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956249360] [2021-06-05 04:31:58,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:31:58,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:31:58,994 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 04:31:58,994 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:31:58,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956249360] [2021-06-05 04:31:58,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956249360] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:31:58,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238901052] [2021-06-05 04:31:58,995 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:31:59,047 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:31:59,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:31:59,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:31:59,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:31:59,118 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:31:59,118 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:31:59,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:31:59,119 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:31:59,125 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:31:59,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:31:59,127 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:31:59,149 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:31:59,152 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:31:59,152 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:31:59,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 04:31:59,154 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:31:59,156 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:31:59,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:31:59,158 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:31:59,178 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:31:59,179 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:31:59,179 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:35 [2021-06-05 04:31:59,280 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 04:31:59,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1238901052] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:31:59,280 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:31:59,280 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 04:31:59,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789288591] [2021-06-05 04:31:59,281 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:31:59,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:31:59,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:31:59,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:31:59,281 INFO L87 Difference]: Start difference. First operand 72 states and 144 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:31:59,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:31:59,526 INFO L93 Difference]: Finished difference Result 95 states and 186 transitions. [2021-06-05 04:31:59,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:31:59,526 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 04:31:59,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:31:59,527 INFO L225 Difference]: With dead ends: 95 [2021-06-05 04:31:59,527 INFO L226 Difference]: Without dead ends: 88 [2021-06-05 04:31:59,527 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 310.0ms TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:31:59,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-06-05 04:31:59,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 73. [2021-06-05 04:31:59,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 2.0555555555555554) internal successors, (148), 72 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:31:59,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 148 transitions. [2021-06-05 04:31:59,529 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 148 transitions. Word has length 16 [2021-06-05 04:31:59,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:31:59,529 INFO L482 AbstractCegarLoop]: Abstraction has 73 states and 148 transitions. [2021-06-05 04:31:59,529 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 04:31:59,529 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 148 transitions. [2021-06-05 04:31:59,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:31:59,529 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:31:59,530 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:31:59,753 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable322 [2021-06-05 04:31:59,753 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:31:59,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:31:59,753 INFO L82 PathProgramCache]: Analyzing trace with hash -2046672286, now seen corresponding path program 61 times [2021-06-05 04:31:59,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:31:59,753 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278567210] [2021-06-05 04:31:59,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:31:59,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:31:59,933 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 04:31:59,933 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:31:59,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278567210] [2021-06-05 04:31:59,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278567210] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:31:59,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477883335] [2021-06-05 04:31:59,933 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:31:59,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:31:59,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:31:59,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:32:00,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:00,051 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:00,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:32:00,053 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:32:00,056 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:00,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:32:00,057 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:32:00,080 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:32:00,083 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:00,084 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:00,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 04:32:00,087 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:32:00,090 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:00,090 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 13 treesize of output 9 [2021-06-05 04:32:00,092 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:32:00,113 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:32:00,115 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 04:32:00,115 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:35 [2021-06-05 04:32:00,191 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 04:32:00,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [477883335] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:00,192 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:32:00,192 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 04:32:00,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523519837] [2021-06-05 04:32:00,193 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:32:00,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:32:00,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:32:00,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:32:00,193 INFO L87 Difference]: Start difference. First operand 73 states and 148 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:00,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:32:00,574 INFO L93 Difference]: Finished difference Result 98 states and 199 transitions. [2021-06-05 04:32:00,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:32:00,574 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 16 [2021-06-05 04:32:00,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:32:00,575 INFO L225 Difference]: With dead ends: 98 [2021-06-05 04:32:00,575 INFO L226 Difference]: Without dead ends: 89 [2021-06-05 04:32:00,575 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 498.8ms TimeCoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:32:00,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-06-05 04:32:00,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 73. [2021-06-05 04:32:00,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 2.0555555555555554) internal successors, (148), 72 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:00,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 148 transitions. [2021-06-05 04:32:00,576 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 148 transitions. Word has length 16 [2021-06-05 04:32:00,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:32:00,576 INFO L482 AbstractCegarLoop]: Abstraction has 73 states and 148 transitions. [2021-06-05 04:32:00,576 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 04:32:00,576 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 148 transitions. [2021-06-05 04:32:00,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:32:00,577 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:32:00,577 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:32:00,780 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable327,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:32:00,781 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:32:00,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:32:00,781 INFO L82 PathProgramCache]: Analyzing trace with hash 141510890, now seen corresponding path program 62 times [2021-06-05 04:32:00,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:32:00,781 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805859897] [2021-06-05 04:32:00,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:32:00,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:32:00,922 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 04:32:00,922 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:32:00,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805859897] [2021-06-05 04:32:00,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805859897] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:00,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531991963] [2021-06-05 04:32:00,923 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:32:00,952 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:32:00,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:32:00,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:32:00,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:32:01,034 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:01,034 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:01,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:32:01,035 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:32:01,038 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:01,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:32:01,038 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:32:01,060 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:32:01,063 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:01,063 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:01,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:32:01,065 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:32:01,067 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:01,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:32:01,069 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:32:01,088 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:32:01,089 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 04:32:01,090 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:35 [2021-06-05 04:32:01,168 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 04:32:01,168 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1531991963] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:01,168 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:32:01,168 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 04:32:01,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392354051] [2021-06-05 04:32:01,169 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:32:01,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:32:01,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:32:01,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:32:01,169 INFO L87 Difference]: Start difference. First operand 73 states and 148 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:01,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:32:01,343 INFO L93 Difference]: Finished difference Result 103 states and 201 transitions. [2021-06-05 04:32:01,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:32:01,344 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 04:32:01,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:32:01,344 INFO L225 Difference]: With dead ends: 103 [2021-06-05 04:32:01,344 INFO L226 Difference]: Without dead ends: 89 [2021-06-05 04:32:01,344 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 286.4ms TimeCoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:32:01,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-06-05 04:32:01,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 77. [2021-06-05 04:32:01,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 2.0657894736842106) internal successors, (157), 76 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:01,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 157 transitions. [2021-06-05 04:32:01,346 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 157 transitions. Word has length 16 [2021-06-05 04:32:01,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:32:01,346 INFO L482 AbstractCegarLoop]: Abstraction has 77 states and 157 transitions. [2021-06-05 04:32:01,346 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 04:32:01,346 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 157 transitions. [2021-06-05 04:32:01,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:32:01,346 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:32:01,346 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:32:01,556 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable330,63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:32:01,557 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:32:01,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:32:01,557 INFO L82 PathProgramCache]: Analyzing trace with hash 245268066, now seen corresponding path program 63 times [2021-06-05 04:32:01,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:32:01,557 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245463435] [2021-06-05 04:32:01,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:32:01,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:32:01,691 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 04:32:01,691 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:32:01,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245463435] [2021-06-05 04:32:01,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245463435] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:01,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634255298] [2021-06-05 04:32:01,691 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:32:01,726 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 04:32:01,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:32:01,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:32:01,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:32:01,846 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:01,847 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 27 treesize of output 21 [2021-06-05 04:32:01,848 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:32:01,856 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:32:01,858 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:01,858 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 21 treesize of output 13 [2021-06-05 04:32:01,859 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:32:01,867 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:32:01,868 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:32:01,868 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:38, output treesize:13 [2021-06-05 04:32:01,913 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 04:32:01,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [634255298] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:01,913 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:32:01,914 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 04:32:01,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049516550] [2021-06-05 04:32:01,914 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:32:01,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:32:01,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:32:01,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:32:01,914 INFO L87 Difference]: Start difference. First operand 77 states and 157 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:02,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:32:02,048 INFO L93 Difference]: Finished difference Result 97 states and 191 transitions. [2021-06-05 04:32:02,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:32:02,049 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 04:32:02,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:32:02,049 INFO L225 Difference]: With dead ends: 97 [2021-06-05 04:32:02,049 INFO L226 Difference]: Without dead ends: 90 [2021-06-05 04:32:02,049 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 266.0ms TimeCoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:32:02,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-06-05 04:32:02,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 78. [2021-06-05 04:32:02,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 2.0779220779220777) internal successors, (160), 77 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:02,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 160 transitions. [2021-06-05 04:32:02,051 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 160 transitions. Word has length 16 [2021-06-05 04:32:02,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:32:02,051 INFO L482 AbstractCegarLoop]: Abstraction has 78 states and 160 transitions. [2021-06-05 04:32:02,051 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 04:32:02,051 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 160 transitions. [2021-06-05 04:32:02,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:32:02,051 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:32:02,051 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:32:02,252 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable335,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:32:02,252 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:32:02,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:32:02,252 INFO L82 PathProgramCache]: Analyzing trace with hash 1107273130, now seen corresponding path program 64 times [2021-06-05 04:32:02,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:32:02,252 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514878356] [2021-06-05 04:32:02,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:32:02,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:32:02,405 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 04:32:02,406 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:32:02,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514878356] [2021-06-05 04:32:02,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514878356] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:02,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457548436] [2021-06-05 04:32:02,406 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:32:02,438 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:32:02,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:32:02,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:32:02,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:32:02,572 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:02,573 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 27 treesize of output 21 [2021-06-05 04:32:02,574 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:32:02,582 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:32:02,584 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:02,587 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 21 treesize of output 13 [2021-06-05 04:32:02,588 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:32:02,595 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:32:02,596 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 04:32:02,596 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:38, output treesize:13 [2021-06-05 04:32:02,634 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 04:32:02,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [457548436] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:02,634 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:32:02,635 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 04:32:02,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651035883] [2021-06-05 04:32:02,635 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:32:02,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:32:02,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:32:02,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:32:02,635 INFO L87 Difference]: Start difference. First operand 78 states and 160 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:02,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:32:02,845 INFO L93 Difference]: Finished difference Result 107 states and 213 transitions. [2021-06-05 04:32:02,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:32:02,845 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 04:32:02,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:32:02,846 INFO L225 Difference]: With dead ends: 107 [2021-06-05 04:32:02,846 INFO L226 Difference]: Without dead ends: 100 [2021-06-05 04:32:02,846 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 338.5ms TimeCoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:32:02,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-06-05 04:32:02,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 79. [2021-06-05 04:32:02,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 2.08974358974359) internal successors, (163), 78 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:02,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 163 transitions. [2021-06-05 04:32:02,847 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 163 transitions. Word has length 16 [2021-06-05 04:32:02,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:32:02,848 INFO L482 AbstractCegarLoop]: Abstraction has 79 states and 163 transitions. [2021-06-05 04:32:02,848 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 04:32:02,848 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 163 transitions. [2021-06-05 04:32:02,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:32:02,848 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:32:02,848 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:32:03,048 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable336 [2021-06-05 04:32:03,048 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:32:03,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:32:03,049 INFO L82 PathProgramCache]: Analyzing trace with hash -2051508894, now seen corresponding path program 65 times [2021-06-05 04:32:03,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:32:03,049 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860136478] [2021-06-05 04:32:03,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:32:03,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:32:03,281 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 04:32:03,281 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:32:03,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860136478] [2021-06-05 04:32:03,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860136478] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:03,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901150297] [2021-06-05 04:32:03,281 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 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 04:32:03,304 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:32:03,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:32:03,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:32:03,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:32:03,378 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:03,379 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:03,379 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 19 treesize of output 15 [2021-06-05 04:32:03,380 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:32:03,382 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:03,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:32:03,383 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:32:03,404 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:32:03,406 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:03,407 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:03,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:32:03,408 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:32:03,410 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:03,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 04:32:03,412 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:32:03,432 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:32:03,433 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 04:32:03,433 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:35 [2021-06-05 04:32:03,544 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 04:32:03,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1901150297] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:03,544 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:32:03,544 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 04:32:03,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981022817] [2021-06-05 04:32:03,544 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:32:03,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:32:03,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:32:03,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:32:03,545 INFO L87 Difference]: Start difference. First operand 79 states and 163 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:03,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:32:03,882 INFO L93 Difference]: Finished difference Result 105 states and 210 transitions. [2021-06-05 04:32:03,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:32:03,883 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 04:32:03,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:32:03,883 INFO L225 Difference]: With dead ends: 105 [2021-06-05 04:32:03,883 INFO L226 Difference]: Without dead ends: 98 [2021-06-05 04:32:03,883 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 462.0ms TimeCoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:32:03,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-06-05 04:32:03,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 78. [2021-06-05 04:32:03,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 2.0779220779220777) internal successors, (160), 77 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:03,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 160 transitions. [2021-06-05 04:32:03,885 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 160 transitions. Word has length 16 [2021-06-05 04:32:03,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:32:03,885 INFO L482 AbstractCegarLoop]: Abstraction has 78 states and 160 transitions. [2021-06-05 04:32:03,885 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 04:32:03,885 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 160 transitions. [2021-06-05 04:32:03,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:32:03,886 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:32:03,886 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:32:04,089 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable337 [2021-06-05 04:32:04,089 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:32:04,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:32:04,089 INFO L82 PathProgramCache]: Analyzing trace with hash -999510990, now seen corresponding path program 66 times [2021-06-05 04:32:04,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:32:04,089 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548462615] [2021-06-05 04:32:04,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:32:04,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:32:04,251 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 04:32:04,251 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:32:04,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548462615] [2021-06-05 04:32:04,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548462615] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:04,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [243109242] [2021-06-05 04:32:04,251 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 04:32:04,280 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 04:32:04,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:32:04,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:32:04,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:32:04,370 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:04,370 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 27 treesize of output 21 [2021-06-05 04:32:04,372 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:32:04,379 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:32:04,380 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:04,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 04:32:04,381 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:32:04,387 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:32:04,388 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:32:04,388 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:38, output treesize:13 [2021-06-05 04:32:04,419 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 04:32:04,420 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [243109242] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:04,420 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:32:04,420 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 04:32:04,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898939346] [2021-06-05 04:32:04,420 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:32:04,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:32:04,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:32:04,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:32:04,421 INFO L87 Difference]: Start difference. First operand 78 states and 160 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:04,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:32:04,675 INFO L93 Difference]: Finished difference Result 99 states and 200 transitions. [2021-06-05 04:32:04,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:32:04,675 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 04:32:04,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:32:04,676 INFO L225 Difference]: With dead ends: 99 [2021-06-05 04:32:04,676 INFO L226 Difference]: Without dead ends: 92 [2021-06-05 04:32:04,676 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 322.7ms TimeCoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:32:04,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-06-05 04:32:04,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 80. [2021-06-05 04:32:04,677 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 04:32:04,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 165 transitions. [2021-06-05 04:32:04,677 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 165 transitions. Word has length 16 [2021-06-05 04:32:04,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:32:04,677 INFO L482 AbstractCegarLoop]: Abstraction has 80 states and 165 transitions. [2021-06-05 04:32:04,677 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 04:32:04,677 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 165 transitions. [2021-06-05 04:32:04,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:32:04,677 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:32:04,677 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:32:04,878 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable342 [2021-06-05 04:32:04,878 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:32:04,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:32:04,878 INFO L82 PathProgramCache]: Analyzing trace with hash 136674282, now seen corresponding path program 67 times [2021-06-05 04:32:04,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:32:04,878 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114517304] [2021-06-05 04:32:04,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:32:04,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:32:05,037 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 04:32:05,037 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:32:05,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114517304] [2021-06-05 04:32:05,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114517304] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:05,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200945468] [2021-06-05 04:32:05,038 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:32:05,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:32:05,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:32:05,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:32:05,139 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:05,139 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:05,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:32:05,140 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:32:05,142 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:05,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:32:05,144 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:32:05,165 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:32:05,167 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:05,168 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:05,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:32:05,169 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:32:05,171 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:05,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:32:05,173 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:32:05,193 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:32:05,194 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 04:32:05,194 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:35 [2021-06-05 04:32:05,268 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 04:32:05,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1200945468] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:05,268 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:32:05,268 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 04:32:05,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121434929] [2021-06-05 04:32:05,269 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:32:05,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:32:05,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:32:05,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:32:05,269 INFO L87 Difference]: Start difference. First operand 80 states and 165 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:05,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:32:05,585 INFO L93 Difference]: Finished difference Result 105 states and 212 transitions. [2021-06-05 04:32:05,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:32:05,585 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 16 [2021-06-05 04:32:05,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:32:05,585 INFO L225 Difference]: With dead ends: 105 [2021-06-05 04:32:05,586 INFO L226 Difference]: Without dead ends: 96 [2021-06-05 04:32:05,586 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 418.8ms TimeCoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:32:05,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-06-05 04:32:05,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 79. [2021-06-05 04:32:05,587 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 04:32:05,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 162 transitions. [2021-06-05 04:32:05,587 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 162 transitions. Word has length 16 [2021-06-05 04:32:05,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:32:05,587 INFO L482 AbstractCegarLoop]: Abstraction has 79 states and 162 transitions. [2021-06-05 04:32:05,587 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 04:32:05,587 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 162 transitions. [2021-06-05 04:32:05,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:32:05,587 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:32:05,587 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:32:05,788 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable343,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:32:05,788 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:32:05,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:32:05,788 INFO L82 PathProgramCache]: Analyzing trace with hash -2009496478, now seen corresponding path program 68 times [2021-06-05 04:32:05,788 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:32:05,788 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528305501] [2021-06-05 04:32:05,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:32:05,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:32:05,919 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 04:32:05,919 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:32:05,919 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528305501] [2021-06-05 04:32:05,919 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528305501] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:05,919 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380453511] [2021-06-05 04:32:05,919 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:32:05,952 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:32:05,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:32:05,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:32:05,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:32:06,029 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:06,029 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:06,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:32:06,030 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:32:06,033 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:06,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:32:06,034 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:32:06,060 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:32:06,063 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:06,064 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:06,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:32:06,066 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:32:06,068 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:06,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:32:06,070 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:32:06,094 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:32:06,095 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 04:32:06,095 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:35 [2021-06-05 04:32:06,177 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 04:32:06,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1380453511] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:06,178 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:32:06,178 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 04:32:06,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355227216] [2021-06-05 04:32:06,178 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:32:06,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:32:06,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:32:06,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:32:06,178 INFO L87 Difference]: Start difference. First operand 79 states and 162 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:06,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:32:06,738 INFO L93 Difference]: Finished difference Result 148 states and 284 transitions. [2021-06-05 04:32:06,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:32:06,738 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 04:32:06,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:32:06,739 INFO L225 Difference]: With dead ends: 148 [2021-06-05 04:32:06,739 INFO L226 Difference]: Without dead ends: 125 [2021-06-05 04:32:06,739 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 542.1ms TimeCoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:32:06,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-06-05 04:32:06,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 83. [2021-06-05 04:32:06,740 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 04:32:06,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 176 transitions. [2021-06-05 04:32:06,741 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 176 transitions. Word has length 16 [2021-06-05 04:32:06,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:32:06,741 INFO L482 AbstractCegarLoop]: Abstraction has 83 states and 176 transitions. [2021-06-05 04:32:06,741 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 04:32:06,741 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 176 transitions. [2021-06-05 04:32:06,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:32:06,741 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:32:06,741 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:32:06,963 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable346 [2021-06-05 04:32:06,963 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:32:06,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:32:06,964 INFO L82 PathProgramCache]: Analyzing trace with hash -1885309270, now seen corresponding path program 69 times [2021-06-05 04:32:06,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:32:06,964 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710934904] [2021-06-05 04:32:06,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:32:06,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:32:07,112 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 04:32:07,112 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:32:07,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710934904] [2021-06-05 04:32:07,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710934904] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:07,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [242200110] [2021-06-05 04:32:07,113 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:32:07,141 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:32:07,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:32:07,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:32:07,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:32:07,247 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:07,247 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:07,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:32:07,248 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:32:07,251 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:07,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:32:07,252 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:32:07,270 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:32:07,272 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:07,272 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:07,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:32:07,274 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:32:07,276 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:07,276 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 13 treesize of output 9 [2021-06-05 04:32:07,277 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:32:07,294 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:32:07,295 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 04:32:07,295 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:71, output treesize:29 [2021-06-05 04:32:07,342 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 04:32:07,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [242200110] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:07,342 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:32:07,342 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 04:32:07,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102767083] [2021-06-05 04:32:07,342 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:32:07,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:32:07,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:32:07,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:32:07,343 INFO L87 Difference]: Start difference. First operand 83 states and 176 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:07,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:32:07,626 INFO L93 Difference]: Finished difference Result 105 states and 215 transitions. [2021-06-05 04:32:07,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:32:07,626 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 04:32:07,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:32:07,626 INFO L225 Difference]: With dead ends: 105 [2021-06-05 04:32:07,627 INFO L226 Difference]: Without dead ends: 92 [2021-06-05 04:32:07,627 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 351.1ms TimeCoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:32:07,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-06-05 04:32:07,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 86. [2021-06-05 04:32:07,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 2.1411764705882352) internal successors, (182), 85 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:07,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 182 transitions. [2021-06-05 04:32:07,628 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 182 transitions. Word has length 16 [2021-06-05 04:32:07,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:32:07,628 INFO L482 AbstractCegarLoop]: Abstraction has 86 states and 182 transitions. [2021-06-05 04:32:07,628 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 04:32:07,628 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 182 transitions. [2021-06-05 04:32:07,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:32:07,628 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:32:07,628 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:32:07,829 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable349 [2021-06-05 04:32:07,829 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:32:07,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:32:07,829 INFO L82 PathProgramCache]: Analyzing trace with hash -749123998, now seen corresponding path program 70 times [2021-06-05 04:32:07,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:32:07,829 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139770603] [2021-06-05 04:32:07,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:32:07,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:32:07,999 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 04:32:07,999 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:32:07,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139770603] [2021-06-05 04:32:07,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139770603] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:07,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407501121] [2021-06-05 04:32:07,999 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:32:08,021 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:32:08,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:32:08,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:32:08,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:32:08,100 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:08,100 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:08,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:32:08,101 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:32:08,103 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:08,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:32:08,104 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:32:08,125 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:32:08,127 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:08,128 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:08,128 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 13 treesize of output 9 [2021-06-05 04:32:08,129 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:32:08,132 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:08,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:32:08,133 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:32:08,159 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:32:08,160 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 04:32:08,160 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:35 [2021-06-05 04:32:08,226 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 04:32:08,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [407501121] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:08,226 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:32:08,226 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 04:32:08,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90913772] [2021-06-05 04:32:08,227 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:32:08,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:32:08,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:32:08,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:32:08,227 INFO L87 Difference]: Start difference. First operand 86 states and 182 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:08,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:32:08,545 INFO L93 Difference]: Finished difference Result 105 states and 219 transitions. [2021-06-05 04:32:08,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:32:08,545 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 04:32:08,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:32:08,545 INFO L225 Difference]: With dead ends: 105 [2021-06-05 04:32:08,545 INFO L226 Difference]: Without dead ends: 96 [2021-06-05 04:32:08,545 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 396.3ms TimeCoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:32:08,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-06-05 04:32:08,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 86. [2021-06-05 04:32:08,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 2.1411764705882352) internal successors, (182), 85 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:08,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 182 transitions. [2021-06-05 04:32:08,547 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 182 transitions. Word has length 16 [2021-06-05 04:32:08,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:32:08,547 INFO L482 AbstractCegarLoop]: Abstraction has 86 states and 182 transitions. [2021-06-05 04:32:08,547 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 04:32:08,547 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 182 transitions. [2021-06-05 04:32:08,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:32:08,547 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:32:08,547 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:32:08,747 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable352 [2021-06-05 04:32:08,748 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:32:08,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:32:08,748 INFO L82 PathProgramCache]: Analyzing trace with hash 1399672538, now seen corresponding path program 71 times [2021-06-05 04:32:08,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:32:08,748 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953323495] [2021-06-05 04:32:08,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:32:08,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:32:08,923 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 04:32:08,923 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:32:08,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953323495] [2021-06-05 04:32:08,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953323495] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:08,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253796286] [2021-06-05 04:32:08,923 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:32:08,946 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:32:08,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:32:08,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:32:08,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:32:09,014 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:09,014 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:09,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:32:09,015 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:32:09,017 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:09,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:32:09,018 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:32:09,057 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:32:09,059 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:09,060 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:09,060 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 13 treesize of output 9 [2021-06-05 04:32:09,061 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:32:09,063 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:09,063 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 13 treesize of output 9 [2021-06-05 04:32:09,065 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:32:09,085 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:32:09,086 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 04:32:09,086 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:35 [2021-06-05 04:32:09,174 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 04:32:09,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1253796286] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:09,175 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:32:09,175 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 04:32:09,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235442144] [2021-06-05 04:32:09,175 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:32:09,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:32:09,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:32:09,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:32:09,176 INFO L87 Difference]: Start difference. First operand 86 states and 182 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:09,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:32:09,541 INFO L93 Difference]: Finished difference Result 112 states and 235 transitions. [2021-06-05 04:32:09,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:32:09,541 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 04:32:09,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:32:09,542 INFO L225 Difference]: With dead ends: 112 [2021-06-05 04:32:09,542 INFO L226 Difference]: Without dead ends: 103 [2021-06-05 04:32:09,542 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 471.7ms TimeCoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:32:09,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-06-05 04:32:09,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 86. [2021-06-05 04:32:09,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 2.1411764705882352) internal successors, (182), 85 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:09,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 182 transitions. [2021-06-05 04:32:09,543 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 182 transitions. Word has length 16 [2021-06-05 04:32:09,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:32:09,544 INFO L482 AbstractCegarLoop]: Abstraction has 86 states and 182 transitions. [2021-06-05 04:32:09,544 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:09,544 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 182 transitions. [2021-06-05 04:32:09,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:32:09,544 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:32:09,544 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:32:09,753 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable355 [2021-06-05 04:32:09,753 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:32:09,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:32:09,753 INFO L82 PathProgramCache]: Analyzing trace with hash -707111582, now seen corresponding path program 72 times [2021-06-05 04:32:09,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:32:09,753 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779760632] [2021-06-05 04:32:09,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:32:09,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:32:09,900 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 04:32:09,901 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:32:09,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779760632] [2021-06-05 04:32:09,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779760632] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:09,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970080784] [2021-06-05 04:32:09,901 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:32:09,923 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:32:09,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:32:09,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:32:09,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:32:10,068 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:10,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:32:10,069 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:32:10,090 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:32:10,093 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:10,093 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 13 treesize of output 9 [2021-06-05 04:32:10,095 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:32:10,115 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:32:10,117 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:10,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:32:10,118 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:32:10,137 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:32:10,140 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:10,140 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 13 treesize of output 9 [2021-06-05 04:32:10,141 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:32:10,160 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:32:10,161 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 04:32:10,161 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:77, output treesize:35 [2021-06-05 04:32:10,251 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 04:32:10,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [970080784] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:10,251 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:32:10,251 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 04:32:10,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235177097] [2021-06-05 04:32:10,251 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:32:10,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:32:10,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:32:10,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:32:10,252 INFO L87 Difference]: Start difference. First operand 86 states and 182 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:10,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:32:10,472 INFO L93 Difference]: Finished difference Result 117 states and 237 transitions. [2021-06-05 04:32:10,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:32:10,473 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 04:32:10,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:32:10,473 INFO L225 Difference]: With dead ends: 117 [2021-06-05 04:32:10,473 INFO L226 Difference]: Without dead ends: 103 [2021-06-05 04:32:10,473 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 336.7ms TimeCoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:32:10,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-06-05 04:32:10,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 86. [2021-06-05 04:32:10,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 2.1411764705882352) internal successors, (182), 85 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:10,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 182 transitions. [2021-06-05 04:32:10,475 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 182 transitions. Word has length 16 [2021-06-05 04:32:10,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:32:10,475 INFO L482 AbstractCegarLoop]: Abstraction has 86 states and 182 transitions. [2021-06-05 04:32:10,475 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 04:32:10,475 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 182 transitions. [2021-06-05 04:32:10,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:32:10,475 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:32:10,475 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:32:10,676 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable358 [2021-06-05 04:32:10,676 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:32:10,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:32:10,676 INFO L82 PathProgramCache]: Analyzing trace with hash -125256330, now seen corresponding path program 73 times [2021-06-05 04:32:10,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:32:10,676 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156034789] [2021-06-05 04:32:10,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:32:10,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:32:10,818 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 04:32:10,818 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:32:10,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156034789] [2021-06-05 04:32:10,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156034789] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:10,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1848032192] [2021-06-05 04:32:10,818 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 04:32:10,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:32:10,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:32:10,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:32:10,950 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:10,950 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 27 treesize of output 21 [2021-06-05 04:32:10,951 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:32:10,960 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:32:10,962 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:10,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:32:10,964 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:32:10,972 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:32:10,973 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 04:32:10,974 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:38, output treesize:13 [2021-06-05 04:32:11,016 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 04:32:11,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1848032192] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:11,017 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:32:11,017 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 04:32:11,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780000153] [2021-06-05 04:32:11,017 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:32:11,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:32:11,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:32:11,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:32:11,018 INFO L87 Difference]: Start difference. First operand 86 states and 182 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:11,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:32:11,299 INFO L93 Difference]: Finished difference Result 110 states and 228 transitions. [2021-06-05 04:32:11,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:32:11,300 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 04:32:11,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:32:11,300 INFO L225 Difference]: With dead ends: 110 [2021-06-05 04:32:11,300 INFO L226 Difference]: Without dead ends: 103 [2021-06-05 04:32:11,300 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 338.6ms TimeCoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:32:11,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-06-05 04:32:11,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 87. [2021-06-05 04:32:11,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 2.1511627906976742) internal successors, (185), 86 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:11,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 185 transitions. [2021-06-05 04:32:11,301 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 185 transitions. Word has length 16 [2021-06-05 04:32:11,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:32:11,302 INFO L482 AbstractCegarLoop]: Abstraction has 87 states and 185 transitions. [2021-06-05 04:32:11,302 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 04:32:11,302 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 185 transitions. [2021-06-05 04:32:11,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:32:11,302 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:32:11,302 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:32:11,502 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable365,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:32:11,503 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:32:11,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:32:11,503 INFO L82 PathProgramCache]: Analyzing trace with hash 1010928942, now seen corresponding path program 74 times [2021-06-05 04:32:11,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:32:11,503 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245466746] [2021-06-05 04:32:11,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:32:11,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:32:11,659 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 04:32:11,659 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:32:11,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245466746] [2021-06-05 04:32:11,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245466746] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:11,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118963335] [2021-06-05 04:32:11,659 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:32:11,682 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:32:11,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:32:11,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:32:11,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:32:11,761 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:11,761 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:11,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:32:11,763 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:32:11,765 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:11,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:32:11,766 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:32:11,788 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:32:11,790 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:11,791 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:11,791 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 13 treesize of output 9 [2021-06-05 04:32:11,792 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:32:11,794 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:11,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:32:11,796 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:32:11,816 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:32:11,817 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 04:32:11,817 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:35 [2021-06-05 04:32:11,894 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 04:32:11,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1118963335] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:11,895 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:32:11,895 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 04:32:11,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98372117] [2021-06-05 04:32:11,895 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:32:11,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:32:11,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:32:11,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:32:11,895 INFO L87 Difference]: Start difference. First operand 87 states and 185 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:12,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:32:12,188 INFO L93 Difference]: Finished difference Result 113 states and 233 transitions. [2021-06-05 04:32:12,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:32:12,188 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 04:32:12,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:32:12,188 INFO L225 Difference]: With dead ends: 113 [2021-06-05 04:32:12,189 INFO L226 Difference]: Without dead ends: 106 [2021-06-05 04:32:12,189 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 358.6ms TimeCoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:32:12,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-06-05 04:32:12,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 86. [2021-06-05 04:32:12,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 2.1411764705882352) internal successors, (182), 85 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:12,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 182 transitions. [2021-06-05 04:32:12,191 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 182 transitions. Word has length 16 [2021-06-05 04:32:12,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:32:12,191 INFO L482 AbstractCegarLoop]: Abstraction has 86 states and 182 transitions. [2021-06-05 04:32:12,191 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 04:32:12,191 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 182 transitions. [2021-06-05 04:32:12,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:32:12,191 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:32:12,191 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:32:12,413 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable366 [2021-06-05 04:32:12,413 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:32:12,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:32:12,413 INFO L82 PathProgramCache]: Analyzing trace with hash -1135241818, now seen corresponding path program 75 times [2021-06-05 04:32:12,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:32:12,414 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708521656] [2021-06-05 04:32:12,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:32:12,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:32:12,547 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 04:32:12,547 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:32:12,547 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708521656] [2021-06-05 04:32:12,548 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708521656] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:12,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140018609] [2021-06-05 04:32:12,548 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:32:12,583 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:32:12,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:32:12,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:32:12,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:32:12,682 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:12,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:32:12,684 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:32:12,712 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:32:12,716 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:12,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:32:12,717 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:32:12,743 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:32:12,748 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:12,748 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 10 treesize of output 6 [2021-06-05 04:32:12,750 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:32:12,774 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:32:12,777 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:12,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:32:12,779 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:32:12,802 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:32:12,808 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 04:32:12,808 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:77, output treesize:35 [2021-06-05 04:32:12,896 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 04:32:12,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2140018609] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:12,897 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:32:12,897 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 04:32:12,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111720378] [2021-06-05 04:32:12,897 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:32:12,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:32:12,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:32:12,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:32:12,897 INFO L87 Difference]: Start difference. First operand 86 states and 182 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:13,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:32:13,174 INFO L93 Difference]: Finished difference Result 126 states and 253 transitions. [2021-06-05 04:32:13,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:32:13,174 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 04:32:13,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:32:13,175 INFO L225 Difference]: With dead ends: 126 [2021-06-05 04:32:13,175 INFO L226 Difference]: Without dead ends: 112 [2021-06-05 04:32:13,175 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 350.6ms TimeCoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:32:13,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-06-05 04:32:13,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 86. [2021-06-05 04:32:13,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 2.1411764705882352) internal successors, (182), 85 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:13,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 182 transitions. [2021-06-05 04:32:13,177 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 182 transitions. Word has length 16 [2021-06-05 04:32:13,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:32:13,177 INFO L482 AbstractCegarLoop]: Abstraction has 86 states and 182 transitions. [2021-06-05 04:32:13,177 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 04:32:13,177 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 182 transitions. [2021-06-05 04:32:13,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:32:13,177 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:32:13,177 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:32:13,399 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable371,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:32:13,399 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:32:13,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:32:13,400 INFO L82 PathProgramCache]: Analyzing trace with hash 1052941358, now seen corresponding path program 76 times [2021-06-05 04:32:13,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:32:13,400 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798155700] [2021-06-05 04:32:13,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:32:13,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:32:13,547 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 04:32:13,547 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:32:13,547 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798155700] [2021-06-05 04:32:13,547 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798155700] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:13,547 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012667612] [2021-06-05 04:32:13,547 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:32:13,570 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:32:13,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:32:13,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:32:13,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:32:13,631 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:13,632 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:13,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:32:13,633 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:32:13,635 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:13,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:32:13,636 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:32:13,658 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:32:13,660 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:13,660 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:13,661 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 10 treesize of output 6 [2021-06-05 04:32:13,662 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:32:13,664 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:13,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:32:13,665 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:32:13,685 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:32:13,686 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 04:32:13,686 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:35 [2021-06-05 04:32:13,751 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 04:32:13,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1012667612] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:13,752 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:32:13,752 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 04:32:13,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342715759] [2021-06-05 04:32:13,752 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:32:13,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:32:13,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:32:13,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:32:13,752 INFO L87 Difference]: Start difference. First operand 86 states and 182 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:14,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:32:14,347 INFO L93 Difference]: Finished difference Result 181 states and 350 transitions. [2021-06-05 04:32:14,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:32:14,347 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 04:32:14,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:32:14,348 INFO L225 Difference]: With dead ends: 181 [2021-06-05 04:32:14,348 INFO L226 Difference]: Without dead ends: 151 [2021-06-05 04:32:14,348 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 591.6ms TimeCoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:32:14,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-06-05 04:32:14,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 90. [2021-06-05 04:32:14,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 2.191011235955056) internal successors, (195), 89 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:14,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 195 transitions. [2021-06-05 04:32:14,350 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 195 transitions. Word has length 16 [2021-06-05 04:32:14,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:32:14,350 INFO L482 AbstractCegarLoop]: Abstraction has 90 states and 195 transitions. [2021-06-05 04:32:14,350 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 04:32:14,351 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 195 transitions. [2021-06-05 04:32:14,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:32:14,351 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:32:14,351 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:32:14,560 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable378 [2021-06-05 04:32:14,561 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:32:14,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:32:14,561 INFO L82 PathProgramCache]: Analyzing trace with hash -275756062, now seen corresponding path program 77 times [2021-06-05 04:32:14,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:32:14,561 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240004114] [2021-06-05 04:32:14,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:32:14,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:32:14,736 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 04:32:14,737 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:32:14,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240004114] [2021-06-05 04:32:14,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240004114] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:14,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1049799682] [2021-06-05 04:32:14,737 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:32:14,760 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:32:14,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:32:14,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:32:14,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:32:14,830 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:14,839 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:14,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:32:14,840 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:32:14,843 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:14,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:32:14,844 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:32:14,865 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:32:14,879 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:14,880 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:14,880 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 10 treesize of output 6 [2021-06-05 04:32:14,881 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:32:14,884 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:14,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 04:32:14,885 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:32:14,905 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:32:14,906 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 04:32:14,906 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:35 [2021-06-05 04:32:14,987 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 04:32:14,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1049799682] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:14,987 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:32:14,987 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 04:32:14,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968666681] [2021-06-05 04:32:14,987 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:32:14,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:32:14,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:32:14,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:32:14,988 INFO L87 Difference]: Start difference. First operand 90 states and 195 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:15,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:32:15,388 INFO L93 Difference]: Finished difference Result 144 states and 298 transitions. [2021-06-05 04:32:15,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:32:15,389 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 04:32:15,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:32:15,389 INFO L225 Difference]: With dead ends: 144 [2021-06-05 04:32:15,389 INFO L226 Difference]: Without dead ends: 135 [2021-06-05 04:32:15,389 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 490.7ms TimeCoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:32:15,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-06-05 04:32:15,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 94. [2021-06-05 04:32:15,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 2.193548387096774) internal successors, (204), 93 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:15,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 204 transitions. [2021-06-05 04:32:15,391 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 204 transitions. Word has length 16 [2021-06-05 04:32:15,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:32:15,391 INFO L482 AbstractCegarLoop]: Abstraction has 94 states and 204 transitions. [2021-06-05 04:32:15,391 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 04:32:15,391 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 204 transitions. [2021-06-05 04:32:15,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:32:15,392 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:32:15,392 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:32:15,613 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable381 [2021-06-05 04:32:15,614 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:32:15,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:32:15,614 INFO L82 PathProgramCache]: Analyzing trace with hash 966701318, now seen corresponding path program 78 times [2021-06-05 04:32:15,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:32:15,614 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466886996] [2021-06-05 04:32:15,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:32:15,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:32:15,698 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 04:32:15,698 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:32:15,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466886996] [2021-06-05 04:32:15,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466886996] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:15,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023083135] [2021-06-05 04:32:15,698 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:32:15,735 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:32:15,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:32:15,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 04:32:15,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:32:15,870 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 04:32:15,870 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1023083135] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:15,870 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:32:15,870 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:32:15,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152013413] [2021-06-05 04:32:15,871 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:32:15,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:32:15,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:32:15,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:32:15,871 INFO L87 Difference]: Start difference. First operand 94 states and 204 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:16,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:32:16,078 INFO L93 Difference]: Finished difference Result 128 states and 259 transitions. [2021-06-05 04:32:16,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:32:16,078 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 04:32:16,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:32:16,078 INFO L225 Difference]: With dead ends: 128 [2021-06-05 04:32:16,078 INFO L226 Difference]: Without dead ends: 114 [2021-06-05 04:32:16,078 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 247.9ms TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:32:16,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-06-05 04:32:16,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 89. [2021-06-05 04:32:16,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 2.2045454545454546) internal successors, (194), 88 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:16,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 194 transitions. [2021-06-05 04:32:16,080 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 194 transitions. Word has length 17 [2021-06-05 04:32:16,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:32:16,080 INFO L482 AbstractCegarLoop]: Abstraction has 89 states and 194 transitions. [2021-06-05 04:32:16,080 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 04:32:16,080 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 194 transitions. [2021-06-05 04:32:16,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:32:16,080 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:32:16,080 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:32:16,288 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable384,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:32:16,289 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:32:16,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:32:16,289 INFO L82 PathProgramCache]: Analyzing trace with hash 1397953814, now seen corresponding path program 79 times [2021-06-05 04:32:16,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:32:16,289 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812103857] [2021-06-05 04:32:16,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:32:16,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:32:16,345 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:32:16,346 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:32:16,346 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812103857] [2021-06-05 04:32:16,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812103857] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:16,346 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [106566494] [2021-06-05 04:32:16,346 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:32:16,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:32:16,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:32:16,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:32:16,466 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 04:32:16,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [106566494] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:16,466 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:32:16,466 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 04:32:16,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428275876] [2021-06-05 04:32:16,467 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:32:16,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:32:16,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:32:16,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:32:16,467 INFO L87 Difference]: Start difference. First operand 89 states and 194 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:16,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:32:16,567 INFO L93 Difference]: Finished difference Result 126 states and 261 transitions. [2021-06-05 04:32:16,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:32:16,568 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 04:32:16,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:32:16,568 INFO L225 Difference]: With dead ends: 126 [2021-06-05 04:32:16,568 INFO L226 Difference]: Without dead ends: 126 [2021-06-05 04:32:16,569 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 93.0ms TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:32:16,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-06-05 04:32:16,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 90. [2021-06-05 04:32:16,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 2.2134831460674156) internal successors, (197), 89 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:16,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 197 transitions. [2021-06-05 04:32:16,570 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 197 transitions. Word has length 17 [2021-06-05 04:32:16,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:32:16,570 INFO L482 AbstractCegarLoop]: Abstraction has 90 states and 197 transitions. [2021-06-05 04:32:16,571 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 04:32:16,571 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 197 transitions. [2021-06-05 04:32:16,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:32:16,571 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:32:16,571 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:32:16,780 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable389 [2021-06-05 04:32:16,781 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:32:16,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:32:16,781 INFO L82 PathProgramCache]: Analyzing trace with hash 846772626, now seen corresponding path program 80 times [2021-06-05 04:32:16,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:32:16,781 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62957779] [2021-06-05 04:32:16,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:32:16,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:32:16,870 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 04:32:16,870 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:32:16,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62957779] [2021-06-05 04:32:16,870 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62957779] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:16,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658293084] [2021-06-05 04:32:16,871 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 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 04:32:16,899 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:32:16,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:32:16,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:32:16,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:32:17,037 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 04:32:17,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [658293084] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:17,038 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:32:17,038 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:32:17,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39581449] [2021-06-05 04:32:17,038 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:32:17,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:32:17,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:32:17,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:32:17,038 INFO L87 Difference]: Start difference. First operand 90 states and 197 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:17,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:32:17,414 INFO L93 Difference]: Finished difference Result 128 states and 260 transitions. [2021-06-05 04:32:17,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:32:17,414 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 04:32:17,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:32:17,414 INFO L225 Difference]: With dead ends: 128 [2021-06-05 04:32:17,414 INFO L226 Difference]: Without dead ends: 119 [2021-06-05 04:32:17,415 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 434.3ms TimeCoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:32:17,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-06-05 04:32:17,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 91. [2021-06-05 04:32:17,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 2.2111111111111112) internal successors, (199), 90 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:17,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 199 transitions. [2021-06-05 04:32:17,416 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 199 transitions. Word has length 17 [2021-06-05 04:32:17,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:32:17,417 INFO L482 AbstractCegarLoop]: Abstraction has 91 states and 199 transitions. [2021-06-05 04:32:17,417 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 04:32:17,417 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 199 transitions. [2021-06-05 04:32:17,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:32:17,417 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:32:17,417 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:32:17,639 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable392,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:32:17,640 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:32:17,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:32:17,640 INFO L82 PathProgramCache]: Analyzing trace with hash 396996678, now seen corresponding path program 81 times [2021-06-05 04:32:17,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:32:17,640 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698371468] [2021-06-05 04:32:17,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:32:17,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:32:17,702 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:32:17,702 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:32:17,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698371468] [2021-06-05 04:32:17,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698371468] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:17,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465031279] [2021-06-05 04:32:17,702 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:32:17,726 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:32:17,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:32:17,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:32:17,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:32:17,847 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 04:32:17,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [465031279] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:17,848 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:32:17,848 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:32:17,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971838280] [2021-06-05 04:32:17,848 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:32:17,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:32:17,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:32:17,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:32:17,848 INFO L87 Difference]: Start difference. First operand 91 states and 199 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:18,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:32:18,025 INFO L93 Difference]: Finished difference Result 143 states and 295 transitions. [2021-06-05 04:32:18,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:32:18,027 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:32:18,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:32:18,027 INFO L225 Difference]: With dead ends: 143 [2021-06-05 04:32:18,027 INFO L226 Difference]: Without dead ends: 143 [2021-06-05 04:32:18,028 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 168.3ms TimeCoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:32:18,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-06-05 04:32:18,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 91. [2021-06-05 04:32:18,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 2.2111111111111112) internal successors, (199), 90 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:18,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 199 transitions. [2021-06-05 04:32:18,030 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 199 transitions. Word has length 17 [2021-06-05 04:32:18,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:32:18,030 INFO L482 AbstractCegarLoop]: Abstraction has 91 states and 199 transitions. [2021-06-05 04:32:18,030 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 04:32:18,030 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 199 transitions. [2021-06-05 04:32:18,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:32:18,030 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:32:18,030 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:32:18,252 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable398 [2021-06-05 04:32:18,252 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:32:18,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:32:18,252 INFO L82 PathProgramCache]: Analyzing trace with hash 1799125834, now seen corresponding path program 82 times [2021-06-05 04:32:18,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:32:18,253 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57461672] [2021-06-05 04:32:18,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:32:18,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:32:18,350 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 04:32:18,351 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:32:18,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57461672] [2021-06-05 04:32:18,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57461672] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:18,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859186520] [2021-06-05 04:32:18,352 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 04:32:18,383 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:32:18,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:32:18,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:32:18,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:32:18,529 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 04:32:18,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1859186520] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:18,530 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:32:18,530 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:32:18,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987700494] [2021-06-05 04:32:18,530 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:32:18,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:32:18,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:32:18,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:32:18,530 INFO L87 Difference]: Start difference. First operand 91 states and 199 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:18,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:32:18,947 INFO L93 Difference]: Finished difference Result 126 states and 257 transitions. [2021-06-05 04:32:18,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:32:18,947 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 04:32:18,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:32:18,947 INFO L225 Difference]: With dead ends: 126 [2021-06-05 04:32:18,947 INFO L226 Difference]: Without dead ends: 120 [2021-06-05 04:32:18,948 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 437.7ms TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:32:18,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-06-05 04:32:18,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 91. [2021-06-05 04:32:18,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 2.2111111111111112) internal successors, (199), 90 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:18,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 199 transitions. [2021-06-05 04:32:18,949 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 199 transitions. Word has length 17 [2021-06-05 04:32:18,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:32:18,950 INFO L482 AbstractCegarLoop]: Abstraction has 91 states and 199 transitions. [2021-06-05 04:32:18,950 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 04:32:18,950 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 199 transitions. [2021-06-05 04:32:18,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:32:18,950 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:32:18,950 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:32:19,172 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable402 [2021-06-05 04:32:19,172 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:32:19,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:32:19,172 INFO L82 PathProgramCache]: Analyzing trace with hash -847782378, now seen corresponding path program 83 times [2021-06-05 04:32:19,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:32:19,173 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155905660] [2021-06-05 04:32:19,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:32:19,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:32:19,247 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:32:19,247 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:32:19,247 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155905660] [2021-06-05 04:32:19,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155905660] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:19,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564745018] [2021-06-05 04:32:19,248 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:32:19,271 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:32:19,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:32:19,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:32:19,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:32:19,408 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 04:32:19,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1564745018] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:19,409 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:32:19,409 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:32:19,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759064879] [2021-06-05 04:32:19,409 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:32:19,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:32:19,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:32:19,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:32:19,409 INFO L87 Difference]: Start difference. First operand 91 states and 199 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:19,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:32:19,573 INFO L93 Difference]: Finished difference Result 140 states and 289 transitions. [2021-06-05 04:32:19,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:32:19,573 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 04:32:19,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:32:19,574 INFO L225 Difference]: With dead ends: 140 [2021-06-05 04:32:19,574 INFO L226 Difference]: Without dead ends: 140 [2021-06-05 04:32:19,574 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 206.0ms TimeCoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:32:19,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-06-05 04:32:19,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 92. [2021-06-05 04:32:19,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 2.208791208791209) internal successors, (201), 91 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:19,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 201 transitions. [2021-06-05 04:32:19,576 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 201 transitions. Word has length 17 [2021-06-05 04:32:19,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:32:19,576 INFO L482 AbstractCegarLoop]: Abstraction has 92 states and 201 transitions. [2021-06-05 04:32:19,576 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 04:32:19,576 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 201 transitions. [2021-06-05 04:32:19,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:32:19,576 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:32:19,576 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:32:19,776 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable408,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:32:19,777 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:32:19,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:32:19,777 INFO L82 PathProgramCache]: Analyzing trace with hash -1633836398, now seen corresponding path program 84 times [2021-06-05 04:32:19,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:32:19,777 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087776106] [2021-06-05 04:32:19,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:32:19,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:32:19,875 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 04:32:19,875 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:32:19,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087776106] [2021-06-05 04:32:19,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087776106] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:19,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622822063] [2021-06-05 04:32:19,875 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:32:19,903 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:32:19,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:32:19,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:32:19,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:32:20,028 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:20,028 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:20,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:32:20,029 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:32:20,032 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:20,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:32:20,033 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:32:20,068 INFO L628 ElimStorePlain]: treesize reduction 60, result has 38.8 percent of original size [2021-06-05 04:32:20,068 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 04:32:20,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:32:20,071 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:32:20,083 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:32:20,083 INFO L518 ElimStorePlain]: Eliminatee v_prenex_77 vanished before elimination [2021-06-05 04:32:20,084 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 04:32:20,084 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-06-05 04:32:20,111 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:32:20,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1622822063] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:20,111 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:32:20,111 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:32:20,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152089754] [2021-06-05 04:32:20,111 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:32:20,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:32:20,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:32:20,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:32:20,111 INFO L87 Difference]: Start difference. First operand 92 states and 201 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:20,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:32:20,707 INFO L93 Difference]: Finished difference Result 139 states and 278 transitions. [2021-06-05 04:32:20,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:32:20,707 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 04:32:20,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:32:20,708 INFO L225 Difference]: With dead ends: 139 [2021-06-05 04:32:20,708 INFO L226 Difference]: Without dead ends: 136 [2021-06-05 04:32:20,708 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 622.8ms TimeCoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:32:20,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-06-05 04:32:20,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 97. [2021-06-05 04:32:20,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 2.2083333333333335) internal successors, (212), 96 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:20,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 212 transitions. [2021-06-05 04:32:20,709 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 212 transitions. Word has length 17 [2021-06-05 04:32:20,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:32:20,709 INFO L482 AbstractCegarLoop]: Abstraction has 97 states and 212 transitions. [2021-06-05 04:32:20,709 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:20,710 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 212 transitions. [2021-06-05 04:32:20,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:32:20,710 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:32:20,710 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:32:20,920 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable412 [2021-06-05 04:32:20,921 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:32:20,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:32:20,921 INFO L82 PathProgramCache]: Analyzing trace with hash -1857767866, now seen corresponding path program 85 times [2021-06-05 04:32:20,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:32:20,921 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712119595] [2021-06-05 04:32:20,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:32:20,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:32:20,990 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:32:20,990 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:32:20,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712119595] [2021-06-05 04:32:20,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712119595] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:20,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611777588] [2021-06-05 04:32:20,990 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 04:32:21,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:32:21,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:32:21,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:32:21,181 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 04:32:21,181 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1611777588] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:21,181 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:32:21,181 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:32:21,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098098205] [2021-06-05 04:32:21,181 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:32:21,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:32:21,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:32:21,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:32:21,182 INFO L87 Difference]: Start difference. First operand 97 states and 212 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:21,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:32:21,422 INFO L93 Difference]: Finished difference Result 141 states and 292 transitions. [2021-06-05 04:32:21,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:32:21,423 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 04:32:21,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:32:21,423 INFO L225 Difference]: With dead ends: 141 [2021-06-05 04:32:21,423 INFO L226 Difference]: Without dead ends: 141 [2021-06-05 04:32:21,423 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 242.1ms TimeCoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:32:21,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-06-05 04:32:21,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 97. [2021-06-05 04:32:21,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 2.2083333333333335) internal successors, (212), 96 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:21,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 212 transitions. [2021-06-05 04:32:21,425 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 212 transitions. Word has length 17 [2021-06-05 04:32:21,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:32:21,425 INFO L482 AbstractCegarLoop]: Abstraction has 97 states and 212 transitions. [2021-06-05 04:32:21,425 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 04:32:21,425 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 212 transitions. [2021-06-05 04:32:21,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:32:21,425 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:32:21,425 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:32:21,632 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable420 [2021-06-05 04:32:21,633 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:32:21,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:32:21,633 INFO L82 PathProgramCache]: Analyzing trace with hash -497651126, now seen corresponding path program 86 times [2021-06-05 04:32:21,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:32:21,633 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508292756] [2021-06-05 04:32:21,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:32:21,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:32:21,736 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 04:32:21,736 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:32:21,736 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508292756] [2021-06-05 04:32:21,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508292756] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:21,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1460115122] [2021-06-05 04:32:21,737 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:32:21,766 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:32:21,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:32:21,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:32:21,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:32:21,907 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:21,907 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:21,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:32:21,909 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:32:21,911 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:21,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:32:21,912 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:32:21,948 INFO L628 ElimStorePlain]: treesize reduction 60, result has 38.8 percent of original size [2021-06-05 04:32:21,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index 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 04:32:21,951 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:32:21,963 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:32:21,963 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 04:32:21,964 INFO L518 ElimStorePlain]: Eliminatee v_prenex_80 vanished before elimination [2021-06-05 04:32:21,968 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 04:32:21,969 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-06-05 04:32:22,001 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 04:32:22,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1460115122] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:22,001 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:32:22,001 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:32:22,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800523827] [2021-06-05 04:32:22,002 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:32:22,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:32:22,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:32:22,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:32:22,002 INFO L87 Difference]: Start difference. First operand 97 states and 212 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:22,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:32:22,429 INFO L93 Difference]: Finished difference Result 124 states and 257 transitions. [2021-06-05 04:32:22,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:32:22,429 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 04:32:22,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:32:22,430 INFO L225 Difference]: With dead ends: 124 [2021-06-05 04:32:22,430 INFO L226 Difference]: Without dead ends: 124 [2021-06-05 04:32:22,430 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 486.8ms TimeCoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:32:22,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-06-05 04:32:22,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 93. [2021-06-05 04:32:22,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 2.2065217391304346) internal successors, (203), 92 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:22,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 203 transitions. [2021-06-05 04:32:22,431 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 203 transitions. Word has length 17 [2021-06-05 04:32:22,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:32:22,432 INFO L482 AbstractCegarLoop]: Abstraction has 93 states and 203 transitions. [2021-06-05 04:32:22,432 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 04:32:22,432 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 203 transitions. [2021-06-05 04:32:22,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:32:22,432 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:32:22,432 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:32:22,636 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable430 [2021-06-05 04:32:22,637 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:32:22,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:32:22,637 INFO L82 PathProgramCache]: Analyzing trace with hash 1801174, now seen corresponding path program 87 times [2021-06-05 04:32:22,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:32:22,637 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158887827] [2021-06-05 04:32:22,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:32:22,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:32:22,704 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 04:32:22,704 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:32:22,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158887827] [2021-06-05 04:32:22,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158887827] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:22,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349487147] [2021-06-05 04:32:22,705 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:32:22,728 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:32:22,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:32:22,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:32:22,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:32:22,849 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 04:32:22,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1349487147] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:22,849 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:32:22,849 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:32:22,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572554542] [2021-06-05 04:32:22,849 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:32:22,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:32:22,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:32:22,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:32:22,850 INFO L87 Difference]: Start difference. First operand 93 states and 203 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:23,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:32:23,049 INFO L93 Difference]: Finished difference Result 109 states and 229 transitions. [2021-06-05 04:32:23,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:32:23,049 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 04:32:23,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:32:23,050 INFO L225 Difference]: With dead ends: 109 [2021-06-05 04:32:23,050 INFO L226 Difference]: Without dead ends: 100 [2021-06-05 04:32:23,050 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 230.9ms TimeCoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:32:23,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-06-05 04:32:23,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 95. [2021-06-05 04:32:23,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 2.202127659574468) internal successors, (207), 94 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:23,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 207 transitions. [2021-06-05 04:32:23,051 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 207 transitions. Word has length 17 [2021-06-05 04:32:23,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:32:23,051 INFO L482 AbstractCegarLoop]: Abstraction has 95 states and 207 transitions. [2021-06-05 04:32:23,051 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 04:32:23,051 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 207 transitions. [2021-06-05 04:32:23,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:32:23,052 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:32:23,052 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:32:23,264 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable437 [2021-06-05 04:32:23,265 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:32:23,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:32:23,265 INFO L82 PathProgramCache]: Analyzing trace with hash -447974774, now seen corresponding path program 88 times [2021-06-05 04:32:23,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:32:23,265 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503846785] [2021-06-05 04:32:23,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:32:23,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:32:23,321 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:32:23,321 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:32:23,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503846785] [2021-06-05 04:32:23,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503846785] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:23,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1837702506] [2021-06-05 04:32:23,321 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 04:32:23,344 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:32:23,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:32:23,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:32:23,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:32:23,440 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 04:32:23,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1837702506] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:23,441 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:32:23,441 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:32:23,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12560527] [2021-06-05 04:32:23,441 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:32:23,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:32:23,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:32:23,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:32:23,441 INFO L87 Difference]: Start difference. First operand 95 states and 207 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:23,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:32:23,517 INFO L93 Difference]: Finished difference Result 112 states and 240 transitions. [2021-06-05 04:32:23,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:32:23,517 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:32:23,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:32:23,518 INFO L225 Difference]: With dead ends: 112 [2021-06-05 04:32:23,518 INFO L226 Difference]: Without dead ends: 112 [2021-06-05 04:32:23,518 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 97.4ms TimeCoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:32:23,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-06-05 04:32:23,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 95. [2021-06-05 04:32:23,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 2.202127659574468) internal successors, (207), 94 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:23,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 207 transitions. [2021-06-05 04:32:23,519 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 207 transitions. Word has length 17 [2021-06-05 04:32:23,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:32:23,519 INFO L482 AbstractCegarLoop]: Abstraction has 95 states and 207 transitions. [2021-06-05 04:32:23,519 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 04:32:23,520 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 207 transitions. [2021-06-05 04:32:23,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:32:23,520 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:32:23,520 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:32:23,740 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable443 [2021-06-05 04:32:23,740 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:32:23,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:32:23,740 INFO L82 PathProgramCache]: Analyzing trace with hash 954154382, now seen corresponding path program 89 times [2021-06-05 04:32:23,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:32:23,740 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273781165] [2021-06-05 04:32:23,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:32:23,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:32:23,813 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 04:32:23,814 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:32:23,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273781165] [2021-06-05 04:32:23,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273781165] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:23,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457898666] [2021-06-05 04:32:23,814 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 04:32:23,837 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:32:23,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:32:23,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:32:23,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:32:23,959 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 04:32:23,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [457898666] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:23,959 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:32:23,959 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:32:23,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874482393] [2021-06-05 04:32:23,960 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:32:23,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:32:23,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:32:23,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:32:23,960 INFO L87 Difference]: Start difference. First operand 95 states and 207 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:24,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:32:24,210 INFO L93 Difference]: Finished difference Result 107 states and 226 transitions. [2021-06-05 04:32:24,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:32:24,210 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 04:32:24,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:32:24,210 INFO L225 Difference]: With dead ends: 107 [2021-06-05 04:32:24,210 INFO L226 Difference]: Without dead ends: 101 [2021-06-05 04:32:24,210 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 284.0ms TimeCoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:32:24,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-06-05 04:32:24,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 95. [2021-06-05 04:32:24,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 2.202127659574468) internal successors, (207), 94 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:24,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 207 transitions. [2021-06-05 04:32:24,212 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 207 transitions. Word has length 17 [2021-06-05 04:32:24,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:32:24,212 INFO L482 AbstractCegarLoop]: Abstraction has 95 states and 207 transitions. [2021-06-05 04:32:24,212 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 04:32:24,212 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 207 transitions. [2021-06-05 04:32:24,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:32:24,213 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:32:24,213 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:32:24,428 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable447,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:32:24,429 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:32:24,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:32:24,429 INFO L82 PathProgramCache]: Analyzing trace with hash -1692753830, now seen corresponding path program 90 times [2021-06-05 04:32:24,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:32:24,429 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120625985] [2021-06-05 04:32:24,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:32:24,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:32:24,484 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:32:24,484 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:32:24,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120625985] [2021-06-05 04:32:24,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120625985] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:24,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247780775] [2021-06-05 04:32:24,484 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 04:32:24,509 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:32:24,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:32:24,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:32:24,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:32:24,627 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 04:32:24,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1247780775] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:24,627 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:32:24,627 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:32:24,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435823016] [2021-06-05 04:32:24,627 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:32:24,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:32:24,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:32:24,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:32:24,628 INFO L87 Difference]: Start difference. First operand 95 states and 207 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:24,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:32:24,722 INFO L93 Difference]: Finished difference Result 125 states and 266 transitions. [2021-06-05 04:32:24,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:32:24,722 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:32:24,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:32:24,722 INFO L225 Difference]: With dead ends: 125 [2021-06-05 04:32:24,722 INFO L226 Difference]: Without dead ends: 125 [2021-06-05 04:32:24,722 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 116.6ms TimeCoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:32:24,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-06-05 04:32:24,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 96. [2021-06-05 04:32:24,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 2.2) internal successors, (209), 95 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:24,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 209 transitions. [2021-06-05 04:32:24,724 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 209 transitions. Word has length 17 [2021-06-05 04:32:24,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:32:24,724 INFO L482 AbstractCegarLoop]: Abstraction has 96 states and 209 transitions. [2021-06-05 04:32:24,724 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 04:32:24,724 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 209 transitions. [2021-06-05 04:32:24,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:32:24,724 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:32:24,724 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:32:24,928 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable453 [2021-06-05 04:32:24,929 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:32:24,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:32:24,929 INFO L82 PathProgramCache]: Analyzing trace with hash 1816159446, now seen corresponding path program 91 times [2021-06-05 04:32:24,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:32:24,929 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602302236] [2021-06-05 04:32:24,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:32:24,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:32:25,004 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 04:32:25,004 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:32:25,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602302236] [2021-06-05 04:32:25,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602302236] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:25,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738241873] [2021-06-05 04:32:25,004 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:32:25,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:32:25,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:32:25,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:32:25,158 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:25,159 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:25,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:32:25,160 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:32:25,163 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:25,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:32:25,164 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:32:25,211 INFO L628 ElimStorePlain]: treesize reduction 68, result has 36.4 percent of original size [2021-06-05 04:32:25,211 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 04:32:25,214 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 8 treesize of output 6 [2021-06-05 04:32:25,215 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:32:25,233 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:32:25,233 INFO L518 ElimStorePlain]: Eliminatee v_prenex_85 vanished before elimination [2021-06-05 04:32:25,234 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 04:32:25,234 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-06-05 04:32:25,272 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 04:32:25,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [738241873] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:25,272 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:32:25,272 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:32:25,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114488178] [2021-06-05 04:32:25,273 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:32:25,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:32:25,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:32:25,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:32:25,273 INFO L87 Difference]: Start difference. First operand 96 states and 209 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:25,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:32:25,608 INFO L93 Difference]: Finished difference Result 120 states and 247 transitions. [2021-06-05 04:32:25,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:32:25,608 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 04:32:25,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:32:25,609 INFO L225 Difference]: With dead ends: 120 [2021-06-05 04:32:25,609 INFO L226 Difference]: Without dead ends: 117 [2021-06-05 04:32:25,609 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 354.8ms TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:32:25,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-06-05 04:32:25,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 101. [2021-06-05 04:32:25,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 2.2) internal successors, (220), 100 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:25,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 220 transitions. [2021-06-05 04:32:25,610 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 220 transitions. Word has length 17 [2021-06-05 04:32:25,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:32:25,610 INFO L482 AbstractCegarLoop]: Abstraction has 101 states and 220 transitions. [2021-06-05 04:32:25,611 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 04:32:25,611 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 220 transitions. [2021-06-05 04:32:25,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:32:25,611 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:32:25,611 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:32:25,820 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable457 [2021-06-05 04:32:25,820 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:32:25,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:32:25,821 INFO L82 PathProgramCache]: Analyzing trace with hash 1592227978, now seen corresponding path program 92 times [2021-06-05 04:32:25,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:32:25,821 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145710570] [2021-06-05 04:32:25,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:32:25,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:32:25,880 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:32:25,881 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:32:25,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145710570] [2021-06-05 04:32:25,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145710570] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:25,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925548137] [2021-06-05 04:32:25,881 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:32:25,905 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:32:25,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:32:25,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 04:32:25,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:32:26,001 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:26,001 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:26,002 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 18 treesize of output 14 [2021-06-05 04:32:26,003 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:32:26,006 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:26,006 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 18 treesize of output 14 [2021-06-05 04:32:26,007 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:32:26,056 INFO L628 ElimStorePlain]: treesize reduction 74, result has 39.8 percent of original size [2021-06-05 04:32:26,058 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:26,059 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 12 treesize of output 8 [2021-06-05 04:32:26,060 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:32:26,076 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:32:26,078 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 04:32:26,079 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:32:26,094 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:32:26,094 INFO L518 ElimStorePlain]: Eliminatee v_prenex_88 vanished before elimination [2021-06-05 04:32:26,095 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 04:32:26,096 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:133, output treesize:22 [2021-06-05 04:32:26,139 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 04:32:26,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [925548137] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:26,139 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:32:26,139 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:32:26,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360550589] [2021-06-05 04:32:26,139 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:32:26,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:32:26,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:32:26,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:32:26,140 INFO L87 Difference]: Start difference. First operand 101 states and 220 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:26,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:32:26,223 INFO L93 Difference]: Finished difference Result 126 states and 269 transitions. [2021-06-05 04:32:26,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:32:26,223 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 04:32:26,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:32:26,223 INFO L225 Difference]: With dead ends: 126 [2021-06-05 04:32:26,223 INFO L226 Difference]: Without dead ends: 126 [2021-06-05 04:32:26,224 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 131.1ms TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:32:26,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-06-05 04:32:26,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 101. [2021-06-05 04:32:26,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 2.2) internal successors, (220), 100 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:26,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 220 transitions. [2021-06-05 04:32:26,225 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 220 transitions. Word has length 17 [2021-06-05 04:32:26,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:32:26,225 INFO L482 AbstractCegarLoop]: Abstraction has 101 states and 220 transitions. [2021-06-05 04:32:26,225 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 04:32:26,225 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 220 transitions. [2021-06-05 04:32:26,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:32:26,226 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:32:26,226 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:32:26,428 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable465 [2021-06-05 04:32:26,429 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:32:26,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:32:26,429 INFO L82 PathProgramCache]: Analyzing trace with hash -1342622578, now seen corresponding path program 93 times [2021-06-05 04:32:26,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:32:26,429 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850327852] [2021-06-05 04:32:26,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:32:26,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:32:26,518 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 04:32:26,519 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:32:26,519 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850327852] [2021-06-05 04:32:26,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850327852] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:26,519 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149419282] [2021-06-05 04:32:26,520 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:32:26,547 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:32:26,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:32:26,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:32:26,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:32:26,660 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:26,660 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:26,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:32:26,661 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:32:26,664 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:26,664 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 04:32:26,665 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:32:26,705 INFO L628 ElimStorePlain]: treesize reduction 68, result has 36.4 percent of original size [2021-06-05 04:32:26,707 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 8 treesize of output 6 [2021-06-05 04:32:26,708 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:32:26,720 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:32:26,720 INFO L518 ElimStorePlain]: Eliminatee v_prenex_91 vanished before elimination [2021-06-05 04:32:26,720 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 04:32:26,721 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 04:32:26,721 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-06-05 04:32:26,746 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 04:32:26,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1149419282] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:26,746 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:32:26,746 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:32:26,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228452302] [2021-06-05 04:32:26,746 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:32:26,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:32:26,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:32:26,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:32:26,747 INFO L87 Difference]: Start difference. First operand 101 states and 220 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:26,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:32:26,949 INFO L93 Difference]: Finished difference Result 105 states and 226 transitions. [2021-06-05 04:32:26,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:32:26,950 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 04:32:26,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:32:26,950 INFO L225 Difference]: With dead ends: 105 [2021-06-05 04:32:26,950 INFO L226 Difference]: Without dead ends: 105 [2021-06-05 04:32:26,950 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 263.2ms TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:32:26,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-06-05 04:32:26,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 94. [2021-06-05 04:32:26,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 2.204301075268817) internal successors, (205), 93 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:26,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 205 transitions. [2021-06-05 04:32:26,951 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 205 transitions. Word has length 17 [2021-06-05 04:32:26,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:32:26,951 INFO L482 AbstractCegarLoop]: Abstraction has 94 states and 205 transitions. [2021-06-05 04:32:26,951 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 04:32:26,952 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 205 transitions. [2021-06-05 04:32:26,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:32:26,952 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:32:26,952 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:32:27,152 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable469 [2021-06-05 04:32:27,152 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:32:27,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:32:27,153 INFO L82 PathProgramCache]: Analyzing trace with hash 68356102, now seen corresponding path program 94 times [2021-06-05 04:32:27,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:32:27,153 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58173384] [2021-06-05 04:32:27,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:32:27,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:32:27,217 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 04:32:27,217 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:32:27,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58173384] [2021-06-05 04:32:27,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58173384] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:27,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616333316] [2021-06-05 04:32:27,218 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:32:27,240 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:32:27,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:32:27,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:32:27,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:32:27,354 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 04:32:27,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [616333316] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:27,354 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:32:27,354 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:32:27,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081830268] [2021-06-05 04:32:27,355 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:32:27,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:32:27,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:32:27,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:32:27,355 INFO L87 Difference]: Start difference. First operand 94 states and 205 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:27,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:32:27,592 INFO L93 Difference]: Finished difference Result 106 states and 224 transitions. [2021-06-05 04:32:27,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:32:27,592 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 04:32:27,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:32:27,592 INFO L225 Difference]: With dead ends: 106 [2021-06-05 04:32:27,592 INFO L226 Difference]: Without dead ends: 100 [2021-06-05 04:32:27,592 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 242.9ms TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:32:27,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-06-05 04:32:27,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 93. [2021-06-05 04:32:27,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 2.2065217391304346) internal successors, (203), 92 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:27,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 203 transitions. [2021-06-05 04:32:27,594 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 203 transitions. Word has length 17 [2021-06-05 04:32:27,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:32:27,594 INFO L482 AbstractCegarLoop]: Abstraction has 93 states and 203 transitions. [2021-06-05 04:32:27,594 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 04:32:27,594 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 203 transitions. [2021-06-05 04:32:27,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:32:27,594 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:32:27,594 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:32:27,794 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable476 [2021-06-05 04:32:27,794 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:32:27,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:32:27,795 INFO L82 PathProgramCache]: Analyzing trace with hash 1716415186, now seen corresponding path program 95 times [2021-06-05 04:32:27,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:32:27,795 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033212860] [2021-06-05 04:32:27,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:32:27,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:32:27,857 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:32:27,857 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:32:27,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033212860] [2021-06-05 04:32:27,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033212860] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:27,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052035400] [2021-06-05 04:32:27,857 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:32:27,880 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:32:27,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:32:27,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:32:27,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:32:27,974 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 04:32:27,974 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2052035400] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:27,974 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:32:27,974 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:32:27,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263198282] [2021-06-05 04:32:27,974 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:32:27,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:32:27,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:32:27,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:32:27,975 INFO L87 Difference]: Start difference. First operand 93 states and 203 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:28,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:32:28,106 INFO L93 Difference]: Finished difference Result 123 states and 261 transitions. [2021-06-05 04:32:28,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:32:28,107 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:32:28,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:32:28,107 INFO L225 Difference]: With dead ends: 123 [2021-06-05 04:32:28,107 INFO L226 Difference]: Without dead ends: 123 [2021-06-05 04:32:28,107 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 129.5ms TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:32:28,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-06-05 04:32:28,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 95. [2021-06-05 04:32:28,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 2.202127659574468) internal successors, (207), 94 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:28,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 207 transitions. [2021-06-05 04:32:28,109 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 207 transitions. Word has length 17 [2021-06-05 04:32:28,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:32:28,109 INFO L482 AbstractCegarLoop]: Abstraction has 95 states and 207 transitions. [2021-06-05 04:32:28,109 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 04:32:28,109 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 207 transitions. [2021-06-05 04:32:28,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:32:28,109 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:32:28,109 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:32:28,320 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable482,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:32:28,320 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:32:28,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:32:28,321 INFO L82 PathProgramCache]: Analyzing trace with hash 930361166, now seen corresponding path program 96 times [2021-06-05 04:32:28,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:32:28,321 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990628073] [2021-06-05 04:32:28,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:32:28,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:32:28,395 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 04:32:28,395 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:32:28,395 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990628073] [2021-06-05 04:32:28,395 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990628073] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:28,395 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893914487] [2021-06-05 04:32:28,395 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:32:28,419 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:32:28,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:32:28,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:32:28,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:32:28,503 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:28,503 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:28,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:32:28,504 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:32:28,507 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:28,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:32:28,508 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:32:28,545 INFO L628 ElimStorePlain]: treesize reduction 68, result has 36.4 percent of original size [2021-06-05 04:32:28,546 INFO L518 ElimStorePlain]: Eliminatee v_prenex_93 vanished before elimination [2021-06-05 04:32:28,547 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 8 treesize of output 6 [2021-06-05 04:32:28,548 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:32:28,561 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:32:28,561 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 04:32:28,561 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 04:32:28,561 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-06-05 04:32:28,587 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 04:32:28,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893914487] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:28,588 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:32:28,588 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:32:28,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230683433] [2021-06-05 04:32:28,588 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:32:28,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:32:28,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:32:28,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:32:28,588 INFO L87 Difference]: Start difference. First operand 95 states and 207 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:28,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:32:28,935 INFO L93 Difference]: Finished difference Result 126 states and 259 transitions. [2021-06-05 04:32:28,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:32:28,936 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 04:32:28,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:32:28,936 INFO L225 Difference]: With dead ends: 126 [2021-06-05 04:32:28,936 INFO L226 Difference]: Without dead ends: 123 [2021-06-05 04:32:28,936 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 332.3ms TimeCoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:32:28,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-06-05 04:32:28,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 100. [2021-06-05 04:32:28,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 2.202020202020202) internal successors, (218), 99 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:28,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 218 transitions. [2021-06-05 04:32:28,938 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 218 transitions. Word has length 17 [2021-06-05 04:32:28,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:32:28,938 INFO L482 AbstractCegarLoop]: Abstraction has 100 states and 218 transitions. [2021-06-05 04:32:28,938 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 04:32:28,938 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 218 transitions. [2021-06-05 04:32:28,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:32:28,939 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:32:28,939 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:32:29,152 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable486 [2021-06-05 04:32:29,153 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:32:29,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:32:29,153 INFO L82 PathProgramCache]: Analyzing trace with hash 706429698, now seen corresponding path program 97 times [2021-06-05 04:32:29,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:32:29,153 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074065800] [2021-06-05 04:32:29,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:32:29,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:32:29,247 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:32:29,248 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:32:29,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074065800] [2021-06-05 04:32:29,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074065800] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:29,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014201391] [2021-06-05 04:32:29,248 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:32:29,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:32:29,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:32:29,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:32:29,434 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 04:32:29,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2014201391] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:29,435 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:32:29,435 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:32:29,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666547944] [2021-06-05 04:32:29,435 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:32:29,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:32:29,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:32:29,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:32:29,435 INFO L87 Difference]: Start difference. First operand 100 states and 218 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:29,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:32:29,709 INFO L93 Difference]: Finished difference Result 134 states and 284 transitions. [2021-06-05 04:32:29,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:32:29,709 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 04:32:29,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:32:29,710 INFO L225 Difference]: With dead ends: 134 [2021-06-05 04:32:29,710 INFO L226 Difference]: Without dead ends: 134 [2021-06-05 04:32:29,710 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 292.3ms TimeCoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:32:29,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-06-05 04:32:29,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 100. [2021-06-05 04:32:29,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 2.202020202020202) internal successors, (218), 99 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:29,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 218 transitions. [2021-06-05 04:32:29,715 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 218 transitions. Word has length 17 [2021-06-05 04:32:29,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:32:29,715 INFO L482 AbstractCegarLoop]: Abstraction has 100 states and 218 transitions. [2021-06-05 04:32:29,715 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 04:32:29,715 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 218 transitions. [2021-06-05 04:32:29,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:32:29,716 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:32:29,716 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:32:29,936 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable494,98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:32:29,937 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:32:29,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:32:29,937 INFO L82 PathProgramCache]: Analyzing trace with hash 2066546438, now seen corresponding path program 98 times [2021-06-05 04:32:29,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:32:29,937 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959386536] [2021-06-05 04:32:29,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:32:29,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:32:30,006 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 04:32:30,006 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:32:30,006 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959386536] [2021-06-05 04:32:30,007 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959386536] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:30,007 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605267048] [2021-06-05 04:32:30,007 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:32:30,031 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:32:30,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:32:30,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:32:30,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:32:30,129 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:30,130 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:30,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:32:30,131 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:32:30,133 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:30,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:32:30,135 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:32:30,180 INFO L628 ElimStorePlain]: treesize reduction 60, result has 38.8 percent of original size [2021-06-05 04:32:30,180 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 04:32:30,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index 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 04:32:30,184 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:32:30,201 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:32:30,202 INFO L518 ElimStorePlain]: Eliminatee v_prenex_96 vanished before elimination [2021-06-05 04:32:30,203 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 04:32:30,203 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-06-05 04:32:30,235 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 04:32:30,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [605267048] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:30,236 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:32:30,236 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:32:30,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427286373] [2021-06-05 04:32:30,236 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:32:30,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:32:30,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:32:30,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:32:30,236 INFO L87 Difference]: Start difference. First operand 100 states and 218 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:30,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:32:30,490 INFO L93 Difference]: Finished difference Result 111 states and 238 transitions. [2021-06-05 04:32:30,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:32:30,490 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 04:32:30,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:32:30,490 INFO L225 Difference]: With dead ends: 111 [2021-06-05 04:32:30,490 INFO L226 Difference]: Without dead ends: 111 [2021-06-05 04:32:30,490 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 256.1ms TimeCoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:32:30,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-06-05 04:32:30,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 94. [2021-06-05 04:32:30,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 2.204301075268817) internal successors, (205), 93 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:30,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 205 transitions. [2021-06-05 04:32:30,492 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 205 transitions. Word has length 17 [2021-06-05 04:32:30,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:32:30,492 INFO L482 AbstractCegarLoop]: Abstraction has 94 states and 205 transitions. [2021-06-05 04:32:30,492 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 04:32:30,492 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 205 transitions. [2021-06-05 04:32:30,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:32:30,492 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:32:30,492 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:32:30,693 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable506,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:32:30,693 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:32:30,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:32:30,693 INFO L82 PathProgramCache]: Analyzing trace with hash -1176422954, now seen corresponding path program 99 times [2021-06-05 04:32:30,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:32:30,693 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561834981] [2021-06-05 04:32:30,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:32:30,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:32:30,757 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:32:30,757 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:32:30,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561834981] [2021-06-05 04:32:30,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561834981] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:30,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890362831] [2021-06-05 04:32:30,758 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:32:30,780 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:32:30,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:32:30,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:32:30,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:32:30,862 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:30,862 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:30,863 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 04:32:30,863 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:32:30,866 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:30,866 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:30,867 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 17 treesize of output 13 [2021-06-05 04:32:30,868 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:32:30,870 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:30,870 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:30,871 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 16 treesize of output 12 [2021-06-05 04:32:30,871 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:32:30,874 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:30,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:32:30,875 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:32:30,915 INFO L628 ElimStorePlain]: treesize reduction 53, result has 36.9 percent of original size [2021-06-05 04:32:30,915 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 04:32:30,916 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 04:32:30,917 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:121, output treesize:15 [2021-06-05 04:32:30,949 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 04:32:30,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [890362831] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:30,950 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:32:30,950 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:32:30,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267712950] [2021-06-05 04:32:30,950 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:32:30,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:32:30,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:32:30,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:32:30,951 INFO L87 Difference]: Start difference. First operand 94 states and 205 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:31,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:32:31,131 INFO L93 Difference]: Finished difference Result 139 states and 285 transitions. [2021-06-05 04:32:31,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:32:31,131 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 04:32:31,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:32:31,132 INFO L225 Difference]: With dead ends: 139 [2021-06-05 04:32:31,132 INFO L226 Difference]: Without dead ends: 136 [2021-06-05 04:32:31,132 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 178.5ms TimeCoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:32:31,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-06-05 04:32:31,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 101. [2021-06-05 04:32:31,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 2.22) internal successors, (222), 100 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:31,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 222 transitions. [2021-06-05 04:32:31,133 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 222 transitions. Word has length 17 [2021-06-05 04:32:31,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:32:31,133 INFO L482 AbstractCegarLoop]: Abstraction has 101 states and 222 transitions. [2021-06-05 04:32:31,134 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 04:32:31,134 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 222 transitions. [2021-06-05 04:32:31,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:32:31,134 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:32:31,134 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:32:31,344 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable513 [2021-06-05 04:32:31,345 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:32:31,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:32:31,345 INFO L82 PathProgramCache]: Analyzing trace with hash -1400354422, now seen corresponding path program 100 times [2021-06-05 04:32:31,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:32:31,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662609492] [2021-06-05 04:32:31,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:32:31,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:32:31,427 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:32:31,427 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:32:31,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662609492] [2021-06-05 04:32:31,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662609492] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:31,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825610293] [2021-06-05 04:32:31,428 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:32:31,451 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:32:31,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:32:31,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:32:31,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:32:31,542 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 04:32:31,542 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1825610293] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:31,542 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:32:31,542 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:32:31,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090244403] [2021-06-05 04:32:31,542 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:32:31,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:32:31,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:32:31,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:32:31,543 INFO L87 Difference]: Start difference. First operand 101 states and 222 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:31,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:32:31,719 INFO L93 Difference]: Finished difference Result 133 states and 276 transitions. [2021-06-05 04:32:31,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:32:31,719 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:32:31,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:32:31,719 INFO L225 Difference]: With dead ends: 133 [2021-06-05 04:32:31,719 INFO L226 Difference]: Without dead ends: 133 [2021-06-05 04:32:31,719 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 187.8ms TimeCoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:32:31,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-06-05 04:32:31,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 101. [2021-06-05 04:32:31,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 2.22) internal successors, (222), 100 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:31,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 222 transitions. [2021-06-05 04:32:31,721 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 222 transitions. Word has length 17 [2021-06-05 04:32:31,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:32:31,721 INFO L482 AbstractCegarLoop]: Abstraction has 101 states and 222 transitions. [2021-06-05 04:32:31,721 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:31,721 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 222 transitions. [2021-06-05 04:32:31,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:32:31,723 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:32:31,723 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:32:31,924 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable524,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:32:31,924 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:32:31,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:32:31,924 INFO L82 PathProgramCache]: Analyzing trace with hash -40237682, now seen corresponding path program 101 times [2021-06-05 04:32:31,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:32:31,924 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168753292] [2021-06-05 04:32:31,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:32:31,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:32:31,992 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 04:32:31,992 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:32:31,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168753292] [2021-06-05 04:32:31,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168753292] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:31,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856650441] [2021-06-05 04:32:31,992 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:32:32,020 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:32:32,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:32:32,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:32:32,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:32:32,110 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:32,110 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:32,111 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 04:32:32,111 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:32:32,113 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:32,114 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:32,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:32:32,123 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:32:32,125 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:32,126 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:32,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:32:32,127 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:32:32,129 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:32,129 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 16 treesize of output 12 [2021-06-05 04:32:32,130 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:32:32,161 INFO L628 ElimStorePlain]: treesize reduction 53, result has 36.9 percent of original size [2021-06-05 04:32:32,161 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 04:32:32,162 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 04:32:32,162 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:121, output treesize:15 [2021-06-05 04:32:32,185 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 04:32:32,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1856650441] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:32,185 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:32:32,185 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:32:32,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244458091] [2021-06-05 04:32:32,185 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:32:32,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:32:32,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:32:32,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:32:32,186 INFO L87 Difference]: Start difference. First operand 101 states and 222 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:32,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:32:32,386 INFO L93 Difference]: Finished difference Result 144 states and 297 transitions. [2021-06-05 04:32:32,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:32:32,386 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 04:32:32,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:32:32,386 INFO L225 Difference]: With dead ends: 144 [2021-06-05 04:32:32,387 INFO L226 Difference]: Without dead ends: 144 [2021-06-05 04:32:32,387 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 193.3ms TimeCoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:32:32,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-06-05 04:32:32,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 100. [2021-06-05 04:32:32,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 2.2222222222222223) internal successors, (220), 99 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:32,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 220 transitions. [2021-06-05 04:32:32,388 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 220 transitions. Word has length 17 [2021-06-05 04:32:32,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:32:32,388 INFO L482 AbstractCegarLoop]: Abstraction has 100 states and 220 transitions. [2021-06-05 04:32:32,388 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 04:32:32,388 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 220 transitions. [2021-06-05 04:32:32,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:32:32,388 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:32:32,388 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:32:32,592 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable534 [2021-06-05 04:32:32,593 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:32:32,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:32:32,593 INFO L82 PathProgramCache]: Analyzing trace with hash 2021677620, now seen corresponding path program 102 times [2021-06-05 04:32:32,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:32:32,593 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587603987] [2021-06-05 04:32:32,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:32:32,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:32:32,672 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 04:32:32,672 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:32:32,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587603987] [2021-06-05 04:32:32,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587603987] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:32,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40765028] [2021-06-05 04:32:32,673 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:32:32,696 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:32:32,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:32:32,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:32:32,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:32:32,777 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 04:32:32,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [40765028] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:32,777 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:32:32,777 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:32:32,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902173423] [2021-06-05 04:32:32,777 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:32:32,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:32:32,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:32:32,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:32:32,778 INFO L87 Difference]: Start difference. First operand 100 states and 220 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:32,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:32:32,974 INFO L93 Difference]: Finished difference Result 109 states and 233 transitions. [2021-06-05 04:32:32,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:32:32,975 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:32:32,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:32:32,975 INFO L225 Difference]: With dead ends: 109 [2021-06-05 04:32:32,975 INFO L226 Difference]: Without dead ends: 105 [2021-06-05 04:32:32,975 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 224.5ms TimeCoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:32:32,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-06-05 04:32:32,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 100. [2021-06-05 04:32:32,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 2.212121212121212) internal successors, (219), 99 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:32,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 219 transitions. [2021-06-05 04:32:32,984 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 219 transitions. Word has length 17 [2021-06-05 04:32:32,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:32:32,984 INFO L482 AbstractCegarLoop]: Abstraction has 100 states and 219 transitions. [2021-06-05 04:32:32,985 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 04:32:32,985 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 219 transitions. [2021-06-05 04:32:32,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:32:32,985 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:32:32,985 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:32:33,196 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable544,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:32:33,196 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:32:33,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:32:33,196 INFO L82 PathProgramCache]: Analyzing trace with hash 2108558854, now seen corresponding path program 103 times [2021-06-05 04:32:33,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:32:33,197 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481767410] [2021-06-05 04:32:33,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:32:33,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:32:33,256 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 04:32:33,256 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:32:33,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481767410] [2021-06-05 04:32:33,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481767410] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:33,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589646484] [2021-06-05 04:32:33,257 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 04:32:33,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:32:33,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:32:33,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:32:33,350 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:33,351 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:33,351 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 04:32:33,352 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:32:33,354 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:33,354 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 04:32:33,355 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:32:33,368 INFO L628 ElimStorePlain]: treesize reduction 29, result has 32.6 percent of original size [2021-06-05 04:32:33,369 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 04:32:33,369 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:32:33,369 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:57, output treesize:6 [2021-06-05 04:32:33,375 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 04:32:33,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1589646484] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:33,375 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:32:33,375 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:32:33,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126498338] [2021-06-05 04:32:33,375 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:32:33,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:32:33,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:32:33,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:32:33,376 INFO L87 Difference]: Start difference. First operand 100 states and 219 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:33,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:32:33,506 INFO L93 Difference]: Finished difference Result 121 states and 258 transitions. [2021-06-05 04:32:33,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:32:33,506 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 04:32:33,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:32:33,506 INFO L225 Difference]: With dead ends: 121 [2021-06-05 04:32:33,506 INFO L226 Difference]: Without dead ends: 121 [2021-06-05 04:32:33,506 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 139.8ms TimeCoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:32:33,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-06-05 04:32:33,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 95. [2021-06-05 04:32:33,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 2.202127659574468) internal successors, (207), 94 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:33,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 207 transitions. [2021-06-05 04:32:33,508 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 207 transitions. Word has length 17 [2021-06-05 04:32:33,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:32:33,508 INFO L482 AbstractCegarLoop]: Abstraction has 95 states and 207 transitions. [2021-06-05 04:32:33,508 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 04:32:33,508 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 207 transitions. [2021-06-05 04:32:33,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:32:33,508 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:32:33,508 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:32:33,708 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable548,104 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:32:33,708 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:32:33,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:32:33,709 INFO L82 PathProgramCache]: Analyzing trace with hash -422510062, now seen corresponding path program 104 times [2021-06-05 04:32:33,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:32:33,709 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133846129] [2021-06-05 04:32:33,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:32:33,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:32:33,790 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 04:32:33,791 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:32:33,791 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133846129] [2021-06-05 04:32:33,791 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133846129] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:33,791 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229235556] [2021-06-05 04:32:33,791 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:32:33,826 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:32:33,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:32:33,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:32:33,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:32:33,964 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 04:32:33,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [229235556] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:33,965 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:32:33,965 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:32:33,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515200169] [2021-06-05 04:32:33,965 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:32:33,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:32:33,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:32:33,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:32:33,965 INFO L87 Difference]: Start difference. First operand 95 states and 207 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:34,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:32:34,162 INFO L93 Difference]: Finished difference Result 107 states and 225 transitions. [2021-06-05 04:32:34,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:32:34,163 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 04:32:34,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:32:34,163 INFO L225 Difference]: With dead ends: 107 [2021-06-05 04:32:34,163 INFO L226 Difference]: Without dead ends: 98 [2021-06-05 04:32:34,163 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 266.0ms TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:32:34,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-06-05 04:32:34,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 95. [2021-06-05 04:32:34,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 2.1914893617021276) internal successors, (206), 94 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:34,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 206 transitions. [2021-06-05 04:32:34,165 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 206 transitions. Word has length 17 [2021-06-05 04:32:34,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:32:34,165 INFO L482 AbstractCegarLoop]: Abstraction has 95 states and 206 transitions. [2021-06-05 04:32:34,165 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 04:32:34,165 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 206 transitions. [2021-06-05 04:32:34,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:32:34,165 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:32:34,165 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:32:34,366 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable552 [2021-06-05 04:32:34,366 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:32:34,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:32:34,366 INFO L82 PathProgramCache]: Analyzing trace with hash -872286010, now seen corresponding path program 105 times [2021-06-05 04:32:34,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:32:34,366 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358111182] [2021-06-05 04:32:34,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:32:34,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:32:34,442 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:32:34,442 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:32:34,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358111182] [2021-06-05 04:32:34,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358111182] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:34,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470261267] [2021-06-05 04:32:34,442 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 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 04:32:34,472 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:32:34,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:32:34,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:32:34,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:32:34,615 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 04:32:34,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1470261267] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:34,616 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:32:34,616 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 04:32:34,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056649585] [2021-06-05 04:32:34,616 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:32:34,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:32:34,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:32:34,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:32:34,616 INFO L87 Difference]: Start difference. First operand 95 states and 206 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:34,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:32:34,716 INFO L93 Difference]: Finished difference Result 110 states and 236 transitions. [2021-06-05 04:32:34,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:32:34,716 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:32:34,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:32:34,716 INFO L225 Difference]: With dead ends: 110 [2021-06-05 04:32:34,716 INFO L226 Difference]: Without dead ends: 110 [2021-06-05 04:32:34,717 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 154.5ms TimeCoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:32:34,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-06-05 04:32:34,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 95. [2021-06-05 04:32:34,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 2.1914893617021276) internal successors, (206), 94 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:34,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 206 transitions. [2021-06-05 04:32:34,718 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 206 transitions. Word has length 17 [2021-06-05 04:32:34,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:32:34,718 INFO L482 AbstractCegarLoop]: Abstraction has 95 states and 206 transitions. [2021-06-05 04:32:34,718 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 04:32:34,718 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 206 transitions. [2021-06-05 04:32:34,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:32:34,719 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:32:34,719 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:32:34,936 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable558 [2021-06-05 04:32:34,937 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:32:34,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:32:34,937 INFO L82 PathProgramCache]: Analyzing trace with hash 529843146, now seen corresponding path program 106 times [2021-06-05 04:32:34,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:32:34,937 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657953368] [2021-06-05 04:32:34,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:32:34,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:32:35,003 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 04:32:35,003 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:32:35,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657953368] [2021-06-05 04:32:35,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657953368] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:35,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2001394500] [2021-06-05 04:32:35,003 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:32:35,026 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:32:35,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:32:35,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:32:35,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:32:35,162 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 04:32:35,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2001394500] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:35,162 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:32:35,162 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:32:35,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416412408] [2021-06-05 04:32:35,162 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:32:35,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:32:35,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:32:35,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:32:35,162 INFO L87 Difference]: Start difference. First operand 95 states and 206 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:35,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:32:35,444 INFO L93 Difference]: Finished difference Result 105 states and 222 transitions. [2021-06-05 04:32:35,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:32:35,445 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 04:32:35,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:32:35,445 INFO L225 Difference]: With dead ends: 105 [2021-06-05 04:32:35,445 INFO L226 Difference]: Without dead ends: 99 [2021-06-05 04:32:35,445 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 327.8ms TimeCoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:32:35,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-06-05 04:32:35,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 95. [2021-06-05 04:32:35,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 2.1914893617021276) internal successors, (206), 94 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:35,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 206 transitions. [2021-06-05 04:32:35,446 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 206 transitions. Word has length 17 [2021-06-05 04:32:35,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:32:35,446 INFO L482 AbstractCegarLoop]: Abstraction has 95 states and 206 transitions. [2021-06-05 04:32:35,446 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 04:32:35,447 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 206 transitions. [2021-06-05 04:32:35,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:32:35,447 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:32:35,447 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:32:35,647 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable562,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:32:35,647 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:32:35,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:32:35,648 INFO L82 PathProgramCache]: Analyzing trace with hash -2117065066, now seen corresponding path program 107 times [2021-06-05 04:32:35,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:32:35,648 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574351894] [2021-06-05 04:32:35,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:32:35,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:32:35,708 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:32:35,708 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:32:35,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574351894] [2021-06-05 04:32:35,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574351894] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:35,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494521963] [2021-06-05 04:32:35,708 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:32:35,732 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:32:35,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:32:35,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:32:35,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:32:35,879 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 04:32:35,879 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [494521963] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:35,879 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:32:35,879 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:32:35,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437076203] [2021-06-05 04:32:35,879 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:32:35,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:32:35,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:32:35,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:32:35,880 INFO L87 Difference]: Start difference. First operand 95 states and 206 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:36,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:32:36,161 INFO L93 Difference]: Finished difference Result 123 states and 262 transitions. [2021-06-05 04:32:36,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:32:36,161 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 04:32:36,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:32:36,162 INFO L225 Difference]: With dead ends: 123 [2021-06-05 04:32:36,162 INFO L226 Difference]: Without dead ends: 123 [2021-06-05 04:32:36,162 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 305.7ms TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:32:36,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-06-05 04:32:36,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 96. [2021-06-05 04:32:36,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 2.1894736842105265) internal successors, (208), 95 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:36,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 208 transitions. [2021-06-05 04:32:36,164 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 208 transitions. Word has length 17 [2021-06-05 04:32:36,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:32:36,164 INFO L482 AbstractCegarLoop]: Abstraction has 96 states and 208 transitions. [2021-06-05 04:32:36,164 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 04:32:36,164 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 208 transitions. [2021-06-05 04:32:36,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:32:36,164 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:32:36,164 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:32:36,364 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable568 [2021-06-05 04:32:36,365 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:32:36,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:32:36,365 INFO L82 PathProgramCache]: Analyzing trace with hash 1391848210, now seen corresponding path program 108 times [2021-06-05 04:32:36,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:32:36,365 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425516984] [2021-06-05 04:32:36,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:32:36,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:32:36,442 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 04:32:36,443 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:32:36,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425516984] [2021-06-05 04:32:36,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425516984] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:36,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555555556] [2021-06-05 04:32:36,443 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:32:36,470 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:32:36,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:32:36,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 04:32:36,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:32:36,600 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:36,601 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:36,601 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 17 treesize of output 13 [2021-06-05 04:32:36,602 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:32:36,605 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:36,606 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 18 treesize of output 14 [2021-06-05 04:32:36,606 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:32:36,666 INFO L628 ElimStorePlain]: treesize reduction 74, result has 41.7 percent of original size [2021-06-05 04:32:36,673 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:36,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-06-05 04:32:36,675 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:32:36,696 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:32:36,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:32:36,700 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:32:36,716 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:32:36,717 INFO L518 ElimStorePlain]: Eliminatee v_prenex_103 vanished before elimination [2021-06-05 04:32:36,718 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 04:32:36,718 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:141, output treesize:22 [2021-06-05 04:32:36,748 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 04:32:36,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [555555556] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:36,748 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:32:36,748 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:32:36,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668640329] [2021-06-05 04:32:36,748 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:32:36,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:32:36,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:32:36,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:32:36,749 INFO L87 Difference]: Start difference. First operand 96 states and 208 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:36,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:32:36,989 INFO L93 Difference]: Finished difference Result 123 states and 253 transitions. [2021-06-05 04:32:36,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:32:36,989 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 04:32:36,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:32:36,989 INFO L225 Difference]: With dead ends: 123 [2021-06-05 04:32:36,989 INFO L226 Difference]: Without dead ends: 120 [2021-06-05 04:32:36,990 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 260.3ms TimeCoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:32:36,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-06-05 04:32:36,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 101. [2021-06-05 04:32:36,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 2.19) internal successors, (219), 100 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:36,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 219 transitions. [2021-06-05 04:32:36,991 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 219 transitions. Word has length 17 [2021-06-05 04:32:36,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:32:36,991 INFO L482 AbstractCegarLoop]: Abstraction has 101 states and 219 transitions. [2021-06-05 04:32:36,991 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 04:32:36,991 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 219 transitions. [2021-06-05 04:32:36,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:32:36,991 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:32:36,991 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:32:37,191 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable572,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:32:37,192 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:32:37,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:32:37,192 INFO L82 PathProgramCache]: Analyzing trace with hash 1167916742, now seen corresponding path program 109 times [2021-06-05 04:32:37,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:32:37,192 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691668019] [2021-06-05 04:32:37,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:32:37,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:32:37,261 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:32:37,261 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:32:37,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691668019] [2021-06-05 04:32:37,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691668019] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:37,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588716841] [2021-06-05 04:32:37,261 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:32:37,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:32:37,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:32:37,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:32:37,432 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 04:32:37,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1588716841] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:37,433 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:32:37,433 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 04:32:37,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181874712] [2021-06-05 04:32:37,433 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:32:37,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:32:37,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:32:37,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:32:37,433 INFO L87 Difference]: Start difference. First operand 101 states and 219 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:37,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:32:37,740 INFO L93 Difference]: Finished difference Result 134 states and 285 transitions. [2021-06-05 04:32:37,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:32:37,740 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:32:37,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:32:37,740 INFO L225 Difference]: With dead ends: 134 [2021-06-05 04:32:37,740 INFO L226 Difference]: Without dead ends: 134 [2021-06-05 04:32:37,741 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 335.0ms TimeCoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:32:37,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-06-05 04:32:37,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 101. [2021-06-05 04:32:37,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 2.19) internal successors, (219), 100 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:37,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 219 transitions. [2021-06-05 04:32:37,742 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 219 transitions. Word has length 17 [2021-06-05 04:32:37,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:32:37,742 INFO L482 AbstractCegarLoop]: Abstraction has 101 states and 219 transitions. [2021-06-05 04:32:37,742 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 04:32:37,742 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 219 transitions. [2021-06-05 04:32:37,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:32:37,742 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:32:37,742 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:32:37,943 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable579 [2021-06-05 04:32:37,943 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:32:37,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:32:37,943 INFO L82 PathProgramCache]: Analyzing trace with hash -1766933814, now seen corresponding path program 110 times [2021-06-05 04:32:37,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:32:37,944 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910890007] [2021-06-05 04:32:37,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:32:37,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:32:38,033 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 04:32:38,033 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:32:38,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910890007] [2021-06-05 04:32:38,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910890007] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:38,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121511651] [2021-06-05 04:32:38,034 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 04:32:38,062 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:32:38,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:32:38,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:32:38,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:32:38,211 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:38,211 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:38,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:32:38,213 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:32:38,215 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:38,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:32:38,216 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:32:38,264 INFO L628 ElimStorePlain]: treesize reduction 68, result has 36.4 percent of original size [2021-06-05 04:32:38,267 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 04:32:38,268 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:32:38,286 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:32:38,286 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 04:32:38,286 INFO L518 ElimStorePlain]: Eliminatee v_prenex_106 vanished before elimination [2021-06-05 04:32:38,287 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 04:32:38,287 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-06-05 04:32:38,322 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 04:32:38,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [121511651] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:38,322 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:32:38,322 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:32:38,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689349814] [2021-06-05 04:32:38,322 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:32:38,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:32:38,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:32:38,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:32:38,323 INFO L87 Difference]: Start difference. First operand 101 states and 219 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:38,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:32:38,570 INFO L93 Difference]: Finished difference Result 108 states and 232 transitions. [2021-06-05 04:32:38,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:32:38,571 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 04:32:38,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:32:38,571 INFO L225 Difference]: With dead ends: 108 [2021-06-05 04:32:38,571 INFO L226 Difference]: Without dead ends: 108 [2021-06-05 04:32:38,571 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 329.6ms TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:32:38,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-06-05 04:32:38,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 93. [2021-06-05 04:32:38,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 2.1956521739130435) internal successors, (202), 92 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:38,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 202 transitions. [2021-06-05 04:32:38,572 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 202 transitions. Word has length 17 [2021-06-05 04:32:38,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:32:38,572 INFO L482 AbstractCegarLoop]: Abstraction has 93 states and 202 transitions. [2021-06-05 04:32:38,572 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 04:32:38,572 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 202 transitions. [2021-06-05 04:32:38,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:32:38,572 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:32:38,573 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:32:38,773 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable591,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:32:38,773 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:32:38,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:32:38,773 INFO L82 PathProgramCache]: Analyzing trace with hash -2045898038, now seen corresponding path program 111 times [2021-06-05 04:32:38,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:32:38,773 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114823311] [2021-06-05 04:32:38,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:32:38,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:32:38,855 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 04:32:38,855 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:32:38,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114823311] [2021-06-05 04:32:38,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114823311] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:38,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451893577] [2021-06-05 04:32:38,855 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:32:38,903 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:32:38,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:32:38,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:32:38,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:32:39,049 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 04:32:39,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [451893577] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:39,050 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:32:39,050 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:32:39,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082489790] [2021-06-05 04:32:39,050 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:32:39,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:32:39,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:32:39,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:32:39,050 INFO L87 Difference]: Start difference. First operand 93 states and 202 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:39,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:32:39,271 INFO L93 Difference]: Finished difference Result 104 states and 220 transitions. [2021-06-05 04:32:39,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:32:39,272 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 04:32:39,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:32:39,272 INFO L225 Difference]: With dead ends: 104 [2021-06-05 04:32:39,272 INFO L226 Difference]: Without dead ends: 98 [2021-06-05 04:32:39,272 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 252.1ms TimeCoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:32:39,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-06-05 04:32:39,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 94. [2021-06-05 04:32:39,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 2.193548387096774) internal successors, (204), 93 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:39,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 204 transitions. [2021-06-05 04:32:39,273 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 204 transitions. Word has length 17 [2021-06-05 04:32:39,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:32:39,273 INFO L482 AbstractCegarLoop]: Abstraction has 94 states and 204 transitions. [2021-06-05 04:32:39,273 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 04:32:39,273 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 204 transitions. [2021-06-05 04:32:39,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:32:39,274 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:32:39,274 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:32:39,474 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable598 [2021-06-05 04:32:39,474 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:32:39,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:32:39,474 INFO L82 PathProgramCache]: Analyzing trace with hash -397838954, now seen corresponding path program 112 times [2021-06-05 04:32:39,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:32:39,475 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287067269] [2021-06-05 04:32:39,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:32:39,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:32:39,537 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:32:39,537 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:32:39,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287067269] [2021-06-05 04:32:39,537 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287067269] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:39,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [912258580] [2021-06-05 04:32:39,537 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 04:32:39,568 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:32:39,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:32:39,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:32:39,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:32:39,675 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 04:32:39,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [912258580] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:39,676 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:32:39,676 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:32:39,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197007626] [2021-06-05 04:32:39,676 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:32:39,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:32:39,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:32:39,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:32:39,676 INFO L87 Difference]: Start difference. First operand 94 states and 204 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:39,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:32:39,762 INFO L93 Difference]: Finished difference Result 116 states and 248 transitions. [2021-06-05 04:32:39,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:32:39,762 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 04:32:39,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:32:39,763 INFO L225 Difference]: With dead ends: 116 [2021-06-05 04:32:39,763 INFO L226 Difference]: Without dead ends: 116 [2021-06-05 04:32:39,763 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 118.1ms TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:32:39,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-06-05 04:32:39,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 94. [2021-06-05 04:32:39,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 2.193548387096774) internal successors, (204), 93 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:39,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 204 transitions. [2021-06-05 04:32:39,764 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 204 transitions. Word has length 17 [2021-06-05 04:32:39,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:32:39,764 INFO L482 AbstractCegarLoop]: Abstraction has 94 states and 204 transitions. [2021-06-05 04:32:39,764 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 04:32:39,764 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 204 transitions. [2021-06-05 04:32:39,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:32:39,764 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:32:39,764 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:32:39,965 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable604,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:32:39,965 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:32:39,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:32:39,965 INFO L82 PathProgramCache]: Analyzing trace with hash -1183892974, now seen corresponding path program 113 times [2021-06-05 04:32:39,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:32:39,965 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383855933] [2021-06-05 04:32:39,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:32:39,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:32:40,031 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 04:32:40,032 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:32:40,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383855933] [2021-06-05 04:32:40,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383855933] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:40,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869240321] [2021-06-05 04:32:40,032 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:32:40,054 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:32:40,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:32:40,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:32:40,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:32:40,150 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:40,150 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:40,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:32:40,152 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:32:40,154 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:40,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:32:40,155 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:32:40,193 INFO L628 ElimStorePlain]: treesize reduction 60, result has 38.8 percent of original size [2021-06-05 04:32:40,195 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 7 treesize of output 5 [2021-06-05 04:32:40,196 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:32:40,208 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:32:40,208 INFO L518 ElimStorePlain]: Eliminatee v_prenex_109 vanished before elimination [2021-06-05 04:32:40,208 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 04:32:40,215 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 04:32:40,215 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-06-05 04:32:40,243 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 04:32:40,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1869240321] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:40,243 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:32:40,243 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:32:40,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119726738] [2021-06-05 04:32:40,243 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:32:40,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:32:40,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:32:40,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:32:40,244 INFO L87 Difference]: Start difference. First operand 94 states and 204 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:40,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:32:40,432 INFO L93 Difference]: Finished difference Result 124 states and 255 transitions. [2021-06-05 04:32:40,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:32:40,432 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 04:32:40,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:32:40,433 INFO L225 Difference]: With dead ends: 124 [2021-06-05 04:32:40,433 INFO L226 Difference]: Without dead ends: 121 [2021-06-05 04:32:40,433 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 207.1ms TimeCoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:32:40,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-06-05 04:32:40,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 99. [2021-06-05 04:32:40,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 2.204081632653061) internal successors, (216), 98 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:40,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 216 transitions. [2021-06-05 04:32:40,434 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 216 transitions. Word has length 17 [2021-06-05 04:32:40,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:32:40,434 INFO L482 AbstractCegarLoop]: Abstraction has 99 states and 216 transitions. [2021-06-05 04:32:40,434 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 04:32:40,434 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 216 transitions. [2021-06-05 04:32:40,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:32:40,434 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:32:40,434 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:32:40,635 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable608,114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:32:40,635 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:32:40,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:32:40,635 INFO L82 PathProgramCache]: Analyzing trace with hash -1407824442, now seen corresponding path program 114 times [2021-06-05 04:32:40,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:32:40,635 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506476882] [2021-06-05 04:32:40,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:32:40,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:32:40,699 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:32:40,699 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:32:40,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506476882] [2021-06-05 04:32:40,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506476882] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:40,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074965317] [2021-06-05 04:32:40,700 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:32:40,723 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:32:40,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:32:40,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:32:40,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:32:40,886 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 04:32:40,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1074965317] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:40,886 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:32:40,886 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 04:32:40,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448759606] [2021-06-05 04:32:40,886 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:32:40,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:32:40,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:32:40,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:32:40,887 INFO L87 Difference]: Start difference. First operand 99 states and 216 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:41,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:32:41,097 INFO L93 Difference]: Finished difference Result 148 states and 306 transitions. [2021-06-05 04:32:41,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:32:41,097 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:32:41,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:32:41,097 INFO L225 Difference]: With dead ends: 148 [2021-06-05 04:32:41,097 INFO L226 Difference]: Without dead ends: 148 [2021-06-05 04:32:41,097 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 213.1ms TimeCoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:32:41,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-06-05 04:32:41,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 99. [2021-06-05 04:32:41,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 2.204081632653061) internal successors, (216), 98 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:41,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 216 transitions. [2021-06-05 04:32:41,098 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 216 transitions. Word has length 17 [2021-06-05 04:32:41,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:32:41,099 INFO L482 AbstractCegarLoop]: Abstraction has 99 states and 216 transitions. [2021-06-05 04:32:41,099 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 04:32:41,099 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 216 transitions. [2021-06-05 04:32:41,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:32:41,099 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:32:41,099 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:32:41,299 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable616,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:32:41,299 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:32:41,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:32:41,300 INFO L82 PathProgramCache]: Analyzing trace with hash 1476352022, now seen corresponding path program 115 times [2021-06-05 04:32:41,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:32:41,300 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729403287] [2021-06-05 04:32:41,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:32:41,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:32:41,376 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 04:32:41,376 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:32:41,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729403287] [2021-06-05 04:32:41,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729403287] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:41,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87523735] [2021-06-05 04:32:41,376 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:32:41,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:32:41,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:32:41,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:32:41,545 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 04:32:41,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [87523735] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:41,545 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:32:41,545 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:32:41,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075566979] [2021-06-05 04:32:41,545 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:32:41,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:32:41,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:32:41,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:32:41,546 INFO L87 Difference]: Start difference. First operand 99 states and 216 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:41,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:32:41,675 INFO L93 Difference]: Finished difference Result 124 states and 263 transitions. [2021-06-05 04:32:41,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:32:41,675 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 04:32:41,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:32:41,676 INFO L225 Difference]: With dead ends: 124 [2021-06-05 04:32:41,676 INFO L226 Difference]: Without dead ends: 122 [2021-06-05 04:32:41,676 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 175.9ms TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:32:41,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-06-05 04:32:41,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 99. [2021-06-05 04:32:41,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 2.193877551020408) internal successors, (215), 98 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:41,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 215 transitions. [2021-06-05 04:32:41,677 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 215 transitions. Word has length 17 [2021-06-05 04:32:41,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:32:41,677 INFO L482 AbstractCegarLoop]: Abstraction has 99 states and 215 transitions. [2021-06-05 04:32:41,677 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 04:32:41,677 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 215 transitions. [2021-06-05 04:32:41,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:32:41,677 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:32:41,677 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:32:41,877 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable628 [2021-06-05 04:32:41,878 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:32:41,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:32:41,878 INFO L82 PathProgramCache]: Analyzing trace with hash -47707702, now seen corresponding path program 116 times [2021-06-05 04:32:41,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:32:41,878 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453305171] [2021-06-05 04:32:41,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:32:41,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:32:41,963 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:32:41,963 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:32:41,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453305171] [2021-06-05 04:32:41,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453305171] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:41,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1902600928] [2021-06-05 04:32:41,964 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:32:41,986 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:32:41,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:32:41,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:32:41,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:32:42,082 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:42,082 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:42,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:32:42,084 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:32:42,086 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:42,086 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 16 treesize of output 12 [2021-06-05 04:32:42,087 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:32:42,123 INFO L628 ElimStorePlain]: treesize reduction 60, result has 38.8 percent of original size [2021-06-05 04:32:42,124 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 04:32:42,126 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 04:32:42,126 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:32:42,139 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:32:42,139 INFO L518 ElimStorePlain]: Eliminatee v_prenex_112 vanished before elimination [2021-06-05 04:32:42,140 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 04:32:42,140 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-06-05 04:32:42,163 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:32:42,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1902600928] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:42,163 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:32:42,163 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:32:42,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037915204] [2021-06-05 04:32:42,163 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:32:42,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:32:42,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:32:42,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:32:42,164 INFO L87 Difference]: Start difference. First operand 99 states and 215 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:42,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:32:42,316 INFO L93 Difference]: Finished difference Result 107 states and 230 transitions. [2021-06-05 04:32:42,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:32:42,316 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 04:32:42,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:32:42,316 INFO L225 Difference]: With dead ends: 107 [2021-06-05 04:32:42,316 INFO L226 Difference]: Without dead ends: 107 [2021-06-05 04:32:42,316 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 192.7ms TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:32:42,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-06-05 04:32:42,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 93. [2021-06-05 04:32:42,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 2.1956521739130435) internal successors, (202), 92 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:42,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 202 transitions. [2021-06-05 04:32:42,317 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 202 transitions. Word has length 17 [2021-06-05 04:32:42,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:32:42,318 INFO L482 AbstractCegarLoop]: Abstraction has 93 states and 202 transitions. [2021-06-05 04:32:42,318 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 04:32:42,318 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 202 transitions. [2021-06-05 04:32:42,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:32:42,318 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:32:42,318 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:32:42,518 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable639,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:32:42,518 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:32:42,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:32:42,519 INFO L82 PathProgramCache]: Analyzing trace with hash 1004290202, now seen corresponding path program 117 times [2021-06-05 04:32:42,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:32:42,519 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066256669] [2021-06-05 04:32:42,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:32:42,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:32:42,588 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 04:32:42,588 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:32:42,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066256669] [2021-06-05 04:32:42,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066256669] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:42,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127401228] [2021-06-05 04:32:42,588 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:32:42,611 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:32:42,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:32:42,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:32:42,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:32:42,700 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:42,701 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:42,701 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 04:32:42,702 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:32:42,704 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:42,704 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:42,704 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 04:32:42,705 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:32:42,707 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:42,707 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:42,708 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 17 treesize of output 13 [2021-06-05 04:32:42,709 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:32:42,710 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:42,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:32:42,711 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:32:42,743 INFO L628 ElimStorePlain]: treesize reduction 53, result has 36.9 percent of original size [2021-06-05 04:32:42,743 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 04:32:42,744 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 04:32:42,744 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:121, output treesize:15 [2021-06-05 04:32:42,774 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 04:32:42,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [127401228] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:42,775 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:32:42,775 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:32:42,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468175970] [2021-06-05 04:32:42,775 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:32:42,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:32:42,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:32:42,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:32:42,775 INFO L87 Difference]: Start difference. First operand 93 states and 202 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:42,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:32:42,970 INFO L93 Difference]: Finished difference Result 135 states and 276 transitions. [2021-06-05 04:32:42,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:32:42,971 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 04:32:42,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:32:42,971 INFO L225 Difference]: With dead ends: 135 [2021-06-05 04:32:42,971 INFO L226 Difference]: Without dead ends: 132 [2021-06-05 04:32:42,971 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 234.2ms TimeCoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:32:42,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-06-05 04:32:42,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 100. [2021-06-05 04:32:42,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 2.212121212121212) internal successors, (219), 99 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:42,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 219 transitions. [2021-06-05 04:32:42,973 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 219 transitions. Word has length 17 [2021-06-05 04:32:42,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:32:42,973 INFO L482 AbstractCegarLoop]: Abstraction has 100 states and 219 transitions. [2021-06-05 04:32:42,973 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 04:32:42,973 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 219 transitions. [2021-06-05 04:32:42,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:32:42,973 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:32:42,973 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:32:43,188 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable646 [2021-06-05 04:32:43,189 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:32:43,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:32:43,189 INFO L82 PathProgramCache]: Analyzing trace with hash 780358734, now seen corresponding path program 118 times [2021-06-05 04:32:43,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:32:43,189 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131651342] [2021-06-05 04:32:43,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:32:43,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:32:43,277 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:32:43,277 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:32:43,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131651342] [2021-06-05 04:32:43,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131651342] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:43,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518059568] [2021-06-05 04:32:43,278 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:32:43,300 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:32:43,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:32:43,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:32:43,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:32:43,408 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 04:32:43,408 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [518059568] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:43,408 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:32:43,408 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 04:32:43,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769713195] [2021-06-05 04:32:43,408 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:32:43,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:32:43,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:32:43,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:32:43,409 INFO L87 Difference]: Start difference. First operand 100 states and 219 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:43,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:32:43,611 INFO L93 Difference]: Finished difference Result 127 states and 264 transitions. [2021-06-05 04:32:43,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:32:43,611 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:32:43,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:32:43,612 INFO L225 Difference]: With dead ends: 127 [2021-06-05 04:32:43,612 INFO L226 Difference]: Without dead ends: 127 [2021-06-05 04:32:43,612 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 256.4ms TimeCoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:32:43,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-06-05 04:32:43,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 100. [2021-06-05 04:32:43,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 2.212121212121212) internal successors, (219), 99 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:43,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 219 transitions. [2021-06-05 04:32:43,613 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 219 transitions. Word has length 17 [2021-06-05 04:32:43,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:32:43,613 INFO L482 AbstractCegarLoop]: Abstraction has 100 states and 219 transitions. [2021-06-05 04:32:43,613 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 04:32:43,613 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 219 transitions. [2021-06-05 04:32:43,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:32:43,613 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:32:43,613 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:32:43,814 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable657 [2021-06-05 04:32:43,814 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:32:43,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:32:43,814 INFO L82 PathProgramCache]: Analyzing trace with hash 2140475474, now seen corresponding path program 119 times [2021-06-05 04:32:43,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:32:43,814 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804317711] [2021-06-05 04:32:43,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:32:43,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:32:43,874 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 04:32:43,874 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:32:43,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804317711] [2021-06-05 04:32:43,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804317711] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:43,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141110329] [2021-06-05 04:32:43,874 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:32:43,898 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:32:43,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:32:43,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:32:43,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:32:43,985 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:43,986 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:43,986 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 04:32:43,987 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:32:43,989 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:43,989 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:43,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:32:43,991 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:32:43,993 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:43,993 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:43,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:32:43,994 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:32:43,996 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:43,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:32:43,997 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:32:44,028 INFO L628 ElimStorePlain]: treesize reduction 53, result has 36.9 percent of original size [2021-06-05 04:32:44,028 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 04:32:44,029 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 04:32:44,029 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:121, output treesize:15 [2021-06-05 04:32:44,061 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 04:32:44,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1141110329] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:44,061 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:32:44,061 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:32:44,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655610424] [2021-06-05 04:32:44,061 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:32:44,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:32:44,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:32:44,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:32:44,062 INFO L87 Difference]: Start difference. First operand 100 states and 219 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:44,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:32:44,269 INFO L93 Difference]: Finished difference Result 138 states and 285 transitions. [2021-06-05 04:32:44,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:32:44,270 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 04:32:44,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:32:44,270 INFO L225 Difference]: With dead ends: 138 [2021-06-05 04:32:44,270 INFO L226 Difference]: Without dead ends: 138 [2021-06-05 04:32:44,270 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 232.6ms TimeCoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:32:44,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-06-05 04:32:44,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 99. [2021-06-05 04:32:44,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 2.2142857142857144) internal successors, (217), 98 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:44,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 217 transitions. [2021-06-05 04:32:44,271 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 217 transitions. Word has length 17 [2021-06-05 04:32:44,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:32:44,271 INFO L482 AbstractCegarLoop]: Abstraction has 99 states and 217 transitions. [2021-06-05 04:32:44,271 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 04:32:44,271 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 217 transitions. [2021-06-05 04:32:44,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:32:44,272 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:32:44,272 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:32:44,472 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable667 [2021-06-05 04:32:44,472 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:32:44,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:32:44,472 INFO L82 PathProgramCache]: Analyzing trace with hash -92576520, now seen corresponding path program 120 times [2021-06-05 04:32:44,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:32:44,473 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869312555] [2021-06-05 04:32:44,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:32:44,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:32:44,538 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 04:32:44,539 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:32:44,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869312555] [2021-06-05 04:32:44,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869312555] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:44,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377928941] [2021-06-05 04:32:44,539 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:32:44,562 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 04:32:44,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:32:44,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 04:32:44,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:32:44,656 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 04:32:44,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1377928941] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:44,656 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:32:44,656 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:32:44,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774445065] [2021-06-05 04:32:44,657 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:32:44,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:32:44,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:32:44,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:32:44,657 INFO L87 Difference]: Start difference. First operand 99 states and 217 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:44,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:32:44,772 INFO L93 Difference]: Finished difference Result 106 states and 227 transitions. [2021-06-05 04:32:44,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:32:44,773 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 04:32:44,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:32:44,773 INFO L225 Difference]: With dead ends: 106 [2021-06-05 04:32:44,773 INFO L226 Difference]: Without dead ends: 102 [2021-06-05 04:32:44,773 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 164.5ms TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:32:44,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-06-05 04:32:44,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 99. [2021-06-05 04:32:44,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 2.204081632653061) internal successors, (216), 98 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:44,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 216 transitions. [2021-06-05 04:32:44,775 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 216 transitions. Word has length 17 [2021-06-05 04:32:44,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:32:44,775 INFO L482 AbstractCegarLoop]: Abstraction has 99 states and 216 transitions. [2021-06-05 04:32:44,775 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 04:32:44,775 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 216 transitions. [2021-06-05 04:32:44,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:32:44,775 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:32:44,775 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:32:44,988 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable679,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:32:44,989 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:32:44,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:32:44,989 INFO L82 PathProgramCache]: Analyzing trace with hash -5695286, now seen corresponding path program 121 times [2021-06-05 04:32:44,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:32:44,989 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507282155] [2021-06-05 04:32:44,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:32:44,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:32:45,058 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 04:32:45,058 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:32:45,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507282155] [2021-06-05 04:32:45,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507282155] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:45,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066796024] [2021-06-05 04:32:45,058 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 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 04:32:45,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:32:45,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:32:45,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:32:45,162 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:45,162 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:45,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:32:45,163 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:32:45,165 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:45,165 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 04:32:45,166 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:32:45,180 INFO L628 ElimStorePlain]: treesize reduction 29, result has 32.6 percent of original size [2021-06-05 04:32:45,180 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 04:32:45,181 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 04:32:45,181 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:57, output treesize:6 [2021-06-05 04:32:45,186 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 04:32:45,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1066796024] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:45,187 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:32:45,187 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:32:45,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129151579] [2021-06-05 04:32:45,187 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:32:45,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:32:45,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:32:45,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:32:45,187 INFO L87 Difference]: Start difference. First operand 99 states and 216 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:45,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:32:45,288 INFO L93 Difference]: Finished difference Result 115 states and 246 transitions. [2021-06-05 04:32:45,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:32:45,289 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 04:32:45,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:32:45,289 INFO L225 Difference]: With dead ends: 115 [2021-06-05 04:32:45,289 INFO L226 Difference]: Without dead ends: 115 [2021-06-05 04:32:45,289 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 145.0ms TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:32:45,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-06-05 04:32:45,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 92. [2021-06-05 04:32:45,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 2.197802197802198) internal successors, (200), 91 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:45,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 200 transitions. [2021-06-05 04:32:45,290 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 200 transitions. Word has length 17 [2021-06-05 04:32:45,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:32:45,291 INFO L482 AbstractCegarLoop]: Abstraction has 92 states and 200 transitions. [2021-06-05 04:32:45,291 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 04:32:45,291 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 200 transitions. [2021-06-05 04:32:45,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:32:45,291 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:32:45,291 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:32:45,496 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable683 [2021-06-05 04:32:45,497 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:32:45,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:32:45,497 INFO L82 PathProgramCache]: Analyzing trace with hash 118491922, now seen corresponding path program 122 times [2021-06-05 04:32:45,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:32:45,497 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119461546] [2021-06-05 04:32:45,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:32:45,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:32:45,567 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 04:32:45,568 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:32:45,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119461546] [2021-06-05 04:32:45,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119461546] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:45,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323668110] [2021-06-05 04:32:45,568 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:32:45,591 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:32:45,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:32:45,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:32:45,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:32:45,685 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:45,686 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:45,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:32:45,687 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:32:45,689 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:45,689 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:45,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:32:45,690 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:32:45,692 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:45,693 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:45,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:32:45,694 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:32:45,695 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:45,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:32:45,696 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:32:45,728 INFO L628 ElimStorePlain]: treesize reduction 53, result has 36.9 percent of original size [2021-06-05 04:32:45,728 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 04:32:45,729 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 04:32:45,729 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:121, output treesize:15 [2021-06-05 04:32:45,754 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:32:45,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1323668110] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:45,754 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:32:45,754 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:32:45,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042441411] [2021-06-05 04:32:45,754 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:32:45,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:32:45,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:32:45,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:32:45,755 INFO L87 Difference]: Start difference. First operand 92 states and 200 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:46,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:32:46,007 INFO L93 Difference]: Finished difference Result 133 states and 273 transitions. [2021-06-05 04:32:46,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:32:46,007 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 04:32:46,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:32:46,008 INFO L225 Difference]: With dead ends: 133 [2021-06-05 04:32:46,008 INFO L226 Difference]: Without dead ends: 130 [2021-06-05 04:32:46,008 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 269.3ms TimeCoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:32:46,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-06-05 04:32:46,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 101. [2021-06-05 04:32:46,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 2.24) internal successors, (224), 100 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:46,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 224 transitions. [2021-06-05 04:32:46,010 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 224 transitions. Word has length 17 [2021-06-05 04:32:46,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:32:46,010 INFO L482 AbstractCegarLoop]: Abstraction has 101 states and 224 transitions. [2021-06-05 04:32:46,010 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 04:32:46,011 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 224 transitions. [2021-06-05 04:32:46,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:32:46,011 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:32:46,011 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:32:46,232 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable687,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:32:46,233 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:32:46,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:32:46,233 INFO L82 PathProgramCache]: Analyzing trace with hash -105439546, now seen corresponding path program 123 times [2021-06-05 04:32:46,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:32:46,233 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288598527] [2021-06-05 04:32:46,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:32:46,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:32:46,322 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 04:32:46,322 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:32:46,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288598527] [2021-06-05 04:32:46,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288598527] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:46,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435842744] [2021-06-05 04:32:46,322 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:32:46,350 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:32:46,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:32:46,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:32:46,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:32:46,459 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 04:32:46,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [435842744] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:46,460 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:32:46,460 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:32:46,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624296779] [2021-06-05 04:32:46,460 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:32:46,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:32:46,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:32:46,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:32:46,460 INFO L87 Difference]: Start difference. First operand 101 states and 224 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:46,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:32:46,676 INFO L93 Difference]: Finished difference Result 131 states and 274 transitions. [2021-06-05 04:32:46,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:32:46,676 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 04:32:46,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:32:46,676 INFO L225 Difference]: With dead ends: 131 [2021-06-05 04:32:46,676 INFO L226 Difference]: Without dead ends: 131 [2021-06-05 04:32:46,676 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 261.9ms TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:32:46,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-06-05 04:32:46,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 101. [2021-06-05 04:32:46,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 2.24) internal successors, (224), 100 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:46,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 224 transitions. [2021-06-05 04:32:46,678 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 224 transitions. Word has length 17 [2021-06-05 04:32:46,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:32:46,678 INFO L482 AbstractCegarLoop]: Abstraction has 101 states and 224 transitions. [2021-06-05 04:32:46,678 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 04:32:46,678 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 224 transitions. [2021-06-05 04:32:46,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:32:46,679 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:32:46,679 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:32:46,885 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable698 [2021-06-05 04:32:46,885 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:32:46,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:32:46,885 INFO L82 PathProgramCache]: Analyzing trace with hash -1516230378, now seen corresponding path program 124 times [2021-06-05 04:32:46,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:32:46,885 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035470315] [2021-06-05 04:32:46,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:32:46,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:32:46,966 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 04:32:46,966 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:32:46,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035470315] [2021-06-05 04:32:46,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035470315] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:46,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120295391] [2021-06-05 04:32:46,966 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 04:32:46,995 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:32:46,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:32:46,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:32:46,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:32:47,120 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 04:32:47,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1120295391] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:47,120 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:32:47,120 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:32:47,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98516203] [2021-06-05 04:32:47,120 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:32:47,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:32:47,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:32:47,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:32:47,120 INFO L87 Difference]: Start difference. First operand 101 states and 224 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:47,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:32:47,429 INFO L93 Difference]: Finished difference Result 133 states and 275 transitions. [2021-06-05 04:32:47,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:32:47,430 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:32:47,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:32:47,430 INFO L225 Difference]: With dead ends: 133 [2021-06-05 04:32:47,430 INFO L226 Difference]: Without dead ends: 131 [2021-06-05 04:32:47,430 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 342.5ms TimeCoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:32:47,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-06-05 04:32:47,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 101. [2021-06-05 04:32:47,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 2.23) internal successors, (223), 100 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:47,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 223 transitions. [2021-06-05 04:32:47,431 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 223 transitions. Word has length 17 [2021-06-05 04:32:47,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:32:47,431 INFO L482 AbstractCegarLoop]: Abstraction has 101 states and 223 transitions. [2021-06-05 04:32:47,431 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 04:32:47,432 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 223 transitions. [2021-06-05 04:32:47,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:32:47,432 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:32:47,432 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:32:47,632 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable708,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:32:47,632 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:32:47,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:32:47,632 INFO L82 PathProgramCache]: Analyzing trace with hash 1254677194, now seen corresponding path program 125 times [2021-06-05 04:32:47,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:32:47,633 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274881985] [2021-06-05 04:32:47,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:32:47,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:32:47,690 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 04:32:47,690 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:32:47,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274881985] [2021-06-05 04:32:47,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274881985] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:47,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977861950] [2021-06-05 04:32:47,691 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 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 04:32:47,725 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:32:47,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:32:47,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:32:47,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:32:47,823 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:47,824 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:47,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:32:47,825 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:32:47,827 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:47,827 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:47,828 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 17 treesize of output 13 [2021-06-05 04:32:47,829 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:32:47,831 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:47,831 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:47,831 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 04:32:47,832 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:32:47,834 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:47,834 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 04:32:47,835 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:32:47,867 INFO L628 ElimStorePlain]: treesize reduction 53, result has 36.9 percent of original size [2021-06-05 04:32:47,867 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 04:32:47,868 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 04:32:47,868 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:121, output treesize:15 [2021-06-05 04:32:47,891 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 04:32:47,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [977861950] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:47,892 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:32:47,892 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:32:47,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861933812] [2021-06-05 04:32:47,892 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:32:47,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:32:47,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:32:47,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:32:47,892 INFO L87 Difference]: Start difference. First operand 101 states and 223 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:48,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:32:48,164 INFO L93 Difference]: Finished difference Result 136 states and 281 transitions. [2021-06-05 04:32:48,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:32:48,165 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 04:32:48,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:32:48,165 INFO L225 Difference]: With dead ends: 136 [2021-06-05 04:32:48,165 INFO L226 Difference]: Without dead ends: 136 [2021-06-05 04:32:48,165 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 290.0ms TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:32:48,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-06-05 04:32:48,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 100. [2021-06-05 04:32:48,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 2.2323232323232323) internal successors, (221), 99 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:48,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 221 transitions. [2021-06-05 04:32:48,166 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 221 transitions. Word has length 17 [2021-06-05 04:32:48,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:32:48,166 INFO L482 AbstractCegarLoop]: Abstraction has 100 states and 221 transitions. [2021-06-05 04:32:48,166 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 04:32:48,166 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 221 transitions. [2021-06-05 04:32:48,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:32:48,167 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:32:48,167 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:32:48,367 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable718,126 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:32:48,367 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:32:48,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:32:48,367 INFO L82 PathProgramCache]: Analyzing trace with hash -978374800, now seen corresponding path program 126 times [2021-06-05 04:32:48,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:32:48,368 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085849163] [2021-06-05 04:32:48,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:32:48,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:32:48,451 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 04:32:48,451 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:32:48,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085849163] [2021-06-05 04:32:48,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085849163] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:48,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [447597945] [2021-06-05 04:32:48,451 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:32:48,475 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 04:32:48,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:32:48,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 04:32:48,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:32:48,576 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:32:48,576 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [447597945] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:48,576 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:32:48,576 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:32:48,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062443723] [2021-06-05 04:32:48,576 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:32:48,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:32:48,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:32:48,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:32:48,577 INFO L87 Difference]: Start difference. First operand 100 states and 221 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:48,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:32:48,726 INFO L93 Difference]: Finished difference Result 111 states and 237 transitions. [2021-06-05 04:32:48,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:32:48,727 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 04:32:48,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:32:48,727 INFO L225 Difference]: With dead ends: 111 [2021-06-05 04:32:48,727 INFO L226 Difference]: Without dead ends: 107 [2021-06-05 04:32:48,727 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 204.2ms TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:32:48,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-06-05 04:32:48,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 100. [2021-06-05 04:32:48,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 2.2222222222222223) internal successors, (220), 99 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:48,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 220 transitions. [2021-06-05 04:32:48,728 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 220 transitions. Word has length 17 [2021-06-05 04:32:48,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:32:48,728 INFO L482 AbstractCegarLoop]: Abstraction has 100 states and 220 transitions. [2021-06-05 04:32:48,728 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 04:32:48,728 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 220 transitions. [2021-06-05 04:32:48,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:32:48,728 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:32:48,729 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:32:48,929 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable730 [2021-06-05 04:32:48,929 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:32:48,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:32:48,929 INFO L82 PathProgramCache]: Analyzing trace with hash -891493566, now seen corresponding path program 127 times [2021-06-05 04:32:48,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:32:48,929 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492596548] [2021-06-05 04:32:48,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:32:48,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:32:48,985 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 04:32:48,985 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:32:48,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492596548] [2021-06-05 04:32:48,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492596548] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:48,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37946324] [2021-06-05 04:32:48,985 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:32:49,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:32:49,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:32:49,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:32:49,098 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:49,099 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:49,099 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 04:32:49,100 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:32:49,102 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:49,102 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 04:32:49,102 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:32:49,116 INFO L628 ElimStorePlain]: treesize reduction 29, result has 32.6 percent of original size [2021-06-05 04:32:49,116 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 04:32:49,117 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 04:32:49,117 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:57, output treesize:6 [2021-06-05 04:32:49,123 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 04:32:49,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [37946324] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:49,123 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:32:49,123 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:32:49,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721714356] [2021-06-05 04:32:49,123 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:32:49,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:32:49,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:32:49,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:32:49,123 INFO L87 Difference]: Start difference. First operand 100 states and 220 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:49,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:32:49,348 INFO L93 Difference]: Finished difference Result 123 states and 262 transitions. [2021-06-05 04:32:49,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:32:49,348 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 04:32:49,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:32:49,348 INFO L225 Difference]: With dead ends: 123 [2021-06-05 04:32:49,348 INFO L226 Difference]: Without dead ends: 123 [2021-06-05 04:32:49,348 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 248.3ms TimeCoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:32:49,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-06-05 04:32:49,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 99. [2021-06-05 04:32:49,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 2.2244897959183674) internal successors, (218), 98 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:49,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 218 transitions. [2021-06-05 04:32:49,350 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 218 transitions. Word has length 17 [2021-06-05 04:32:49,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:32:49,350 INFO L482 AbstractCegarLoop]: Abstraction has 99 states and 218 transitions. [2021-06-05 04:32:49,350 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 04:32:49,350 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 218 transitions. [2021-06-05 04:32:49,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:32:49,350 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:32:49,350 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:32:49,551 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable734 [2021-06-05 04:32:49,551 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:32:49,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:32:49,551 INFO L82 PathProgramCache]: Analyzing trace with hash -1484721066, now seen corresponding path program 128 times [2021-06-05 04:32:49,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:32:49,551 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435735727] [2021-06-05 04:32:49,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:32:49,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:32:49,608 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 04:32:49,608 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:32:49,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435735727] [2021-06-05 04:32:49,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435735727] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:49,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966080905] [2021-06-05 04:32:49,608 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:32:49,636 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:32:49,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:32:49,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 04:32:49,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:32:49,727 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 04:32:49,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1966080905] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:49,727 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:32:49,727 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:32:49,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518216827] [2021-06-05 04:32:49,728 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:32:49,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:32:49,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:32:49,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:32:49,728 INFO L87 Difference]: Start difference. First operand 99 states and 218 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:49,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:32:49,806 INFO L93 Difference]: Finished difference Result 108 states and 231 transitions. [2021-06-05 04:32:49,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:32:49,806 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 04:32:49,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:32:49,807 INFO L225 Difference]: With dead ends: 108 [2021-06-05 04:32:49,807 INFO L226 Difference]: Without dead ends: 102 [2021-06-05 04:32:49,807 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 129.3ms TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:32:49,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-06-05 04:32:49,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 99. [2021-06-05 04:32:49,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 2.2142857142857144) internal successors, (217), 98 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:49,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 217 transitions. [2021-06-05 04:32:49,808 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 217 transitions. Word has length 17 [2021-06-05 04:32:49,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:32:49,808 INFO L482 AbstractCegarLoop]: Abstraction has 99 states and 217 transitions. [2021-06-05 04:32:49,808 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 04:32:49,808 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 217 transitions. [2021-06-05 04:32:49,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:32:49,809 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:32:49,809 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:32:50,024 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable738 [2021-06-05 04:32:50,025 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:32:50,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:32:50,025 INFO L82 PathProgramCache]: Analyzing trace with hash 1296689610, now seen corresponding path program 129 times [2021-06-05 04:32:50,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:32:50,025 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424175000] [2021-06-05 04:32:50,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:32:50,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:32:50,094 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 04:32:50,094 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:32:50,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424175000] [2021-06-05 04:32:50,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424175000] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:50,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261216929] [2021-06-05 04:32:50,095 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:32:50,123 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:32:50,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:32:50,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 04:32:50,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:32:50,228 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:50,229 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:50,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:32:50,230 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:32:50,232 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:50,233 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 17 treesize of output 13 [2021-06-05 04:32:50,233 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:32:50,255 INFO L628 ElimStorePlain]: treesize reduction 36, result has 32.1 percent of original size [2021-06-05 04:32:50,256 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 04:32:50,257 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 04:32:50,257 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:67, output treesize:9 [2021-06-05 04:32:50,279 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 04:32:50,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1261216929] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:50,279 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:32:50,279 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 04:32:50,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508411873] [2021-06-05 04:32:50,280 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:32:50,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:32:50,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:32:50,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:32:50,280 INFO L87 Difference]: Start difference. First operand 99 states and 217 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:50,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:32:50,364 INFO L93 Difference]: Finished difference Result 111 states and 238 transitions. [2021-06-05 04:32:50,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:32:50,364 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:32:50,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:32:50,364 INFO L225 Difference]: With dead ends: 111 [2021-06-05 04:32:50,365 INFO L226 Difference]: Without dead ends: 111 [2021-06-05 04:32:50,365 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 152.4ms TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:32:50,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-06-05 04:32:50,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 94. [2021-06-05 04:32:50,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 2.204301075268817) internal successors, (205), 93 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:50,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 205 transitions. [2021-06-05 04:32:50,366 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 205 transitions. Word has length 17 [2021-06-05 04:32:50,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:32:50,366 INFO L482 AbstractCegarLoop]: Abstraction has 94 states and 205 transitions. [2021-06-05 04:32:50,366 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 04:32:50,366 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 205 transitions. [2021-06-05 04:32:50,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:32:50,367 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:32:50,367 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:32:50,576 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable742 [2021-06-05 04:32:50,577 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:32:50,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:32:50,577 INFO L82 PathProgramCache]: Analyzing trace with hash -960002918, now seen corresponding path program 130 times [2021-06-05 04:32:50,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:32:50,577 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209145912] [2021-06-05 04:32:50,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:32:50,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:32:50,652 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 04:32:50,652 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:32:50,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209145912] [2021-06-05 04:32:50,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209145912] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:50,653 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [280972542] [2021-06-05 04:32:50,653 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:32:50,679 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:32:50,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:32:50,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:32:50,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:32:50,767 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 04:32:50,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [280972542] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:50,768 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:32:50,768 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:32:50,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986248865] [2021-06-05 04:32:50,768 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:32:50,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:32:50,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:32:50,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:32:50,768 INFO L87 Difference]: Start difference. First operand 94 states and 205 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:50,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:32:50,914 INFO L93 Difference]: Finished difference Result 107 states and 225 transitions. [2021-06-05 04:32:50,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:32:50,914 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 04:32:50,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:32:50,915 INFO L225 Difference]: With dead ends: 107 [2021-06-05 04:32:50,915 INFO L226 Difference]: Without dead ends: 98 [2021-06-05 04:32:50,915 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 203.6ms TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:32:50,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-06-05 04:32:50,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 94. [2021-06-05 04:32:50,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 2.193548387096774) internal successors, (204), 93 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:50,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 204 transitions. [2021-06-05 04:32:50,916 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 204 transitions. Word has length 17 [2021-06-05 04:32:50,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:32:50,916 INFO L482 AbstractCegarLoop]: Abstraction has 94 states and 204 transitions. [2021-06-05 04:32:50,916 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 04:32:50,916 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 204 transitions. [2021-06-05 04:32:50,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:32:50,916 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:32:50,916 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:32:51,124 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable743,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:32:51,125 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:32:51,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:32:51,125 INFO L82 PathProgramCache]: Analyzing trace with hash -1409778866, now seen corresponding path program 131 times [2021-06-05 04:32:51,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:32:51,125 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481054013] [2021-06-05 04:32:51,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:32:51,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:32:51,194 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:32:51,194 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:32:51,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481054013] [2021-06-05 04:32:51,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481054013] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:51,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [329590504] [2021-06-05 04:32:51,194 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 04:32:51,241 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:32:51,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:32:51,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:32:51,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:32:51,338 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:51,339 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:51,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:32:51,340 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:32:51,341 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:51,342 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 04:32:51,342 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:32:51,356 INFO L628 ElimStorePlain]: treesize reduction 29, result has 32.6 percent of original size [2021-06-05 04:32:51,357 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 04:32:51,357 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 04:32:51,357 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:57, output treesize:6 [2021-06-05 04:32:51,371 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 04:32:51,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [329590504] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:51,371 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:32:51,371 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 04:32:51,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696648999] [2021-06-05 04:32:51,371 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:32:51,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:32:51,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:32:51,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:32:51,371 INFO L87 Difference]: Start difference. First operand 94 states and 204 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:51,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:32:51,458 INFO L93 Difference]: Finished difference Result 106 states and 228 transitions. [2021-06-05 04:32:51,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:32:51,459 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:32:51,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:32:51,459 INFO L225 Difference]: With dead ends: 106 [2021-06-05 04:32:51,459 INFO L226 Difference]: Without dead ends: 106 [2021-06-05 04:32:51,459 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 123.4ms TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:32:51,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-06-05 04:32:51,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 94. [2021-06-05 04:32:51,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 2.193548387096774) internal successors, (204), 93 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:51,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 204 transitions. [2021-06-05 04:32:51,460 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 204 transitions. Word has length 17 [2021-06-05 04:32:51,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:32:51,460 INFO L482 AbstractCegarLoop]: Abstraction has 94 states and 204 transitions. [2021-06-05 04:32:51,460 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 04:32:51,460 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 204 transitions. [2021-06-05 04:32:51,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:32:51,460 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:32:51,460 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:32:51,661 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable747,132 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:32:51,661 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:32:51,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:32:51,661 INFO L82 PathProgramCache]: Analyzing trace with hash -7649710, now seen corresponding path program 132 times [2021-06-05 04:32:51,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:32:51,661 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157010350] [2021-06-05 04:32:51,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:32:51,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:32:51,729 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 04:32:51,729 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:32:51,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157010350] [2021-06-05 04:32:51,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157010350] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:51,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750003706] [2021-06-05 04:32:51,730 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:32:51,753 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 04:32:51,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:32:51,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:32:51,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:32:51,849 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 04:32:51,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [750003706] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:51,849 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:32:51,849 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:32:51,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191320276] [2021-06-05 04:32:51,849 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:32:51,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:32:51,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:32:51,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:32:51,850 INFO L87 Difference]: Start difference. First operand 94 states and 204 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:52,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:32:52,085 INFO L93 Difference]: Finished difference Result 101 states and 214 transitions. [2021-06-05 04:32:52,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:32:52,086 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 04:32:52,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:32:52,086 INFO L225 Difference]: With dead ends: 101 [2021-06-05 04:32:52,086 INFO L226 Difference]: Without dead ends: 95 [2021-06-05 04:32:52,086 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 279.7ms TimeCoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:32:52,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-06-05 04:32:52,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2021-06-05 04:32:52,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 2.1914893617021276) internal successors, (206), 94 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:52,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 206 transitions. [2021-06-05 04:32:52,087 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 206 transitions. Word has length 17 [2021-06-05 04:32:52,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:32:52,087 INFO L482 AbstractCegarLoop]: Abstraction has 95 states and 206 transitions. [2021-06-05 04:32:52,088 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 04:32:52,088 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 206 transitions. [2021-06-05 04:32:52,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:32:52,088 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:32:52,088 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:32:52,300 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable751 [2021-06-05 04:32:52,301 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:32:52,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:32:52,301 INFO L82 PathProgramCache]: Analyzing trace with hash 1640409374, now seen corresponding path program 133 times [2021-06-05 04:32:52,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:32:52,301 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695928987] [2021-06-05 04:32:52,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:32:52,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:32:52,363 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:32:52,363 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:32:52,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695928987] [2021-06-05 04:32:52,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695928987] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:52,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60025145] [2021-06-05 04:32:52,363 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 04:32:52,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:32:52,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:32:52,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:32:52,481 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:52,481 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:52,482 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 16 treesize of output 12 [2021-06-05 04:32:52,482 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:32:52,485 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:52,485 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 04:32:52,486 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:32:52,503 INFO L628 ElimStorePlain]: treesize reduction 29, result has 32.6 percent of original size [2021-06-05 04:32:52,503 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 04:32:52,504 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 04:32:52,504 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:57, output treesize:6 [2021-06-05 04:32:52,508 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 04:32:52,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [60025145] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:52,508 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:32:52,508 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:32:52,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737045222] [2021-06-05 04:32:52,508 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:32:52,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:32:52,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:32:52,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:32:52,509 INFO L87 Difference]: Start difference. First operand 95 states and 206 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:52,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:32:52,716 INFO L93 Difference]: Finished difference Result 119 states and 254 transitions. [2021-06-05 04:32:52,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:32:52,717 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 04:32:52,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:32:52,717 INFO L225 Difference]: With dead ends: 119 [2021-06-05 04:32:52,717 INFO L226 Difference]: Without dead ends: 119 [2021-06-05 04:32:52,717 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 249.2ms TimeCoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:32:52,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-06-05 04:32:52,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 95. [2021-06-05 04:32:52,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 2.1914893617021276) internal successors, (206), 94 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:52,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 206 transitions. [2021-06-05 04:32:52,718 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 206 transitions. Word has length 17 [2021-06-05 04:32:52,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:32:52,718 INFO L482 AbstractCegarLoop]: Abstraction has 95 states and 206 transitions. [2021-06-05 04:32:52,718 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 04:32:52,718 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 206 transitions. [2021-06-05 04:32:52,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:32:52,719 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:32:52,719 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:32:52,932 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable755 [2021-06-05 04:32:52,933 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:32:52,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:32:52,933 INFO L82 PathProgramCache]: Analyzing trace with hash 854355354, now seen corresponding path program 134 times [2021-06-05 04:32:52,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:32:52,933 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171314244] [2021-06-05 04:32:52,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:32:52,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:32:53,021 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 04:32:53,021 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:32:53,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171314244] [2021-06-05 04:32:53,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171314244] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:53,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1430230312] [2021-06-05 04:32:53,021 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:32:53,050 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:32:53,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:32:53,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:32:53,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:32:53,170 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 04:32:53,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1430230312] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:53,171 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:32:53,171 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:32:53,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108271894] [2021-06-05 04:32:53,171 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:32:53,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:32:53,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:32:53,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:32:53,171 INFO L87 Difference]: Start difference. First operand 95 states and 206 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:53,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:32:53,464 INFO L93 Difference]: Finished difference Result 121 states and 248 transitions. [2021-06-05 04:32:53,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:32:53,464 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 04:32:53,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:32:53,464 INFO L225 Difference]: With dead ends: 121 [2021-06-05 04:32:53,464 INFO L226 Difference]: Without dead ends: 118 [2021-06-05 04:32:53,464 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 321.9ms TimeCoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:32:53,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-06-05 04:32:53,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 100. [2021-06-05 04:32:53,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 2.202020202020202) internal successors, (218), 99 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:53,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 218 transitions. [2021-06-05 04:32:53,465 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 218 transitions. Word has length 17 [2021-06-05 04:32:53,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:32:53,465 INFO L482 AbstractCegarLoop]: Abstraction has 100 states and 218 transitions. [2021-06-05 04:32:53,465 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 04:32:53,466 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 218 transitions. [2021-06-05 04:32:53,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:32:53,466 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:32:53,466 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:32:53,666 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable759,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:32:53,667 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:32:53,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:32:53,667 INFO L82 PathProgramCache]: Analyzing trace with hash 630423886, now seen corresponding path program 135 times [2021-06-05 04:32:53,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:32:53,667 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536886525] [2021-06-05 04:32:53,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:32:53,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:32:53,726 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:32:53,726 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:32:53,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536886525] [2021-06-05 04:32:53,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536886525] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:53,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068262857] [2021-06-05 04:32:53,727 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:32:53,752 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:32:53,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:32:53,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:32:53,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:32:53,854 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:53,854 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:53,855 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 04:32:53,855 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:32:53,858 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:53,858 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:53,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:32:53,859 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:32:53,861 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:53,862 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:53,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:32:53,863 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:32:53,865 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:53,865 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 17 treesize of output 13 [2021-06-05 04:32:53,866 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:32:53,906 INFO L628 ElimStorePlain]: treesize reduction 53, result has 36.9 percent of original size [2021-06-05 04:32:53,906 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 04:32:53,907 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 04:32:53,907 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:121, output treesize:15 [2021-06-05 04:32:53,954 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 04:32:53,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1068262857] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:53,954 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:32:53,954 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 04:32:53,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996057920] [2021-06-05 04:32:53,954 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:32:53,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:32:53,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:32:53,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:32:53,955 INFO L87 Difference]: Start difference. First operand 100 states and 218 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:54,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:32:54,376 INFO L93 Difference]: Finished difference Result 140 states and 289 transitions. [2021-06-05 04:32:54,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:32:54,376 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:32:54,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:32:54,376 INFO L225 Difference]: With dead ends: 140 [2021-06-05 04:32:54,376 INFO L226 Difference]: Without dead ends: 140 [2021-06-05 04:32:54,376 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 398.1ms TimeCoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:32:54,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-06-05 04:32:54,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 100. [2021-06-05 04:32:54,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 2.202020202020202) internal successors, (218), 99 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:54,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 218 transitions. [2021-06-05 04:32:54,378 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 218 transitions. Word has length 17 [2021-06-05 04:32:54,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:32:54,378 INFO L482 AbstractCegarLoop]: Abstraction has 100 states and 218 transitions. [2021-06-05 04:32:54,378 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 04:32:54,378 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 218 transitions. [2021-06-05 04:32:54,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:32:54,378 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:32:54,378 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:32:54,578 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable771 [2021-06-05 04:32:54,578 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:32:54,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:32:54,579 INFO L82 PathProgramCache]: Analyzing trace with hash -780366946, now seen corresponding path program 136 times [2021-06-05 04:32:54,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:32:54,579 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747294588] [2021-06-05 04:32:54,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:32:54,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:32:54,634 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:32:54,634 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:32:54,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747294588] [2021-06-05 04:32:54,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747294588] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:54,635 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957018229] [2021-06-05 04:32:54,635 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 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 04:32:54,657 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:32:54,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:32:54,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:32:54,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:32:54,756 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:54,756 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:54,756 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 16 treesize of output 12 [2021-06-05 04:32:54,757 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:32:54,759 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:54,760 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:54,760 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 04:32:54,760 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:32:54,762 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:54,763 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:54,763 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 15 treesize of output 11 [2021-06-05 04:32:54,764 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:32:54,765 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:54,766 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 17 treesize of output 13 [2021-06-05 04:32:54,767 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:32:54,798 INFO L628 ElimStorePlain]: treesize reduction 53, result has 36.9 percent of original size [2021-06-05 04:32:54,798 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 04:32:54,799 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 04:32:54,799 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:121, output treesize:15 [2021-06-05 04:32:54,823 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 04:32:54,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [957018229] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:54,823 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:32:54,823 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:32:54,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141777339] [2021-06-05 04:32:54,823 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:32:54,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:32:54,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:32:54,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:32:54,824 INFO L87 Difference]: Start difference. First operand 100 states and 218 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:55,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:32:55,092 INFO L93 Difference]: Finished difference Result 117 states and 248 transitions. [2021-06-05 04:32:55,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:32:55,092 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 04:32:55,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:32:55,092 INFO L225 Difference]: With dead ends: 117 [2021-06-05 04:32:55,093 INFO L226 Difference]: Without dead ends: 115 [2021-06-05 04:32:55,093 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 291.4ms TimeCoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:32:55,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-06-05 04:32:55,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 100. [2021-06-05 04:32:55,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 2.191919191919192) internal successors, (217), 99 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:55,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 217 transitions. [2021-06-05 04:32:55,094 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 217 transitions. Word has length 17 [2021-06-05 04:32:55,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:32:55,094 INFO L482 AbstractCegarLoop]: Abstraction has 100 states and 217 transitions. [2021-06-05 04:32:55,094 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 04:32:55,094 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 217 transitions. [2021-06-05 04:32:55,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:32:55,094 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:32:55,094 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:32:55,295 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable783 [2021-06-05 04:32:55,295 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:32:55,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:32:55,295 INFO L82 PathProgramCache]: Analyzing trace with hash 1990540626, now seen corresponding path program 137 times [2021-06-05 04:32:55,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:32:55,295 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007932928] [2021-06-05 04:32:55,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:32:55,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:32:55,384 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 04:32:55,384 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:32:55,384 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007932928] [2021-06-05 04:32:55,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007932928] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:55,385 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539821641] [2021-06-05 04:32:55,385 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 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 04:32:55,416 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:32:55,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:32:55,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:32:55,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:32:55,561 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 04:32:55,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [539821641] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:55,562 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:32:55,562 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:32:55,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250255456] [2021-06-05 04:32:55,562 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:32:55,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:32:55,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:32:55,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:32:55,562 INFO L87 Difference]: Start difference. First operand 100 states and 217 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:55,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:32:55,796 INFO L93 Difference]: Finished difference Result 104 states and 223 transitions. [2021-06-05 04:32:55,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:32:55,796 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 04:32:55,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:32:55,796 INFO L225 Difference]: With dead ends: 104 [2021-06-05 04:32:55,796 INFO L226 Difference]: Without dead ends: 104 [2021-06-05 04:32:55,796 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 299.1ms TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:32:55,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-06-05 04:32:55,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 93. [2021-06-05 04:32:55,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 2.1956521739130435) internal successors, (202), 92 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:55,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 202 transitions. [2021-06-05 04:32:55,797 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 202 transitions. Word has length 17 [2021-06-05 04:32:55,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:32:55,797 INFO L482 AbstractCegarLoop]: Abstraction has 93 states and 202 transitions. [2021-06-05 04:32:55,798 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 04:32:55,798 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 202 transitions. [2021-06-05 04:32:55,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:32:55,798 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:32:55,798 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:32:56,022 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable796 [2021-06-05 04:32:56,022 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:32:56,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:32:56,022 INFO L82 PathProgramCache]: Analyzing trace with hash -893447990, now seen corresponding path program 138 times [2021-06-05 04:32:56,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:32:56,023 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36339710] [2021-06-05 04:32:56,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:32:56,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:32:56,088 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 04:32:56,089 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:32:56,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36339710] [2021-06-05 04:32:56,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36339710] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:56,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981851711] [2021-06-05 04:32:56,089 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:32:56,112 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 04:32:56,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:32:56,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:32:56,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:32:56,197 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 04:32:56,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1981851711] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:56,197 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:32:56,197 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:32:56,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286724158] [2021-06-05 04:32:56,197 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:32:56,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:32:56,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:32:56,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:32:56,198 INFO L87 Difference]: Start difference. First operand 93 states and 202 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:56,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:32:56,371 INFO L93 Difference]: Finished difference Result 99 states and 209 transitions. [2021-06-05 04:32:56,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:32:56,372 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 04:32:56,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:32:56,372 INFO L225 Difference]: With dead ends: 99 [2021-06-05 04:32:56,372 INFO L226 Difference]: Without dead ends: 93 [2021-06-05 04:32:56,372 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 220.5ms TimeCoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:32:56,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-06-05 04:32:56,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 92. [2021-06-05 04:32:56,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 2.1868131868131866) internal successors, (199), 91 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:56,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 199 transitions. [2021-06-05 04:32:56,373 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 199 transitions. Word has length 17 [2021-06-05 04:32:56,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:32:56,373 INFO L482 AbstractCegarLoop]: Abstraction has 92 states and 199 transitions. [2021-06-05 04:32:56,373 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 04:32:56,373 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 199 transitions. [2021-06-05 04:32:56,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:32:56,373 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:32:56,373 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:32:56,574 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable808,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:32:56,574 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:32:56,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:32:56,574 INFO L82 PathProgramCache]: Analyzing trace with hash 754611094, now seen corresponding path program 139 times [2021-06-05 04:32:56,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:32:56,574 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433728012] [2021-06-05 04:32:56,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:32:56,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:32:56,634 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:32:56,634 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:32:56,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433728012] [2021-06-05 04:32:56,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433728012] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:56,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539833584] [2021-06-05 04:32:56,634 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:32:56,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:32:56,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:32:56,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:32:56,740 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:56,741 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:56,741 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 16 treesize of output 12 [2021-06-05 04:32:56,742 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:32:56,744 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:56,744 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 15 treesize of output 11 [2021-06-05 04:32:56,744 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:32:56,758 INFO L628 ElimStorePlain]: treesize reduction 29, result has 32.6 percent of original size [2021-06-05 04:32:56,758 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 04:32:56,759 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 04:32:56,759 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:57, output treesize:6 [2021-06-05 04:32:56,772 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 04:32:56,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [539833584] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:56,772 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:32:56,772 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 04:32:56,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736056698] [2021-06-05 04:32:56,772 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:32:56,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:32:56,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:32:56,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:32:56,773 INFO L87 Difference]: Start difference. First operand 92 states and 199 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:56,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:32:56,892 INFO L93 Difference]: Finished difference Result 111 states and 237 transitions. [2021-06-05 04:32:56,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:32:56,892 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:32:56,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:32:56,892 INFO L225 Difference]: With dead ends: 111 [2021-06-05 04:32:56,892 INFO L226 Difference]: Without dead ends: 111 [2021-06-05 04:32:56,892 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 145.3ms TimeCoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:32:56,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-06-05 04:32:56,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 93. [2021-06-05 04:32:56,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 2.1847826086956523) internal successors, (201), 92 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:56,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 201 transitions. [2021-06-05 04:32:56,893 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 201 transitions. Word has length 17 [2021-06-05 04:32:56,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:32:56,893 INFO L482 AbstractCegarLoop]: Abstraction has 93 states and 201 transitions. [2021-06-05 04:32:56,893 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 04:32:56,894 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 201 transitions. [2021-06-05 04:32:56,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:32:56,894 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:32:56,894 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:32:57,094 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable812,140 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:32:57,094 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:32:57,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:32:57,094 INFO L82 PathProgramCache]: Analyzing trace with hash -31442926, now seen corresponding path program 140 times [2021-06-05 04:32:57,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:32:57,095 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217327495] [2021-06-05 04:32:57,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:32:57,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:32:57,169 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 04:32:57,169 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:32:57,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217327495] [2021-06-05 04:32:57,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217327495] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:57,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707484590] [2021-06-05 04:32:57,169 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 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 04:32:57,192 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:32:57,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:32:57,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:32:57,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:32:57,296 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 04:32:57,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [707484590] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:57,297 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:32:57,297 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:32:57,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958581740] [2021-06-05 04:32:57,297 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:32:57,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:32:57,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:32:57,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:32:57,297 INFO L87 Difference]: Start difference. First operand 93 states and 201 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:57,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:32:57,537 INFO L93 Difference]: Finished difference Result 117 states and 239 transitions. [2021-06-05 04:32:57,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:32:57,537 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 04:32:57,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:32:57,538 INFO L225 Difference]: With dead ends: 117 [2021-06-05 04:32:57,538 INFO L226 Difference]: Without dead ends: 114 [2021-06-05 04:32:57,538 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 264.7ms TimeCoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:32:57,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-06-05 04:32:57,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 98. [2021-06-05 04:32:57,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 2.185567010309278) internal successors, (212), 97 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:57,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 212 transitions. [2021-06-05 04:32:57,539 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 212 transitions. Word has length 17 [2021-06-05 04:32:57,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:32:57,539 INFO L482 AbstractCegarLoop]: Abstraction has 98 states and 212 transitions. [2021-06-05 04:32:57,539 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 04:32:57,539 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 212 transitions. [2021-06-05 04:32:57,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:32:57,539 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:32:57,539 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:32:57,740 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable816,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:32:57,740 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:32:57,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:32:57,740 INFO L82 PathProgramCache]: Analyzing trace with hash -255374394, now seen corresponding path program 141 times [2021-06-05 04:32:57,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:32:57,740 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059812446] [2021-06-05 04:32:57,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:32:57,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:32:57,801 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:32:57,801 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:32:57,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059812446] [2021-06-05 04:32:57,801 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059812446] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:57,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922918777] [2021-06-05 04:32:57,801 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 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 04:32:57,825 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:32:57,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:32:57,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:32:57,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:32:57,914 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:57,915 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:57,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:32:57,916 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:32:57,919 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:57,920 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:57,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:32:57,921 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:32:57,924 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:57,925 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:57,925 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 15 treesize of output 11 [2021-06-05 04:32:57,926 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:32:57,928 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:57,929 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 16 treesize of output 12 [2021-06-05 04:32:57,929 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:32:57,962 INFO L628 ElimStorePlain]: treesize reduction 53, result has 36.9 percent of original size [2021-06-05 04:32:57,962 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 04:32:57,963 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 04:32:57,963 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:121, output treesize:15 [2021-06-05 04:32:57,997 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 04:32:57,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [922918777] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:57,998 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:32:57,998 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 04:32:57,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585290664] [2021-06-05 04:32:57,998 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:32:57,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:32:57,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:32:57,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:32:57,998 INFO L87 Difference]: Start difference. First operand 98 states and 212 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:58,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:32:58,229 INFO L93 Difference]: Finished difference Result 128 states and 272 transitions. [2021-06-05 04:32:58,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:32:58,229 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:32:58,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:32:58,229 INFO L225 Difference]: With dead ends: 128 [2021-06-05 04:32:58,229 INFO L226 Difference]: Without dead ends: 128 [2021-06-05 04:32:58,229 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 242.0ms TimeCoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:32:58,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-06-05 04:32:58,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 98. [2021-06-05 04:32:58,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 2.185567010309278) internal successors, (212), 97 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:58,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 212 transitions. [2021-06-05 04:32:58,231 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 212 transitions. Word has length 17 [2021-06-05 04:32:58,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:32:58,231 INFO L482 AbstractCegarLoop]: Abstraction has 98 states and 212 transitions. [2021-06-05 04:32:58,231 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 04:32:58,231 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 212 transitions. [2021-06-05 04:32:58,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:32:58,231 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:32:58,231 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:32:58,431 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable828,142 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:32:58,431 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:32:58,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:32:58,432 INFO L82 PathProgramCache]: Analyzing trace with hash 1104742346, now seen corresponding path program 142 times [2021-06-05 04:32:58,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:32:58,432 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382901662] [2021-06-05 04:32:58,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:32:58,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:32:58,514 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 04:32:58,514 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:32:58,514 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382901662] [2021-06-05 04:32:58,514 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382901662] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:58,514 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033613325] [2021-06-05 04:32:58,514 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:32:58,541 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:32:58,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:32:58,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:32:58,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:32:58,639 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:32:58,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1033613325] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:58,639 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:32:58,639 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:32:58,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440480682] [2021-06-05 04:32:58,639 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:32:58,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:32:58,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:32:58,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:32:58,639 INFO L87 Difference]: Start difference. First operand 98 states and 212 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:58,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:32:58,798 INFO L93 Difference]: Finished difference Result 102 states and 218 transitions. [2021-06-05 04:32:58,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:32:58,798 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 04:32:58,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:32:58,799 INFO L225 Difference]: With dead ends: 102 [2021-06-05 04:32:58,799 INFO L226 Difference]: Without dead ends: 102 [2021-06-05 04:32:58,799 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 217.8ms TimeCoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:32:58,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-06-05 04:32:58,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 92. [2021-06-05 04:32:58,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 2.1868131868131866) internal successors, (199), 91 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:58,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 199 transitions. [2021-06-05 04:32:58,800 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 199 transitions. Word has length 17 [2021-06-05 04:32:58,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:32:58,800 INFO L482 AbstractCegarLoop]: Abstraction has 92 states and 199 transitions. [2021-06-05 04:32:58,800 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 04:32:58,800 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 199 transitions. [2021-06-05 04:32:58,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:32:58,800 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:32:58,800 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:32:59,022 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable840 [2021-06-05 04:32:59,022 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:32:59,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:32:59,023 INFO L82 PathProgramCache]: Analyzing trace with hash -2138227046, now seen corresponding path program 143 times [2021-06-05 04:32:59,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:32:59,023 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786197617] [2021-06-05 04:32:59,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:32:59,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:32:59,087 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 04:32:59,088 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:32:59,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786197617] [2021-06-05 04:32:59,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786197617] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:59,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849989756] [2021-06-05 04:32:59,088 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 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 04:32:59,132 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:32:59,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:32:59,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:32:59,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:32:59,256 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 04:32:59,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [849989756] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:59,256 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:32:59,256 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:32:59,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908535532] [2021-06-05 04:32:59,256 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:32:59,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:32:59,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:32:59,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:32:59,257 INFO L87 Difference]: Start difference. First operand 92 states and 199 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:59,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:32:59,372 INFO L93 Difference]: Finished difference Result 129 states and 261 transitions. [2021-06-05 04:32:59,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:32:59,373 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 04:32:59,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:32:59,373 INFO L225 Difference]: With dead ends: 129 [2021-06-05 04:32:59,373 INFO L226 Difference]: Without dead ends: 126 [2021-06-05 04:32:59,373 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 133.3ms TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:32:59,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-06-05 04:32:59,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 97. [2021-06-05 04:32:59,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 2.1875) internal successors, (210), 96 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:59,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 210 transitions. [2021-06-05 04:32:59,374 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 210 transitions. Word has length 17 [2021-06-05 04:32:59,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:32:59,374 INFO L482 AbstractCegarLoop]: Abstraction has 97 states and 210 transitions. [2021-06-05 04:32:59,374 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 04:32:59,374 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 210 transitions. [2021-06-05 04:32:59,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:32:59,375 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:32:59,375 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:32:59,576 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable850 [2021-06-05 04:32:59,577 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:32:59,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:32:59,577 INFO L82 PathProgramCache]: Analyzing trace with hash -1712089544, now seen corresponding path program 144 times [2021-06-05 04:32:59,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:32:59,577 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371192336] [2021-06-05 04:32:59,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:32:59,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:32:59,650 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 04:32:59,650 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:32:59,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371192336] [2021-06-05 04:32:59,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371192336] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:59,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383837379] [2021-06-05 04:32:59,650 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:32:59,673 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:32:59,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:32:59,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 04:32:59,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:32:59,759 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:59,759 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:59,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:32:59,761 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:32:59,764 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:59,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 04:32:59,765 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:32:59,815 INFO L628 ElimStorePlain]: treesize reduction 86, result has 34.4 percent of original size [2021-06-05 04:32:59,815 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 04:32:59,817 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 04:32:59,818 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:32:59,832 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:32:59,832 INFO L518 ElimStorePlain]: Eliminatee v_prenex_115 vanished before elimination [2021-06-05 04:32:59,833 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 04:32:59,833 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:141, output treesize:22 [2021-06-05 04:32:59,869 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:32:59,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1383837379] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:59,870 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:32:59,870 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 04:32:59,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907781720] [2021-06-05 04:32:59,870 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:32:59,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:32:59,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:32:59,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:32:59,870 INFO L87 Difference]: Start difference. First operand 97 states and 210 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:59,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:32:59,977 INFO L93 Difference]: Finished difference Result 125 states and 258 transitions. [2021-06-05 04:32:59,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:32:59,977 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:32:59,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:32:59,978 INFO L225 Difference]: With dead ends: 125 [2021-06-05 04:32:59,978 INFO L226 Difference]: Without dead ends: 125 [2021-06-05 04:32:59,978 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 141.8ms TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:32:59,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-06-05 04:32:59,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 97. [2021-06-05 04:32:59,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 2.1875) internal successors, (210), 96 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:59,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 210 transitions. [2021-06-05 04:32:59,979 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 210 transitions. Word has length 17 [2021-06-05 04:32:59,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:32:59,979 INFO L482 AbstractCegarLoop]: Abstraction has 97 states and 210 transitions. [2021-06-05 04:32:59,979 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 04:32:59,979 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 210 transitions. [2021-06-05 04:32:59,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:32:59,979 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:32:59,979 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:33:00,179 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable863 [2021-06-05 04:33:00,180 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:33:00,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:33:00,180 INFO L82 PathProgramCache]: Analyzing trace with hash -1002041774, now seen corresponding path program 145 times [2021-06-05 04:33:00,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:33:00,180 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435653671] [2021-06-05 04:33:00,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:33:00,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:33:00,251 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 04:33:00,251 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:33:00,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435653671] [2021-06-05 04:33:00,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435653671] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:00,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641439001] [2021-06-05 04:33:00,251 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 04:33:00,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:33:00,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:33:00,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:33:00,393 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 04:33:00,393 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1641439001] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:00,393 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:33:00,393 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:33:00,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778753543] [2021-06-05 04:33:00,394 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:33:00,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:33:00,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:33:00,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:33:00,394 INFO L87 Difference]: Start difference. First operand 97 states and 210 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:00,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:33:00,520 INFO L93 Difference]: Finished difference Result 134 states and 273 transitions. [2021-06-05 04:33:00,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:33:00,521 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 04:33:00,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:33:00,521 INFO L225 Difference]: With dead ends: 134 [2021-06-05 04:33:00,521 INFO L226 Difference]: Without dead ends: 134 [2021-06-05 04:33:00,521 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 143.4ms TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:33:00,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-06-05 04:33:00,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 96. [2021-06-05 04:33:00,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 2.1894736842105265) internal successors, (208), 95 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:00,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 208 transitions. [2021-06-05 04:33:00,522 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 208 transitions. Word has length 17 [2021-06-05 04:33:00,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:33:00,522 INFO L482 AbstractCegarLoop]: Abstraction has 96 states and 208 transitions. [2021-06-05 04:33:00,522 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 04:33:00,522 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 208 transitions. [2021-06-05 04:33:00,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:33:00,523 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:33:00,523 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:33:00,723 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable867,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:33:00,723 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:33:00,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:33:00,723 INFO L82 PathProgramCache]: Analyzing trace with hash 1059873528, now seen corresponding path program 146 times [2021-06-05 04:33:00,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:33:00,723 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361801402] [2021-06-05 04:33:00,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:33:00,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:33:00,788 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 04:33:00,788 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:33:00,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361801402] [2021-06-05 04:33:00,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361801402] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:00,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771570530] [2021-06-05 04:33:00,788 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:33:00,811 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:33:00,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:33:00,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 04:33:00,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:33:00,918 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 04:33:00,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [771570530] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:00,918 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:33:00,918 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:33:00,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409766392] [2021-06-05 04:33:00,919 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:33:00,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:33:00,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:33:00,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:33:00,919 INFO L87 Difference]: Start difference. First operand 96 states and 208 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:01,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:33:01,041 INFO L93 Difference]: Finished difference Result 100 states and 212 transitions. [2021-06-05 04:33:01,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:33:01,041 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 04:33:01,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:33:01,041 INFO L225 Difference]: With dead ends: 100 [2021-06-05 04:33:01,041 INFO L226 Difference]: Without dead ends: 96 [2021-06-05 04:33:01,041 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 149.1ms TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:33:01,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-06-05 04:33:01,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2021-06-05 04:33:01,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 2.1789473684210527) internal successors, (207), 95 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:01,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 207 transitions. [2021-06-05 04:33:01,042 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 207 transitions. Word has length 17 [2021-06-05 04:33:01,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:33:01,043 INFO L482 AbstractCegarLoop]: Abstraction has 96 states and 207 transitions. [2021-06-05 04:33:01,043 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 04:33:01,043 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 207 transitions. [2021-06-05 04:33:01,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:33:01,043 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:33:01,043 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:33:01,243 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable879,147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:33:01,243 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:33:01,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:33:01,243 INFO L82 PathProgramCache]: Analyzing trace with hash 1146754762, now seen corresponding path program 147 times [2021-06-05 04:33:01,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:33:01,244 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46790201] [2021-06-05 04:33:01,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:33:01,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:33:01,303 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 04:33:01,303 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:33:01,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46790201] [2021-06-05 04:33:01,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46790201] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:01,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156014754] [2021-06-05 04:33:01,303 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:33:01,329 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:33:01,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:33:01,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:33:01,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:33:01,420 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 04:33:01,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1156014754] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:01,421 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:33:01,421 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:33:01,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653223458] [2021-06-05 04:33:01,421 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:33:01,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:33:01,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:33:01,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:33:01,421 INFO L87 Difference]: Start difference. First operand 96 states and 207 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:01,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:33:01,514 INFO L93 Difference]: Finished difference Result 108 states and 228 transitions. [2021-06-05 04:33:01,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:33:01,515 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 04:33:01,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:33:01,515 INFO L225 Difference]: With dead ends: 108 [2021-06-05 04:33:01,515 INFO L226 Difference]: Without dead ends: 108 [2021-06-05 04:33:01,515 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 109.2ms TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:33:01,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-06-05 04:33:01,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 88. [2021-06-05 04:33:01,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 2.1724137931034484) internal successors, (189), 87 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:01,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 189 transitions. [2021-06-05 04:33:01,516 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 189 transitions. Word has length 17 [2021-06-05 04:33:01,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:33:01,516 INFO L482 AbstractCegarLoop]: Abstraction has 88 states and 189 transitions. [2021-06-05 04:33:01,516 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 04:33:01,516 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 189 transitions. [2021-06-05 04:33:01,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:33:01,516 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:33:01,516 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:33:01,722 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 148 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable883 [2021-06-05 04:33:01,722 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:33:01,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:33:01,722 INFO L82 PathProgramCache]: Analyzing trace with hash -935331810, now seen corresponding path program 148 times [2021-06-05 04:33:01,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:33:01,722 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815966353] [2021-06-05 04:33:01,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:33:01,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:33:01,804 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:33:01,804 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:33:01,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815966353] [2021-06-05 04:33:01,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815966353] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:01,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488303402] [2021-06-05 04:33:01,804 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:33:01,829 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:33:01,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:33:01,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:33:01,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:33:01,914 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:01,914 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:01,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:33:01,915 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:01,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:01,917 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 04:33:01,918 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:01,932 INFO L628 ElimStorePlain]: treesize reduction 29, result has 32.6 percent of original size [2021-06-05 04:33:01,932 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 04:33:01,932 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 04:33:01,933 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:57, output treesize:6 [2021-06-05 04:33:01,945 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 04:33:01,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [488303402] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:01,945 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:33:01,945 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 04:33:01,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698950993] [2021-06-05 04:33:01,946 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:33:01,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:33:01,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:33:01,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:33:01,946 INFO L87 Difference]: Start difference. First operand 88 states and 189 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:02,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:33:02,076 INFO L93 Difference]: Finished difference Result 107 states and 227 transitions. [2021-06-05 04:33:02,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:33:02,076 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:33:02,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:33:02,076 INFO L225 Difference]: With dead ends: 107 [2021-06-05 04:33:02,076 INFO L226 Difference]: Without dead ends: 107 [2021-06-05 04:33:02,076 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 164.8ms TimeCoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:33:02,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-06-05 04:33:02,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 88. [2021-06-05 04:33:02,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 2.1724137931034484) internal successors, (189), 87 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:02,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 189 transitions. [2021-06-05 04:33:02,081 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 189 transitions. Word has length 17 [2021-06-05 04:33:02,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:33:02,081 INFO L482 AbstractCegarLoop]: Abstraction has 88 states and 189 transitions. [2021-06-05 04:33:02,081 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 04:33:02,081 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 189 transitions. [2021-06-05 04:33:02,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:33:02,081 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:33:02,081 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:33:02,303 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable887 [2021-06-05 04:33:02,304 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:33:02,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:33:02,304 INFO L82 PathProgramCache]: Analyzing trace with hash -1721385830, now seen corresponding path program 149 times [2021-06-05 04:33:02,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:33:02,304 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478432152] [2021-06-05 04:33:02,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:33:02,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:33:02,375 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 04:33:02,375 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:33:02,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478432152] [2021-06-05 04:33:02,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478432152] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:02,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83749564] [2021-06-05 04:33:02,376 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:33:02,411 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:33:02,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:33:02,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:33:02,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:33:02,534 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 04:33:02,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [83749564] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:02,534 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:33:02,534 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:33:02,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954316394] [2021-06-05 04:33:02,535 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:33:02,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:33:02,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:33:02,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:33:02,535 INFO L87 Difference]: Start difference. First operand 88 states and 189 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:02,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:33:02,764 INFO L93 Difference]: Finished difference Result 113 states and 230 transitions. [2021-06-05 04:33:02,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:33:02,765 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:33:02,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:33:02,765 INFO L225 Difference]: With dead ends: 113 [2021-06-05 04:33:02,765 INFO L226 Difference]: Without dead ends: 110 [2021-06-05 04:33:02,765 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 239.8ms TimeCoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:33:02,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-06-05 04:33:02,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 93. [2021-06-05 04:33:02,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 2.1739130434782608) internal successors, (200), 92 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:02,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 200 transitions. [2021-06-05 04:33:02,767 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 200 transitions. Word has length 17 [2021-06-05 04:33:02,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:33:02,767 INFO L482 AbstractCegarLoop]: Abstraction has 93 states and 200 transitions. [2021-06-05 04:33:02,767 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:02,767 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 200 transitions. [2021-06-05 04:33:02,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:33:02,767 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:33:02,767 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:33:02,968 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable891 [2021-06-05 04:33:02,968 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:33:02,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:33:02,968 INFO L82 PathProgramCache]: Analyzing trace with hash -1945317298, now seen corresponding path program 150 times [2021-06-05 04:33:02,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:33:02,968 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619981821] [2021-06-05 04:33:02,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:33:02,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:33:03,039 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:33:03,039 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:33:03,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619981821] [2021-06-05 04:33:03,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619981821] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:03,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575491852] [2021-06-05 04:33:03,040 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:33:03,063 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:33:03,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:33:03,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:33:03,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:33:03,148 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:03,149 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:03,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:33:03,150 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:03,152 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:03,152 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:03,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:33:03,153 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:03,155 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:03,156 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:03,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:33:03,156 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:03,158 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:03,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:33:03,159 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:03,191 INFO L628 ElimStorePlain]: treesize reduction 53, result has 36.9 percent of original size [2021-06-05 04:33:03,191 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 04:33:03,192 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 04:33:03,192 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:121, output treesize:15 [2021-06-05 04:33:03,225 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 04:33:03,225 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1575491852] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:03,225 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:33:03,225 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 04:33:03,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326839778] [2021-06-05 04:33:03,225 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:33:03,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:33:03,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:33:03,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:33:03,226 INFO L87 Difference]: Start difference. First operand 93 states and 200 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:03,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:33:03,397 INFO L93 Difference]: Finished difference Result 126 states and 266 transitions. [2021-06-05 04:33:03,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:33:03,398 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:33:03,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:33:03,398 INFO L225 Difference]: With dead ends: 126 [2021-06-05 04:33:03,398 INFO L226 Difference]: Without dead ends: 126 [2021-06-05 04:33:03,398 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 172.4ms TimeCoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:33:03,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-06-05 04:33:03,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 93. [2021-06-05 04:33:03,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 2.1739130434782608) internal successors, (200), 92 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:03,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 200 transitions. [2021-06-05 04:33:03,399 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 200 transitions. Word has length 17 [2021-06-05 04:33:03,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:33:03,399 INFO L482 AbstractCegarLoop]: Abstraction has 93 states and 200 transitions. [2021-06-05 04:33:03,399 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 04:33:03,399 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 200 transitions. [2021-06-05 04:33:03,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:33:03,400 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:33:03,400 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:33:03,600 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable903,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:33:03,600 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:33:03,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:33:03,600 INFO L82 PathProgramCache]: Analyzing trace with hash -585200558, now seen corresponding path program 151 times [2021-06-05 04:33:03,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:33:03,601 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843783859] [2021-06-05 04:33:03,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:33:03,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:33:03,667 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:33:03,667 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:33:03,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843783859] [2021-06-05 04:33:03,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843783859] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:03,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901561551] [2021-06-05 04:33:03,668 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 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:33:03,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:33:03,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:33:03,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:33:03,803 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 04:33:03,803 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [901561551] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:03,803 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:33:03,803 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:33:03,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990746705] [2021-06-05 04:33:03,803 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:33:03,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:33:03,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:33:03,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:33:03,803 INFO L87 Difference]: Start difference. First operand 93 states and 200 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:03,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:33:03,950 INFO L93 Difference]: Finished difference Result 98 states and 209 transitions. [2021-06-05 04:33:03,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:33:03,950 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 04:33:03,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:33:03,951 INFO L225 Difference]: With dead ends: 98 [2021-06-05 04:33:03,951 INFO L226 Difference]: Without dead ends: 98 [2021-06-05 04:33:03,951 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 177.1ms TimeCoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:33:03,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-06-05 04:33:03,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 87. [2021-06-05 04:33:03,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 2.1744186046511627) internal successors, (187), 86 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:03,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 187 transitions. [2021-06-05 04:33:03,952 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 187 transitions. Word has length 17 [2021-06-05 04:33:03,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:33:03,952 INFO L482 AbstractCegarLoop]: Abstraction has 87 states and 187 transitions. [2021-06-05 04:33:03,952 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 04:33:03,952 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 187 transitions. [2021-06-05 04:33:03,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:33:03,952 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:33:03,952 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:33:04,164 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable913 [2021-06-05 04:33:04,165 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:33:04,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:33:04,165 INFO L82 PathProgramCache]: Analyzing trace with hash 466797346, now seen corresponding path program 152 times [2021-06-05 04:33:04,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:33:04,165 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937063622] [2021-06-05 04:33:04,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:33:04,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:33:04,228 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 04:33:04,228 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:33:04,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937063622] [2021-06-05 04:33:04,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937063622] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:04,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907359213] [2021-06-05 04:33:04,229 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:33:04,251 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:33:04,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:33:04,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:33:04,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:33:04,366 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:33:04,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [907359213] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:04,366 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:33:04,366 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:33:04,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104401702] [2021-06-05 04:33:04,366 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:33:04,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:33:04,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:33:04,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:33:04,367 INFO L87 Difference]: Start difference. First operand 87 states and 187 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:04,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:33:04,556 INFO L93 Difference]: Finished difference Result 125 states and 252 transitions. [2021-06-05 04:33:04,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:33:04,556 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:33:04,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:33:04,557 INFO L225 Difference]: With dead ends: 125 [2021-06-05 04:33:04,557 INFO L226 Difference]: Without dead ends: 122 [2021-06-05 04:33:04,557 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 218.5ms TimeCoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:33:04,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-06-05 04:33:04,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 94. [2021-06-05 04:33:04,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 2.193548387096774) internal successors, (204), 93 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:04,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 204 transitions. [2021-06-05 04:33:04,558 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 204 transitions. Word has length 17 [2021-06-05 04:33:04,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:33:04,558 INFO L482 AbstractCegarLoop]: Abstraction has 94 states and 204 transitions. [2021-06-05 04:33:04,558 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:04,558 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 204 transitions. [2021-06-05 04:33:04,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:33:04,558 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:33:04,558 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:33:04,772 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable923,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:33:04,772 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:33:04,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:33:04,772 INFO L82 PathProgramCache]: Analyzing trace with hash 242865878, now seen corresponding path program 153 times [2021-06-05 04:33:04,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:33:04,772 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336126324] [2021-06-05 04:33:04,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:33:04,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:33:04,841 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:33:04,841 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:33:04,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336126324] [2021-06-05 04:33:04,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336126324] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:04,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159339113] [2021-06-05 04:33:04,841 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 04:33:04,864 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:33:04,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:33:04,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:33:04,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:33:04,953 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:04,954 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:04,954 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 15 treesize of output 11 [2021-06-05 04:33:04,954 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:04,957 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:04,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:33:04,958 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:04,996 INFO L628 ElimStorePlain]: treesize reduction 68, result has 36.4 percent of original size [2021-06-05 04:33:04,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 04:33:04,999 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:05,015 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:33:05,015 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 04:33:05,015 INFO L518 ElimStorePlain]: Eliminatee v_prenex_117 vanished before elimination [2021-06-05 04:33:05,016 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 04:33:05,016 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-06-05 04:33:05,051 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 04:33:05,052 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1159339113] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:05,052 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:33:05,052 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 04:33:05,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052515007] [2021-06-05 04:33:05,052 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:33:05,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:33:05,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:33:05,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:33:05,052 INFO L87 Difference]: Start difference. First operand 94 states and 204 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:05,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:33:05,269 INFO L93 Difference]: Finished difference Result 118 states and 243 transitions. [2021-06-05 04:33:05,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:33:05,270 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:33:05,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:33:05,270 INFO L225 Difference]: With dead ends: 118 [2021-06-05 04:33:05,270 INFO L226 Difference]: Without dead ends: 118 [2021-06-05 04:33:05,270 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 259.5ms TimeCoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:33:05,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-06-05 04:33:05,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 94. [2021-06-05 04:33:05,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 2.193548387096774) internal successors, (204), 93 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:05,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 204 transitions. [2021-06-05 04:33:05,271 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 204 transitions. Word has length 17 [2021-06-05 04:33:05,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:33:05,271 INFO L482 AbstractCegarLoop]: Abstraction has 94 states and 204 transitions. [2021-06-05 04:33:05,271 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 04:33:05,271 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 204 transitions. [2021-06-05 04:33:05,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:33:05,272 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:33:05,272 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:33:05,472 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable934,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:33:05,472 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:33:05,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:33:05,472 INFO L82 PathProgramCache]: Analyzing trace with hash 1602982618, now seen corresponding path program 154 times [2021-06-05 04:33:05,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:33:05,473 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301076885] [2021-06-05 04:33:05,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:33:05,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:33:05,553 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 04:33:05,553 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:33:05,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301076885] [2021-06-05 04:33:05,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301076885] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:05,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217796302] [2021-06-05 04:33:05,553 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:33:05,640 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:33:05,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:33:05,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:33:05,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:33:05,784 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:33:05,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217796302] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:05,784 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:33:05,784 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:33:05,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724224811] [2021-06-05 04:33:05,784 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:33:05,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:33:05,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:33:05,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:33:05,785 INFO L87 Difference]: Start difference. First operand 94 states and 204 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:05,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:33:05,968 INFO L93 Difference]: Finished difference Result 128 states and 261 transitions. [2021-06-05 04:33:05,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:33:05,969 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 04:33:05,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:33:05,969 INFO L225 Difference]: With dead ends: 128 [2021-06-05 04:33:05,969 INFO L226 Difference]: Without dead ends: 128 [2021-06-05 04:33:05,969 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 245.1ms TimeCoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:33:05,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-06-05 04:33:05,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 93. [2021-06-05 04:33:05,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 2.1956521739130435) internal successors, (202), 92 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:05,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 202 transitions. [2021-06-05 04:33:05,970 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 202 transitions. Word has length 17 [2021-06-05 04:33:05,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:33:05,970 INFO L482 AbstractCegarLoop]: Abstraction has 93 states and 202 transitions. [2021-06-05 04:33:05,970 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 04:33:05,970 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 202 transitions. [2021-06-05 04:33:05,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:33:05,971 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:33:05,971 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:33:06,171 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable941 [2021-06-05 04:33:06,171 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:33:06,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:33:06,171 INFO L82 PathProgramCache]: Analyzing trace with hash -630069376, now seen corresponding path program 155 times [2021-06-05 04:33:06,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:33:06,171 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352576183] [2021-06-05 04:33:06,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:33:06,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:33:06,236 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 04:33:06,236 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:33:06,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352576183] [2021-06-05 04:33:06,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352576183] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:06,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666061027] [2021-06-05 04:33:06,236 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:33:06,259 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:33:06,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:33:06,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:33:06,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:33:06,362 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:33:06,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [666061027] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:06,362 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:33:06,362 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:33:06,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640585662] [2021-06-05 04:33:06,363 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:33:06,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:33:06,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:33:06,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:33:06,363 INFO L87 Difference]: Start difference. First operand 93 states and 202 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:06,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:33:06,563 INFO L93 Difference]: Finished difference Result 97 states and 206 transitions. [2021-06-05 04:33:06,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:33:06,563 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 04:33:06,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:33:06,563 INFO L225 Difference]: With dead ends: 97 [2021-06-05 04:33:06,563 INFO L226 Difference]: Without dead ends: 93 [2021-06-05 04:33:06,563 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 244.7ms TimeCoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:33:06,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-06-05 04:33:06,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2021-06-05 04:33:06,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 2.1847826086956523) internal successors, (201), 92 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:06,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 201 transitions. [2021-06-05 04:33:06,564 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 201 transitions. Word has length 17 [2021-06-05 04:33:06,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:33:06,565 INFO L482 AbstractCegarLoop]: Abstraction has 93 states and 201 transitions. [2021-06-05 04:33:06,565 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 04:33:06,565 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 201 transitions. [2021-06-05 04:33:06,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:33:06,565 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:33:06,565 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:33:06,777 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable953,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:33:06,777 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:33:06,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:33:06,777 INFO L82 PathProgramCache]: Analyzing trace with hash -543188142, now seen corresponding path program 156 times [2021-06-05 04:33:06,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:33:06,777 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231900251] [2021-06-05 04:33:06,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:33:06,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:33:06,857 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 04:33:06,857 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:33:06,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231900251] [2021-06-05 04:33:06,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231900251] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:06,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027136631] [2021-06-05 04:33:06,857 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 04:33:06,884 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:33:06,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:33:06,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:33:06,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:33:07,024 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 04:33:07,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2027136631] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:07,024 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:33:07,024 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:33:07,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675153272] [2021-06-05 04:33:07,024 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:33:07,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:33:07,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:33:07,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:33:07,025 INFO L87 Difference]: Start difference. First operand 93 states and 201 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:07,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:33:07,124 INFO L93 Difference]: Finished difference Result 105 states and 222 transitions. [2021-06-05 04:33:07,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:33:07,124 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 04:33:07,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:33:07,125 INFO L225 Difference]: With dead ends: 105 [2021-06-05 04:33:07,125 INFO L226 Difference]: Without dead ends: 105 [2021-06-05 04:33:07,125 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 162.3ms TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:33:07,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-06-05 04:33:07,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 86. [2021-06-05 04:33:07,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 2.176470588235294) internal successors, (185), 85 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:07,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 185 transitions. [2021-06-05 04:33:07,126 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 185 transitions. Word has length 17 [2021-06-05 04:33:07,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:33:07,126 INFO L482 AbstractCegarLoop]: Abstraction has 86 states and 185 transitions. [2021-06-05 04:33:07,126 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 04:33:07,126 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 185 transitions. [2021-06-05 04:33:07,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:33:07,126 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:33:07,126 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:33:07,328 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable959,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:33:07,329 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:33:07,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:33:07,329 INFO L82 PathProgramCache]: Analyzing trace with hash -419000934, now seen corresponding path program 157 times [2021-06-05 04:33:07,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:33:07,329 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374264820] [2021-06-05 04:33:07,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:33:07,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:33:07,399 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 04:33:07,400 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:33:07,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374264820] [2021-06-05 04:33:07,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374264820] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:07,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388868225] [2021-06-05 04:33:07,400 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:33:07,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:33:07,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:33:07,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:33:07,615 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 04:33:07,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [388868225] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:07,615 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:33:07,615 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:33:07,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501834092] [2021-06-05 04:33:07,615 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:33:07,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:33:07,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:33:07,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:33:07,616 INFO L87 Difference]: Start difference. First operand 86 states and 185 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:07,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:33:07,939 INFO L93 Difference]: Finished difference Result 123 states and 249 transitions. [2021-06-05 04:33:07,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:33:07,939 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 04:33:07,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:33:07,940 INFO L225 Difference]: With dead ends: 123 [2021-06-05 04:33:07,940 INFO L226 Difference]: Without dead ends: 120 [2021-06-05 04:33:07,940 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 351.1ms TimeCoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:33:07,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-06-05 04:33:07,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 94. [2021-06-05 04:33:07,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 2.21505376344086) internal successors, (206), 93 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:07,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 206 transitions. [2021-06-05 04:33:07,941 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 206 transitions. Word has length 17 [2021-06-05 04:33:07,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:33:07,942 INFO L482 AbstractCegarLoop]: Abstraction has 94 states and 206 transitions. [2021-06-05 04:33:07,942 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 04:33:07,942 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 206 transitions. [2021-06-05 04:33:07,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:33:07,942 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:33:07,942 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:33:08,142 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable963 [2021-06-05 04:33:08,142 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:33:08,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:33:08,143 INFO L82 PathProgramCache]: Analyzing trace with hash -642932402, now seen corresponding path program 158 times [2021-06-05 04:33:08,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:33:08,143 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455143732] [2021-06-05 04:33:08,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:33:08,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:33:08,224 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 04:33:08,224 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:33:08,224 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455143732] [2021-06-05 04:33:08,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455143732] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:08,224 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751573826] [2021-06-05 04:33:08,224 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:33:08,247 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:33:08,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:33:08,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:33:08,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:33:08,360 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:08,360 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:08,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:33:08,361 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:08,364 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:08,364 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 17 treesize of output 13 [2021-06-05 04:33:08,365 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:08,402 INFO L628 ElimStorePlain]: treesize reduction 60, result has 38.8 percent of original size [2021-06-05 04:33:08,402 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 04:33:08,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index 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 04:33:08,405 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:08,417 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:33:08,417 INFO L518 ElimStorePlain]: Eliminatee v_prenex_123 vanished before elimination [2021-06-05 04:33:08,418 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 04:33:08,418 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-06-05 04:33:08,444 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 04:33:08,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [751573826] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:08,445 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:33:08,445 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:33:08,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008283542] [2021-06-05 04:33:08,445 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:33:08,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:33:08,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:33:08,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:33:08,445 INFO L87 Difference]: Start difference. First operand 94 states and 206 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:08,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:33:08,690 INFO L93 Difference]: Finished difference Result 121 states and 250 transitions. [2021-06-05 04:33:08,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:33:08,690 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 04:33:08,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:33:08,690 INFO L225 Difference]: With dead ends: 121 [2021-06-05 04:33:08,690 INFO L226 Difference]: Without dead ends: 121 [2021-06-05 04:33:08,690 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 272.8ms TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:33:08,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-06-05 04:33:08,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 94. [2021-06-05 04:33:08,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 2.21505376344086) internal successors, (206), 93 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:08,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 206 transitions. [2021-06-05 04:33:08,691 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 206 transitions. Word has length 17 [2021-06-05 04:33:08,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:33:08,692 INFO L482 AbstractCegarLoop]: Abstraction has 94 states and 206 transitions. [2021-06-05 04:33:08,692 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 04:33:08,692 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 206 transitions. [2021-06-05 04:33:08,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:33:08,692 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:33:08,692 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:33:08,892 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable976 [2021-06-05 04:33:08,892 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:33:08,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:33:08,893 INFO L82 PathProgramCache]: Analyzing trace with hash -2053723234, now seen corresponding path program 159 times [2021-06-05 04:33:08,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:33:08,893 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098139660] [2021-06-05 04:33:08,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:33:08,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:33:08,962 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 04:33:08,963 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:33:08,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098139660] [2021-06-05 04:33:08,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098139660] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:08,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045631155] [2021-06-05 04:33:08,963 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:33:08,986 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:33:08,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:33:08,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:33:08,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:33:09,106 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:09,107 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:09,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:33:09,108 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:09,110 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:09,110 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 04:33:09,111 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:09,150 INFO L628 ElimStorePlain]: treesize reduction 68, result has 36.4 percent of original size [2021-06-05 04:33:09,150 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 04:33:09,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:33:09,153 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:09,165 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:33:09,165 INFO L518 ElimStorePlain]: Eliminatee v_prenex_126 vanished before elimination [2021-06-05 04:33:09,166 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 04:33:09,166 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-06-05 04:33:09,193 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 04:33:09,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1045631155] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:09,193 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:33:09,193 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:33:09,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321100620] [2021-06-05 04:33:09,193 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:33:09,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:33:09,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:33:09,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:33:09,193 INFO L87 Difference]: Start difference. First operand 94 states and 206 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:09,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:33:09,504 INFO L93 Difference]: Finished difference Result 123 states and 251 transitions. [2021-06-05 04:33:09,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:33:09,504 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 04:33:09,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:33:09,504 INFO L225 Difference]: With dead ends: 123 [2021-06-05 04:33:09,504 INFO L226 Difference]: Without dead ends: 121 [2021-06-05 04:33:09,504 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 322.3ms TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:33:09,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-06-05 04:33:09,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 94. [2021-06-05 04:33:09,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 2.204301075268817) internal successors, (205), 93 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:09,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 205 transitions. [2021-06-05 04:33:09,505 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 205 transitions. Word has length 17 [2021-06-05 04:33:09,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:33:09,505 INFO L482 AbstractCegarLoop]: Abstraction has 94 states and 205 transitions. [2021-06-05 04:33:09,505 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:09,506 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 205 transitions. [2021-06-05 04:33:09,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:33:09,506 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:33:09,506 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:33:09,706 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 160 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable983 [2021-06-05 04:33:09,706 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:33:09,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:33:09,707 INFO L82 PathProgramCache]: Analyzing trace with hash 717184338, now seen corresponding path program 160 times [2021-06-05 04:33:09,707 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:33:09,707 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130929672] [2021-06-05 04:33:09,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:33:09,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:33:09,780 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 04:33:09,780 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:33:09,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130929672] [2021-06-05 04:33:09,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130929672] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:09,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658654543] [2021-06-05 04:33:09,781 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:33:09,807 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:33:09,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:33:09,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:33:09,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:33:09,941 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 04:33:09,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1658654543] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:09,941 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:33:09,941 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:33:09,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817243274] [2021-06-05 04:33:09,941 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:33:09,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:33:09,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:33:09,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:33:09,942 INFO L87 Difference]: Start difference. First operand 94 states and 205 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:10,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:33:10,272 INFO L93 Difference]: Finished difference Result 126 states and 257 transitions. [2021-06-05 04:33:10,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:33:10,272 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 04:33:10,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:33:10,272 INFO L225 Difference]: With dead ends: 126 [2021-06-05 04:33:10,272 INFO L226 Difference]: Without dead ends: 126 [2021-06-05 04:33:10,272 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 332.5ms TimeCoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:33:10,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-06-05 04:33:10,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 93. [2021-06-05 04:33:10,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 2.2065217391304346) internal successors, (203), 92 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:10,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 203 transitions. [2021-06-05 04:33:10,273 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 203 transitions. Word has length 17 [2021-06-05 04:33:10,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:33:10,274 INFO L482 AbstractCegarLoop]: Abstraction has 93 states and 203 transitions. [2021-06-05 04:33:10,274 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 04:33:10,274 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 203 transitions. [2021-06-05 04:33:10,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:33:10,274 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:33:10,274 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:33:10,474 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable991 [2021-06-05 04:33:10,474 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:33:10,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:33:10,475 INFO L82 PathProgramCache]: Analyzing trace with hash -1515867656, now seen corresponding path program 161 times [2021-06-05 04:33:10,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:33:10,475 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766648342] [2021-06-05 04:33:10,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:33:10,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:33:10,546 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 04:33:10,546 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:33:10,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766648342] [2021-06-05 04:33:10,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766648342] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:10,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146271675] [2021-06-05 04:33:10,546 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:33:10,569 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:33:10,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:33:10,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:33:10,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:33:10,698 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 04:33:10,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [146271675] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:10,698 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:33:10,698 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:33:10,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542420002] [2021-06-05 04:33:10,698 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:33:10,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:33:10,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:33:10,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:33:10,699 INFO L87 Difference]: Start difference. First operand 93 states and 203 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:10,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:33:10,977 INFO L93 Difference]: Finished difference Result 101 states and 213 transitions. [2021-06-05 04:33:10,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:33:10,977 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 04:33:10,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:33:10,977 INFO L225 Difference]: With dead ends: 101 [2021-06-05 04:33:10,978 INFO L226 Difference]: Without dead ends: 97 [2021-06-05 04:33:10,978 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 319.9ms TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:33:10,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-06-05 04:33:10,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 93. [2021-06-05 04:33:10,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 2.1956521739130435) internal successors, (202), 92 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:10,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 202 transitions. [2021-06-05 04:33:10,979 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 202 transitions. Word has length 17 [2021-06-05 04:33:10,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:33:10,979 INFO L482 AbstractCegarLoop]: Abstraction has 93 states and 202 transitions. [2021-06-05 04:33:10,979 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 04:33:10,979 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 202 transitions. [2021-06-05 04:33:10,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:33:10,979 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:33:10,979 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:33:11,179 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 162 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1001 [2021-06-05 04:33:11,180 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:33:11,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:33:11,180 INFO L82 PathProgramCache]: Analyzing trace with hash -1428986422, now seen corresponding path program 162 times [2021-06-05 04:33:11,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:33:11,180 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064269605] [2021-06-05 04:33:11,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:33:11,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:33:11,235 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 04:33:11,235 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:33:11,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064269605] [2021-06-05 04:33:11,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064269605] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:11,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111528024] [2021-06-05 04:33:11,236 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 04:33:11,259 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:33:11,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:33:11,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 04:33:11,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:33:11,364 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:11,365 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:11,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:33:11,366 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:11,368 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:11,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:33:11,369 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:11,387 INFO L628 ElimStorePlain]: treesize reduction 28, result has 42.9 percent of original size [2021-06-05 04:33:11,389 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:11,389 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 9 treesize of output 5 [2021-06-05 04:33:11,390 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:33:11,395 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:33:11,396 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 04:33:11,396 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:63, output treesize:9 [2021-06-05 04:33:11,413 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 04:33:11,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2111528024] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:11,413 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:33:11,413 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 04:33:11,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746919788] [2021-06-05 04:33:11,413 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:33:11,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:33:11,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:33:11,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:33:11,414 INFO L87 Difference]: Start difference. First operand 93 states and 202 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:11,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:33:11,671 INFO L93 Difference]: Finished difference Result 113 states and 238 transitions. [2021-06-05 04:33:11,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:33:11,671 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:33:11,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:33:11,672 INFO L225 Difference]: With dead ends: 113 [2021-06-05 04:33:11,672 INFO L226 Difference]: Without dead ends: 113 [2021-06-05 04:33:11,672 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 278.6ms TimeCoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:33:11,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-06-05 04:33:11,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 92. [2021-06-05 04:33:11,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 2.197802197802198) internal successors, (200), 91 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:11,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 200 transitions. [2021-06-05 04:33:11,673 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 200 transitions. Word has length 17 [2021-06-05 04:33:11,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:33:11,673 INFO L482 AbstractCegarLoop]: Abstraction has 92 states and 200 transitions. [2021-06-05 04:33:11,673 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 04:33:11,673 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 200 transitions. [2021-06-05 04:33:11,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:33:11,673 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:33:11,673 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:33:11,876 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1006,163 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:33:11,877 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:33:11,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:33:11,877 INFO L82 PathProgramCache]: Analyzing trace with hash -2022213922, now seen corresponding path program 163 times [2021-06-05 04:33:11,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:33:11,877 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799934733] [2021-06-05 04:33:11,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:33:11,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:33:11,945 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 04:33:11,945 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:33:11,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799934733] [2021-06-05 04:33:11,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799934733] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:11,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1139220423] [2021-06-05 04:33:11,945 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:33:11,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:33:11,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:33:11,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:33:12,076 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 04:33:12,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1139220423] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:12,077 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:33:12,077 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:33:12,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773511280] [2021-06-05 04:33:12,077 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:33:12,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:33:12,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:33:12,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:33:12,077 INFO L87 Difference]: Start difference. First operand 92 states and 200 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:12,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:33:12,294 INFO L93 Difference]: Finished difference Result 98 states and 207 transitions. [2021-06-05 04:33:12,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:33:12,294 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 04:33:12,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:33:12,295 INFO L225 Difference]: With dead ends: 98 [2021-06-05 04:33:12,295 INFO L226 Difference]: Without dead ends: 92 [2021-06-05 04:33:12,295 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 248.5ms TimeCoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:33:12,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-06-05 04:33:12,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2021-06-05 04:33:12,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 2.1868131868131866) internal successors, (199), 91 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:12,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 199 transitions. [2021-06-05 04:33:12,296 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 199 transitions. Word has length 17 [2021-06-05 04:33:12,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:33:12,296 INFO L482 AbstractCegarLoop]: Abstraction has 92 states and 199 transitions. [2021-06-05 04:33:12,296 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 04:33:12,296 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 199 transitions. [2021-06-05 04:33:12,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:33:12,296 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:33:12,296 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:33:12,496 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1008 [2021-06-05 04:33:12,496 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:33:12,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:33:12,497 INFO L82 PathProgramCache]: Analyzing trace with hash 759196754, now seen corresponding path program 164 times [2021-06-05 04:33:12,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:33:12,497 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93497113] [2021-06-05 04:33:12,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:33:12,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:33:12,550 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 04:33:12,550 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:33:12,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93497113] [2021-06-05 04:33:12,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93497113] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:12,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120782359] [2021-06-05 04:33:12,551 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:33:12,579 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:33:12,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:33:12,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:33:12,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:33:12,681 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 04:33:12,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [120782359] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:12,681 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:33:12,681 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:33:12,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503526369] [2021-06-05 04:33:12,681 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:33:12,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:33:12,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:33:12,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:33:12,682 INFO L87 Difference]: Start difference. First operand 92 states and 199 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:12,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:33:12,771 INFO L93 Difference]: Finished difference Result 101 states and 214 transitions. [2021-06-05 04:33:12,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:33:12,771 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 04:33:12,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:33:12,772 INFO L225 Difference]: With dead ends: 101 [2021-06-05 04:33:12,772 INFO L226 Difference]: Without dead ends: 101 [2021-06-05 04:33:12,772 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 111.3ms TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:33:12,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-06-05 04:33:12,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 83. [2021-06-05 04:33:12,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 2.1707317073170733) internal successors, (178), 82 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:12,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 178 transitions. [2021-06-05 04:33:12,773 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 178 transitions. Word has length 17 [2021-06-05 04:33:12,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:33:12,773 INFO L482 AbstractCegarLoop]: Abstraction has 83 states and 178 transitions. [2021-06-05 04:33:12,773 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 04:33:12,773 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 178 transitions. [2021-06-05 04:33:12,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:33:12,773 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:33:12,773 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:33:12,973 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1013 [2021-06-05 04:33:12,974 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:33:12,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:33:12,974 INFO L82 PathProgramCache]: Analyzing trace with hash 438642694, now seen corresponding path program 165 times [2021-06-05 04:33:12,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:33:12,974 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179501408] [2021-06-05 04:33:12,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:33:12,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:33:13,042 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:33:13,042 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:33:13,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179501408] [2021-06-05 04:33:13,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179501408] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:13,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967262099] [2021-06-05 04:33:13,042 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:33:13,065 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:33:13,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:33:13,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:33:13,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:33:13,141 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 04:33:13,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [967262099] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:13,142 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:33:13,142 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:33:13,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814729751] [2021-06-05 04:33:13,142 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:33:13,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:33:13,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:33:13,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:33:13,143 INFO L87 Difference]: Start difference. First operand 83 states and 178 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:13,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:33:13,332 INFO L93 Difference]: Finished difference Result 98 states and 203 transitions. [2021-06-05 04:33:13,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:33:13,332 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 04:33:13,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:33:13,333 INFO L225 Difference]: With dead ends: 98 [2021-06-05 04:33:13,333 INFO L226 Difference]: Without dead ends: 92 [2021-06-05 04:33:13,333 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 216.8ms TimeCoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:33:13,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-06-05 04:33:13,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 83. [2021-06-05 04:33:13,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 2.158536585365854) internal successors, (177), 82 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:13,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 177 transitions. [2021-06-05 04:33:13,334 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 177 transitions. Word has length 17 [2021-06-05 04:33:13,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:33:13,334 INFO L482 AbstractCegarLoop]: Abstraction has 83 states and 177 transitions. [2021-06-05 04:33:13,334 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 04:33:13,334 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 177 transitions. [2021-06-05 04:33:13,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:33:13,334 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:33:13,334 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:33:13,534 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1017,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:33:13,534 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:33:13,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:33:13,535 INFO L82 PathProgramCache]: Analyzing trace with hash 2086701778, now seen corresponding path program 166 times [2021-06-05 04:33:13,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:33:13,535 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654544592] [2021-06-05 04:33:13,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:33:13,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:33:13,595 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:33:13,595 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:33:13,595 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654544592] [2021-06-05 04:33:13,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654544592] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:13,595 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008402844] [2021-06-05 04:33:13,595 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:33:13,619 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:33:13,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:33:13,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:33:13,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:33:13,696 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:13,696 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:13,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:33:13,697 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:13,699 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:13,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:33:13,700 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:13,714 INFO L628 ElimStorePlain]: treesize reduction 29, result has 32.6 percent of original size [2021-06-05 04:33:13,714 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 04:33:13,714 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:33:13,714 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:57, output treesize:6 [2021-06-05 04:33:13,727 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 04:33:13,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2008402844] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:13,727 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:33:13,727 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:33:13,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336438888] [2021-06-05 04:33:13,727 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:33:13,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:33:13,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:33:13,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:33:13,728 INFO L87 Difference]: Start difference. First operand 83 states and 177 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:13,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:33:13,864 INFO L93 Difference]: Finished difference Result 114 states and 239 transitions. [2021-06-05 04:33:13,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:33:13,864 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 04:33:13,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:33:13,865 INFO L225 Difference]: With dead ends: 114 [2021-06-05 04:33:13,865 INFO L226 Difference]: Without dead ends: 114 [2021-06-05 04:33:13,865 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 155.1ms TimeCoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:33:13,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-06-05 04:33:13,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 83. [2021-06-05 04:33:13,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 2.158536585365854) internal successors, (177), 82 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:13,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 177 transitions. [2021-06-05 04:33:13,866 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 177 transitions. Word has length 17 [2021-06-05 04:33:13,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:33:13,866 INFO L482 AbstractCegarLoop]: Abstraction has 83 states and 177 transitions. [2021-06-05 04:33:13,866 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 04:33:13,866 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 177 transitions. [2021-06-05 04:33:13,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:33:13,866 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:33:13,866 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:33:14,066 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1021,167 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:33:14,067 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:33:14,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:33:14,067 INFO L82 PathProgramCache]: Analyzing trace with hash 1300647758, now seen corresponding path program 167 times [2021-06-05 04:33:14,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:33:14,067 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842128799] [2021-06-05 04:33:14,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:33:14,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:33:14,140 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 04:33:14,140 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:33:14,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842128799] [2021-06-05 04:33:14,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842128799] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:14,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398292664] [2021-06-05 04:33:14,140 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:33:14,163 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:33:14,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:33:14,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:33:14,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:33:14,266 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 04:33:14,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1398292664] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:14,266 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:33:14,266 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:33:14,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889597738] [2021-06-05 04:33:14,267 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:33:14,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:33:14,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:33:14,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:33:14,267 INFO L87 Difference]: Start difference. First operand 83 states and 177 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:14,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:33:14,531 INFO L93 Difference]: Finished difference Result 118 states and 238 transitions. [2021-06-05 04:33:14,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:33:14,532 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 04:33:14,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:33:14,532 INFO L225 Difference]: With dead ends: 118 [2021-06-05 04:33:14,532 INFO L226 Difference]: Without dead ends: 115 [2021-06-05 04:33:14,532 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 245.2ms TimeCoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:33:14,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-06-05 04:33:14,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 88. [2021-06-05 04:33:14,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 2.1724137931034484) internal successors, (189), 87 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:14,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 189 transitions. [2021-06-05 04:33:14,534 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 189 transitions. Word has length 17 [2021-06-05 04:33:14,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:33:14,534 INFO L482 AbstractCegarLoop]: Abstraction has 88 states and 189 transitions. [2021-06-05 04:33:14,534 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 04:33:14,534 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 189 transitions. [2021-06-05 04:33:14,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:33:14,534 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:33:14,534 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:33:14,743 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1025,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:33:14,743 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:33:14,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:33:14,743 INFO L82 PathProgramCache]: Analyzing trace with hash 1076716290, now seen corresponding path program 168 times [2021-06-05 04:33:14,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:33:14,743 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320858552] [2021-06-05 04:33:14,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:33:14,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:33:14,802 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:33:14,802 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:33:14,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320858552] [2021-06-05 04:33:14,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320858552] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:14,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735731953] [2021-06-05 04:33:14,802 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:33:14,826 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:33:14,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:33:14,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:33:14,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:33:14,903 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:14,904 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:14,904 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 04:33:14,904 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:14,911 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:14,911 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:14,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:33:14,912 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:14,914 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:14,914 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:14,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:33:14,915 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:14,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:14,917 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 16 treesize of output 12 [2021-06-05 04:33:14,918 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:14,949 INFO L628 ElimStorePlain]: treesize reduction 53, result has 36.9 percent of original size [2021-06-05 04:33:14,949 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 04:33:14,949 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 04:33:14,950 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:121, output treesize:15 [2021-06-05 04:33:14,982 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 04:33:14,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [735731953] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:14,982 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:33:14,982 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:33:14,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922048993] [2021-06-05 04:33:14,983 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:33:14,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:33:14,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:33:14,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:33:14,983 INFO L87 Difference]: Start difference. First operand 88 states and 189 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:15,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:33:15,266 INFO L93 Difference]: Finished difference Result 139 states and 283 transitions. [2021-06-05 04:33:15,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:33:15,267 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 04:33:15,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:33:15,267 INFO L225 Difference]: With dead ends: 139 [2021-06-05 04:33:15,267 INFO L226 Difference]: Without dead ends: 139 [2021-06-05 04:33:15,267 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 260.5ms TimeCoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:33:15,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-06-05 04:33:15,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 88. [2021-06-05 04:33:15,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 2.1724137931034484) internal successors, (189), 87 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:15,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 189 transitions. [2021-06-05 04:33:15,269 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 189 transitions. Word has length 17 [2021-06-05 04:33:15,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:33:15,269 INFO L482 AbstractCegarLoop]: Abstraction has 88 states and 189 transitions. [2021-06-05 04:33:15,269 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 04:33:15,269 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 189 transitions. [2021-06-05 04:33:15,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:33:15,269 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:33:15,269 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:33:15,484 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1035 [2021-06-05 04:33:15,484 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:33:15,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:33:15,484 INFO L82 PathProgramCache]: Analyzing trace with hash -334074542, now seen corresponding path program 169 times [2021-06-05 04:33:15,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:33:15,484 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811750269] [2021-06-05 04:33:15,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:33:15,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:33:15,544 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 04:33:15,544 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:33:15,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811750269] [2021-06-05 04:33:15,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811750269] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:15,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1486592383] [2021-06-05 04:33:15,545 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:33:15,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:33:15,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:33:15,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:33:15,646 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:15,647 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:15,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:33:15,648 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:15,650 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:15,650 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:15,651 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 15 treesize of output 11 [2021-06-05 04:33:15,651 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:15,653 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:15,654 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:15,654 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 16 treesize of output 12 [2021-06-05 04:33:15,655 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:15,656 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:15,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:33:15,658 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:15,689 INFO L628 ElimStorePlain]: treesize reduction 53, result has 36.9 percent of original size [2021-06-05 04:33:15,689 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 04:33:15,690 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 04:33:15,690 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:121, output treesize:15 [2021-06-05 04:33:15,714 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 04:33:15,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1486592383] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:15,714 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:33:15,714 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:33:15,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500651144] [2021-06-05 04:33:15,714 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:33:15,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:33:15,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:33:15,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:33:15,715 INFO L87 Difference]: Start difference. First operand 88 states and 189 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:15,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:33:15,925 INFO L93 Difference]: Finished difference Result 115 states and 240 transitions. [2021-06-05 04:33:15,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:33:15,925 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 04:33:15,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:33:15,925 INFO L225 Difference]: With dead ends: 115 [2021-06-05 04:33:15,925 INFO L226 Difference]: Without dead ends: 113 [2021-06-05 04:33:15,925 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 203.4ms TimeCoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:33:15,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-06-05 04:33:15,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 88. [2021-06-05 04:33:15,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 2.160919540229885) internal successors, (188), 87 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:15,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 188 transitions. [2021-06-05 04:33:15,927 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 188 transitions. Word has length 17 [2021-06-05 04:33:15,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:33:15,927 INFO L482 AbstractCegarLoop]: Abstraction has 88 states and 188 transitions. [2021-06-05 04:33:15,927 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 04:33:15,927 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 188 transitions. [2021-06-05 04:33:15,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:33:15,927 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:33:15,927 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:33:16,127 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 170 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1047 [2021-06-05 04:33:16,127 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:33:16,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:33:16,128 INFO L82 PathProgramCache]: Analyzing trace with hash -1858134266, now seen corresponding path program 170 times [2021-06-05 04:33:16,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:33:16,128 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775933158] [2021-06-05 04:33:16,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:33:16,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:33:16,211 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 04:33:16,211 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:33:16,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775933158] [2021-06-05 04:33:16,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775933158] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:16,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [207018137] [2021-06-05 04:33:16,211 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:33:16,234 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:33:16,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:33:16,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 04:33:16,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:33:16,309 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:16,310 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:16,310 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 18 treesize of output 14 [2021-06-05 04:33:16,311 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:16,313 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:16,313 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:16,313 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 18 treesize of output 14 [2021-06-05 04:33:16,314 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:16,316 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:16,316 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:16,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:33:16,317 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:16,319 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:16,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:33:16,320 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:16,359 INFO L628 ElimStorePlain]: treesize reduction 65, result has 38.1 percent of original size [2021-06-05 04:33:16,361 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:16,361 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 9 treesize of output 5 [2021-06-05 04:33:16,362 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:33:16,378 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:33:16,379 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 04:33:16,379 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:133, output treesize:22 [2021-06-05 04:33:16,415 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 04:33:16,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [207018137] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:16,415 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:33:16,415 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:33:16,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993131719] [2021-06-05 04:33:16,415 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:33:16,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:33:16,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:33:16,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:33:16,416 INFO L87 Difference]: Start difference. First operand 88 states and 188 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:16,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:33:16,559 INFO L93 Difference]: Finished difference Result 101 states and 213 transitions. [2021-06-05 04:33:16,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:33:16,559 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 04:33:16,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:33:16,559 INFO L225 Difference]: With dead ends: 101 [2021-06-05 04:33:16,559 INFO L226 Difference]: Without dead ends: 101 [2021-06-05 04:33:16,560 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 176.2ms TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:33:16,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-06-05 04:33:16,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 82. [2021-06-05 04:33:16,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 2.1604938271604937) internal successors, (175), 81 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:16,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 175 transitions. [2021-06-05 04:33:16,561 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 175 transitions. Word has length 17 [2021-06-05 04:33:16,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:33:16,561 INFO L482 AbstractCegarLoop]: Abstraction has 82 states and 175 transitions. [2021-06-05 04:33:16,561 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 04:33:16,561 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 175 transitions. [2021-06-05 04:33:16,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:33:16,561 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:33:16,561 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:33:16,761 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1058 [2021-06-05 04:33:16,761 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:33:16,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:33:16,762 INFO L82 PathProgramCache]: Analyzing trace with hash -806136362, now seen corresponding path program 171 times [2021-06-05 04:33:16,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:33:16,762 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267400152] [2021-06-05 04:33:16,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:33:16,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:33:16,821 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 04:33:16,821 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:33:16,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267400152] [2021-06-05 04:33:16,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267400152] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:16,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772322460] [2021-06-05 04:33:16,821 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:33:16,844 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:33:16,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:33:16,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:33:16,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:33:16,968 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 04:33:16,969 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [772322460] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:16,969 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:33:16,969 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:33:16,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469703536] [2021-06-05 04:33:16,969 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:33:16,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:33:16,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:33:16,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:33:16,969 INFO L87 Difference]: Start difference. First operand 82 states and 175 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:17,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:33:17,175 INFO L93 Difference]: Finished difference Result 126 states and 251 transitions. [2021-06-05 04:33:17,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:33:17,175 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 04:33:17,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:33:17,176 INFO L225 Difference]: With dead ends: 126 [2021-06-05 04:33:17,176 INFO L226 Difference]: Without dead ends: 123 [2021-06-05 04:33:17,176 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 217.2ms TimeCoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:33:17,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-06-05 04:33:17,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 87. [2021-06-05 04:33:17,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 2.1627906976744184) internal successors, (186), 86 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:17,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 186 transitions. [2021-06-05 04:33:17,177 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 186 transitions. Word has length 17 [2021-06-05 04:33:17,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:33:17,177 INFO L482 AbstractCegarLoop]: Abstraction has 87 states and 186 transitions. [2021-06-05 04:33:17,177 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 04:33:17,177 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 186 transitions. [2021-06-05 04:33:17,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:33:17,177 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:33:17,177 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:33:17,377 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1062,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:33:17,378 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:33:17,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:33:17,378 INFO L82 PathProgramCache]: Analyzing trace with hash -1030067830, now seen corresponding path program 172 times [2021-06-05 04:33:17,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:33:17,378 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380399532] [2021-06-05 04:33:17,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:33:17,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:33:17,471 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:33:17,471 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:33:17,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380399532] [2021-06-05 04:33:17,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380399532] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:17,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010245133] [2021-06-05 04:33:17,471 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:33:17,495 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:33:17,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:33:17,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:33:17,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:33:17,576 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:17,576 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:17,577 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 17 treesize of output 13 [2021-06-05 04:33:17,577 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:17,580 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:17,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:33:17,580 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:17,617 INFO L628 ElimStorePlain]: treesize reduction 60, result has 38.8 percent of original size [2021-06-05 04:33:17,617 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 04:33:17,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index 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 04:33:17,619 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:17,632 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:33:17,632 INFO L518 ElimStorePlain]: Eliminatee v_prenex_131 vanished before elimination [2021-06-05 04:33:17,633 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 04:33:17,633 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-06-05 04:33:17,668 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 04:33:17,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2010245133] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:17,668 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:33:17,668 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:33:17,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134520451] [2021-06-05 04:33:17,669 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:33:17,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:33:17,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:33:17,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:33:17,669 INFO L87 Difference]: Start difference. First operand 87 states and 186 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:17,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:33:17,931 INFO L93 Difference]: Finished difference Result 120 states and 243 transitions. [2021-06-05 04:33:17,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:33:17,931 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 04:33:17,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:33:17,931 INFO L225 Difference]: With dead ends: 120 [2021-06-05 04:33:17,931 INFO L226 Difference]: Without dead ends: 120 [2021-06-05 04:33:17,931 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 289.6ms TimeCoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:33:17,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-06-05 04:33:17,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 87. [2021-06-05 04:33:17,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 2.1627906976744184) internal successors, (186), 86 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:17,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 186 transitions. [2021-06-05 04:33:17,933 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 186 transitions. Word has length 17 [2021-06-05 04:33:17,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:33:17,933 INFO L482 AbstractCegarLoop]: Abstraction has 87 states and 186 transitions. [2021-06-05 04:33:17,933 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 04:33:17,933 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 186 transitions. [2021-06-05 04:33:17,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:33:17,933 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:33:17,933 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:33:18,133 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1073,173 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:33:18,134 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:33:18,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:33:18,134 INFO L82 PathProgramCache]: Analyzing trace with hash 1854108634, now seen corresponding path program 173 times [2021-06-05 04:33:18,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:33:18,134 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811097301] [2021-06-05 04:33:18,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:33:18,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:33:18,213 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 04:33:18,213 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:33:18,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811097301] [2021-06-05 04:33:18,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811097301] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:18,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257091648] [2021-06-05 04:33:18,213 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 04:33:18,245 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:33:18,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:33:18,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:33:18,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:33:18,327 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:18,328 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:18,328 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 17 treesize of output 13 [2021-06-05 04:33:18,329 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:18,331 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:18,331 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 04:33:18,332 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:18,368 INFO L628 ElimStorePlain]: treesize reduction 60, result has 38.8 percent of original size [2021-06-05 04:33:18,368 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 04:33:18,370 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 7 treesize of output 5 [2021-06-05 04:33:18,371 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:18,383 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:33:18,384 INFO L518 ElimStorePlain]: Eliminatee v_prenex_134 vanished before elimination [2021-06-05 04:33:18,384 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 04:33:18,385 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-06-05 04:33:18,410 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 04:33:18,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [257091648] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:18,410 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:33:18,410 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:33:18,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989963415] [2021-06-05 04:33:18,411 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:33:18,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:33:18,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:33:18,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:33:18,411 INFO L87 Difference]: Start difference. First operand 87 states and 186 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:18,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:33:18,766 INFO L93 Difference]: Finished difference Result 118 states and 236 transitions. [2021-06-05 04:33:18,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:33:18,766 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 04:33:18,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:33:18,766 INFO L225 Difference]: With dead ends: 118 [2021-06-05 04:33:18,766 INFO L226 Difference]: Without dead ends: 116 [2021-06-05 04:33:18,767 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 342.7ms TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:33:18,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-06-05 04:33:18,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 87. [2021-06-05 04:33:18,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 2.1511627906976742) internal successors, (185), 86 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:18,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 185 transitions. [2021-06-05 04:33:18,768 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 185 transitions. Word has length 17 [2021-06-05 04:33:18,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:33:18,768 INFO L482 AbstractCegarLoop]: Abstraction has 87 states and 185 transitions. [2021-06-05 04:33:18,768 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 04:33:18,768 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 185 transitions. [2021-06-05 04:33:18,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:33:18,768 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:33:18,768 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:33:18,969 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1080,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:33:18,969 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:33:18,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:33:18,969 INFO L82 PathProgramCache]: Analyzing trace with hash 330048910, now seen corresponding path program 174 times [2021-06-05 04:33:18,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:33:18,969 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073026310] [2021-06-05 04:33:18,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:33:18,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:33:19,040 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 04:33:19,041 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:33:19,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073026310] [2021-06-05 04:33:19,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073026310] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:19,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678819630] [2021-06-05 04:33:19,041 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 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 04:33:19,076 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:33:19,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:33:19,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:33:19,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:33:19,202 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 04:33:19,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [678819630] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:19,203 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:33:19,203 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:33:19,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812264930] [2021-06-05 04:33:19,203 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:33:19,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:33:19,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:33:19,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:33:19,203 INFO L87 Difference]: Start difference. First operand 87 states and 185 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:19,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:33:19,427 INFO L93 Difference]: Finished difference Result 132 states and 265 transitions. [2021-06-05 04:33:19,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:33:19,427 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 04:33:19,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:33:19,428 INFO L225 Difference]: With dead ends: 132 [2021-06-05 04:33:19,428 INFO L226 Difference]: Without dead ends: 132 [2021-06-05 04:33:19,428 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 237.6ms TimeCoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:33:19,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-06-05 04:33:19,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 86. [2021-06-05 04:33:19,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 2.152941176470588) internal successors, (183), 85 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:19,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 183 transitions. [2021-06-05 04:33:19,429 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 183 transitions. Word has length 17 [2021-06-05 04:33:19,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:33:19,429 INFO L482 AbstractCegarLoop]: Abstraction has 86 states and 183 transitions. [2021-06-05 04:33:19,429 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 04:33:19,429 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 183 transitions. [2021-06-05 04:33:19,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:33:19,429 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:33:19,429 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:33:19,632 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1088 [2021-06-05 04:33:19,633 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:33:19,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:33:19,633 INFO L82 PathProgramCache]: Analyzing trace with hash -1903003084, now seen corresponding path program 175 times [2021-06-05 04:33:19,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:33:19,633 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111836900] [2021-06-05 04:33:19,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:33:19,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:33:19,701 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:33:19,701 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:33:19,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111836900] [2021-06-05 04:33:19,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111836900] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:19,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236777976] [2021-06-05 04:33:19,702 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:33:19,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:33:19,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:33:19,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:33:19,832 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 04:33:19,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1236777976] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:19,832 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:33:19,832 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:33:19,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719569524] [2021-06-05 04:33:19,832 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:33:19,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:33:19,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:33:19,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:33:19,833 INFO L87 Difference]: Start difference. First operand 86 states and 183 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:20,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:33:20,062 INFO L93 Difference]: Finished difference Result 94 states and 195 transitions. [2021-06-05 04:33:20,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:33:20,062 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 04:33:20,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:33:20,062 INFO L225 Difference]: With dead ends: 94 [2021-06-05 04:33:20,062 INFO L226 Difference]: Without dead ends: 90 [2021-06-05 04:33:20,062 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 246.6ms TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:33:20,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-06-05 04:33:20,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 86. [2021-06-05 04:33:20,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 2.1411764705882352) internal successors, (182), 85 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:20,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 182 transitions. [2021-06-05 04:33:20,063 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 182 transitions. Word has length 17 [2021-06-05 04:33:20,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:33:20,063 INFO L482 AbstractCegarLoop]: Abstraction has 86 states and 182 transitions. [2021-06-05 04:33:20,063 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 04:33:20,063 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 182 transitions. [2021-06-05 04:33:20,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:33:20,064 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:33:20,064 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:33:20,276 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1098,176 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:33:20,277 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:33:20,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:33:20,277 INFO L82 PathProgramCache]: Analyzing trace with hash -1816121850, now seen corresponding path program 176 times [2021-06-05 04:33:20,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:33:20,277 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757373193] [2021-06-05 04:33:20,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:33:20,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:33:20,336 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 04:33:20,337 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:33:20,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757373193] [2021-06-05 04:33:20,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757373193] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:20,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1513579473] [2021-06-05 04:33:20,337 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:33:20,363 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:33:20,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:33:20,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 04:33:20,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:33:20,441 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:20,441 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:20,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:33:20,442 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:20,444 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:20,444 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 17 treesize of output 13 [2021-06-05 04:33:20,445 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:20,463 INFO L628 ElimStorePlain]: treesize reduction 28, result has 42.9 percent of original size [2021-06-05 04:33:20,465 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:20,465 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 9 treesize of output 5 [2021-06-05 04:33:20,466 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:33:20,471 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:33:20,472 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 04:33:20,472 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:63, output treesize:9 [2021-06-05 04:33:20,488 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 04:33:20,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1513579473] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:20,489 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:33:20,489 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:33:20,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007642049] [2021-06-05 04:33:20,489 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:33:20,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:33:20,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:33:20,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:33:20,489 INFO L87 Difference]: Start difference. First operand 86 states and 182 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:20,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:33:20,640 INFO L93 Difference]: Finished difference Result 105 states and 218 transitions. [2021-06-05 04:33:20,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:33:20,641 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 04:33:20,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:33:20,641 INFO L225 Difference]: With dead ends: 105 [2021-06-05 04:33:20,641 INFO L226 Difference]: Without dead ends: 105 [2021-06-05 04:33:20,641 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 144.0ms TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:33:20,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-06-05 04:33:20,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 79. [2021-06-05 04:33:20,642 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 04:33:20,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 166 transitions. [2021-06-05 04:33:20,642 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 166 transitions. Word has length 17 [2021-06-05 04:33:20,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:33:20,642 INFO L482 AbstractCegarLoop]: Abstraction has 79 states and 166 transitions. [2021-06-05 04:33:20,642 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 04:33:20,642 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 166 transitions. [2021-06-05 04:33:20,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:33:20,643 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:33:20,643 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:33:20,844 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 177 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1103 [2021-06-05 04:33:20,845 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:33:20,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:33:20,845 INFO L82 PathProgramCache]: Analyzing trace with hash -1691934642, now seen corresponding path program 177 times [2021-06-05 04:33:20,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:33:20,845 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671417934] [2021-06-05 04:33:20,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:33:20,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:33:20,900 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 04:33:20,901 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:33:20,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671417934] [2021-06-05 04:33:20,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671417934] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:20,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138567152] [2021-06-05 04:33:20,901 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:33:20,926 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:33:20,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:33:20,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 04:33:20,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:33:21,014 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:21,015 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:21,015 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 18 treesize of output 14 [2021-06-05 04:33:21,016 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:21,018 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:21,018 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 18 treesize of output 14 [2021-06-05 04:33:21,019 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:21,062 INFO L628 ElimStorePlain]: treesize reduction 72, result has 39.5 percent of original size [2021-06-05 04:33:21,063 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 04:33:21,065 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:21,065 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 17 treesize of output 13 [2021-06-05 04:33:21,066 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:21,081 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:33:21,083 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:21,084 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 9 treesize of output 5 [2021-06-05 04:33:21,085 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:33:21,099 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:33:21,101 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 04:33:21,102 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:133, output treesize:22 [2021-06-05 04:33:21,130 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 04:33:21,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1138567152] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:21,131 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:33:21,131 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:33:21,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144728666] [2021-06-05 04:33:21,131 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:33:21,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:33:21,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:33:21,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:33:21,131 INFO L87 Difference]: Start difference. First operand 79 states and 166 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:21,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:33:21,243 INFO L93 Difference]: Finished difference Result 109 states and 213 transitions. [2021-06-05 04:33:21,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:33:21,243 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 04:33:21,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:33:21,244 INFO L225 Difference]: With dead ends: 109 [2021-06-05 04:33:21,244 INFO L226 Difference]: Without dead ends: 106 [2021-06-05 04:33:21,244 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 128.0ms TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:33:21,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-06-05 04:33:21,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 85. [2021-06-05 04:33:21,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 2.142857142857143) internal successors, (180), 84 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:21,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 180 transitions. [2021-06-05 04:33:21,245 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 180 transitions. Word has length 17 [2021-06-05 04:33:21,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:33:21,245 INFO L482 AbstractCegarLoop]: Abstraction has 85 states and 180 transitions. [2021-06-05 04:33:21,245 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 04:33:21,245 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 180 transitions. [2021-06-05 04:33:21,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:33:21,245 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:33:21,245 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:33:21,445 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1105 [2021-06-05 04:33:21,446 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:33:21,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:33:21,446 INFO L82 PathProgramCache]: Analyzing trace with hash -1265797140, now seen corresponding path program 178 times [2021-06-05 04:33:21,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:33:21,446 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961383158] [2021-06-05 04:33:21,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:33:21,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:33:21,516 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 04:33:21,516 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:33:21,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961383158] [2021-06-05 04:33:21,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961383158] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:21,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445744715] [2021-06-05 04:33:21,516 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 04:33:21,538 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:33:21,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:33:21,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:33:21,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:33:21,640 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:21,641 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:21,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:33:21,643 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:21,645 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:21,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:33:21,646 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:21,682 INFO L628 ElimStorePlain]: treesize reduction 60, result has 38.8 percent of original size [2021-06-05 04:33:21,682 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 04:33:21,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index 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 04:33:21,685 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:21,697 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:33:21,697 INFO L518 ElimStorePlain]: Eliminatee v_prenex_141 vanished before elimination [2021-06-05 04:33:21,698 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 04:33:21,698 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-06-05 04:33:21,733 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 04:33:21,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [445744715] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:21,733 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:33:21,733 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:33:21,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952413835] [2021-06-05 04:33:21,733 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:33:21,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:33:21,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:33:21,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:33:21,734 INFO L87 Difference]: Start difference. First operand 85 states and 180 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:22,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:33:22,000 INFO L93 Difference]: Finished difference Result 109 states and 214 transitions. [2021-06-05 04:33:22,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:33:22,000 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 04:33:22,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:33:22,000 INFO L225 Difference]: With dead ends: 109 [2021-06-05 04:33:22,000 INFO L226 Difference]: Without dead ends: 109 [2021-06-05 04:33:22,001 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 276.1ms TimeCoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:33:22,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-06-05 04:33:22,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 82. [2021-06-05 04:33:22,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 2.074074074074074) internal successors, (168), 81 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:22,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 168 transitions. [2021-06-05 04:33:22,001 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 168 transitions. Word has length 17 [2021-06-05 04:33:22,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:33:22,002 INFO L482 AbstractCegarLoop]: Abstraction has 82 states and 168 transitions. [2021-06-05 04:33:22,002 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 04:33:22,002 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 168 transitions. [2021-06-05 04:33:22,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:33:22,002 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:33:22,002 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:33:22,202 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 179 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1110 [2021-06-05 04:33:22,202 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:33:22,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:33:22,203 INFO L82 PathProgramCache]: Analyzing trace with hash -555749370, now seen corresponding path program 179 times [2021-06-05 04:33:22,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:33:22,203 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913912487] [2021-06-05 04:33:22,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:33:22,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:33:22,258 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 04:33:22,258 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:33:22,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913912487] [2021-06-05 04:33:22,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913912487] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:22,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1665491085] [2021-06-05 04:33:22,258 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:33:22,281 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:33:22,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:33:22,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:33:22,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:33:22,424 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 04:33:22,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1665491085] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:22,425 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:33:22,425 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:33:22,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949249270] [2021-06-05 04:33:22,425 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:33:22,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:33:22,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:33:22,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:33:22,426 INFO L87 Difference]: Start difference. First operand 82 states and 168 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:22,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:33:22,551 INFO L93 Difference]: Finished difference Result 106 states and 204 transitions. [2021-06-05 04:33:22,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:33:22,551 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 04:33:22,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:33:22,551 INFO L225 Difference]: With dead ends: 106 [2021-06-05 04:33:22,551 INFO L226 Difference]: Without dead ends: 106 [2021-06-05 04:33:22,552 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 149.2ms TimeCoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:33:22,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-06-05 04:33:22,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 81. [2021-06-05 04:33:22,552 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 04:33:22,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 166 transitions. [2021-06-05 04:33:22,553 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 166 transitions. Word has length 17 [2021-06-05 04:33:22,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:33:22,553 INFO L482 AbstractCegarLoop]: Abstraction has 81 states and 166 transitions. [2021-06-05 04:33:22,553 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 04:33:22,553 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 166 transitions. [2021-06-05 04:33:22,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:33:22,553 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:33:22,553 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:33:22,753 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1117,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:33:22,753 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:33:22,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:33:22,754 INFO L82 PathProgramCache]: Analyzing trace with hash 1506165932, now seen corresponding path program 180 times [2021-06-05 04:33:22,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:33:22,754 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361140109] [2021-06-05 04:33:22,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:33:22,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:33:22,822 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 04:33:22,822 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:33:22,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361140109] [2021-06-05 04:33:22,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361140109] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:22,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674642459] [2021-06-05 04:33:22,822 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:33:22,851 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 04:33:22,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:33:22,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 04:33:22,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:33:22,986 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 04:33:22,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [674642459] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:22,987 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:33:22,987 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:33:22,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289248628] [2021-06-05 04:33:22,987 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:33:22,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:33:22,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:33:22,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:33:22,987 INFO L87 Difference]: Start difference. First operand 81 states and 166 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:23,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:33:23,122 INFO L93 Difference]: Finished difference Result 89 states and 176 transitions. [2021-06-05 04:33:23,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:33:23,122 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 04:33:23,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:33:23,123 INFO L225 Difference]: With dead ends: 89 [2021-06-05 04:33:23,123 INFO L226 Difference]: Without dead ends: 85 [2021-06-05 04:33:23,123 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 172.3ms TimeCoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:33:23,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-06-05 04:33:23,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 81. [2021-06-05 04:33:23,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 2.0625) internal successors, (165), 80 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:23,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 165 transitions. [2021-06-05 04:33:23,124 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 165 transitions. Word has length 17 [2021-06-05 04:33:23,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:33:23,124 INFO L482 AbstractCegarLoop]: Abstraction has 81 states and 165 transitions. [2021-06-05 04:33:23,124 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 04:33:23,124 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 165 transitions. [2021-06-05 04:33:23,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:33:23,124 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:33:23,124 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:33:23,324 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1129,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:33:23,325 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:33:23,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:33:23,325 INFO L82 PathProgramCache]: Analyzing trace with hash 1593047166, now seen corresponding path program 181 times [2021-06-05 04:33:23,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:33:23,325 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123116642] [2021-06-05 04:33:23,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:33:23,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:33:23,378 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 04:33:23,379 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:33:23,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123116642] [2021-06-05 04:33:23,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123116642] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:23,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800593131] [2021-06-05 04:33:23,379 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:33:23,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:33:23,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:33:23,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:33:23,507 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 04:33:23,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1800593131] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:23,507 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:33:23,507 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:33:23,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646604816] [2021-06-05 04:33:23,507 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:33:23,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:33:23,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:33:23,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:33:23,508 INFO L87 Difference]: Start difference. First operand 81 states and 165 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:23,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:33:23,601 INFO L93 Difference]: Finished difference Result 101 states and 201 transitions. [2021-06-05 04:33:23,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:33:23,601 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 04:33:23,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:33:23,601 INFO L225 Difference]: With dead ends: 101 [2021-06-05 04:33:23,601 INFO L226 Difference]: Without dead ends: 101 [2021-06-05 04:33:23,602 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 108.0ms TimeCoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:33:23,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-06-05 04:33:23,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 80. [2021-06-05 04:33:23,602 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 04:33:23,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 163 transitions. [2021-06-05 04:33:23,602 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 163 transitions. Word has length 17 [2021-06-05 04:33:23,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:33:23,603 INFO L482 AbstractCegarLoop]: Abstraction has 80 states and 163 transitions. [2021-06-05 04:33:23,603 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 04:33:23,603 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 163 transitions. [2021-06-05 04:33:23,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:33:23,603 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:33:23,603 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:33:23,803 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1134,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:33:23,803 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:33:23,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:33:23,804 INFO L82 PathProgramCache]: Analyzing trace with hash 999819666, now seen corresponding path program 182 times [2021-06-05 04:33:23,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:33:23,804 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307139247] [2021-06-05 04:33:23,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:33:23,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:33:23,875 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 04:33:23,876 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:33:23,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307139247] [2021-06-05 04:33:23,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307139247] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:23,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810721384] [2021-06-05 04:33:23,876 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 04:33:23,914 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:33:23,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:33:23,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 04:33:23,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:33:24,040 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 04:33:24,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [810721384] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:24,041 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:33:24,041 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:33:24,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910760891] [2021-06-05 04:33:24,041 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:33:24,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:33:24,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:33:24,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:33:24,041 INFO L87 Difference]: Start difference. First operand 80 states and 163 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:24,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:33:24,179 INFO L93 Difference]: Finished difference Result 86 states and 170 transitions. [2021-06-05 04:33:24,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:33:24,179 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 04:33:24,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:33:24,179 INFO L225 Difference]: With dead ends: 86 [2021-06-05 04:33:24,180 INFO L226 Difference]: Without dead ends: 80 [2021-06-05 04:33:24,180 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 170.0ms TimeCoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:33:24,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-06-05 04:33:24,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2021-06-05 04:33:24,181 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 04:33:24,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 162 transitions. [2021-06-05 04:33:24,181 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 162 transitions. Word has length 17 [2021-06-05 04:33:24,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:33:24,181 INFO L482 AbstractCegarLoop]: Abstraction has 80 states and 162 transitions. [2021-06-05 04:33:24,181 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 04:33:24,181 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 162 transitions. [2021-06-05 04:33:24,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:33:24,181 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:33:24,181 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:33:24,382 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1138 [2021-06-05 04:33:24,382 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:33:24,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:33:24,382 INFO L82 PathProgramCache]: Analyzing trace with hash -513736954, now seen corresponding path program 183 times [2021-06-05 04:33:24,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:33:24,382 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996488361] [2021-06-05 04:33:24,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:33:24,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:33:24,444 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 04:33:24,444 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:33:24,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996488361] [2021-06-05 04:33:24,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996488361] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:24,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [163053974] [2021-06-05 04:33:24,444 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:33:24,468 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:33:24,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:33:24,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 04:33:24,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:33:24,550 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:24,550 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:24,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:33:24,551 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:24,553 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:24,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:33:24,554 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:24,572 INFO L628 ElimStorePlain]: treesize reduction 28, result has 42.9 percent of original size [2021-06-05 04:33:24,573 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:24,573 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 9 treesize of output 5 [2021-06-05 04:33:24,575 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:33:24,581 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:33:24,581 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 04:33:24,582 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:63, output treesize:9 [2021-06-05 04:33:24,598 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 04:33:24,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [163053974] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:24,598 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:33:24,598 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:33:24,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968276611] [2021-06-05 04:33:24,598 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:33:24,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:33:24,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:33:24,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:33:24,599 INFO L87 Difference]: Start difference. First operand 80 states and 162 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:24,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:33:24,691 INFO L93 Difference]: Finished difference Result 89 states and 177 transitions. [2021-06-05 04:33:24,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:33:24,691 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 04:33:24,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:33:24,691 INFO L225 Difference]: With dead ends: 89 [2021-06-05 04:33:24,691 INFO L226 Difference]: Without dead ends: 89 [2021-06-05 04:33:24,691 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 115.6ms TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:33:24,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-06-05 04:33:24,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 72. [2021-06-05 04:33:24,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 2.0140845070422535) internal successors, (143), 71 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:24,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 143 transitions. [2021-06-05 04:33:24,692 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 143 transitions. Word has length 17 [2021-06-05 04:33:24,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:33:24,692 INFO L482 AbstractCegarLoop]: Abstraction has 72 states and 143 transitions. [2021-06-05 04:33:24,692 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 04:33:24,692 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 143 transitions. [2021-06-05 04:33:24,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:33:24,693 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:33:24,693 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:33:24,896 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1142,184 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:33:24,897 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:33:24,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:33:24,897 INFO L82 PathProgramCache]: Analyzing trace with hash 68118298, now seen corresponding path program 184 times [2021-06-05 04:33:24,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:33:24,897 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350361107] [2021-06-05 04:33:24,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:33:24,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:33:24,958 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 04:33:24,958 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:33:24,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350361107] [2021-06-05 04:33:24,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350361107] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:24,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033018511] [2021-06-05 04:33:24,958 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:33:24,981 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:33:24,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:33:24,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:33:24,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:33:25,134 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 04:33:25,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2033018511] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:25,134 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:33:25,134 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:33:25,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762497530] [2021-06-05 04:33:25,134 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:33:25,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:33:25,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:33:25,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:33:25,135 INFO L87 Difference]: Start difference. First operand 72 states and 143 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:25,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:33:25,332 INFO L93 Difference]: Finished difference Result 117 states and 217 transitions. [2021-06-05 04:33:25,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:33:25,332 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 04:33:25,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:33:25,332 INFO L225 Difference]: With dead ends: 117 [2021-06-05 04:33:25,332 INFO L226 Difference]: Without dead ends: 114 [2021-06-05 04:33:25,333 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 221.6ms TimeCoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:33:25,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-06-05 04:33:25,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 78. [2021-06-05 04:33:25,333 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 04:33:25,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 157 transitions. [2021-06-05 04:33:25,334 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 157 transitions. Word has length 17 [2021-06-05 04:33:25,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:33:25,334 INFO L482 AbstractCegarLoop]: Abstraction has 78 states and 157 transitions. [2021-06-05 04:33:25,334 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 04:33:25,334 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 157 transitions. [2021-06-05 04:33:25,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:33:25,334 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:33:25,334 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:33:25,534 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1144 [2021-06-05 04:33:25,534 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:33:25,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:33:25,535 INFO L82 PathProgramCache]: Analyzing trace with hash -155813170, now seen corresponding path program 185 times [2021-06-05 04:33:25,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:33:25,535 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975231538] [2021-06-05 04:33:25,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:33:25,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:33:25,622 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:33:25,622 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:33:25,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975231538] [2021-06-05 04:33:25,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975231538] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:25,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1652261032] [2021-06-05 04:33:25,622 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 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 04:33:25,645 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:33:25,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:33:25,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:33:25,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:33:25,767 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:25,768 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:25,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:33:25,769 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:25,771 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:25,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:33:25,772 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:25,808 INFO L628 ElimStorePlain]: treesize reduction 60, result has 38.8 percent of original size [2021-06-05 04:33:25,809 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 04:33:25,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index 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 04:33:25,811 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:25,823 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:33:25,823 INFO L518 ElimStorePlain]: Eliminatee v_prenex_148 vanished before elimination [2021-06-05 04:33:25,824 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 04:33:25,824 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-06-05 04:33:25,850 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 04:33:25,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1652261032] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:25,850 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:33:25,850 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:33:25,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915051951] [2021-06-05 04:33:25,850 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:33:25,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:33:25,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:33:25,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:33:25,851 INFO L87 Difference]: Start difference. First operand 78 states and 157 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:26,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:33:26,208 INFO L93 Difference]: Finished difference Result 99 states and 189 transitions. [2021-06-05 04:33:26,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:33:26,208 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 04:33:26,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:33:26,208 INFO L225 Difference]: With dead ends: 99 [2021-06-05 04:33:26,208 INFO L226 Difference]: Without dead ends: 99 [2021-06-05 04:33:26,208 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 406.6ms TimeCoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:33:26,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-06-05 04:33:26,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 78. [2021-06-05 04:33:26,209 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 04:33:26,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 157 transitions. [2021-06-05 04:33:26,209 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 157 transitions. Word has length 17 [2021-06-05 04:33:26,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:33:26,210 INFO L482 AbstractCegarLoop]: Abstraction has 78 states and 157 transitions. [2021-06-05 04:33:26,210 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 04:33:26,210 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 157 transitions. [2021-06-05 04:33:26,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:33:26,210 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:33:26,210 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:33:26,425 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 186 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1155 [2021-06-05 04:33:26,425 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:33:26,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:33:26,426 INFO L82 PathProgramCache]: Analyzing trace with hash 1204303570, now seen corresponding path program 186 times [2021-06-05 04:33:26,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:33:26,426 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129725365] [2021-06-05 04:33:26,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:33:26,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:33:26,488 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 04:33:26,489 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:33:26,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129725365] [2021-06-05 04:33:26,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129725365] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:26,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619435067] [2021-06-05 04:33:26,489 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:33:26,514 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:33:26,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:33:26,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 04:33:26,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:33:26,620 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:26,621 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:26,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:33:26,622 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:26,624 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:26,625 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 17 treesize of output 13 [2021-06-05 04:33:26,625 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:26,671 INFO L628 ElimStorePlain]: treesize reduction 70, result has 41.2 percent of original size [2021-06-05 04:33:26,674 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:26,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-06-05 04:33:26,675 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:33:26,692 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:33:26,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:33:26,695 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:26,709 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:33:26,710 INFO L518 ElimStorePlain]: Eliminatee v_prenex_151 vanished before elimination [2021-06-05 04:33:26,711 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 04:33:26,711 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:133, output treesize:22 [2021-06-05 04:33:26,748 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 04:33:26,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1619435067] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:26,749 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:33:26,749 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:33:26,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499847902] [2021-06-05 04:33:26,749 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:33:26,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:33:26,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:33:26,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:33:26,749 INFO L87 Difference]: Start difference. First operand 78 states and 157 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:26,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:33:26,996 INFO L93 Difference]: Finished difference Result 116 states and 214 transitions. [2021-06-05 04:33:26,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:33:26,997 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 04:33:26,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:33:26,997 INFO L225 Difference]: With dead ends: 116 [2021-06-05 04:33:26,997 INFO L226 Difference]: Without dead ends: 116 [2021-06-05 04:33:26,997 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 277.2ms TimeCoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:33:26,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-06-05 04:33:26,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 77. [2021-06-05 04:33:26,998 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 04:33:27,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 155 transitions. [2021-06-05 04:33:27,000 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 155 transitions. Word has length 17 [2021-06-05 04:33:27,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:33:27,000 INFO L482 AbstractCegarLoop]: Abstraction has 77 states and 155 transitions. [2021-06-05 04:33:27,000 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 04:33:27,000 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 155 transitions. [2021-06-05 04:33:27,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:33:27,000 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:33:27,000 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:33:27,204 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1162,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:33:27,205 INFO L430 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:33:27,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:33:27,205 INFO L82 PathProgramCache]: Analyzing trace with hash -1028748424, now seen corresponding path program 187 times [2021-06-05 04:33:27,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:33:27,205 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747119179] [2021-06-05 04:33:27,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:33:27,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:33:27,277 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 04:33:27,277 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:33:27,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747119179] [2021-06-05 04:33:27,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747119179] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:27,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109048736] [2021-06-05 04:33:27,277 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:33:27,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:33:27,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:33:27,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:33:27,434 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 04:33:27,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2109048736] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:27,434 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:33:27,434 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:33:27,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176008602] [2021-06-05 04:33:27,434 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:33:27,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:33:27,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:33:27,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:33:27,435 INFO L87 Difference]: Start difference. First operand 77 states and 155 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:27,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:33:27,837 INFO L93 Difference]: Finished difference Result 98 states and 183 transitions. [2021-06-05 04:33:27,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:33:27,837 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 04:33:27,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:33:27,838 INFO L225 Difference]: With dead ends: 98 [2021-06-05 04:33:27,838 INFO L226 Difference]: Without dead ends: 94 [2021-06-05 04:33:27,838 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 425.4ms TimeCoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:33:27,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-06-05 04:33:27,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 77. [2021-06-05 04:33:27,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 2.026315789473684) internal successors, (154), 76 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:27,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 154 transitions. [2021-06-05 04:33:27,839 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 154 transitions. Word has length 17 [2021-06-05 04:33:27,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:33:27,839 INFO L482 AbstractCegarLoop]: Abstraction has 77 states and 154 transitions. [2021-06-05 04:33:27,839 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 04:33:27,839 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 154 transitions. [2021-06-05 04:33:27,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:33:27,839 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:33:27,839 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:33:28,044 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1166 [2021-06-05 04:33:28,045 INFO L430 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:33:28,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:33:28,045 INFO L82 PathProgramCache]: Analyzing trace with hash -941867190, now seen corresponding path program 188 times [2021-06-05 04:33:28,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:33:28,045 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680348517] [2021-06-05 04:33:28,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:33:28,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:33:28,101 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 04:33:28,101 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:33:28,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680348517] [2021-06-05 04:33:28,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680348517] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:28,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487110977] [2021-06-05 04:33:28,101 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:33:28,127 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:33:28,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:33:28,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 04:33:28,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:33:28,237 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:28,237 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:28,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:33:28,238 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:28,240 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:28,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:33:28,241 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:28,259 INFO L628 ElimStorePlain]: treesize reduction 28, result has 42.9 percent of original size [2021-06-05 04:33:28,260 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:28,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-06-05 04:33:28,262 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:33:28,267 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:33:28,268 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:33:28,268 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:63, output treesize:9 [2021-06-05 04:33:28,285 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 04:33:28,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [487110977] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:28,285 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:33:28,285 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:33:28,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148538732] [2021-06-05 04:33:28,285 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:33:28,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:33:28,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:33:28,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:33:28,285 INFO L87 Difference]: Start difference. First operand 77 states and 154 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:28,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:33:28,435 INFO L93 Difference]: Finished difference Result 110 states and 208 transitions. [2021-06-05 04:33:28,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:33:28,435 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 04:33:28,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:33:28,435 INFO L225 Difference]: With dead ends: 110 [2021-06-05 04:33:28,435 INFO L226 Difference]: Without dead ends: 110 [2021-06-05 04:33:28,436 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 192.9ms TimeCoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:33:28,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-06-05 04:33:28,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 76. [2021-06-05 04:33:28,436 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 04:33:28,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 152 transitions. [2021-06-05 04:33:28,437 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 152 transitions. Word has length 17 [2021-06-05 04:33:28,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:33:28,437 INFO L482 AbstractCegarLoop]: Abstraction has 76 states and 152 transitions. [2021-06-05 04:33:28,437 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 04:33:28,437 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 152 transitions. [2021-06-05 04:33:28,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:33:28,437 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:33:28,437 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:33:28,637 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1172,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:33:28,637 INFO L430 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:33:28,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:33:28,638 INFO L82 PathProgramCache]: Analyzing trace with hash -1535094690, now seen corresponding path program 189 times [2021-06-05 04:33:28,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:33:28,638 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825813108] [2021-06-05 04:33:28,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:33:28,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:33:28,715 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:33:28,716 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:33:28,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825813108] [2021-06-05 04:33:28,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825813108] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:28,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414515649] [2021-06-05 04:33:28,718 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 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 04:33:28,744 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:33:28,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:33:28,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:33:28,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:33:28,861 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 04:33:28,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [414515649] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:28,861 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:33:28,861 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:33:28,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012954311] [2021-06-05 04:33:28,862 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:33:28,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:33:28,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:33:28,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:33:28,862 INFO L87 Difference]: Start difference. First operand 76 states and 152 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:29,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:33:29,264 INFO L93 Difference]: Finished difference Result 99 states and 183 transitions. [2021-06-05 04:33:29,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:33:29,265 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:33:29,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:33:29,265 INFO L225 Difference]: With dead ends: 99 [2021-06-05 04:33:29,265 INFO L226 Difference]: Without dead ends: 93 [2021-06-05 04:33:29,265 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 411.8ms TimeCoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:33:29,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-06-05 04:33:29,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 76. [2021-06-05 04:33:29,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 2.013333333333333) internal successors, (151), 75 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:29,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 151 transitions. [2021-06-05 04:33:29,267 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 151 transitions. Word has length 17 [2021-06-05 04:33:29,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:33:29,267 INFO L482 AbstractCegarLoop]: Abstraction has 76 states and 151 transitions. [2021-06-05 04:33:29,267 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:29,267 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 151 transitions. [2021-06-05 04:33:29,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:33:29,267 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:33:29,267 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:33:29,480 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1174 [2021-06-05 04:33:29,481 INFO L430 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:33:29,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:33:29,481 INFO L82 PathProgramCache]: Analyzing trace with hash 1246315986, now seen corresponding path program 190 times [2021-06-05 04:33:29,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:33:29,481 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794238155] [2021-06-05 04:33:29,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:33:29,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:33:29,534 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 04:33:29,534 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:33:29,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794238155] [2021-06-05 04:33:29,535 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794238155] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:29,535 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [189906694] [2021-06-05 04:33:29,535 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 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 04:33:29,557 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:33:29,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:33:29,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:33:29,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:33:29,661 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 04:33:29,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [189906694] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:29,661 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:33:29,661 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:33:29,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139916559] [2021-06-05 04:33:29,661 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:33:29,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:33:29,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:33:29,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:33:29,662 INFO L87 Difference]: Start difference. First operand 76 states and 151 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:29,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:33:29,815 INFO L93 Difference]: Finished difference Result 119 states and 226 transitions. [2021-06-05 04:33:29,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:33:29,815 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 04:33:29,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:33:29,816 INFO L225 Difference]: With dead ends: 119 [2021-06-05 04:33:29,816 INFO L226 Difference]: Without dead ends: 119 [2021-06-05 04:33:29,816 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 163.8ms TimeCoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:33:29,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-06-05 04:33:29,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 75. [2021-06-05 04:33:29,816 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 04:33:29,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 149 transitions. [2021-06-05 04:33:29,817 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 149 transitions. Word has length 17 [2021-06-05 04:33:29,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:33:29,817 INFO L482 AbstractCegarLoop]: Abstraction has 75 states and 149 transitions. [2021-06-05 04:33:29,817 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 04:33:29,817 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 149 transitions. [2021-06-05 04:33:29,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:33:29,817 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:33:29,817 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:33:30,017 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 191 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1179 [2021-06-05 04:33:30,018 INFO L430 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:33:30,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:33:30,018 INFO L82 PathProgramCache]: Analyzing trace with hash -494858892, now seen corresponding path program 191 times [2021-06-05 04:33:30,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:33:30,018 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324797470] [2021-06-05 04:33:30,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:33:30,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:33:30,091 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 04:33:30,092 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:33:30,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324797470] [2021-06-05 04:33:30,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324797470] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:30,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645806799] [2021-06-05 04:33:30,092 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 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 04:33:30,133 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:33:30,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:33:30,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:33:30,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:33:30,214 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 04:33:30,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1645806799] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:30,215 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:33:30,215 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 04:33:30,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226532318] [2021-06-05 04:33:30,215 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:33:30,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:33:30,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:33:30,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:33:30,215 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 04:33:30,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:33:30,462 INFO L93 Difference]: Finished difference Result 81 states and 156 transitions. [2021-06-05 04:33:30,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:33:30,462 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 04:33:30,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:33:30,462 INFO L225 Difference]: With dead ends: 81 [2021-06-05 04:33:30,462 INFO L226 Difference]: Without dead ends: 73 [2021-06-05 04:33:30,462 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 293.0ms TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:33:30,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-06-05 04:33:30,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2021-06-05 04:33:30,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 2.013888888888889) internal successors, (145), 72 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:30,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 145 transitions. [2021-06-05 04:33:30,463 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 145 transitions. Word has length 17 [2021-06-05 04:33:30,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:33:30,463 INFO L482 AbstractCegarLoop]: Abstraction has 73 states and 145 transitions. [2021-06-05 04:33:30,463 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 04:33:30,463 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 145 transitions. [2021-06-05 04:33:30,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:33:30,464 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:33:30,464 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:33:30,664 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1183,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:33:30,664 INFO L430 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:33:30,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:33:30,664 INFO L82 PathProgramCache]: Analyzing trace with hash -82381434, now seen corresponding path program 192 times [2021-06-05 04:33:30,664 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:33:30,665 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219197322] [2021-06-05 04:33:30,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:33:30,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:33:30,724 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 04:33:30,724 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:33:30,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219197322] [2021-06-05 04:33:30,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219197322] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:30,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008052764] [2021-06-05 04:33:30,724 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 04:33:30,754 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:33:30,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:33:30,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:33:30,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:33:30,847 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 04:33:30,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2008052764] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:30,847 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:33:30,847 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 04:33:30,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894928782] [2021-06-05 04:33:30,847 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:33:30,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:33:30,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:33:30,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:33:30,848 INFO L87 Difference]: Start difference. First operand 73 states and 145 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:30,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:33:30,964 INFO L93 Difference]: Finished difference Result 85 states and 166 transitions. [2021-06-05 04:33:30,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:33:30,965 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 04:33:30,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:33:30,965 INFO L225 Difference]: With dead ends: 85 [2021-06-05 04:33:30,965 INFO L226 Difference]: Without dead ends: 85 [2021-06-05 04:33:30,965 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 96.6ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:33:30,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-06-05 04:33:30,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 67. [2021-06-05 04:33:30,968 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 04:33:30,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 130 transitions. [2021-06-05 04:33:30,968 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 130 transitions. Word has length 17 [2021-06-05 04:33:30,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:33:30,968 INFO L482 AbstractCegarLoop]: Abstraction has 67 states and 130 transitions. [2021-06-05 04:33:30,968 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 04:33:30,968 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 130 transitions. [2021-06-05 04:33:30,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:33:30,968 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:33:30,968 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:33:31,169 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1187 [2021-06-05 04:33:31,169 INFO L430 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:33:31,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:33:31,169 INFO L82 PathProgramCache]: Analyzing trace with hash 413516902, now seen corresponding path program 193 times [2021-06-05 04:33:31,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:33:31,169 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204201926] [2021-06-05 04:33:31,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:33:31,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:33:31,334 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:33:31,334 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:33:31,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204201926] [2021-06-05 04:33:31,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204201926] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:31,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94272813] [2021-06-05 04:33:31,334 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:33:31,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:33:31,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 04:33:31,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:33:31,506 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:31,506 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:31,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:33:31,507 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:31,509 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:31,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:33:31,510 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:31,531 INFO L628 ElimStorePlain]: treesize reduction 37, result has 40.3 percent of original size [2021-06-05 04:33:31,533 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:31,533 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 10 treesize of output 6 [2021-06-05 04:33:31,534 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:33:31,541 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:33:31,541 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:33:31,541 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:75, output treesize:14 [2021-06-05 04:33:31,579 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 04:33:31,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [94272813] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:31,579 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:33:31,579 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-06-05 04:33:31,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064728979] [2021-06-05 04:33:31,579 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:33:31,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:33:31,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:33:31,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:33:31,580 INFO L87 Difference]: Start difference. First operand 67 states and 130 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:31,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:33:31,806 INFO L93 Difference]: Finished difference Result 120 states and 223 transitions. [2021-06-05 04:33:31,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:33:31,807 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 04:33:31,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:33:31,807 INFO L225 Difference]: With dead ends: 120 [2021-06-05 04:33:31,807 INFO L226 Difference]: Without dead ends: 96 [2021-06-05 04:33:31,807 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 400.8ms TimeCoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:33:31,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-06-05 04:33:31,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 69. [2021-06-05 04:33:31,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.9705882352941178) internal successors, (134), 68 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:31,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 134 transitions. [2021-06-05 04:33:31,808 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 134 transitions. Word has length 18 [2021-06-05 04:33:31,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:33:31,808 INFO L482 AbstractCegarLoop]: Abstraction has 69 states and 134 transitions. [2021-06-05 04:33:31,808 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 04:33:31,808 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 134 transitions. [2021-06-05 04:33:31,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:33:31,808 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:33:31,808 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:33:32,009 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1190,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:33:32,009 INFO L430 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:33:32,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:33:32,009 INFO L82 PathProgramCache]: Analyzing trace with hash 293588210, now seen corresponding path program 194 times [2021-06-05 04:33:32,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:33:32,009 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579503352] [2021-06-05 04:33:32,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:33:32,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:33:32,162 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:33:32,162 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:33:32,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579503352] [2021-06-05 04:33:32,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579503352] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:32,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088722433] [2021-06-05 04:33:32,162 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:33:32,186 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:33:32,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:33:32,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:33:32,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:33:32,350 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:32,351 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 27 treesize of output 21 [2021-06-05 04:33:32,351 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:32,358 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:33:32,359 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:32,359 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 21 treesize of output 13 [2021-06-05 04:33:32,360 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:32,365 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:33:32,366 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 04:33:32,366 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:36, output treesize:13 [2021-06-05 04:33:32,401 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:33:32,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2088722433] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:32,401 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:33:32,401 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-06-05 04:33:32,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427844328] [2021-06-05 04:33:32,401 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:33:32,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:33:32,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:33:32,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:33:32,402 INFO L87 Difference]: Start difference. First operand 69 states and 134 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:32,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:33:32,690 INFO L93 Difference]: Finished difference Result 116 states and 219 transitions. [2021-06-05 04:33:32,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:33:32,690 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 04:33:32,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:33:32,690 INFO L225 Difference]: With dead ends: 116 [2021-06-05 04:33:32,690 INFO L226 Difference]: Without dead ends: 109 [2021-06-05 04:33:32,691 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 383.4ms TimeCoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:33:32,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-06-05 04:33:32,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 73. [2021-06-05 04:33:32,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.9722222222222223) internal successors, (142), 72 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:32,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 142 transitions. [2021-06-05 04:33:32,692 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 142 transitions. Word has length 18 [2021-06-05 04:33:32,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:33:32,692 INFO L482 AbstractCegarLoop]: Abstraction has 73 states and 142 transitions. [2021-06-05 04:33:32,692 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 04:33:32,692 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 142 transitions. [2021-06-05 04:33:32,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:33:32,692 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:33:32,692 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:33:32,892 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1193 [2021-06-05 04:33:32,892 INFO L430 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:33:32,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:33:32,893 INFO L82 PathProgramCache]: Analyzing trace with hash 1245941418, now seen corresponding path program 195 times [2021-06-05 04:33:32,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:33:32,893 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849230513] [2021-06-05 04:33:32,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:33:32,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:33:33,052 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:33:33,052 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:33:33,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849230513] [2021-06-05 04:33:33,052 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849230513] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:33,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173866851] [2021-06-05 04:33:33,052 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:33:33,077 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:33:33,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:33:33,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 04:33:33,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:33:33,289 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:33,289 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:33,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:33:33,290 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:33,293 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:33,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:33:33,294 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:33,320 INFO L628 ElimStorePlain]: treesize reduction 34, result has 42.4 percent of original size [2021-06-05 04:33:33,322 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:33,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:33:33,324 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:33:33,332 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:33:33,334 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 04:33:33,334 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:75, output treesize:14 [2021-06-05 04:33:33,387 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:33:33,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [173866851] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:33,388 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:33:33,388 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-06-05 04:33:33,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859610740] [2021-06-05 04:33:33,388 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:33:33,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:33:33,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:33:33,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:33:33,389 INFO L87 Difference]: Start difference. First operand 73 states and 142 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:33,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:33:33,675 INFO L93 Difference]: Finished difference Result 120 states and 224 transitions. [2021-06-05 04:33:33,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:33:33,675 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 04:33:33,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:33:33,676 INFO L225 Difference]: With dead ends: 120 [2021-06-05 04:33:33,676 INFO L226 Difference]: Without dead ends: 104 [2021-06-05 04:33:33,676 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 434.3ms TimeCoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:33:33,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-06-05 04:33:33,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 74. [2021-06-05 04:33:33,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 1.9726027397260273) internal successors, (144), 73 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:33,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 144 transitions. [2021-06-05 04:33:33,677 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 144 transitions. Word has length 18 [2021-06-05 04:33:33,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:33:33,677 INFO L482 AbstractCegarLoop]: Abstraction has 74 states and 144 transitions. [2021-06-05 04:33:33,677 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 04:33:33,677 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 144 transitions. [2021-06-05 04:33:33,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:33:33,677 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:33:33,677 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:33:33,877 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1196,196 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:33:33,878 INFO L430 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:33:33,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:33:33,878 INFO L82 PathProgramCache]: Analyzing trace with hash 2107946482, now seen corresponding path program 196 times [2021-06-05 04:33:33,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:33:33,878 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881373573] [2021-06-05 04:33:33,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:33:33,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:33:34,051 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:33:34,051 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:33:34,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881373573] [2021-06-05 04:33:34,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881373573] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:34,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938371407] [2021-06-05 04:33:34,051 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:33:34,075 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:33:34,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:33:34,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 04:33:34,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:33:34,285 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:34,285 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:34,285 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 27 treesize of output 21 [2021-06-05 04:33:34,286 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:34,288 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:34,288 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 27 treesize of output 21 [2021-06-05 04:33:34,289 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:34,310 INFO L628 ElimStorePlain]: treesize reduction 40, result has 38.5 percent of original size [2021-06-05 04:33:34,312 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:34,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:33:34,313 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:33:34,320 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:33:34,321 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 04:33:34,321 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:83, output treesize:14 [2021-06-05 04:33:34,361 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:33:34,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1938371407] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:34,361 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:33:34,361 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-06-05 04:33:34,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141013884] [2021-06-05 04:33:34,361 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:33:34,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:33:34,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:33:34,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:33:34,362 INFO L87 Difference]: Start difference. First operand 74 states and 144 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:34,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:33:34,715 INFO L93 Difference]: Finished difference Result 140 states and 263 transitions. [2021-06-05 04:33:34,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:33:34,715 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 04:33:34,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:33:34,716 INFO L225 Difference]: With dead ends: 140 [2021-06-05 04:33:34,716 INFO L226 Difference]: Without dead ends: 118 [2021-06-05 04:33:34,716 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 501.6ms TimeCoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:33:34,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-06-05 04:33:34,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 76. [2021-06-05 04:33:34,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 1.9866666666666666) internal successors, (149), 75 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:34,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 149 transitions. [2021-06-05 04:33:34,717 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 149 transitions. Word has length 18 [2021-06-05 04:33:34,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:33:34,717 INFO L482 AbstractCegarLoop]: Abstraction has 76 states and 149 transitions. [2021-06-05 04:33:34,717 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 04:33:34,717 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 149 transitions. [2021-06-05 04:33:34,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:33:34,717 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:33:34,717 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:33:34,917 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1199 [2021-06-05 04:33:34,917 INFO L430 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:33:34,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:33:34,918 INFO L82 PathProgramCache]: Analyzing trace with hash -551383242, now seen corresponding path program 197 times [2021-06-05 04:33:34,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:33:34,918 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819065672] [2021-06-05 04:33:34,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:33:34,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:33:35,094 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:33:35,094 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:33:35,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819065672] [2021-06-05 04:33:35,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819065672] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:35,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060416634] [2021-06-05 04:33:35,094 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:33:35,118 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:33:35,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:33:35,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 04:33:35,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:33:35,260 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:35,260 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:35,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:33:35,261 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:35,263 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:35,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:33:35,264 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:35,286 INFO L628 ElimStorePlain]: treesize reduction 37, result has 43.1 percent of original size [2021-06-05 04:33:35,287 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:35,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 04:33:35,289 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:33:35,295 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:33:35,296 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 04:33:35,296 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:75, output treesize:14 [2021-06-05 04:33:35,333 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:33:35,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2060416634] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:35,333 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:33:35,333 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-06-05 04:33:35,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987518091] [2021-06-05 04:33:35,333 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:33:35,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:33:35,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:33:35,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:33:35,333 INFO L87 Difference]: Start difference. First operand 76 states and 149 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:35,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:33:35,507 INFO L93 Difference]: Finished difference Result 97 states and 182 transitions. [2021-06-05 04:33:35,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:33:35,507 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 04:33:35,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:33:35,507 INFO L225 Difference]: With dead ends: 97 [2021-06-05 04:33:35,507 INFO L226 Difference]: Without dead ends: 78 [2021-06-05 04:33:35,507 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 302.1ms TimeCoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:33:35,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-06-05 04:33:35,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2021-06-05 04:33:35,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 1.9870129870129871) internal successors, (153), 77 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:35,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 153 transitions. [2021-06-05 04:33:35,508 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 153 transitions. Word has length 18 [2021-06-05 04:33:35,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:33:35,508 INFO L482 AbstractCegarLoop]: Abstraction has 78 states and 153 transitions. [2021-06-05 04:33:35,508 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 04:33:35,508 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 153 transitions. [2021-06-05 04:33:35,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:33:35,509 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:33:35,509 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:33:35,709 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1203 [2021-06-05 04:33:35,709 INFO L430 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:33:35,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:33:35,709 INFO L82 PathProgramCache]: Analyzing trace with hash 400969966, now seen corresponding path program 198 times [2021-06-05 04:33:35,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:33:35,709 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997069124] [2021-06-05 04:33:35,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:33:35,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:33:35,866 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 04:33:35,866 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:33:35,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997069124] [2021-06-05 04:33:35,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997069124] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:35,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687821944] [2021-06-05 04:33:35,866 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 04:33:35,891 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:33:35,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:33:35,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:33:35,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:33:36,053 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:36,054 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 27 treesize of output 21 [2021-06-05 04:33:36,055 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:36,060 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:33:36,062 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:36,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:33:36,063 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:33:36,069 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:33:36,069 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 04:33:36,070 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:36, output treesize:13 [2021-06-05 04:33:36,107 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:33:36,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1687821944] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:36,107 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:33:36,107 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-06-05 04:33:36,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126741519] [2021-06-05 04:33:36,107 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:33:36,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:33:36,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:33:36,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:33:36,108 INFO L87 Difference]: Start difference. First operand 78 states and 153 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:36,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:33:36,330 INFO L93 Difference]: Finished difference Result 95 states and 182 transitions. [2021-06-05 04:33:36,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:33:36,330 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 04:33:36,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:33:36,331 INFO L225 Difference]: With dead ends: 95 [2021-06-05 04:33:36,331 INFO L226 Difference]: Without dead ends: 88 [2021-06-05 04:33:36,331 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 310.4ms TimeCoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:33:36,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-06-05 04:33:36,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 79. [2021-06-05 04:33:36,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 2.0) internal successors, (156), 78 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:36,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 156 transitions. [2021-06-05 04:33:36,332 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 156 transitions. Word has length 18 [2021-06-05 04:33:36,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:33:36,332 INFO L482 AbstractCegarLoop]: Abstraction has 79 states and 156 transitions. [2021-06-05 04:33:36,332 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 04:33:36,332 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 156 transitions. [2021-06-05 04:33:36,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:33:36,332 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:33:36,332 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:33:36,532 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1206,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:33:36,532 INFO L430 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:33:36,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:33:36,533 INFO L82 PathProgramCache]: Analyzing trace with hash 1262975030, now seen corresponding path program 199 times [2021-06-05 04:33:36,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:33:36,533 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218636573] [2021-06-05 04:33:36,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:33:36,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:33:36,727 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 04:33:36,727 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:33:36,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218636573] [2021-06-05 04:33:36,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218636573] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:36,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125444418] [2021-06-05 04:33:36,727 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:33:36,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:33:36,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 04:33:36,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:33:36,941 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:36,941 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:36,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 04:33:36,942 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:36,944 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:36,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 04:33:36,945 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:36,967 INFO L628 ElimStorePlain]: treesize reduction 34, result has 47.7 percent of original size [2021-06-05 04:33:36,968 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:36,969 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 21 treesize of output 13 [2021-06-05 04:33:36,969 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:36,976 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:33:36,977 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 04:33:36,977 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:83, output treesize:14 [2021-06-05 04:33:37,018 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:33:37,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [125444418] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:37,019 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:33:37,019 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-06-05 04:33:37,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567848986] [2021-06-05 04:33:37,019 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:33:37,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:33:37,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:33:37,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:33:37,019 INFO L87 Difference]: Start difference. First operand 79 states and 156 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:37,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:33:37,343 INFO L93 Difference]: Finished difference Result 105 states and 201 transitions. [2021-06-05 04:33:37,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:33:37,343 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 04:33:37,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:33:37,344 INFO L225 Difference]: With dead ends: 105 [2021-06-05 04:33:37,344 INFO L226 Difference]: Without dead ends: 92 [2021-06-05 04:33:37,344 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 407.3ms TimeCoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:33:37,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-06-05 04:33:37,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 80. [2021-06-05 04:33:37,345 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 04:33:37,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 158 transitions. [2021-06-05 04:33:37,345 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 158 transitions. Word has length 18 [2021-06-05 04:33:37,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:33:37,345 INFO L482 AbstractCegarLoop]: Abstraction has 80 states and 158 transitions. [2021-06-05 04:33:37,345 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 04:33:37,345 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 158 transitions. [2021-06-05 04:33:37,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:33:37,346 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:33:37,346 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:33:37,546 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1210 [2021-06-05 04:33:37,546 INFO L430 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:33:37,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:33:37,546 INFO L82 PathProgramCache]: Analyzing trace with hash -1895806994, now seen corresponding path program 200 times [2021-06-05 04:33:37,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:33:37,547 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798722641] [2021-06-05 04:33:37,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:33:37,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:33:37,790 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:33:37,791 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:33:37,791 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798722641] [2021-06-05 04:33:37,791 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798722641] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:37,791 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986530864] [2021-06-05 04:33:37,791 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:33:37,824 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:33:37,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:33:37,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:33:37,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:33:38,029 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:38,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:33:38,030 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:38,058 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:33:38,061 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:38,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:33:38,063 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:33:38,088 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:33:38,091 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:38,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:33:38,093 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:38,116 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:33:38,119 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:38,119 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 13 treesize of output 9 [2021-06-05 04:33:38,121 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:33:38,143 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:33:38,144 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 04:33:38,144 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:77, output treesize:35 [2021-06-05 04:33:38,236 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:33:38,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1986530864] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:38,236 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:33:38,236 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-06-05 04:33:38,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752057878] [2021-06-05 04:33:38,236 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:33:38,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:33:38,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:33:38,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:33:38,237 INFO L87 Difference]: Start difference. First operand 80 states and 158 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:38,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:33:38,635 INFO L93 Difference]: Finished difference Result 105 states and 205 transitions. [2021-06-05 04:33:38,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:33:38,635 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 04:33:38,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:33:38,636 INFO L225 Difference]: With dead ends: 105 [2021-06-05 04:33:38,636 INFO L226 Difference]: Without dead ends: 96 [2021-06-05 04:33:38,636 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 570.0ms TimeCoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:33:38,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-06-05 04:33:38,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 79. [2021-06-05 04:33:38,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 2.0) internal successors, (156), 78 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:38,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 156 transitions. [2021-06-05 04:33:38,637 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 156 transitions. Word has length 18 [2021-06-05 04:33:38,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:33:38,637 INFO L482 AbstractCegarLoop]: Abstraction has 79 states and 156 transitions. [2021-06-05 04:33:38,637 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 04:33:38,637 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 156 transitions. [2021-06-05 04:33:38,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:33:38,637 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:33:38,637 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:33:38,838 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1214,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:33:38,838 INFO L430 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:33:38,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:33:38,838 INFO L82 PathProgramCache]: Analyzing trace with hash -484828314, now seen corresponding path program 201 times [2021-06-05 04:33:38,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:33:38,838 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887477904] [2021-06-05 04:33:38,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:33:38,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:33:38,984 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:33:38,985 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:33:38,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887477904] [2021-06-05 04:33:38,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887477904] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:38,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194625688] [2021-06-05 04:33:38,985 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:33:39,009 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:33:39,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:33:39,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 04:33:39,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:33:39,149 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:39,149 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:39,150 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 19 treesize of output 15 [2021-06-05 04:33:39,150 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:39,152 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:39,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:33:39,153 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:39,174 INFO L628 ElimStorePlain]: treesize reduction 34, result has 45.2 percent of original size [2021-06-05 04:33:39,176 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:39,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 04:33:39,177 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:33:39,184 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:33:39,185 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 04:33:39,185 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:75, output treesize:14 [2021-06-05 04:33:39,223 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:33:39,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [194625688] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:39,223 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:33:39,223 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-06-05 04:33:39,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2720670] [2021-06-05 04:33:39,223 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:33:39,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:33:39,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:33:39,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:33:39,223 INFO L87 Difference]: Start difference. First operand 79 states and 156 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:39,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:33:39,426 INFO L93 Difference]: Finished difference Result 99 states and 188 transitions. [2021-06-05 04:33:39,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:33:39,427 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 04:33:39,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:33:39,427 INFO L225 Difference]: With dead ends: 99 [2021-06-05 04:33:39,427 INFO L226 Difference]: Without dead ends: 83 [2021-06-05 04:33:39,427 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 319.6ms TimeCoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:33:39,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-06-05 04:33:39,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2021-06-05 04:33:39,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 2.0) internal successors, (164), 82 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:39,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 164 transitions. [2021-06-05 04:33:39,428 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 164 transitions. Word has length 18 [2021-06-05 04:33:39,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:33:39,428 INFO L482 AbstractCegarLoop]: Abstraction has 83 states and 164 transitions. [2021-06-05 04:33:39,428 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 04:33:39,428 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 164 transitions. [2021-06-05 04:33:39,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:33:39,428 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:33:39,428 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:33:39,628 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1219,202 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:33:39,629 INFO L430 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:33:39,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:33:39,629 INFO L82 PathProgramCache]: Analyzing trace with hash 377176750, now seen corresponding path program 202 times [2021-06-05 04:33:39,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:33:39,629 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947152990] [2021-06-05 04:33:39,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:33:39,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:33:39,812 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:33:39,812 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:33:39,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947152990] [2021-06-05 04:33:39,812 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947152990] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:39,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503701263] [2021-06-05 04:33:39,812 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:33:39,836 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:33:39,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:33:39,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 04:33:39,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:33:39,992 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:39,993 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:39,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:33:39,994 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:39,996 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:39,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:33:39,997 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:40,023 INFO L628 ElimStorePlain]: treesize reduction 37, result has 40.3 percent of original size [2021-06-05 04:33:40,025 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:40,025 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 10 treesize of output 6 [2021-06-05 04:33:40,026 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:33:40,033 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:33:40,034 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 04:33:40,034 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:75, output treesize:14 [2021-06-05 04:33:40,068 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:33:40,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [503701263] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:40,069 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:33:40,069 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-06-05 04:33:40,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664564082] [2021-06-05 04:33:40,069 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:33:40,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:33:40,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:33:40,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:33:40,069 INFO L87 Difference]: Start difference. First operand 83 states and 164 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:40,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:33:40,432 INFO L93 Difference]: Finished difference Result 101 states and 196 transitions. [2021-06-05 04:33:40,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:33:40,432 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:33:40,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:33:40,432 INFO L225 Difference]: With dead ends: 101 [2021-06-05 04:33:40,432 INFO L226 Difference]: Without dead ends: 88 [2021-06-05 04:33:40,432 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 413.8ms TimeCoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:33:40,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-06-05 04:33:40,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 84. [2021-06-05 04:33:40,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 2.0) internal successors, (166), 83 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:40,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 166 transitions. [2021-06-05 04:33:40,433 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 166 transitions. Word has length 18 [2021-06-05 04:33:40,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:33:40,433 INFO L482 AbstractCegarLoop]: Abstraction has 84 states and 166 transitions. [2021-06-05 04:33:40,433 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 04:33:40,433 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 166 transitions. [2021-06-05 04:33:40,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:33:40,434 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:33:40,434 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:33:40,634 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1223,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:33:40,634 INFO L430 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:33:40,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:33:40,634 INFO L82 PathProgramCache]: Analyzing trace with hash 1513362022, now seen corresponding path program 203 times [2021-06-05 04:33:40,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:33:40,634 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836954346] [2021-06-05 04:33:40,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:33:40,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:33:40,819 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:33:40,819 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:33:40,819 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836954346] [2021-06-05 04:33:40,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836954346] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:40,819 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288078955] [2021-06-05 04:33:40,819 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:33:40,843 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:33:40,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:33:40,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 04:33:40,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:33:41,015 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:41,016 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:41,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:33:41,017 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:41,021 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:41,025 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 19 treesize of output 15 [2021-06-05 04:33:41,026 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:41,108 INFO L628 ElimStorePlain]: treesize reduction 85, result has 46.9 percent of original size [2021-06-05 04:33:41,112 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:41,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 04:33:41,114 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:33:41,143 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:33:41,146 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:41,147 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 19 treesize of output 15 [2021-06-05 04:33:41,147 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:41,175 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:33:41,177 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:41,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 04:33:41,179 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:33:41,199 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:33:41,200 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 04:33:41,200 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-06-05 04:33:41,276 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:33:41,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [288078955] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:41,277 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:33:41,277 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-06-05 04:33:41,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060693925] [2021-06-05 04:33:41,277 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:33:41,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:33:41,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:33:41,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:33:41,277 INFO L87 Difference]: Start difference. First operand 84 states and 166 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:41,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:33:41,755 INFO L93 Difference]: Finished difference Result 121 states and 225 transitions. [2021-06-05 04:33:41,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:33:41,756 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 04:33:41,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:33:41,756 INFO L225 Difference]: With dead ends: 121 [2021-06-05 04:33:41,756 INFO L226 Difference]: Without dead ends: 102 [2021-06-05 04:33:41,756 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 573.9ms TimeCoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:33:41,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-06-05 04:33:41,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 86. [2021-06-05 04:33:41,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 2.023529411764706) internal successors, (172), 85 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:41,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 172 transitions. [2021-06-05 04:33:41,757 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 172 transitions. Word has length 18 [2021-06-05 04:33:41,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:33:41,757 INFO L482 AbstractCegarLoop]: Abstraction has 86 states and 172 transitions. [2021-06-05 04:33:41,757 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 04:33:41,757 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 172 transitions. [2021-06-05 04:33:41,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:33:41,757 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:33:41,757 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:33:41,958 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1227 [2021-06-05 04:33:41,958 INFO L430 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:33:41,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:33:41,958 INFO L82 PathProgramCache]: Analyzing trace with hash -1729607370, now seen corresponding path program 204 times [2021-06-05 04:33:41,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:33:41,958 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351262010] [2021-06-05 04:33:41,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:33:41,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:33:42,102 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:33:42,102 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:33:42,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351262010] [2021-06-05 04:33:42,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351262010] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:42,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748768412] [2021-06-05 04:33:42,102 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 04:33:42,126 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:33:42,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:33:42,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 04:33:42,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:33:42,276 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:42,277 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:42,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:33:42,278 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:42,279 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:42,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:33:42,280 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:42,302 INFO L628 ElimStorePlain]: treesize reduction 37, result has 43.1 percent of original size [2021-06-05 04:33:42,304 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:42,304 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 13 treesize of output 9 [2021-06-05 04:33:42,305 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:33:42,312 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:33:42,313 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 04:33:42,313 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:75, output treesize:14 [2021-06-05 04:33:42,350 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 04:33:42,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1748768412] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:42,350 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:33:42,350 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-06-05 04:33:42,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515574127] [2021-06-05 04:33:42,350 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:33:42,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:33:42,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:33:42,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:33:42,351 INFO L87 Difference]: Start difference. First operand 86 states and 172 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:42,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:33:42,728 INFO L93 Difference]: Finished difference Result 110 states and 216 transitions. [2021-06-05 04:33:42,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:33:42,728 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 04:33:42,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:33:42,728 INFO L225 Difference]: With dead ends: 110 [2021-06-05 04:33:42,728 INFO L226 Difference]: Without dead ends: 97 [2021-06-05 04:33:42,729 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 404.8ms TimeCoverageRelationStatistics Valid=82, Invalid=568, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:33:42,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-06-05 04:33:42,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 93. [2021-06-05 04:33:42,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 2.0217391304347827) internal successors, (186), 92 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:42,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 186 transitions. [2021-06-05 04:33:42,729 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 186 transitions. Word has length 18 [2021-06-05 04:33:42,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:33:42,730 INFO L482 AbstractCegarLoop]: Abstraction has 93 states and 186 transitions. [2021-06-05 04:33:42,730 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 04:33:42,730 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 186 transitions. [2021-06-05 04:33:42,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:33:42,730 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:33:42,730 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:33:42,930 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1232,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:33:42,930 INFO L430 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:33:42,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:33:42,931 INFO L82 PathProgramCache]: Analyzing trace with hash -593422098, now seen corresponding path program 205 times [2021-06-05 04:33:42,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:33:42,931 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541641244] [2021-06-05 04:33:42,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:33:42,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:33:43,122 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:33:43,122 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:33:43,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541641244] [2021-06-05 04:33:43,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541641244] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:43,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964841045] [2021-06-05 04:33:43,122 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:33:43,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:33:43,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 04:33:43,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:33:43,244 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:43,245 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:43,245 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 19 treesize of output 15 [2021-06-05 04:33:43,246 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:43,249 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:43,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:33:43,249 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:43,311 INFO L628 ElimStorePlain]: treesize reduction 85, result has 45.9 percent of original size [2021-06-05 04:33:43,313 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:43,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:33:43,315 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:33:43,338 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:33:43,340 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:43,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:33:43,341 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:43,363 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:33:43,366 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:43,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:33:43,367 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:33:43,388 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:33:43,389 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 04:33:43,389 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-06-05 04:33:43,464 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:33:43,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [964841045] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:43,465 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:33:43,465 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-06-05 04:33:43,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507039894] [2021-06-05 04:33:43,465 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:33:43,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:33:43,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:33:43,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:33:43,465 INFO L87 Difference]: Start difference. First operand 93 states and 186 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:44,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:33:44,015 INFO L93 Difference]: Finished difference Result 131 states and 247 transitions. [2021-06-05 04:33:44,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 04:33:44,016 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 04:33:44,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:33:44,016 INFO L225 Difference]: With dead ends: 131 [2021-06-05 04:33:44,016 INFO L226 Difference]: Without dead ends: 112 [2021-06-05 04:33:44,016 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 606.6ms TimeCoverageRelationStatistics Valid=105, Invalid=707, Unknown=0, NotChecked=0, Total=812 [2021-06-05 04:33:44,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-06-05 04:33:44,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 92. [2021-06-05 04:33:44,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 2.021978021978022) internal successors, (184), 91 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:44,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 184 transitions. [2021-06-05 04:33:44,017 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 184 transitions. Word has length 18 [2021-06-05 04:33:44,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:33:44,017 INFO L482 AbstractCegarLoop]: Abstraction has 92 states and 184 transitions. [2021-06-05 04:33:44,017 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 04:33:44,017 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 184 transitions. [2021-06-05 04:33:44,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:33:44,018 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:33:44,018 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:33:44,218 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 206 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1235 [2021-06-05 04:33:44,218 INFO L430 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:33:44,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:33:44,218 INFO L82 PathProgramCache]: Analyzing trace with hash 1555374438, now seen corresponding path program 206 times [2021-06-05 04:33:44,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:33:44,218 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042718981] [2021-06-05 04:33:44,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:33:44,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:33:44,438 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 04:33:44,439 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:33:44,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042718981] [2021-06-05 04:33:44,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042718981] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:44,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237553983] [2021-06-05 04:33:44,439 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:33:44,469 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:33:44,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:33:44,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:33:44,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:33:44,563 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:44,564 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:44,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:33:44,565 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:44,568 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:44,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:33:44,570 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:44,598 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:33:44,601 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:44,602 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:44,602 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 13 treesize of output 9 [2021-06-05 04:33:44,604 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:33:44,606 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:44,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 04:33:44,608 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:33:44,634 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:33:44,635 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 04:33:44,635 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:35 [2021-06-05 04:33:44,706 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:33:44,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1237553983] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:44,706 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:33:44,706 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-06-05 04:33:44,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793976582] [2021-06-05 04:33:44,706 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:33:44,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:33:44,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:33:44,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:33:44,708 INFO L87 Difference]: Start difference. First operand 92 states and 184 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:45,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:33:45,512 INFO L93 Difference]: Finished difference Result 160 states and 305 transitions. [2021-06-05 04:33:45,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 04:33:45,513 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 04:33:45,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:33:45,513 INFO L225 Difference]: With dead ends: 160 [2021-06-05 04:33:45,513 INFO L226 Difference]: Without dead ends: 137 [2021-06-05 04:33:45,513 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 856.0ms TimeCoverageRelationStatistics Valid=126, Invalid=930, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 04:33:45,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-06-05 04:33:45,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 95. [2021-06-05 04:33:45,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 2.0638297872340425) internal successors, (194), 94 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:45,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 194 transitions. [2021-06-05 04:33:45,515 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 194 transitions. Word has length 18 [2021-06-05 04:33:45,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:33:45,515 INFO L482 AbstractCegarLoop]: Abstraction has 95 states and 194 transitions. [2021-06-05 04:33:45,515 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 04:33:45,515 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 194 transitions. [2021-06-05 04:33:45,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:33:45,515 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:33:45,515 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:33:45,720 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1240,207 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:33:45,721 INFO L430 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:33:45,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:33:45,721 INFO L82 PathProgramCache]: Analyzing trace with hash -975694478, now seen corresponding path program 207 times [2021-06-05 04:33:45,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:33:45,721 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787906288] [2021-06-05 04:33:45,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:33:45,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:33:45,881 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:33:45,881 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:33:45,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787906288] [2021-06-05 04:33:45,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787906288] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:45,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109400163] [2021-06-05 04:33:45,881 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:33:45,905 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:33:45,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:33:45,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 04:33:45,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:33:46,062 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:46,063 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:46,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:33:46,064 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:46,066 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:46,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:33:46,067 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:46,087 INFO L628 ElimStorePlain]: treesize reduction 34, result has 45.2 percent of original size [2021-06-05 04:33:46,101 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:46,102 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 13 treesize of output 9 [2021-06-05 04:33:46,103 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:33:46,112 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:33:46,113 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:33:46,113 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:75, output treesize:14 [2021-06-05 04:33:46,151 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 04:33:46,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1109400163] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:46,151 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:33:46,151 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-06-05 04:33:46,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165828654] [2021-06-05 04:33:46,151 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:33:46,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:33:46,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:33:46,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:33:46,152 INFO L87 Difference]: Start difference. First operand 95 states and 194 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:46,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:33:46,308 INFO L93 Difference]: Finished difference Result 117 states and 228 transitions. [2021-06-05 04:33:46,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:33:46,309 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 04:33:46,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:33:46,309 INFO L225 Difference]: With dead ends: 117 [2021-06-05 04:33:46,309 INFO L226 Difference]: Without dead ends: 98 [2021-06-05 04:33:46,309 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 311.6ms TimeCoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:33:46,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-06-05 04:33:46,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 96. [2021-06-05 04:33:46,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 2.0631578947368423) internal successors, (196), 95 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:46,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 196 transitions. [2021-06-05 04:33:46,310 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 196 transitions. Word has length 18 [2021-06-05 04:33:46,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:33:46,310 INFO L482 AbstractCegarLoop]: Abstraction has 96 states and 196 transitions. [2021-06-05 04:33:46,310 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 04:33:46,310 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 196 transitions. [2021-06-05 04:33:46,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:33:46,310 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:33:46,310 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:33:46,511 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 208 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1243 [2021-06-05 04:33:46,511 INFO L430 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:33:46,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:33:46,511 INFO L82 PathProgramCache]: Analyzing trace with hash -23341270, now seen corresponding path program 208 times [2021-06-05 04:33:46,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:33:46,511 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572682791] [2021-06-05 04:33:46,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:33:46,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:33:46,681 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:33:46,682 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:33:46,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572682791] [2021-06-05 04:33:46,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572682791] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:46,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288607565] [2021-06-05 04:33:46,682 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:33:46,705 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:33:46,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:33:46,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 04:33:46,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:33:46,884 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:46,885 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:46,885 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 27 treesize of output 21 [2021-06-05 04:33:46,886 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:46,888 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:46,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 04:33:46,890 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:46,911 INFO L628 ElimStorePlain]: treesize reduction 40, result has 38.5 percent of original size [2021-06-05 04:33:46,913 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:46,913 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 10 treesize of output 6 [2021-06-05 04:33:46,914 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:33:46,921 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:33:46,922 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 04:33:46,922 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:83, output treesize:14 [2021-06-05 04:33:46,961 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:33:46,961 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [288607565] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:46,961 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:33:46,961 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-06-05 04:33:46,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156326395] [2021-06-05 04:33:46,962 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:33:46,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:33:46,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:33:46,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:33:46,962 INFO L87 Difference]: Start difference. First operand 96 states and 196 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:47,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:33:47,175 INFO L93 Difference]: Finished difference Result 115 states and 225 transitions. [2021-06-05 04:33:47,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:33:47,176 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:33:47,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:33:47,176 INFO L225 Difference]: With dead ends: 115 [2021-06-05 04:33:47,176 INFO L226 Difference]: Without dead ends: 99 [2021-06-05 04:33:47,176 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 364.8ms TimeCoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:33:47,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-06-05 04:33:47,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 97. [2021-06-05 04:33:47,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 2.0625) internal successors, (198), 96 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:47,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 198 transitions. [2021-06-05 04:33:47,177 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 198 transitions. Word has length 18 [2021-06-05 04:33:47,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:33:47,177 INFO L482 AbstractCegarLoop]: Abstraction has 97 states and 198 transitions. [2021-06-05 04:33:47,177 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 04:33:47,177 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 198 transitions. [2021-06-05 04:33:47,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:33:47,178 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:33:47,178 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:33:47,378 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1247 [2021-06-05 04:33:47,378 INFO L430 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:33:47,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:33:47,378 INFO L82 PathProgramCache]: Analyzing trace with hash 838663794, now seen corresponding path program 209 times [2021-06-05 04:33:47,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:33:47,378 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105764414] [2021-06-05 04:33:47,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:33:47,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:33:47,557 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:33:47,557 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:33:47,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105764414] [2021-06-05 04:33:47,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105764414] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:47,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760492740] [2021-06-05 04:33:47,557 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:33:47,581 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:33:47,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:33:47,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 04:33:47,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:33:47,784 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:47,784 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:47,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 04:33:47,785 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:47,787 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:47,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 04:33:47,788 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:47,809 INFO L628 ElimStorePlain]: treesize reduction 40, result has 38.5 percent of original size [2021-06-05 04:33:47,811 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:47,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:33:47,812 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:33:47,819 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:33:47,820 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 04:33:47,820 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:83, output treesize:14 [2021-06-05 04:33:47,861 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:33:47,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [760492740] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:47,861 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:33:47,861 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-06-05 04:33:47,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801698787] [2021-06-05 04:33:47,861 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:33:47,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:33:47,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:33:47,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:33:47,862 INFO L87 Difference]: Start difference. First operand 97 states and 198 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:48,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:33:48,175 INFO L93 Difference]: Finished difference Result 117 states and 233 transitions. [2021-06-05 04:33:48,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:33:48,176 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:33:48,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:33:48,176 INFO L225 Difference]: With dead ends: 117 [2021-06-05 04:33:48,176 INFO L226 Difference]: Without dead ends: 104 [2021-06-05 04:33:48,176 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 426.8ms TimeCoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:33:48,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-06-05 04:33:48,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 98. [2021-06-05 04:33:48,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 2.0618556701030926) internal successors, (200), 97 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:48,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 200 transitions. [2021-06-05 04:33:48,177 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 200 transitions. Word has length 18 [2021-06-05 04:33:48,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:33:48,177 INFO L482 AbstractCegarLoop]: Abstraction has 98 states and 200 transitions. [2021-06-05 04:33:48,177 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 04:33:48,177 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 200 transitions. [2021-06-05 04:33:48,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:33:48,177 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:33:48,177 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:33:48,378 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1251,210 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:33:48,378 INFO L430 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:33:48,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:33:48,378 INFO L82 PathProgramCache]: Analyzing trace with hash 1974849066, now seen corresponding path program 210 times [2021-06-05 04:33:48,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:33:48,378 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473100875] [2021-06-05 04:33:48,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:33:48,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:33:48,572 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:33:48,572 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:33:48,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473100875] [2021-06-05 04:33:48,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473100875] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:48,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239061955] [2021-06-05 04:33:48,572 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:33:48,597 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:33:48,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:33:48,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:33:48,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:33:48,766 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:48,766 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 19 treesize of output 15 [2021-06-05 04:33:48,767 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:48,788 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:33:48,791 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:48,791 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 10 treesize of output 6 [2021-06-05 04:33:48,792 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:33:48,813 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:33:48,815 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:48,816 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 19 treesize of output 15 [2021-06-05 04:33:48,816 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:48,836 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:33:48,838 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:48,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:33:48,840 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:33:48,858 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:33:48,859 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:33:48,859 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:77, output treesize:35 [2021-06-05 04:33:48,935 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:33:48,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [239061955] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:48,935 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:33:48,935 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-06-05 04:33:48,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034222202] [2021-06-05 04:33:48,935 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:33:48,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:33:48,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:33:48,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:33:48,935 INFO L87 Difference]: Start difference. First operand 98 states and 200 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:49,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:33:49,265 INFO L93 Difference]: Finished difference Result 118 states and 239 transitions. [2021-06-05 04:33:49,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:33:49,265 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 04:33:49,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:33:49,265 INFO L225 Difference]: With dead ends: 118 [2021-06-05 04:33:49,265 INFO L226 Difference]: Without dead ends: 109 [2021-06-05 04:33:49,265 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 502.5ms TimeCoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:33:49,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-06-05 04:33:49,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 96. [2021-06-05 04:33:49,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 2.0631578947368423) internal successors, (196), 95 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:49,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 196 transitions. [2021-06-05 04:33:49,266 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 196 transitions. Word has length 18 [2021-06-05 04:33:49,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:33:49,267 INFO L482 AbstractCegarLoop]: Abstraction has 96 states and 196 transitions. [2021-06-05 04:33:49,267 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 04:33:49,267 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 196 transitions. [2021-06-05 04:33:49,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:33:49,267 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:33:49,267 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:33:49,467 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1255,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:33:49,467 INFO L430 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:33:49,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:33:49,467 INFO L82 PathProgramCache]: Analyzing trace with hash 1695884842, now seen corresponding path program 211 times [2021-06-05 04:33:49,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:33:49,468 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742092281] [2021-06-05 04:33:49,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:33:49,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:33:49,615 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:33:49,615 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:33:49,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742092281] [2021-06-05 04:33:49,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742092281] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:49,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098161785] [2021-06-05 04:33:49,616 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:33:49,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:33:49,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 04:33:49,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:33:49,785 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:49,786 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:49,786 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 27 treesize of output 21 [2021-06-05 04:33:49,787 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:49,789 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:49,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 04:33:49,790 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:49,811 INFO L628 ElimStorePlain]: treesize reduction 34, result has 47.7 percent of original size [2021-06-05 04:33:49,812 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:49,813 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 21 treesize of output 13 [2021-06-05 04:33:49,813 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:49,820 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:33:49,821 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 04:33:49,821 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:83, output treesize:14 [2021-06-05 04:33:49,858 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:33:49,858 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1098161785] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:49,858 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:33:49,858 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-06-05 04:33:49,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381507138] [2021-06-05 04:33:49,859 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:33:49,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:33:49,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:33:49,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:33:49,859 INFO L87 Difference]: Start difference. First operand 96 states and 196 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:50,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:33:50,041 INFO L93 Difference]: Finished difference Result 116 states and 227 transitions. [2021-06-05 04:33:50,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:33:50,041 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 04:33:50,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:33:50,041 INFO L225 Difference]: With dead ends: 116 [2021-06-05 04:33:50,041 INFO L226 Difference]: Without dead ends: 100 [2021-06-05 04:33:50,042 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 308.3ms TimeCoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:33:50,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-06-05 04:33:50,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 98. [2021-06-05 04:33:50,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 2.0618556701030926) internal successors, (200), 97 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:50,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 200 transitions. [2021-06-05 04:33:50,042 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 200 transitions. Word has length 18 [2021-06-05 04:33:50,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:33:50,043 INFO L482 AbstractCegarLoop]: Abstraction has 98 states and 200 transitions. [2021-06-05 04:33:50,043 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 04:33:50,043 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 200 transitions. [2021-06-05 04:33:50,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:33:50,043 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:33:50,043 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:33:50,243 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1260,212 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:33:50,243 INFO L430 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:33:50,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:33:50,244 INFO L82 PathProgramCache]: Analyzing trace with hash -1737077390, now seen corresponding path program 212 times [2021-06-05 04:33:50,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:33:50,244 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144069466] [2021-06-05 04:33:50,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:33:50,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:33:50,438 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 04:33:50,439 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:33:50,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144069466] [2021-06-05 04:33:50,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144069466] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:50,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032670619] [2021-06-05 04:33:50,439 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:33:50,463 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:33:50,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:33:50,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:33:50,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:33:50,638 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:50,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:33:50,639 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:50,645 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:33:50,646 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:50,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 04:33:50,648 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:33:50,653 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:33:50,654 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 04:33:50,654 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:32, output treesize:13 [2021-06-05 04:33:50,690 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 04:33:50,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1032670619] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:50,691 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:33:50,691 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-06-05 04:33:50,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291507555] [2021-06-05 04:33:50,691 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:33:50,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:33:50,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:33:50,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:33:50,691 INFO L87 Difference]: Start difference. First operand 98 states and 200 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:51,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:33:51,041 INFO L93 Difference]: Finished difference Result 118 states and 238 transitions. [2021-06-05 04:33:51,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:33:51,042 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 04:33:51,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:33:51,042 INFO L225 Difference]: With dead ends: 118 [2021-06-05 04:33:51,042 INFO L226 Difference]: Without dead ends: 111 [2021-06-05 04:33:51,042 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 462.3ms TimeCoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:33:51,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-06-05 04:33:51,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 99. [2021-06-05 04:33:51,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 2.0714285714285716) internal successors, (203), 98 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:51,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 203 transitions. [2021-06-05 04:33:51,043 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 203 transitions. Word has length 18 [2021-06-05 04:33:51,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:33:51,043 INFO L482 AbstractCegarLoop]: Abstraction has 99 states and 203 transitions. [2021-06-05 04:33:51,043 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 04:33:51,043 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 203 transitions. [2021-06-05 04:33:51,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:33:51,044 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:33:51,044 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:33:51,244 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1263,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:33:51,244 INFO L430 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:33:51,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:33:51,244 INFO L82 PathProgramCache]: Analyzing trace with hash -600892118, now seen corresponding path program 213 times [2021-06-05 04:33:51,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:33:51,245 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866327516] [2021-06-05 04:33:51,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:33:51,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:33:51,441 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:33:51,441 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:33:51,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866327516] [2021-06-05 04:33:51,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866327516] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:51,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [340986056] [2021-06-05 04:33:51,441 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 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 04:33:51,466 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:33:51,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:33:51,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:33:51,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:33:51,605 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:51,605 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 19 treesize of output 15 [2021-06-05 04:33:51,606 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:51,628 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:33:51,630 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:51,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 04:33:51,632 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:33:51,654 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:33:51,656 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:51,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:33:51,657 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:51,676 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:33:51,679 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:51,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 04:33:51,680 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:33:51,699 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:33:51,700 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 04:33:51,700 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:77, output treesize:35 [2021-06-05 04:33:51,774 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 04:33:51,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [340986056] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:51,774 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:33:51,774 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-06-05 04:33:51,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074144390] [2021-06-05 04:33:51,774 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:33:51,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:33:51,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:33:51,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:33:51,775 INFO L87 Difference]: Start difference. First operand 99 states and 203 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:52,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:33:52,352 INFO L93 Difference]: Finished difference Result 145 states and 280 transitions. [2021-06-05 04:33:52,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:33:52,353 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 04:33:52,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:33:52,353 INFO L225 Difference]: With dead ends: 145 [2021-06-05 04:33:52,353 INFO L226 Difference]: Without dead ends: 129 [2021-06-05 04:33:52,353 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 634.2ms TimeCoverageRelationStatistics Valid=100, Invalid=656, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:33:52,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-06-05 04:33:52,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 100. [2021-06-05 04:33:52,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 2.080808080808081) internal successors, (206), 99 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:52,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 206 transitions. [2021-06-05 04:33:52,354 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 206 transitions. Word has length 18 [2021-06-05 04:33:52,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:33:52,354 INFO L482 AbstractCegarLoop]: Abstraction has 100 states and 206 transitions. [2021-06-05 04:33:52,355 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 04:33:52,355 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 206 transitions. [2021-06-05 04:33:52,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:33:52,355 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:33:52,355 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:33:52,555 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1267 [2021-06-05 04:33:52,555 INFO L430 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:33:52,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:33:52,556 INFO L82 PathProgramCache]: Analyzing trace with hash -434692494, now seen corresponding path program 214 times [2021-06-05 04:33:52,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:33:52,556 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871051899] [2021-06-05 04:33:52,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:33:52,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:33:52,705 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:33:52,705 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:33:52,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871051899] [2021-06-05 04:33:52,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871051899] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:52,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75722986] [2021-06-05 04:33:52,706 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:33:52,730 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:33:52,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:33:52,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 04:33:52,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:33:52,871 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:52,872 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:52,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 04:33:52,873 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:52,875 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:52,875 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 27 treesize of output 21 [2021-06-05 04:33:52,876 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:52,897 INFO L628 ElimStorePlain]: treesize reduction 40, result has 38.5 percent of original size [2021-06-05 04:33:52,899 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:52,899 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 10 treesize of output 6 [2021-06-05 04:33:52,901 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:33:52,907 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:33:52,909 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 04:33:52,909 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:83, output treesize:14 [2021-06-05 04:33:52,947 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:33:52,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [75722986] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:52,947 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:33:52,948 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-06-05 04:33:52,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818729585] [2021-06-05 04:33:52,948 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:33:52,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:33:52,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:33:52,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:33:52,948 INFO L87 Difference]: Start difference. First operand 100 states and 206 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:53,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:33:53,238 INFO L93 Difference]: Finished difference Result 124 states and 249 transitions. [2021-06-05 04:33:53,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:33:53,238 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 04:33:53,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:33:53,238 INFO L225 Difference]: With dead ends: 124 [2021-06-05 04:33:53,238 INFO L226 Difference]: Without dead ends: 111 [2021-06-05 04:33:53,238 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 364.2ms TimeCoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:33:53,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-06-05 04:33:53,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 105. [2021-06-05 04:33:53,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 2.076923076923077) internal successors, (216), 104 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:53,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 216 transitions. [2021-06-05 04:33:53,239 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 216 transitions. Word has length 18 [2021-06-05 04:33:53,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:33:53,239 INFO L482 AbstractCegarLoop]: Abstraction has 105 states and 216 transitions. [2021-06-05 04:33:53,239 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 04:33:53,240 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 216 transitions. [2021-06-05 04:33:53,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:33:53,240 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:33:53,240 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:33:53,440 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1272,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:33:53,440 INFO L430 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:33:53,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:33:53,440 INFO L82 PathProgramCache]: Analyzing trace with hash 701492778, now seen corresponding path program 215 times [2021-06-05 04:33:53,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:33:53,441 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699191900] [2021-06-05 04:33:53,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:33:53,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:33:53,625 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:33:53,625 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:33:53,625 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699191900] [2021-06-05 04:33:53,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699191900] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:53,625 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1163755177] [2021-06-05 04:33:53,625 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:33:53,650 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:33:53,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:33:53,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 04:33:53,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:33:53,759 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:53,760 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:53,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:33:53,761 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:53,763 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:53,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:33:53,764 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:53,825 INFO L628 ElimStorePlain]: treesize reduction 88, result has 45.0 percent of original size [2021-06-05 04:33:53,827 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:53,827 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 19 treesize of output 15 [2021-06-05 04:33:53,828 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:53,850 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:33:53,855 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:53,855 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 10 treesize of output 6 [2021-06-05 04:33:53,856 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:33:53,878 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:33:53,880 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:53,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 04:33:53,882 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:33:53,902 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:33:53,906 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:33:53,906 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-06-05 04:33:53,997 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:33:53,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1163755177] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:53,997 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:33:53,998 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-06-05 04:33:53,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707241349] [2021-06-05 04:33:53,998 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:33:53,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:33:53,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:33:53,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:33:53,998 INFO L87 Difference]: Start difference. First operand 105 states and 216 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:54,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:33:54,406 INFO L93 Difference]: Finished difference Result 146 states and 282 transitions. [2021-06-05 04:33:54,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:33:54,406 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 04:33:54,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:33:54,406 INFO L225 Difference]: With dead ends: 146 [2021-06-05 04:33:54,407 INFO L226 Difference]: Without dead ends: 127 [2021-06-05 04:33:54,407 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 520.4ms TimeCoverageRelationStatistics Valid=96, Invalid=606, Unknown=0, NotChecked=0, Total=702 [2021-06-05 04:33:54,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-06-05 04:33:54,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 104. [2021-06-05 04:33:54,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 2.0776699029126213) internal successors, (214), 103 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:54,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 214 transitions. [2021-06-05 04:33:54,408 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 214 transitions. Word has length 18 [2021-06-05 04:33:54,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:33:54,408 INFO L482 AbstractCegarLoop]: Abstraction has 104 states and 214 transitions. [2021-06-05 04:33:54,408 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 04:33:54,408 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 214 transitions. [2021-06-05 04:33:54,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:33:54,408 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:33:54,408 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:33:54,608 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1276 [2021-06-05 04:33:54,609 INFO L430 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:33:54,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:33:54,609 INFO L82 PathProgramCache]: Analyzing trace with hash -1444677982, now seen corresponding path program 216 times [2021-06-05 04:33:54,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:33:54,609 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759803633] [2021-06-05 04:33:54,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:33:54,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:33:54,781 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:33:54,782 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:33:54,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759803633] [2021-06-05 04:33:54,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759803633] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:54,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042027902] [2021-06-05 04:33:54,782 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:33:54,811 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:33:54,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:33:54,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:33:54,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:33:54,894 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:54,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:54,895 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 19 treesize of output 15 [2021-06-05 04:33:54,896 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:54,898 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:54,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:33:54,899 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:54,920 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:33:54,922 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:54,922 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:54,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:33:54,924 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:33:54,926 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:54,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 04:33:54,927 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:33:54,953 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:33:54,955 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:33:54,955 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:35 [2021-06-05 04:33:55,027 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:33:55,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2042027902] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:55,027 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:33:55,027 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-06-05 04:33:55,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594618730] [2021-06-05 04:33:55,027 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:33:55,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:33:55,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:33:55,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:33:55,028 INFO L87 Difference]: Start difference. First operand 104 states and 214 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:55,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:33:55,738 INFO L93 Difference]: Finished difference Result 170 states and 330 transitions. [2021-06-05 04:33:55,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:33:55,739 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 04:33:55,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:33:55,739 INFO L225 Difference]: With dead ends: 170 [2021-06-05 04:33:55,739 INFO L226 Difference]: Without dead ends: 147 [2021-06-05 04:33:55,739 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 754.4ms TimeCoverageRelationStatistics Valid=129, Invalid=863, Unknown=0, NotChecked=0, Total=992 [2021-06-05 04:33:55,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-06-05 04:33:55,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 103. [2021-06-05 04:33:55,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 2.0784313725490198) internal successors, (212), 102 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:55,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 212 transitions. [2021-06-05 04:33:55,741 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 212 transitions. Word has length 18 [2021-06-05 04:33:55,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:33:55,741 INFO L482 AbstractCegarLoop]: Abstraction has 103 states and 212 transitions. [2021-06-05 04:33:55,741 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 04:33:55,741 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 212 transitions. [2021-06-05 04:33:55,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:33:55,742 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:33:55,742 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:33:55,963 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1281 [2021-06-05 04:33:55,964 INFO L430 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:33:55,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:33:55,964 INFO L82 PathProgramCache]: Analyzing trace with hash 743505194, now seen corresponding path program 217 times [2021-06-05 04:33:55,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:33:55,964 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036106167] [2021-06-05 04:33:55,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:33:55,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:33:56,148 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 04:33:56,148 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:33:56,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036106167] [2021-06-05 04:33:56,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036106167] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:56,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557128147] [2021-06-05 04:33:56,148 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:33:56,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:33:56,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 04:33:56,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:33:56,284 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:56,285 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:56,285 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 19 treesize of output 15 [2021-06-05 04:33:56,286 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:56,288 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:56,289 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:56,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:33:56,289 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:56,292 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:56,292 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:56,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:33:56,293 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:56,296 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:56,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:33:56,296 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:56,352 INFO L628 ElimStorePlain]: treesize reduction 83, result has 43.5 percent of original size [2021-06-05 04:33:56,354 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:56,355 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:56,355 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 10 treesize of output 6 [2021-06-05 04:33:56,356 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:33:56,358 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:56,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:33:56,361 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:33:56,383 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:33:56,384 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:33:56,384 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:173, output treesize:38 [2021-06-05 04:33:56,462 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:33:56,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [557128147] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:56,462 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:33:56,462 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-06-05 04:33:56,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930909901] [2021-06-05 04:33:56,463 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:33:56,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:33:56,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:33:56,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:33:56,463 INFO L87 Difference]: Start difference. First operand 103 states and 212 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:57,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:33:57,099 INFO L93 Difference]: Finished difference Result 157 states and 309 transitions. [2021-06-05 04:33:57,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 04:33:57,100 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 04:33:57,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:33:57,100 INFO L225 Difference]: With dead ends: 157 [2021-06-05 04:33:57,100 INFO L226 Difference]: Without dead ends: 138 [2021-06-05 04:33:57,100 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 707.7ms TimeCoverageRelationStatistics Valid=112, Invalid=758, Unknown=0, NotChecked=0, Total=870 [2021-06-05 04:33:57,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-06-05 04:33:57,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 106. [2021-06-05 04:33:57,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 2.0952380952380953) internal successors, (220), 105 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:57,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 220 transitions. [2021-06-05 04:33:57,101 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 220 transitions. Word has length 18 [2021-06-05 04:33:57,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:33:57,101 INFO L482 AbstractCegarLoop]: Abstraction has 106 states and 220 transitions. [2021-06-05 04:33:57,101 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 04:33:57,101 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 220 transitions. [2021-06-05 04:33:57,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:33:57,102 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:33:57,102 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:33:57,302 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1284,218 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:33:57,302 INFO L430 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:33:57,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:33:57,302 INFO L82 PathProgramCache]: Analyzing trace with hash -1244440906, now seen corresponding path program 218 times [2021-06-05 04:33:57,302 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:33:57,302 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095854623] [2021-06-05 04:33:57,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:33:57,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:33:57,528 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:33:57,528 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:33:57,528 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095854623] [2021-06-05 04:33:57,528 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095854623] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:57,528 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154622650] [2021-06-05 04:33:57,528 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:33:57,567 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:33:57,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:33:57,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 04:33:57,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:33:57,791 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:57,791 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:57,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:33:57,793 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:57,795 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:57,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:33:57,796 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:57,823 INFO L628 ElimStorePlain]: treesize reduction 37, result has 43.1 percent of original size [2021-06-05 04:33:57,825 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:57,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 04:33:57,827 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:33:57,836 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:33:57,837 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:33:57,837 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:75, output treesize:14 [2021-06-05 04:33:57,886 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 04:33:57,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1154622650] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:57,886 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:33:57,886 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-05 04:33:57,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681153513] [2021-06-05 04:33:57,886 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 04:33:57,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:33:57,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 04:33:57,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:33:57,887 INFO L87 Difference]: Start difference. First operand 106 states and 220 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:58,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:33:58,053 INFO L93 Difference]: Finished difference Result 128 states and 254 transitions. [2021-06-05 04:33:58,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:33:58,054 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:33:58,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:33:58,054 INFO L225 Difference]: With dead ends: 128 [2021-06-05 04:33:58,054 INFO L226 Difference]: Without dead ends: 109 [2021-06-05 04:33:58,054 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 436.0ms TimeCoverageRelationStatistics Valid=57, Invalid=405, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:33:58,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-06-05 04:33:58,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 107. [2021-06-05 04:33:58,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 2.0943396226415096) internal successors, (222), 106 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:58,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 222 transitions. [2021-06-05 04:33:58,055 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 222 transitions. Word has length 18 [2021-06-05 04:33:58,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:33:58,055 INFO L482 AbstractCegarLoop]: Abstraction has 107 states and 222 transitions. [2021-06-05 04:33:58,055 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 04:33:58,055 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 222 transitions. [2021-06-05 04:33:58,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:33:58,056 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:33:58,056 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:33:58,256 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1287 [2021-06-05 04:33:58,256 INFO L430 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:33:58,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:33:58,256 INFO L82 PathProgramCache]: Analyzing trace with hash -292087698, now seen corresponding path program 219 times [2021-06-05 04:33:58,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:33:58,256 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431495165] [2021-06-05 04:33:58,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:33:58,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:33:58,433 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:33:58,433 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:33:58,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431495165] [2021-06-05 04:33:58,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431495165] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:58,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656638279] [2021-06-05 04:33:58,433 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:33:58,458 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:33:58,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:33:58,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 04:33:58,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:33:58,663 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:58,663 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:58,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 04:33:58,664 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:58,666 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:58,666 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 27 treesize of output 21 [2021-06-05 04:33:58,667 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:58,689 INFO L628 ElimStorePlain]: treesize reduction 40, result has 38.5 percent of original size [2021-06-05 04:33:58,690 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:58,691 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 10 treesize of output 6 [2021-06-05 04:33:58,692 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:33:58,699 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:33:58,699 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:33:58,699 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:83, output treesize:14 [2021-06-05 04:33:58,740 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:33:58,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1656638279] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:58,740 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:33:58,740 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-05 04:33:58,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163100786] [2021-06-05 04:33:58,740 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 04:33:58,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:33:58,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 04:33:58,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:33:58,741 INFO L87 Difference]: Start difference. First operand 107 states and 222 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:58,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:33:58,938 INFO L93 Difference]: Finished difference Result 126 states and 251 transitions. [2021-06-05 04:33:58,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:33:58,938 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:33:58,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:33:58,938 INFO L225 Difference]: With dead ends: 126 [2021-06-05 04:33:58,938 INFO L226 Difference]: Without dead ends: 110 [2021-06-05 04:33:58,938 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 393.7ms TimeCoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:33:58,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-06-05 04:33:58,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 108. [2021-06-05 04:33:58,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 2.0934579439252334) internal successors, (224), 107 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:58,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 224 transitions. [2021-06-05 04:33:58,939 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 224 transitions. Word has length 18 [2021-06-05 04:33:58,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:33:58,939 INFO L482 AbstractCegarLoop]: Abstraction has 108 states and 224 transitions. [2021-06-05 04:33:58,939 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 04:33:58,940 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 224 transitions. [2021-06-05 04:33:58,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:33:58,940 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:33:58,940 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:33:59,140 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1291,220 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:33:59,140 INFO L430 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:33:59,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:33:59,140 INFO L82 PathProgramCache]: Analyzing trace with hash 569917366, now seen corresponding path program 220 times [2021-06-05 04:33:59,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:33:59,141 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131726951] [2021-06-05 04:33:59,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:33:59,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:33:59,323 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:33:59,324 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:33:59,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131726951] [2021-06-05 04:33:59,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131726951] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:59,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1486924713] [2021-06-05 04:33:59,324 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:33:59,348 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:33:59,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:33:59,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 04:33:59,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:33:59,561 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:59,561 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:59,562 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 19 treesize of output 15 [2021-06-05 04:33:59,562 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:59,564 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:59,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:33:59,565 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:59,585 INFO L628 ElimStorePlain]: treesize reduction 37, result has 40.3 percent of original size [2021-06-05 04:33:59,587 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:59,587 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 10 treesize of output 6 [2021-06-05 04:33:59,588 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:33:59,595 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:33:59,596 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 04:33:59,596 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:75, output treesize:14 [2021-06-05 04:33:59,636 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 04:33:59,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1486924713] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:59,636 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:33:59,636 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-05 04:33:59,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026227268] [2021-06-05 04:33:59,636 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 04:33:59,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:33:59,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 04:33:59,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:33:59,637 INFO L87 Difference]: Start difference. First operand 108 states and 224 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:59,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:33:59,940 INFO L93 Difference]: Finished difference Result 127 states and 257 transitions. [2021-06-05 04:33:59,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:33:59,940 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:33:59,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:33:59,940 INFO L225 Difference]: With dead ends: 127 [2021-06-05 04:33:59,940 INFO L226 Difference]: Without dead ends: 114 [2021-06-05 04:33:59,940 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 477.8ms TimeCoverageRelationStatistics Valid=72, Invalid=528, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:33:59,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-06-05 04:33:59,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 109. [2021-06-05 04:33:59,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 2.0925925925925926) internal successors, (226), 108 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:59,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 226 transitions. [2021-06-05 04:33:59,942 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 226 transitions. Word has length 18 [2021-06-05 04:33:59,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:33:59,942 INFO L482 AbstractCegarLoop]: Abstraction has 109 states and 226 transitions. [2021-06-05 04:33:59,942 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 04:33:59,942 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 226 transitions. [2021-06-05 04:33:59,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:33:59,942 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:33:59,942 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:34:00,144 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1295,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:34:00,145 INFO L430 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:34:00,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:34:00,145 INFO L82 PathProgramCache]: Analyzing trace with hash 1706102638, now seen corresponding path program 221 times [2021-06-05 04:34:00,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:34:00,145 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434395138] [2021-06-05 04:34:00,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:34:00,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:34:00,342 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:34:00,342 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:34:00,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434395138] [2021-06-05 04:34:00,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434395138] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:34:00,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106457164] [2021-06-05 04:34:00,342 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:34:00,366 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:34:00,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:34:00,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 04:34:00,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:34:00,554 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:00,555 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:00,555 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 19 treesize of output 15 [2021-06-05 04:34:00,556 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:00,558 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:00,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:34:00,559 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:00,620 INFO L628 ElimStorePlain]: treesize reduction 85, result has 46.9 percent of original size [2021-06-05 04:34:00,622 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:00,623 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 13 treesize of output 9 [2021-06-05 04:34:00,624 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:34:00,647 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:34:00,650 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:00,650 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 19 treesize of output 15 [2021-06-05 04:34:00,651 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:00,672 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:34:00,675 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:00,675 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 13 treesize of output 9 [2021-06-05 04:34:00,676 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:34:00,697 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:34:00,698 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 04:34:00,698 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-06-05 04:34:00,778 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:34:00,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2106457164] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:34:00,779 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:34:00,779 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-05 04:34:00,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534995217] [2021-06-05 04:34:00,779 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 04:34:00,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:34:00,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 04:34:00,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=368, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:34:00,779 INFO L87 Difference]: Start difference. First operand 109 states and 226 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:01,528 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 65 [2021-06-05 04:34:02,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:34:02,106 INFO L93 Difference]: Finished difference Result 253 states and 456 transitions. [2021-06-05 04:34:02,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 04:34:02,106 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:34:02,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:34:02,107 INFO L225 Difference]: With dead ends: 253 [2021-06-05 04:34:02,107 INFO L226 Difference]: Without dead ends: 213 [2021-06-05 04:34:02,107 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 1432.9ms TimeCoverageRelationStatistics Valid=183, Invalid=1077, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 04:34:02,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2021-06-05 04:34:02,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 113. [2021-06-05 04:34:02,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.142857142857143) internal successors, (240), 112 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:02,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 240 transitions. [2021-06-05 04:34:02,108 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 240 transitions. Word has length 18 [2021-06-05 04:34:02,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:34:02,108 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 240 transitions. [2021-06-05 04:34:02,108 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 04:34:02,108 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 240 transitions. [2021-06-05 04:34:02,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:34:02,109 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:34:02,109 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:34:02,309 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1299 [2021-06-05 04:34:02,309 INFO L430 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:34:02,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:34:02,309 INFO L82 PathProgramCache]: Analyzing trace with hash -1177885978, now seen corresponding path program 222 times [2021-06-05 04:34:02,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:34:02,309 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546752964] [2021-06-05 04:34:02,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:34:02,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:34:02,456 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 04:34:02,457 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:34:02,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546752964] [2021-06-05 04:34:02,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546752964] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:34:02,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840369863] [2021-06-05 04:34:02,457 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:34:02,481 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:34:02,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:34:02,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:34:02,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:34:02,651 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:02,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:34:02,652 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:02,658 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:34:02,660 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:02,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 04:34:02,662 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:34:02,669 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:34:02,669 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 04:34:02,669 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:32, output treesize:13 [2021-06-05 04:34:02,702 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:34:02,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1840369863] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:34:02,703 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:34:02,703 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-06-05 04:34:02,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275693261] [2021-06-05 04:34:02,703 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:34:02,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:34:02,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:34:02,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:34:02,703 INFO L87 Difference]: Start difference. First operand 113 states and 240 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:02,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:34:02,924 INFO L93 Difference]: Finished difference Result 132 states and 272 transitions. [2021-06-05 04:34:02,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:34:02,924 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:34:02,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:34:02,925 INFO L225 Difference]: With dead ends: 132 [2021-06-05 04:34:02,925 INFO L226 Difference]: Without dead ends: 125 [2021-06-05 04:34:02,925 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 331.0ms TimeCoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:34:02,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-06-05 04:34:02,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 114. [2021-06-05 04:34:02,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 2.150442477876106) internal successors, (243), 113 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:02,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 243 transitions. [2021-06-05 04:34:02,926 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 243 transitions. Word has length 18 [2021-06-05 04:34:02,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:34:02,926 INFO L482 AbstractCegarLoop]: Abstraction has 114 states and 243 transitions. [2021-06-05 04:34:02,926 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:02,926 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 243 transitions. [2021-06-05 04:34:02,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:34:02,927 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:34:02,927 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:34:03,127 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1304,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:34:03,127 INFO L430 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:34:03,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:34:03,127 INFO L82 PathProgramCache]: Analyzing trace with hash -315880914, now seen corresponding path program 223 times [2021-06-05 04:34:03,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:34:03,127 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140836483] [2021-06-05 04:34:03,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:34:03,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:34:03,331 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:34:03,331 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:34:03,331 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140836483] [2021-06-05 04:34:03,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140836483] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:34:03,331 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292070787] [2021-06-05 04:34:03,331 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:34:03,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:34:03,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 04:34:03,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:34:03,598 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:03,599 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:03,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:34:03,600 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:03,603 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:03,603 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 19 treesize of output 15 [2021-06-05 04:34:03,604 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:03,632 INFO L628 ElimStorePlain]: treesize reduction 34, result has 45.2 percent of original size [2021-06-05 04:34:03,635 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:03,635 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 13 treesize of output 9 [2021-06-05 04:34:03,637 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:34:03,646 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:34:03,648 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 04:34:03,648 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:75, output treesize:14 [2021-06-05 04:34:03,684 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:34:03,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [292070787] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:34:03,684 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:34:03,684 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-06-05 04:34:03,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412913693] [2021-06-05 04:34:03,684 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:34:03,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:34:03,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:34:03,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:34:03,685 INFO L87 Difference]: Start difference. First operand 114 states and 243 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:03,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:34:03,973 INFO L93 Difference]: Finished difference Result 142 states and 291 transitions. [2021-06-05 04:34:03,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:34:03,974 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:34:03,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:34:03,974 INFO L225 Difference]: With dead ends: 142 [2021-06-05 04:34:03,974 INFO L226 Difference]: Without dead ends: 129 [2021-06-05 04:34:03,974 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 513.8ms TimeCoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:34:03,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-06-05 04:34:03,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 115. [2021-06-05 04:34:03,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 2.1491228070175437) internal successors, (245), 114 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:03,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 245 transitions. [2021-06-05 04:34:03,975 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 245 transitions. Word has length 18 [2021-06-05 04:34:03,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:34:03,975 INFO L482 AbstractCegarLoop]: Abstraction has 115 states and 245 transitions. [2021-06-05 04:34:03,975 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 04:34:03,975 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 245 transitions. [2021-06-05 04:34:03,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:34:03,976 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:34:03,976 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:34:04,176 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1307 [2021-06-05 04:34:04,176 INFO L430 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:34:04,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:34:04,176 INFO L82 PathProgramCache]: Analyzing trace with hash 820304358, now seen corresponding path program 224 times [2021-06-05 04:34:04,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:34:04,176 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396025157] [2021-06-05 04:34:04,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:34:04,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:34:04,349 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 04:34:04,349 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:34:04,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396025157] [2021-06-05 04:34:04,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396025157] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:34:04,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1946595978] [2021-06-05 04:34:04,349 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:34:04,373 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:34:04,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:34:04,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 04:34:04,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:34:04,535 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:04,536 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:04,536 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 19 treesize of output 15 [2021-06-05 04:34:04,537 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:04,539 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:04,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:34:04,540 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:04,601 INFO L628 ElimStorePlain]: treesize reduction 85, result has 46.9 percent of original size [2021-06-05 04:34:04,603 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:04,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 04:34:04,605 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:34:04,629 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:34:04,631 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:04,631 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 19 treesize of output 15 [2021-06-05 04:34:04,632 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:04,654 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:34:04,656 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:04,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:34:04,658 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:34:04,678 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:34:04,679 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 04:34:04,680 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-06-05 04:34:04,753 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:34:04,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1946595978] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:34:04,754 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:34:04,754 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-06-05 04:34:04,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484004371] [2021-06-05 04:34:04,754 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:34:04,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:34:04,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:34:04,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:34:04,754 INFO L87 Difference]: Start difference. First operand 115 states and 245 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:05,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:34:05,123 INFO L93 Difference]: Finished difference Result 163 states and 322 transitions. [2021-06-05 04:34:05,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:34:05,123 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:34:05,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:34:05,123 INFO L225 Difference]: With dead ends: 163 [2021-06-05 04:34:05,123 INFO L226 Difference]: Without dead ends: 144 [2021-06-05 04:34:05,124 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 511.7ms TimeCoverageRelationStatistics Valid=86, Invalid=564, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:34:05,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-06-05 04:34:05,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 114. [2021-06-05 04:34:05,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 2.150442477876106) internal successors, (243), 113 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:05,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 243 transitions. [2021-06-05 04:34:05,125 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 243 transitions. Word has length 18 [2021-06-05 04:34:05,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:34:05,125 INFO L482 AbstractCegarLoop]: Abstraction has 114 states and 243 transitions. [2021-06-05 04:34:05,125 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 04:34:05,125 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 243 transitions. [2021-06-05 04:34:05,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:34:05,125 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:34:05,125 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:34:05,325 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 225 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1311 [2021-06-05 04:34:05,326 INFO L430 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:34:05,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:34:05,326 INFO L82 PathProgramCache]: Analyzing trace with hash 578515942, now seen corresponding path program 225 times [2021-06-05 04:34:05,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:34:05,326 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694832391] [2021-06-05 04:34:05,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:34:05,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:34:05,472 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 04:34:05,472 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:34:05,472 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694832391] [2021-06-05 04:34:05,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694832391] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:34:05,472 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306678966] [2021-06-05 04:34:05,473 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:34:05,517 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:34:05,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:34:05,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:34:05,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:34:05,659 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:05,659 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:05,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:34:05,660 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:05,662 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:05,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:34:05,663 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:05,681 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:34:05,683 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:05,684 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:05,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:34:05,685 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:34:05,687 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:05,687 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 10 treesize of output 6 [2021-06-05 04:34:05,688 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:34:05,705 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:34:05,706 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 04:34:05,706 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:67, output treesize:29 [2021-06-05 04:34:05,760 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 04:34:05,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1306678966] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:34:05,760 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:34:05,760 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-05 04:34:05,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801372922] [2021-06-05 04:34:05,760 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 04:34:05,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:34:05,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 04:34:05,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:34:05,760 INFO L87 Difference]: Start difference. First operand 114 states and 243 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:06,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:34:06,095 INFO L93 Difference]: Finished difference Result 138 states and 286 transitions. [2021-06-05 04:34:06,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:34:06,095 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:34:06,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:34:06,096 INFO L225 Difference]: With dead ends: 138 [2021-06-05 04:34:06,096 INFO L226 Difference]: Without dead ends: 122 [2021-06-05 04:34:06,096 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 378.0ms TimeCoverageRelationStatistics Valid=72, Invalid=528, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:34:06,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-06-05 04:34:06,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 116. [2021-06-05 04:34:06,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 2.1478260869565218) internal successors, (247), 115 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:06,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 247 transitions. [2021-06-05 04:34:06,097 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 247 transitions. Word has length 18 [2021-06-05 04:34:06,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:34:06,097 INFO L482 AbstractCegarLoop]: Abstraction has 116 states and 247 transitions. [2021-06-05 04:34:06,097 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 04:34:06,097 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 247 transitions. [2021-06-05 04:34:06,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:34:06,097 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:34:06,097 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:34:06,298 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1316 [2021-06-05 04:34:06,298 INFO L430 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:34:06,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:34:06,298 INFO L82 PathProgramCache]: Analyzing trace with hash 1440521006, now seen corresponding path program 226 times [2021-06-05 04:34:06,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:34:06,298 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798959209] [2021-06-05 04:34:06,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:34:06,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:34:06,495 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:34:06,495 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:34:06,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798959209] [2021-06-05 04:34:06,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798959209] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:34:06,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903554110] [2021-06-05 04:34:06,495 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 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 04:34:06,519 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:34:06,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:34:06,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 04:34:06,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:34:06,722 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:06,723 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:06,723 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 19 treesize of output 15 [2021-06-05 04:34:06,724 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:06,725 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:06,726 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 19 treesize of output 15 [2021-06-05 04:34:06,726 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:06,747 INFO L628 ElimStorePlain]: treesize reduction 37, result has 40.3 percent of original size [2021-06-05 04:34:06,756 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:06,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:34:06,758 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:34:06,764 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:34:06,765 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 04:34:06,765 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:75, output treesize:14 [2021-06-05 04:34:06,800 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:34:06,800 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1903554110] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:34:06,800 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:34:06,800 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-06-05 04:34:06,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107322303] [2021-06-05 04:34:06,800 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:34:06,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:34:06,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:34:06,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:34:06,801 INFO L87 Difference]: Start difference. First operand 116 states and 247 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:07,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:34:07,101 INFO L93 Difference]: Finished difference Result 135 states and 280 transitions. [2021-06-05 04:34:07,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:34:07,101 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:34:07,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:34:07,101 INFO L225 Difference]: With dead ends: 135 [2021-06-05 04:34:07,101 INFO L226 Difference]: Without dead ends: 122 [2021-06-05 04:34:07,101 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 460.7ms TimeCoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:34:07,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-06-05 04:34:07,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 117. [2021-06-05 04:34:07,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 2.146551724137931) internal successors, (249), 116 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:07,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 249 transitions. [2021-06-05 04:34:07,103 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 249 transitions. Word has length 18 [2021-06-05 04:34:07,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:34:07,103 INFO L482 AbstractCegarLoop]: Abstraction has 117 states and 249 transitions. [2021-06-05 04:34:07,103 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 04:34:07,103 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 249 transitions. [2021-06-05 04:34:07,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:34:07,103 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:34:07,103 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:34:07,303 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 227 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1322 [2021-06-05 04:34:07,303 INFO L430 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:34:07,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:34:07,304 INFO L82 PathProgramCache]: Analyzing trace with hash -1718261018, now seen corresponding path program 227 times [2021-06-05 04:34:07,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:34:07,304 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583372385] [2021-06-05 04:34:07,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:34:07,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:34:07,505 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:34:07,505 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:34:07,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583372385] [2021-06-05 04:34:07,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583372385] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:34:07,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331702567] [2021-06-05 04:34:07,505 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:34:07,530 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:34:07,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:34:07,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 04:34:07,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:34:07,686 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:07,686 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:07,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:34:07,687 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:07,690 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:07,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:34:07,691 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:07,750 INFO L628 ElimStorePlain]: treesize reduction 85, result has 46.9 percent of original size [2021-06-05 04:34:07,753 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:07,753 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 13 treesize of output 9 [2021-06-05 04:34:07,755 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:34:07,778 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:34:07,781 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:07,781 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 19 treesize of output 15 [2021-06-05 04:34:07,782 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:07,804 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:34:07,806 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:07,807 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 13 treesize of output 9 [2021-06-05 04:34:07,808 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:34:07,829 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:34:07,830 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 04:34:07,830 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-06-05 04:34:07,906 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:34:07,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1331702567] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:34:07,906 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:34:07,906 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-05 04:34:07,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232967378] [2021-06-05 04:34:07,907 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 04:34:07,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:34:07,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 04:34:07,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:34:07,907 INFO L87 Difference]: Start difference. First operand 117 states and 249 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:08,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:34:08,174 INFO L93 Difference]: Finished difference Result 135 states and 278 transitions. [2021-06-05 04:34:08,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:34:08,175 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:34:08,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:34:08,175 INFO L225 Difference]: With dead ends: 135 [2021-06-05 04:34:08,175 INFO L226 Difference]: Without dead ends: 123 [2021-06-05 04:34:08,175 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 441.1ms TimeCoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:34:08,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-06-05 04:34:08,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 118. [2021-06-05 04:34:08,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 2.1452991452991452) internal successors, (251), 117 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:08,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 251 transitions. [2021-06-05 04:34:08,176 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 251 transitions. Word has length 18 [2021-06-05 04:34:08,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:34:08,176 INFO L482 AbstractCegarLoop]: Abstraction has 118 states and 251 transitions. [2021-06-05 04:34:08,176 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 04:34:08,176 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 251 transitions. [2021-06-05 04:34:08,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:34:08,176 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:34:08,177 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:34:08,377 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1326,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:34:08,377 INFO L430 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:34:08,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:34:08,377 INFO L82 PathProgramCache]: Analyzing trace with hash -666263114, now seen corresponding path program 228 times [2021-06-05 04:34:08,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:34:08,377 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984972622] [2021-06-05 04:34:08,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:34:08,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:34:08,562 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:34:08,563 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:34:08,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984972622] [2021-06-05 04:34:08,563 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984972622] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:34:08,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086140898] [2021-06-05 04:34:08,563 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:34:08,601 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:34:08,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:34:08,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 04:34:08,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:34:08,769 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:08,769 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:08,769 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 27 treesize of output 21 [2021-06-05 04:34:08,770 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:08,772 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:08,772 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 27 treesize of output 21 [2021-06-05 04:34:08,773 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:08,794 INFO L628 ElimStorePlain]: treesize reduction 34, result has 47.7 percent of original size [2021-06-05 04:34:08,796 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:08,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 04:34:08,797 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:08,803 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:34:08,804 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:34:08,804 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:83, output treesize:14 [2021-06-05 04:34:08,841 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:34:08,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1086140898] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:34:08,842 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:34:08,842 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-05 04:34:08,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277025181] [2021-06-05 04:34:08,842 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 04:34:08,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:34:08,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 04:34:08,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:34:08,842 INFO L87 Difference]: Start difference. First operand 118 states and 251 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:09,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:34:09,129 INFO L93 Difference]: Finished difference Result 140 states and 290 transitions. [2021-06-05 04:34:09,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:34:09,130 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:34:09,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:34:09,130 INFO L225 Difference]: With dead ends: 140 [2021-06-05 04:34:09,130 INFO L226 Difference]: Without dead ends: 127 [2021-06-05 04:34:09,130 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 432.9ms TimeCoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:34:09,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-06-05 04:34:09,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 120. [2021-06-05 04:34:09,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 2.142857142857143) internal successors, (255), 119 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:09,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 255 transitions. [2021-06-05 04:34:09,131 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 255 transitions. Word has length 18 [2021-06-05 04:34:09,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:34:09,131 INFO L482 AbstractCegarLoop]: Abstraction has 120 states and 255 transitions. [2021-06-05 04:34:09,131 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 04:34:09,131 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 255 transitions. [2021-06-05 04:34:09,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:34:09,132 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:34:09,132 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:34:09,332 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 229 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1331 [2021-06-05 04:34:09,332 INFO L430 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:34:09,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:34:09,332 INFO L82 PathProgramCache]: Analyzing trace with hash 469922158, now seen corresponding path program 229 times [2021-06-05 04:34:09,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:34:09,332 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468059459] [2021-06-05 04:34:09,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:34:09,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:34:09,502 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 04:34:09,502 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:34:09,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468059459] [2021-06-05 04:34:09,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468059459] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:34:09,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474479] [2021-06-05 04:34:09,502 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:34:09,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:34:09,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 04:34:09,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:34:09,643 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:09,643 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:09,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:34:09,644 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:09,647 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:09,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:34:09,648 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:09,707 INFO L628 ElimStorePlain]: treesize reduction 85, result has 46.9 percent of original size [2021-06-05 04:34:09,710 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:09,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 04:34:09,711 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:34:09,735 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:34:09,737 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:09,737 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 19 treesize of output 15 [2021-06-05 04:34:09,738 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:09,759 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:34:09,762 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:09,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:34:09,763 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:34:09,784 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:34:09,785 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 04:34:09,785 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-06-05 04:34:09,858 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:34:09,858 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [474479] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:34:09,858 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:34:09,858 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-05 04:34:09,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228037487] [2021-06-05 04:34:09,858 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 04:34:09,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:34:09,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 04:34:09,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:34:09,859 INFO L87 Difference]: Start difference. First operand 120 states and 255 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:10,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:34:10,196 INFO L93 Difference]: Finished difference Result 138 states and 284 transitions. [2021-06-05 04:34:10,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:34:10,196 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:34:10,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:34:10,196 INFO L225 Difference]: With dead ends: 138 [2021-06-05 04:34:10,197 INFO L226 Difference]: Without dead ends: 126 [2021-06-05 04:34:10,197 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 440.5ms TimeCoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:34:10,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-06-05 04:34:10,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 119. [2021-06-05 04:34:10,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 2.1440677966101696) internal successors, (253), 118 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:10,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 253 transitions. [2021-06-05 04:34:10,198 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 253 transitions. Word has length 18 [2021-06-05 04:34:10,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:34:10,198 INFO L482 AbstractCegarLoop]: Abstraction has 119 states and 253 transitions. [2021-06-05 04:34:10,198 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 04:34:10,198 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 253 transitions. [2021-06-05 04:34:10,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:34:10,198 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:34:10,198 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:34:10,398 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 230 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1335 [2021-06-05 04:34:10,399 INFO L430 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:34:10,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:34:10,399 INFO L82 PathProgramCache]: Analyzing trace with hash -1676248602, now seen corresponding path program 230 times [2021-06-05 04:34:10,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:34:10,399 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397045328] [2021-06-05 04:34:10,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:34:10,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:34:10,552 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:34:10,553 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:34:10,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397045328] [2021-06-05 04:34:10,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397045328] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:34:10,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201672346] [2021-06-05 04:34:10,553 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:34:10,577 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:34:10,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:34:10,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:34:10,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:34:10,668 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:10,668 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:10,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:34:10,669 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:10,671 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:10,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:34:10,672 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:10,693 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:34:10,696 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:10,696 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:10,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:34:10,698 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:34:10,700 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:10,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 04:34:10,701 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:34:10,721 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:34:10,722 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 04:34:10,722 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:35 [2021-06-05 04:34:10,803 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:34:10,803 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1201672346] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:34:10,803 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:34:10,804 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-05 04:34:10,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121549144] [2021-06-05 04:34:10,804 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 04:34:10,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:34:10,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 04:34:10,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:34:10,804 INFO L87 Difference]: Start difference. First operand 119 states and 253 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:11,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:34:11,210 INFO L93 Difference]: Finished difference Result 147 states and 310 transitions. [2021-06-05 04:34:11,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:34:11,210 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:34:11,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:34:11,211 INFO L225 Difference]: With dead ends: 147 [2021-06-05 04:34:11,211 INFO L226 Difference]: Without dead ends: 138 [2021-06-05 04:34:11,211 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 468.4ms TimeCoverageRelationStatistics Valid=94, Invalid=608, Unknown=0, NotChecked=0, Total=702 [2021-06-05 04:34:11,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-06-05 04:34:11,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 120. [2021-06-05 04:34:11,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 2.1512605042016806) internal successors, (256), 119 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:11,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 256 transitions. [2021-06-05 04:34:11,212 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 256 transitions. Word has length 18 [2021-06-05 04:34:11,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:34:11,212 INFO L482 AbstractCegarLoop]: Abstraction has 120 states and 256 transitions. [2021-06-05 04:34:11,212 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 04:34:11,212 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 256 transitions. [2021-06-05 04:34:11,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:34:11,212 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:34:11,213 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:34:11,413 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1340,231 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:34:11,413 INFO L430 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:34:11,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:34:11,413 INFO L82 PathProgramCache]: Analyzing trace with hash 1052962998, now seen corresponding path program 231 times [2021-06-05 04:34:11,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:34:11,413 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932522938] [2021-06-05 04:34:11,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:34:11,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:34:11,552 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:34:11,552 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:34:11,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932522938] [2021-06-05 04:34:11,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932522938] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:34:11,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101183062] [2021-06-05 04:34:11,552 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:34:11,577 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 04:34:11,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:34:11,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:34:11,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:34:11,720 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:11,720 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:11,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:34:11,721 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:11,723 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:11,723 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 19 treesize of output 15 [2021-06-05 04:34:11,724 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:11,742 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:34:11,744 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:11,745 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:11,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 04:34:11,746 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:34:11,748 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:11,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 04:34:11,749 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:34:11,766 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:34:11,767 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 04:34:11,767 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:67, output treesize:29 [2021-06-05 04:34:11,816 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:34:11,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2101183062] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:34:11,816 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:34:11,816 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-05 04:34:11,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259295033] [2021-06-05 04:34:11,816 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 04:34:11,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:34:11,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 04:34:11,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:34:11,817 INFO L87 Difference]: Start difference. First operand 120 states and 256 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:12,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:34:12,139 INFO L93 Difference]: Finished difference Result 142 states and 295 transitions. [2021-06-05 04:34:12,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:34:12,140 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:34:12,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:34:12,140 INFO L225 Difference]: With dead ends: 142 [2021-06-05 04:34:12,140 INFO L226 Difference]: Without dead ends: 129 [2021-06-05 04:34:12,140 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 339.7ms TimeCoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:34:12,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-06-05 04:34:12,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 124. [2021-06-05 04:34:12,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 2.1463414634146343) internal successors, (264), 123 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:12,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 264 transitions. [2021-06-05 04:34:12,141 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 264 transitions. Word has length 18 [2021-06-05 04:34:12,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:34:12,141 INFO L482 AbstractCegarLoop]: Abstraction has 124 states and 264 transitions. [2021-06-05 04:34:12,141 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 04:34:12,142 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 264 transitions. [2021-06-05 04:34:12,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:34:12,142 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:34:12,142 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:34:12,344 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 232 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1343 [2021-06-05 04:34:12,345 INFO L430 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:34:12,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:34:12,345 INFO L82 PathProgramCache]: Analyzing trace with hash -2105819026, now seen corresponding path program 232 times [2021-06-05 04:34:12,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:34:12,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713383480] [2021-06-05 04:34:12,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:34:12,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:34:12,521 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:34:12,521 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:34:12,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713383480] [2021-06-05 04:34:12,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713383480] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:34:12,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178948821] [2021-06-05 04:34:12,521 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:34:12,545 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:34:12,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:34:12,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 04:34:12,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:34:12,667 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:12,667 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:12,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:34:12,668 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:12,671 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:12,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:34:12,672 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:12,733 INFO L628 ElimStorePlain]: treesize reduction 88, result has 46.0 percent of original size [2021-06-05 04:34:12,736 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:12,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 04:34:12,738 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:34:12,761 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:34:12,764 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:12,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:34:12,765 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:12,786 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:34:12,789 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:12,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 04:34:12,790 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:34:12,811 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:34:12,812 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 04:34:12,812 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-06-05 04:34:12,892 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:34:12,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [178948821] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:34:12,892 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:34:12,892 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-05 04:34:12,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065173900] [2021-06-05 04:34:12,892 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 04:34:12,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:34:12,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 04:34:12,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:34:12,892 INFO L87 Difference]: Start difference. First operand 124 states and 264 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:13,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:34:13,217 INFO L93 Difference]: Finished difference Result 162 states and 324 transitions. [2021-06-05 04:34:13,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:34:13,218 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:34:13,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:34:13,218 INFO L225 Difference]: With dead ends: 162 [2021-06-05 04:34:13,218 INFO L226 Difference]: Without dead ends: 143 [2021-06-05 04:34:13,218 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 455.0ms TimeCoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:34:13,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-06-05 04:34:13,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 123. [2021-06-05 04:34:13,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 122 states have (on average 2.1475409836065573) internal successors, (262), 122 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:13,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 262 transitions. [2021-06-05 04:34:13,220 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 262 transitions. Word has length 18 [2021-06-05 04:34:13,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:34:13,220 INFO L482 AbstractCegarLoop]: Abstraction has 123 states and 262 transitions. [2021-06-05 04:34:13,220 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 04:34:13,220 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 262 transitions. [2021-06-05 04:34:13,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:34:13,220 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:34:13,220 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:34:13,436 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1349 [2021-06-05 04:34:13,437 INFO L430 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:34:13,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:34:13,437 INFO L82 PathProgramCache]: Analyzing trace with hash 42977510, now seen corresponding path program 233 times [2021-06-05 04:34:13,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:34:13,437 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179126110] [2021-06-05 04:34:13,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:34:13,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:34:13,627 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:34:13,627 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:34:13,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179126110] [2021-06-05 04:34:13,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179126110] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:34:13,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593567277] [2021-06-05 04:34:13,628 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:34:13,664 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:34:13,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:34:13,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 04:34:13,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:34:13,801 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:13,802 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:13,802 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 19 treesize of output 15 [2021-06-05 04:34:13,803 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:13,806 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:13,807 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:13,807 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 19 treesize of output 15 [2021-06-05 04:34:13,808 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:13,811 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:13,811 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:13,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:34:13,813 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:13,816 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:13,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:34:13,817 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:13,881 INFO L628 ElimStorePlain]: treesize reduction 80, result has 45.6 percent of original size [2021-06-05 04:34:13,883 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:13,883 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:13,884 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 10 treesize of output 6 [2021-06-05 04:34:13,885 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:34:13,887 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:13,887 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 13 treesize of output 9 [2021-06-05 04:34:13,889 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:34:13,911 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:34:13,912 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 04:34:13,912 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:173, output treesize:38 [2021-06-05 04:34:13,984 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:34:13,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [593567277] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:34:13,984 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:34:13,984 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-06-05 04:34:13,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4656267] [2021-06-05 04:34:13,984 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:34:13,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:34:13,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:34:13,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:34:13,985 INFO L87 Difference]: Start difference. First operand 123 states and 262 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:14,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:34:14,350 INFO L93 Difference]: Finished difference Result 172 states and 349 transitions. [2021-06-05 04:34:14,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:34:14,350 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:34:14,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:34:14,351 INFO L225 Difference]: With dead ends: 172 [2021-06-05 04:34:14,351 INFO L226 Difference]: Without dead ends: 153 [2021-06-05 04:34:14,351 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 505.8ms TimeCoverageRelationStatistics Valid=94, Invalid=556, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:34:14,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-06-05 04:34:14,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 123. [2021-06-05 04:34:14,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 122 states have (on average 2.1475409836065573) internal successors, (262), 122 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:14,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 262 transitions. [2021-06-05 04:34:14,352 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 262 transitions. Word has length 18 [2021-06-05 04:34:14,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:34:14,352 INFO L482 AbstractCegarLoop]: Abstraction has 123 states and 262 transitions. [2021-06-05 04:34:14,352 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 04:34:14,352 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 262 transitions. [2021-06-05 04:34:14,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:34:14,352 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:34:14,352 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:34:14,553 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 234 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1354 [2021-06-05 04:34:14,553 INFO L430 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:34:14,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:34:14,553 INFO L82 PathProgramCache]: Analyzing trace with hash -2063806610, now seen corresponding path program 234 times [2021-06-05 04:34:14,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:34:14,553 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262592782] [2021-06-05 04:34:14,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:34:14,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:34:14,738 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:34:14,738 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:34:14,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262592782] [2021-06-05 04:34:14,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262592782] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:34:14,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645973477] [2021-06-05 04:34:14,738 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:34:14,766 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:34:14,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:34:14,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:34:14,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:34:14,885 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:14,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:14,886 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 19 treesize of output 15 [2021-06-05 04:34:14,887 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:14,889 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:14,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:34:14,890 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:14,911 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:34:14,913 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:14,914 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:14,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:34:14,915 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:34:14,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:14,917 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 13 treesize of output 9 [2021-06-05 04:34:14,919 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:34:14,939 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:34:14,940 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 04:34:14,940 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:35 [2021-06-05 04:34:15,028 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 04:34:15,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [645973477] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:34:15,028 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:34:15,028 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-05 04:34:15,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499052393] [2021-06-05 04:34:15,029 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 04:34:15,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:34:15,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 04:34:15,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:34:15,029 INFO L87 Difference]: Start difference. First operand 123 states and 262 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:15,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:34:15,347 INFO L93 Difference]: Finished difference Result 153 states and 315 transitions. [2021-06-05 04:34:15,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:34:15,347 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:34:15,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:34:15,347 INFO L225 Difference]: With dead ends: 153 [2021-06-05 04:34:15,347 INFO L226 Difference]: Without dead ends: 139 [2021-06-05 04:34:15,347 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 486.4ms TimeCoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:34:15,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-06-05 04:34:15,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 126. [2021-06-05 04:34:15,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 2.176) internal successors, (272), 125 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:15,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 272 transitions. [2021-06-05 04:34:15,349 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 272 transitions. Word has length 18 [2021-06-05 04:34:15,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:34:15,349 INFO L482 AbstractCegarLoop]: Abstraction has 126 states and 272 transitions. [2021-06-05 04:34:15,349 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 04:34:15,349 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 272 transitions. [2021-06-05 04:34:15,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:34:15,349 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:34:15,349 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:34:15,549 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 235 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1357 [2021-06-05 04:34:15,550 INFO L430 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:34:15,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:34:15,550 INFO L82 PathProgramCache]: Analyzing trace with hash 1345362406, now seen corresponding path program 235 times [2021-06-05 04:34:15,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:34:15,550 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272567235] [2021-06-05 04:34:15,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:34:15,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:34:15,713 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:34:15,714 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:34:15,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272567235] [2021-06-05 04:34:15,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272567235] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:34:15,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781526019] [2021-06-05 04:34:15,714 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 04:34:15,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:34:15,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 04:34:15,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:34:15,875 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:15,876 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:15,876 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 19 treesize of output 15 [2021-06-05 04:34:15,876 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:15,879 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:15,879 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:15,880 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 19 treesize of output 15 [2021-06-05 04:34:15,880 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:15,883 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:15,883 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:15,883 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 19 treesize of output 15 [2021-06-05 04:34:15,884 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:15,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:15,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:34:15,887 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:15,941 INFO L628 ElimStorePlain]: treesize reduction 80, result has 44.4 percent of original size [2021-06-05 04:34:15,944 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:15,944 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:15,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:34:15,947 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:34:15,949 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:15,949 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 10 treesize of output 6 [2021-06-05 04:34:15,950 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:34:15,973 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:34:15,974 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 04:34:15,974 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:173, output treesize:38 [2021-06-05 04:34:16,054 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:34:16,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [781526019] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:34:16,054 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:34:16,054 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-06-05 04:34:16,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037039933] [2021-06-05 04:34:16,054 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:34:16,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:34:16,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:34:16,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:34:16,055 INFO L87 Difference]: Start difference. First operand 126 states and 272 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:16,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:34:16,334 INFO L93 Difference]: Finished difference Result 157 states and 332 transitions. [2021-06-05 04:34:16,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:34:16,335 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:34:16,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:34:16,335 INFO L225 Difference]: With dead ends: 157 [2021-06-05 04:34:16,335 INFO L226 Difference]: Without dead ends: 145 [2021-06-05 04:34:16,335 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 427.9ms TimeCoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:34:16,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-06-05 04:34:16,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 131. [2021-06-05 04:34:16,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 130 states have (on average 2.1846153846153844) internal successors, (284), 130 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:16,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 284 transitions. [2021-06-05 04:34:16,336 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 284 transitions. Word has length 18 [2021-06-05 04:34:16,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:34:16,337 INFO L482 AbstractCegarLoop]: Abstraction has 131 states and 284 transitions. [2021-06-05 04:34:16,337 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 04:34:16,337 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 284 transitions. [2021-06-05 04:34:16,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:34:16,337 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:34:16,337 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:34:16,537 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1362,236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:34:16,537 INFO L430 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:34:16,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:34:16,537 INFO L82 PathProgramCache]: Analyzing trace with hash -726850258, now seen corresponding path program 236 times [2021-06-05 04:34:16,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:34:16,538 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396499323] [2021-06-05 04:34:16,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:34:16,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:34:16,718 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:34:16,719 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:34:16,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396499323] [2021-06-05 04:34:16,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396499323] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:34:16,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648431824] [2021-06-05 04:34:16,719 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:34:16,743 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:34:16,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:34:16,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 04:34:16,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:34:16,882 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:16,883 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:16,883 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 27 treesize of output 21 [2021-06-05 04:34:16,884 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:16,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:16,886 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 27 treesize of output 21 [2021-06-05 04:34:16,887 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:16,908 INFO L628 ElimStorePlain]: treesize reduction 42, result has 39.1 percent of original size [2021-06-05 04:34:16,910 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:16,910 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 10 treesize of output 6 [2021-06-05 04:34:16,912 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:34:16,918 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:34:16,919 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 04:34:16,919 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-06-05 04:34:16,959 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:34:16,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1648431824] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:34:16,959 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:34:16,959 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-05 04:34:16,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910369373] [2021-06-05 04:34:16,959 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 04:34:16,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:34:16,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 04:34:16,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:34:16,960 INFO L87 Difference]: Start difference. First operand 131 states and 284 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:17,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:34:17,128 INFO L93 Difference]: Finished difference Result 154 states and 320 transitions. [2021-06-05 04:34:17,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:34:17,129 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:34:17,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:34:17,129 INFO L225 Difference]: With dead ends: 154 [2021-06-05 04:34:17,129 INFO L226 Difference]: Without dead ends: 135 [2021-06-05 04:34:17,129 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 338.8ms TimeCoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:34:17,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-06-05 04:34:17,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 132. [2021-06-05 04:34:17,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 2.183206106870229) internal successors, (286), 131 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:17,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 286 transitions. [2021-06-05 04:34:17,131 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 286 transitions. Word has length 18 [2021-06-05 04:34:17,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:34:17,131 INFO L482 AbstractCegarLoop]: Abstraction has 132 states and 286 transitions. [2021-06-05 04:34:17,131 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 04:34:17,131 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 286 transitions. [2021-06-05 04:34:17,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:34:17,132 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:34:17,132 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:34:17,353 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 237 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1365 [2021-06-05 04:34:17,353 INFO L430 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:34:17,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:34:17,353 INFO L82 PathProgramCache]: Analyzing trace with hash 225502950, now seen corresponding path program 237 times [2021-06-05 04:34:17,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:34:17,353 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902901423] [2021-06-05 04:34:17,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:34:17,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:34:17,544 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 04:34:17,545 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:34:17,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902901423] [2021-06-05 04:34:17,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902901423] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:34:17,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173039566] [2021-06-05 04:34:17,545 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 04:34:17,569 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:34:17,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:34:17,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 04:34:17,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:34:17,719 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:17,719 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:17,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 04:34:17,720 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:17,722 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:17,723 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 27 treesize of output 21 [2021-06-05 04:34:17,724 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:17,745 INFO L628 ElimStorePlain]: treesize reduction 42, result has 39.1 percent of original size [2021-06-05 04:34:17,747 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:17,747 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 10 treesize of output 6 [2021-06-05 04:34:17,748 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:34:17,755 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:34:17,756 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 04:34:17,756 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-06-05 04:34:17,796 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:34:17,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1173039566] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:34:17,797 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:34:17,797 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-05 04:34:17,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707381950] [2021-06-05 04:34:17,797 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 04:34:17,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:34:17,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 04:34:17,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:34:17,797 INFO L87 Difference]: Start difference. First operand 132 states and 286 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:18,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:34:18,001 INFO L93 Difference]: Finished difference Result 152 states and 317 transitions. [2021-06-05 04:34:18,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:34:18,001 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:34:18,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:34:18,002 INFO L225 Difference]: With dead ends: 152 [2021-06-05 04:34:18,002 INFO L226 Difference]: Without dead ends: 136 [2021-06-05 04:34:18,002 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 388.0ms TimeCoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:34:18,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-06-05 04:34:18,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 133. [2021-06-05 04:34:18,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 2.1818181818181817) internal successors, (288), 132 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:18,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 288 transitions. [2021-06-05 04:34:18,003 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 288 transitions. Word has length 18 [2021-06-05 04:34:18,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:34:18,003 INFO L482 AbstractCegarLoop]: Abstraction has 133 states and 288 transitions. [2021-06-05 04:34:18,003 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 04:34:18,003 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 288 transitions. [2021-06-05 04:34:18,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:34:18,003 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:34:18,003 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:34:18,204 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1366,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:34:18,204 INFO L430 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:34:18,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:34:18,204 INFO L82 PathProgramCache]: Analyzing trace with hash 1087508014, now seen corresponding path program 238 times [2021-06-05 04:34:18,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:34:18,204 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112973507] [2021-06-05 04:34:18,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:34:18,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:34:18,387 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:34:18,387 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:34:18,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112973507] [2021-06-05 04:34:18,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112973507] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:34:18,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307429188] [2021-06-05 04:34:18,387 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:34:18,412 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:34:18,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:34:18,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 04:34:18,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:34:18,569 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:18,569 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:18,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 04:34:18,570 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:18,572 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:18,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 04:34:18,573 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:18,595 INFO L628 ElimStorePlain]: treesize reduction 36, result has 47.8 percent of original size [2021-06-05 04:34:18,596 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:18,597 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 21 treesize of output 13 [2021-06-05 04:34:18,597 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:18,604 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:34:18,605 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 04:34:18,605 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-06-05 04:34:18,650 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:34:18,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1307429188] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:34:18,650 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:34:18,650 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-05 04:34:18,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841804865] [2021-06-05 04:34:18,650 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 04:34:18,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:34:18,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 04:34:18,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:34:18,651 INFO L87 Difference]: Start difference. First operand 133 states and 288 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:18,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:34:18,974 INFO L93 Difference]: Finished difference Result 154 states and 325 transitions. [2021-06-05 04:34:18,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:34:18,974 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:34:18,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:34:18,974 INFO L225 Difference]: With dead ends: 154 [2021-06-05 04:34:18,974 INFO L226 Difference]: Without dead ends: 141 [2021-06-05 04:34:18,975 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 449.5ms TimeCoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:34:18,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-06-05 04:34:18,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 134. [2021-06-05 04:34:18,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 2.180451127819549) internal successors, (290), 133 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:18,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 290 transitions. [2021-06-05 04:34:18,976 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 290 transitions. Word has length 18 [2021-06-05 04:34:18,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:34:18,976 INFO L482 AbstractCegarLoop]: Abstraction has 134 states and 290 transitions. [2021-06-05 04:34:18,976 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 04:34:18,976 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 290 transitions. [2021-06-05 04:34:18,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:34:18,976 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:34:18,976 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:34:19,176 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 239 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1367 [2021-06-05 04:34:19,177 INFO L430 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:34:19,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:34:19,177 INFO L82 PathProgramCache]: Analyzing trace with hash -2071274010, now seen corresponding path program 239 times [2021-06-05 04:34:19,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:34:19,177 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138004989] [2021-06-05 04:34:19,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:34:19,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:34:19,376 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 04:34:19,376 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:34:19,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138004989] [2021-06-05 04:34:19,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138004989] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:34:19,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1496463035] [2021-06-05 04:34:19,376 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:34:19,401 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:34:19,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:34:19,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 04:34:19,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:34:19,535 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:19,535 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:19,536 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 19 treesize of output 15 [2021-06-05 04:34:19,536 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:19,539 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:19,539 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:19,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:34:19,540 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:19,542 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:19,543 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:19,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:34:19,544 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:19,546 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:19,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:34:19,547 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:19,601 INFO L628 ElimStorePlain]: treesize reduction 80, result has 44.4 percent of original size [2021-06-05 04:34:19,604 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:19,604 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:19,604 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 10 treesize of output 6 [2021-06-05 04:34:19,605 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:34:19,608 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:19,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:34:19,609 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:34:19,632 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:34:19,632 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:34:19,633 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:173, output treesize:38 [2021-06-05 04:34:19,714 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 04:34:19,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1496463035] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:34:19,715 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:34:19,715 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-05 04:34:19,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630580121] [2021-06-05 04:34:19,715 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 04:34:19,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:34:19,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 04:34:19,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:34:19,715 INFO L87 Difference]: Start difference. First operand 134 states and 290 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:20,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:34:20,095 INFO L93 Difference]: Finished difference Result 175 states and 356 transitions. [2021-06-05 04:34:20,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:34:20,095 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:34:20,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:34:20,095 INFO L225 Difference]: With dead ends: 175 [2021-06-05 04:34:20,095 INFO L226 Difference]: Without dead ends: 156 [2021-06-05 04:34:20,095 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 540.0ms TimeCoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:34:20,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-06-05 04:34:20,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 132. [2021-06-05 04:34:20,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 2.183206106870229) internal successors, (286), 131 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:20,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 286 transitions. [2021-06-05 04:34:20,097 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 286 transitions. Word has length 18 [2021-06-05 04:34:20,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:34:20,097 INFO L482 AbstractCegarLoop]: Abstraction has 132 states and 286 transitions. [2021-06-05 04:34:20,097 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 04:34:20,097 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 286 transitions. [2021-06-05 04:34:20,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:34:20,097 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:34:20,097 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:34:20,297 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 240 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1368 [2021-06-05 04:34:20,298 INFO L430 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:34:20,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:34:20,298 INFO L82 PathProgramCache]: Analyzing trace with hash -660295330, now seen corresponding path program 240 times [2021-06-05 04:34:20,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:34:20,298 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138750277] [2021-06-05 04:34:20,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:34:20,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:34:20,448 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:34:20,448 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:34:20,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138750277] [2021-06-05 04:34:20,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138750277] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:34:20,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523039188] [2021-06-05 04:34:20,448 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:34:20,488 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:34:20,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:34:20,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:34:20,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:34:20,655 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:20,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 04:34:20,657 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:20,664 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:34:20,666 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:20,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:34:20,674 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:34:20,683 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:34:20,684 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 04:34:20,684 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:38, output treesize:13 [2021-06-05 04:34:20,730 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 04:34:20,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1523039188] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:34:20,730 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:34:20,730 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-05 04:34:20,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878708791] [2021-06-05 04:34:20,730 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 04:34:20,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:34:20,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 04:34:20,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:34:20,731 INFO L87 Difference]: Start difference. First operand 132 states and 286 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:20,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:34:20,972 INFO L93 Difference]: Finished difference Result 153 states and 322 transitions. [2021-06-05 04:34:20,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:34:20,973 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:34:20,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:34:20,973 INFO L225 Difference]: With dead ends: 153 [2021-06-05 04:34:20,973 INFO L226 Difference]: Without dead ends: 146 [2021-06-05 04:34:20,973 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 369.6ms TimeCoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:34:20,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-06-05 04:34:20,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 134. [2021-06-05 04:34:20,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 2.18796992481203) internal successors, (291), 133 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:20,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 291 transitions. [2021-06-05 04:34:20,976 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 291 transitions. Word has length 18 [2021-06-05 04:34:20,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:34:20,977 INFO L482 AbstractCegarLoop]: Abstraction has 134 states and 291 transitions. [2021-06-05 04:34:20,977 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 04:34:20,977 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 291 transitions. [2021-06-05 04:34:20,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:34:20,977 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:34:20,977 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:34:21,196 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1371,241 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:34:21,197 INFO L430 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:34:21,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:34:21,197 INFO L82 PathProgramCache]: Analyzing trace with hash 201709734, now seen corresponding path program 241 times [2021-06-05 04:34:21,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:34:21,197 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116751081] [2021-06-05 04:34:21,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:34:21,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:34:21,377 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 04:34:21,377 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:34:21,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116751081] [2021-06-05 04:34:21,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116751081] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:34:21,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [355826401] [2021-06-05 04:34:21,378 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:34:21,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:34:21,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 04:34:21,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:34:21,541 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:21,542 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:21,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 04:34:21,544 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:21,546 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:21,546 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 27 treesize of output 21 [2021-06-05 04:34:21,547 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:21,569 INFO L628 ElimStorePlain]: treesize reduction 42, result has 44.0 percent of original size [2021-06-05 04:34:21,571 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:21,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 04:34:21,572 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:21,578 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:34:21,579 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:34:21,579 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-06-05 04:34:21,632 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:34:21,632 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [355826401] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:34:21,632 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:34:21,632 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-06-05 04:34:21,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111920517] [2021-06-05 04:34:21,632 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:34:21,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:34:21,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:34:21,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:34:21,633 INFO L87 Difference]: Start difference. First operand 134 states and 291 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:21,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:34:21,927 INFO L93 Difference]: Finished difference Result 163 states and 341 transitions. [2021-06-05 04:34:21,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:34:21,927 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:34:21,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:34:21,927 INFO L225 Difference]: With dead ends: 163 [2021-06-05 04:34:21,927 INFO L226 Difference]: Without dead ends: 150 [2021-06-05 04:34:21,927 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 439.1ms TimeCoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:34:21,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-06-05 04:34:21,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 135. [2021-06-05 04:34:21,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 2.1865671641791047) internal successors, (293), 134 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:21,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 293 transitions. [2021-06-05 04:34:21,929 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 293 transitions. Word has length 18 [2021-06-05 04:34:21,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:34:21,929 INFO L482 AbstractCegarLoop]: Abstraction has 135 states and 293 transitions. [2021-06-05 04:34:21,929 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 04:34:21,929 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 293 transitions. [2021-06-05 04:34:21,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:34:21,929 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:34:21,929 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:34:22,129 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1372,242 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:34:22,130 INFO L430 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:34:22,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:34:22,130 INFO L82 PathProgramCache]: Analyzing trace with hash 1337895006, now seen corresponding path program 242 times [2021-06-05 04:34:22,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:34:22,130 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159709665] [2021-06-05 04:34:22,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:34:22,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:34:22,300 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:34:22,300 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:34:22,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159709665] [2021-06-05 04:34:22,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159709665] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:34:22,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839769339] [2021-06-05 04:34:22,301 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:34:22,325 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:34:22,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:34:22,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 04:34:22,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:34:22,442 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:22,442 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:22,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:34:22,443 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:22,446 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:22,446 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:22,446 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 19 treesize of output 15 [2021-06-05 04:34:22,447 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:22,449 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:22,450 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:22,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:34:22,451 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:22,453 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:22,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:34:22,454 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:22,506 INFO L628 ElimStorePlain]: treesize reduction 77, result has 46.5 percent of original size [2021-06-05 04:34:22,509 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:22,509 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:22,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:34:22,511 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:34:22,513 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:22,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 04:34:22,514 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:34:22,536 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:34:22,537 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 04:34:22,538 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:173, output treesize:38 [2021-06-05 04:34:22,609 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 04:34:22,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1839769339] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:34:22,609 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:34:22,609 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-06-05 04:34:22,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410789173] [2021-06-05 04:34:22,609 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:34:22,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:34:22,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:34:22,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:34:22,609 INFO L87 Difference]: Start difference. First operand 135 states and 293 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:22,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:34:22,978 INFO L93 Difference]: Finished difference Result 184 states and 372 transitions. [2021-06-05 04:34:22,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:34:22,978 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:34:22,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:34:22,978 INFO L225 Difference]: With dead ends: 184 [2021-06-05 04:34:22,978 INFO L226 Difference]: Without dead ends: 165 [2021-06-05 04:34:22,978 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 490.8ms TimeCoverageRelationStatistics Valid=90, Invalid=560, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:34:22,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-06-05 04:34:22,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 133. [2021-06-05 04:34:22,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 2.1818181818181817) internal successors, (288), 132 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:22,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 288 transitions. [2021-06-05 04:34:22,980 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 288 transitions. Word has length 18 [2021-06-05 04:34:22,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:34:22,980 INFO L482 AbstractCegarLoop]: Abstraction has 133 states and 288 transitions. [2021-06-05 04:34:22,980 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 04:34:22,980 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 288 transitions. [2021-06-05 04:34:22,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:34:22,980 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:34:22,980 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:34:23,181 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1373,243 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:34:23,181 INFO L430 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:34:23,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:34:23,181 INFO L82 PathProgramCache]: Analyzing trace with hash -1905074386, now seen corresponding path program 243 times [2021-06-05 04:34:23,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:34:23,181 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613453405] [2021-06-05 04:34:23,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:34:23,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:34:23,337 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:34:23,337 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:34:23,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613453405] [2021-06-05 04:34:23,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613453405] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:34:23,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230104970] [2021-06-05 04:34:23,337 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:34:23,362 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:34:23,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:34:23,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 04:34:23,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:34:23,487 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:23,488 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:23,488 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 27 treesize of output 21 [2021-06-05 04:34:23,489 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:23,491 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:23,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 04:34:23,492 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:23,513 INFO L628 ElimStorePlain]: treesize reduction 42, result has 39.1 percent of original size [2021-06-05 04:34:23,514 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:23,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:34:23,516 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:34:23,522 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:34:23,523 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:34:23,523 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-06-05 04:34:23,556 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:34:23,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [230104970] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:34:23,556 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:34:23,556 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-06-05 04:34:23,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259894922] [2021-06-05 04:34:23,556 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:34:23,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:34:23,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:34:23,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:34:23,557 INFO L87 Difference]: Start difference. First operand 133 states and 288 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:23,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:34:23,828 INFO L93 Difference]: Finished difference Result 156 states and 329 transitions. [2021-06-05 04:34:23,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:34:23,828 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:34:23,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:34:23,828 INFO L225 Difference]: With dead ends: 156 [2021-06-05 04:34:23,828 INFO L226 Difference]: Without dead ends: 143 [2021-06-05 04:34:23,828 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 337.4ms TimeCoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:34:23,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-06-05 04:34:23,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 135. [2021-06-05 04:34:23,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 2.1791044776119404) internal successors, (292), 134 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:23,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 292 transitions. [2021-06-05 04:34:23,830 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 292 transitions. Word has length 18 [2021-06-05 04:34:23,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:34:23,830 INFO L482 AbstractCegarLoop]: Abstraction has 135 states and 292 transitions. [2021-06-05 04:34:23,830 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 04:34:23,830 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 292 transitions. [2021-06-05 04:34:23,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:34:23,830 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:34:23,830 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:34:24,031 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 244 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1376 [2021-06-05 04:34:24,031 INFO L430 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:34:24,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:34:24,031 INFO L82 PathProgramCache]: Analyzing trace with hash -768889114, now seen corresponding path program 244 times [2021-06-05 04:34:24,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:34:24,031 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993066790] [2021-06-05 04:34:24,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:34:24,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:34:24,198 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:34:24,198 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:34:24,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993066790] [2021-06-05 04:34:24,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993066790] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:34:24,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736114026] [2021-06-05 04:34:24,198 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:34:24,222 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:34:24,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:34:24,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 04:34:24,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:34:24,324 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:24,325 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:24,325 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 19 treesize of output 15 [2021-06-05 04:34:24,326 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:24,328 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:24,329 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:24,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:34:24,330 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:24,332 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:24,332 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:24,333 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 19 treesize of output 15 [2021-06-05 04:34:24,333 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:24,336 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:24,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:34:24,337 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:24,390 INFO L628 ElimStorePlain]: treesize reduction 80, result has 44.4 percent of original size [2021-06-05 04:34:24,392 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:24,392 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:24,393 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 10 treesize of output 6 [2021-06-05 04:34:24,394 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:34:24,396 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:24,396 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 10 treesize of output 6 [2021-06-05 04:34:24,397 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:34:24,420 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:34:24,421 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 04:34:24,421 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:173, output treesize:38 [2021-06-05 04:34:24,496 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 04:34:24,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [736114026] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:34:24,496 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:34:24,496 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-06-05 04:34:24,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840594870] [2021-06-05 04:34:24,496 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:34:24,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:34:24,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:34:24,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:34:24,496 INFO L87 Difference]: Start difference. First operand 135 states and 292 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:24,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:34:24,856 INFO L93 Difference]: Finished difference Result 176 states and 358 transitions. [2021-06-05 04:34:24,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:34:24,857 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:34:24,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:34:24,857 INFO L225 Difference]: With dead ends: 176 [2021-06-05 04:34:24,857 INFO L226 Difference]: Without dead ends: 157 [2021-06-05 04:34:24,857 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 442.8ms TimeCoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:34:24,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-06-05 04:34:24,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 134. [2021-06-05 04:34:24,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 2.180451127819549) internal successors, (290), 133 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:24,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 290 transitions. [2021-06-05 04:34:24,858 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 290 transitions. Word has length 18 [2021-06-05 04:34:24,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:34:24,858 INFO L482 AbstractCegarLoop]: Abstraction has 134 states and 290 transitions. [2021-06-05 04:34:24,858 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 04:34:24,859 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 290 transitions. [2021-06-05 04:34:24,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:34:24,859 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:34:24,859 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:34:25,060 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1377 [2021-06-05 04:34:25,061 INFO L430 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:34:25,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:34:25,061 INFO L82 PathProgramCache]: Analyzing trace with hash 1379907422, now seen corresponding path program 245 times [2021-06-05 04:34:25,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:34:25,061 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038536907] [2021-06-05 04:34:25,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:34:25,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:34:25,207 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:34:25,207 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:34:25,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038536907] [2021-06-05 04:34:25,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038536907] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:34:25,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668888856] [2021-06-05 04:34:25,207 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:34:25,234 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:34:25,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:34:25,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 04:34:25,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:34:25,351 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:25,352 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:25,352 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 19 treesize of output 15 [2021-06-05 04:34:25,353 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:25,355 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:25,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:34:25,356 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:25,418 INFO L628 ElimStorePlain]: treesize reduction 88, result has 46.0 percent of original size [2021-06-05 04:34:25,420 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:25,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 04:34:25,422 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:34:25,445 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:34:25,447 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:25,447 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 19 treesize of output 15 [2021-06-05 04:34:25,448 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:25,470 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:34:25,472 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:25,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:34:25,473 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:34:25,494 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:34:25,495 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 04:34:25,495 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-06-05 04:34:25,567 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:34:25,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1668888856] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:34:25,568 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:34:25,568 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-05 04:34:25,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459865583] [2021-06-05 04:34:25,568 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 04:34:25,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:34:25,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 04:34:25,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:34:25,568 INFO L87 Difference]: Start difference. First operand 134 states and 290 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:25,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:34:25,764 INFO L93 Difference]: Finished difference Result 173 states and 361 transitions. [2021-06-05 04:34:25,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:34:25,765 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:34:25,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:34:25,765 INFO L225 Difference]: With dead ends: 173 [2021-06-05 04:34:25,765 INFO L226 Difference]: Without dead ends: 154 [2021-06-05 04:34:25,765 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 340.5ms TimeCoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:34:25,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-06-05 04:34:25,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 136. [2021-06-05 04:34:25,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 2.185185185185185) internal successors, (295), 135 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:25,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 295 transitions. [2021-06-05 04:34:25,766 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 295 transitions. Word has length 18 [2021-06-05 04:34:25,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:34:25,767 INFO L482 AbstractCegarLoop]: Abstraction has 136 states and 295 transitions. [2021-06-05 04:34:25,767 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 04:34:25,767 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 295 transitions. [2021-06-05 04:34:25,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:34:25,767 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:34:25,767 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:34:25,967 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1380,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:34:25,967 INFO L430 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:34:25,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:34:25,968 INFO L82 PathProgramCache]: Analyzing trace with hash 1944729062, now seen corresponding path program 246 times [2021-06-05 04:34:25,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:34:25,968 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595376446] [2021-06-05 04:34:25,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:34:25,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:34:26,101 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:34:26,101 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:34:26,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595376446] [2021-06-05 04:34:26,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595376446] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:34:26,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545220059] [2021-06-05 04:34:26,102 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 04:34:26,126 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:34:26,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:34:26,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:34:26,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:34:26,253 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:26,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 04:34:26,255 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:26,261 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:34:26,262 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:26,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 04:34:26,263 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:26,269 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:34:26,269 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 04:34:26,269 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:38, output treesize:13 [2021-06-05 04:34:26,305 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:34:26,305 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [545220059] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:34:26,305 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:34:26,305 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-05 04:34:26,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126456195] [2021-06-05 04:34:26,306 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 04:34:26,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:34:26,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 04:34:26,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:34:26,306 INFO L87 Difference]: Start difference. First operand 136 states and 295 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:26,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:34:26,515 INFO L93 Difference]: Finished difference Result 158 states and 333 transitions. [2021-06-05 04:34:26,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:34:26,516 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:34:26,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:34:26,516 INFO L225 Difference]: With dead ends: 158 [2021-06-05 04:34:26,516 INFO L226 Difference]: Without dead ends: 151 [2021-06-05 04:34:26,516 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 310.8ms TimeCoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:34:26,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-06-05 04:34:26,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 139. [2021-06-05 04:34:26,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 2.1884057971014492) internal successors, (302), 138 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:26,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 302 transitions. [2021-06-05 04:34:26,517 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 302 transitions. Word has length 18 [2021-06-05 04:34:26,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:34:26,518 INFO L482 AbstractCegarLoop]: Abstraction has 139 states and 302 transitions. [2021-06-05 04:34:26,518 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 04:34:26,518 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 302 transitions. [2021-06-05 04:34:26,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:34:26,518 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:34:26,518 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:34:26,718 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 247 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1385 [2021-06-05 04:34:26,718 INFO L430 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:34:26,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:34:26,719 INFO L82 PathProgramCache]: Analyzing trace with hash -1488233170, now seen corresponding path program 247 times [2021-06-05 04:34:26,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:34:26,719 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753203721] [2021-06-05 04:34:26,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:34:26,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:34:26,876 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:34:26,876 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:34:26,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753203721] [2021-06-05 04:34:26,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753203721] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:34:26,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658437234] [2021-06-05 04:34:26,877 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 04:34:26,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:34:26,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 04:34:26,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:34:27,038 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:27,038 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:27,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 04:34:27,039 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:27,041 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:27,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 04:34:27,042 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:27,063 INFO L628 ElimStorePlain]: treesize reduction 42, result has 39.1 percent of original size [2021-06-05 04:34:27,065 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:27,065 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 10 treesize of output 6 [2021-06-05 04:34:27,067 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:34:27,073 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:34:27,074 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 04:34:27,074 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-06-05 04:34:27,111 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:34:27,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [658437234] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:34:27,111 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:34:27,112 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-05 04:34:27,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116009453] [2021-06-05 04:34:27,112 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 04:34:27,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:34:27,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 04:34:27,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:34:27,112 INFO L87 Difference]: Start difference. First operand 139 states and 302 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:27,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:34:27,459 INFO L93 Difference]: Finished difference Result 168 states and 352 transitions. [2021-06-05 04:34:27,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:34:27,460 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:34:27,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:34:27,460 INFO L225 Difference]: With dead ends: 168 [2021-06-05 04:34:27,460 INFO L226 Difference]: Without dead ends: 155 [2021-06-05 04:34:27,460 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 434.4ms TimeCoverageRelationStatistics Valid=83, Invalid=567, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:34:27,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-06-05 04:34:27,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 140. [2021-06-05 04:34:27,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 2.1870503597122304) internal successors, (304), 139 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:27,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 304 transitions. [2021-06-05 04:34:27,461 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 304 transitions. Word has length 18 [2021-06-05 04:34:27,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:34:27,461 INFO L482 AbstractCegarLoop]: Abstraction has 140 states and 304 transitions. [2021-06-05 04:34:27,462 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 04:34:27,462 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 304 transitions. [2021-06-05 04:34:27,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:34:27,462 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:34:27,462 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:34:27,662 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 248 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1386 [2021-06-05 04:34:27,662 INFO L430 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:34:27,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:34:27,663 INFO L82 PathProgramCache]: Analyzing trace with hash -352047898, now seen corresponding path program 248 times [2021-06-05 04:34:27,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:34:27,663 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468727192] [2021-06-05 04:34:27,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:34:27,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:34:27,831 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:34:27,831 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:34:27,831 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468727192] [2021-06-05 04:34:27,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468727192] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:34:27,831 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230818115] [2021-06-05 04:34:27,831 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:34:27,855 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:34:27,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:34:27,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 04:34:27,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:34:27,970 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:27,970 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:27,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:34:27,971 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:27,974 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:27,974 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:27,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:34:27,975 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:27,977 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:27,978 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:27,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:34:27,978 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:27,981 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:27,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:34:27,982 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:28,035 INFO L628 ElimStorePlain]: treesize reduction 77, result has 45.4 percent of original size [2021-06-05 04:34:28,038 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:28,038 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:28,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:34:28,040 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:34:28,042 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:28,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:34:28,043 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:34:28,066 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:34:28,067 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 04:34:28,067 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:173, output treesize:38 [2021-06-05 04:34:28,138 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:34:28,138 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [230818115] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:34:28,138 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:34:28,138 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-06-05 04:34:28,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809716766] [2021-06-05 04:34:28,138 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:34:28,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:34:28,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:34:28,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:34:28,139 INFO L87 Difference]: Start difference. First operand 140 states and 304 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:28,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:34:28,596 INFO L93 Difference]: Finished difference Result 188 states and 381 transitions. [2021-06-05 04:34:28,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:34:28,596 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:34:28,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:34:28,597 INFO L225 Difference]: With dead ends: 188 [2021-06-05 04:34:28,597 INFO L226 Difference]: Without dead ends: 169 [2021-06-05 04:34:28,597 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 524.3ms TimeCoverageRelationStatistics Valid=94, Invalid=608, Unknown=0, NotChecked=0, Total=702 [2021-06-05 04:34:28,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-06-05 04:34:28,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 138. [2021-06-05 04:34:28,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 2.1824817518248176) internal successors, (299), 137 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:28,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 299 transitions. [2021-06-05 04:34:28,598 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 299 transitions. Word has length 18 [2021-06-05 04:34:28,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:34:28,598 INFO L482 AbstractCegarLoop]: Abstraction has 138 states and 299 transitions. [2021-06-05 04:34:28,598 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 04:34:28,598 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 299 transitions. [2021-06-05 04:34:28,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:34:28,598 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:34:28,599 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:34:28,799 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 249 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1387 [2021-06-05 04:34:28,799 INFO L430 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:34:28,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:34:28,799 INFO L82 PathProgramCache]: Analyzing trace with hash 699950006, now seen corresponding path program 249 times [2021-06-05 04:34:28,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:34:28,800 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128294757] [2021-06-05 04:34:28,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:34:28,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:34:28,963 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 04:34:28,963 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:34:28,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128294757] [2021-06-05 04:34:28,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128294757] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:34:28,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1910173148] [2021-06-05 04:34:28,963 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:34:28,988 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:34:28,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:34:28,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 04:34:28,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:34:29,107 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:29,108 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:29,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 04:34:29,109 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:29,114 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:29,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 04:34:29,115 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:29,137 INFO L628 ElimStorePlain]: treesize reduction 48, result has 36.0 percent of original size [2021-06-05 04:34:29,139 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:29,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:34:29,140 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:34:29,147 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:34:29,147 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 04:34:29,148 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-06-05 04:34:29,180 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 04:34:29,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1910173148] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:34:29,180 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:34:29,180 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-06-05 04:34:29,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454314568] [2021-06-05 04:34:29,180 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:34:29,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:34:29,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:34:29,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:34:29,181 INFO L87 Difference]: Start difference. First operand 138 states and 299 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:29,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:34:29,386 INFO L93 Difference]: Finished difference Result 159 states and 336 transitions. [2021-06-05 04:34:29,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:34:29,387 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:34:29,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:34:29,387 INFO L225 Difference]: With dead ends: 159 [2021-06-05 04:34:29,387 INFO L226 Difference]: Without dead ends: 146 [2021-06-05 04:34:29,387 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 367.6ms TimeCoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:34:29,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-06-05 04:34:29,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 140. [2021-06-05 04:34:29,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 2.179856115107914) internal successors, (303), 139 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:29,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 303 transitions. [2021-06-05 04:34:29,389 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 303 transitions. Word has length 18 [2021-06-05 04:34:29,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:34:29,389 INFO L482 AbstractCegarLoop]: Abstraction has 140 states and 303 transitions. [2021-06-05 04:34:29,389 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 04:34:29,389 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 303 transitions. [2021-06-05 04:34:29,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:34:29,389 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:34:29,389 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:34:29,592 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 250 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1390 [2021-06-05 04:34:29,593 INFO L430 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:34:29,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:34:29,593 INFO L82 PathProgramCache]: Analyzing trace with hash 1836135278, now seen corresponding path program 250 times [2021-06-05 04:34:29,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:34:29,593 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864237781] [2021-06-05 04:34:29,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:34:29,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:34:29,727 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 04:34:29,727 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:34:29,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864237781] [2021-06-05 04:34:29,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864237781] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:34:29,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61518473] [2021-06-05 04:34:29,727 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 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 04:34:29,753 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:34:29,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:34:29,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 04:34:29,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:34:29,849 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:29,850 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:29,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:34:29,851 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:29,853 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:29,854 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:29,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:34:29,854 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:29,857 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:29,857 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:29,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:34:29,858 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:29,861 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:29,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:34:29,861 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:29,916 INFO L628 ElimStorePlain]: treesize reduction 83, result has 45.8 percent of original size [2021-06-05 04:34:29,918 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:29,919 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:29,919 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 13 treesize of output 9 [2021-06-05 04:34:29,920 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:34:29,922 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:29,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 04:34:29,924 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:34:29,946 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:34:29,947 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 04:34:29,948 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:173, output treesize:38 [2021-06-05 04:34:30,016 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:34:30,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [61518473] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:34:30,016 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:34:30,016 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-06-05 04:34:30,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356019613] [2021-06-05 04:34:30,016 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:34:30,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:34:30,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:34:30,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:34:30,017 INFO L87 Difference]: Start difference. First operand 140 states and 303 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:30,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:34:30,278 INFO L93 Difference]: Finished difference Result 156 states and 328 transitions. [2021-06-05 04:34:30,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:34:30,279 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:34:30,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:34:30,280 INFO L225 Difference]: With dead ends: 156 [2021-06-05 04:34:30,280 INFO L226 Difference]: Without dead ends: 144 [2021-06-05 04:34:30,280 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 379.7ms TimeCoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:34:30,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-06-05 04:34:30,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 139. [2021-06-05 04:34:30,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 2.181159420289855) internal successors, (301), 138 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:30,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 301 transitions. [2021-06-05 04:34:30,282 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 301 transitions. Word has length 18 [2021-06-05 04:34:30,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:34:30,282 INFO L482 AbstractCegarLoop]: Abstraction has 139 states and 301 transitions. [2021-06-05 04:34:30,282 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 04:34:30,282 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 301 transitions. [2021-06-05 04:34:30,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:34:30,282 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:34:30,282 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:34:30,488 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1391,251 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:34:30,489 INFO L430 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:34:30,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:34:30,489 INFO L82 PathProgramCache]: Analyzing trace with hash -310035482, now seen corresponding path program 251 times [2021-06-05 04:34:30,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:34:30,489 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123410683] [2021-06-05 04:34:30,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:34:30,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:34:30,629 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 04:34:30,629 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:34:30,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123410683] [2021-06-05 04:34:30,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123410683] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:34:30,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43871804] [2021-06-05 04:34:30,629 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:34:30,654 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:34:30,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:34:30,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 04:34:30,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:34:30,768 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:30,768 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:30,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:34:30,769 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:30,772 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:30,772 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 19 treesize of output 15 [2021-06-05 04:34:30,773 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:30,834 INFO L628 ElimStorePlain]: treesize reduction 85, result has 45.9 percent of original size [2021-06-05 04:34:30,837 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:30,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:34:30,838 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:30,859 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:34:30,862 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:30,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:34:30,863 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:34:30,885 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:34:30,887 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:30,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:34:30,889 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:34:30,909 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:34:30,910 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 04:34:30,910 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-06-05 04:34:30,983 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:34:30,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [43871804] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:34:30,984 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:34:30,984 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-05 04:34:30,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676168319] [2021-06-05 04:34:30,984 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 04:34:30,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:34:30,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 04:34:30,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:34:30,984 INFO L87 Difference]: Start difference. First operand 139 states and 301 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:31,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:34:31,233 INFO L93 Difference]: Finished difference Result 169 states and 359 transitions. [2021-06-05 04:34:31,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:34:31,233 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:34:31,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:34:31,233 INFO L225 Difference]: With dead ends: 169 [2021-06-05 04:34:31,233 INFO L226 Difference]: Without dead ends: 157 [2021-06-05 04:34:31,233 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 332.3ms TimeCoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:34:31,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-06-05 04:34:31,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 139. [2021-06-05 04:34:31,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 2.181159420289855) internal successors, (301), 138 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:31,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 301 transitions. [2021-06-05 04:34:31,235 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 301 transitions. Word has length 18 [2021-06-05 04:34:31,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:34:31,235 INFO L482 AbstractCegarLoop]: Abstraction has 139 states and 301 transitions. [2021-06-05 04:34:31,235 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 04:34:31,235 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 301 transitions. [2021-06-05 04:34:31,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:34:31,235 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:34:31,235 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:34:31,435 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1394,252 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:34:31,436 INFO L430 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:34:31,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:34:31,436 INFO L82 PathProgramCache]: Analyzing trace with hash -185848274, now seen corresponding path program 252 times [2021-06-05 04:34:31,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:34:31,436 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850581371] [2021-06-05 04:34:31,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:34:31,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:34:31,627 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:34:31,627 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:34:31,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850581371] [2021-06-05 04:34:31,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850581371] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:34:31,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769004120] [2021-06-05 04:34:31,627 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:34:31,652 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:34:31,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:34:31,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:34:31,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:34:31,776 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:31,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 04:34:31,777 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:31,783 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:34:31,785 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:31,785 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 21 treesize of output 13 [2021-06-05 04:34:31,786 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:31,791 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:34:31,792 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 04:34:31,792 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:38, output treesize:13 [2021-06-05 04:34:31,827 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 04:34:31,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [769004120] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:34:31,828 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:34:31,828 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-05 04:34:31,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325497727] [2021-06-05 04:34:31,828 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 04:34:31,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:34:31,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 04:34:31,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:34:31,828 INFO L87 Difference]: Start difference. First operand 139 states and 301 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:32,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:34:32,129 INFO L93 Difference]: Finished difference Result 164 states and 349 transitions. [2021-06-05 04:34:32,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:34:32,130 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:34:32,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:34:32,130 INFO L225 Difference]: With dead ends: 164 [2021-06-05 04:34:32,130 INFO L226 Difference]: Without dead ends: 157 [2021-06-05 04:34:32,130 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 389.4ms TimeCoverageRelationStatistics Valid=75, Invalid=477, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:34:32,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-06-05 04:34:32,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 142. [2021-06-05 04:34:32,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 2.1843971631205674) internal successors, (308), 141 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:32,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 308 transitions. [2021-06-05 04:34:32,132 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 308 transitions. Word has length 18 [2021-06-05 04:34:32,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:34:32,132 INFO L482 AbstractCegarLoop]: Abstraction has 142 states and 308 transitions. [2021-06-05 04:34:32,132 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 04:34:32,132 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 308 transitions. [2021-06-05 04:34:32,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:34:32,132 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:34:32,133 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:34:32,344 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 253 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1399 [2021-06-05 04:34:32,345 INFO L430 AbstractCegarLoop]: === Iteration 259 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:34:32,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:34:32,345 INFO L82 PathProgramCache]: Analyzing trace with hash 950336998, now seen corresponding path program 253 times [2021-06-05 04:34:32,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:34:32,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600184502] [2021-06-05 04:34:32,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:34:32,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:34:32,516 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 04:34:32,516 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:34:32,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600184502] [2021-06-05 04:34:32,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600184502] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:34:32,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562468111] [2021-06-05 04:34:32,516 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:34:32,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:34:32,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 04:34:32,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:34:32,641 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:32,641 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:32,641 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:34:32,642 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:32,644 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:32,645 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:32,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:34:32,646 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:32,648 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:32,648 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:32,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:34:32,657 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:32,659 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:32,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:34:32,660 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:32,713 INFO L628 ElimStorePlain]: treesize reduction 83, result has 44.7 percent of original size [2021-06-05 04:34:32,715 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:32,715 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:32,716 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 10 treesize of output 6 [2021-06-05 04:34:32,717 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:34:32,719 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:32,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 04:34:32,720 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:34:32,743 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:34:32,744 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 04:34:32,744 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:173, output treesize:38 [2021-06-05 04:34:32,817 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:34:32,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [562468111] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:34:32,818 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:34:32,818 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-05 04:34:32,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829278024] [2021-06-05 04:34:32,818 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 04:34:32,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:34:32,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 04:34:32,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:34:32,818 INFO L87 Difference]: Start difference. First operand 142 states and 308 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:33,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:34:33,032 INFO L93 Difference]: Finished difference Result 168 states and 351 transitions. [2021-06-05 04:34:33,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:34:33,033 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:34:33,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:34:33,033 INFO L225 Difference]: With dead ends: 168 [2021-06-05 04:34:33,033 INFO L226 Difference]: Without dead ends: 156 [2021-06-05 04:34:33,033 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 378.4ms TimeCoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:34:33,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-06-05 04:34:33,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 142. [2021-06-05 04:34:33,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 2.1843971631205674) internal successors, (308), 141 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:33,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 308 transitions. [2021-06-05 04:34:33,035 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 308 transitions. Word has length 18 [2021-06-05 04:34:33,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:34:33,035 INFO L482 AbstractCegarLoop]: Abstraction has 142 states and 308 transitions. [2021-06-05 04:34:33,035 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 04:34:33,035 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 308 transitions. [2021-06-05 04:34:33,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:34:33,035 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:34:33,035 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:34:33,253 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1400,254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:34:33,254 INFO L430 AbstractCegarLoop]: === Iteration 260 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:34:33,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:34:33,254 INFO L82 PathProgramCache]: Analyzing trace with hash -1195833762, now seen corresponding path program 254 times [2021-06-05 04:34:33,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:34:33,254 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247380983] [2021-06-05 04:34:33,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:34:33,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:34:33,470 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 04:34:33,471 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:34:33,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247380983] [2021-06-05 04:34:33,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247380983] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:34:33,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283829127] [2021-06-05 04:34:33,471 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:34:33,508 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:34:33,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:34:33,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 04:34:33,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:34:33,657 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:33,658 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:33,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:34:33,659 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:33,662 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:33,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:34:33,664 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:33,739 INFO L628 ElimStorePlain]: treesize reduction 88, result has 45.0 percent of original size [2021-06-05 04:34:33,742 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:33,742 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 19 treesize of output 15 [2021-06-05 04:34:33,743 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:33,770 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:34:33,774 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:33,774 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 10 treesize of output 6 [2021-06-05 04:34:33,775 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:34:33,802 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:34:33,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:33,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:34:33,807 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:34:33,830 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:34:33,831 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:34:33,831 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-06-05 04:34:33,907 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:34:33,907 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [283829127] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:34:33,907 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:34:33,907 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-05 04:34:33,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584688271] [2021-06-05 04:34:33,907 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 04:34:33,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:34:33,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 04:34:33,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:34:33,908 INFO L87 Difference]: Start difference. First operand 142 states and 308 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:34,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:34:34,438 INFO L93 Difference]: Finished difference Result 194 states and 401 transitions. [2021-06-05 04:34:34,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:34:34,438 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:34:34,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:34:34,438 INFO L225 Difference]: With dead ends: 194 [2021-06-05 04:34:34,438 INFO L226 Difference]: Without dead ends: 175 [2021-06-05 04:34:34,439 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 665.0ms TimeCoverageRelationStatistics Valid=111, Invalid=701, Unknown=0, NotChecked=0, Total=812 [2021-06-05 04:34:34,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-06-05 04:34:34,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 142. [2021-06-05 04:34:34,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 2.1843971631205674) internal successors, (308), 141 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:34,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 308 transitions. [2021-06-05 04:34:34,440 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 308 transitions. Word has length 18 [2021-06-05 04:34:34,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:34:34,440 INFO L482 AbstractCegarLoop]: Abstraction has 142 states and 308 transitions. [2021-06-05 04:34:34,440 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 04:34:34,440 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 308 transitions. [2021-06-05 04:34:34,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:34:34,440 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:34:34,440 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:34:34,641 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 255 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1403 [2021-06-05 04:34:34,641 INFO L430 AbstractCegarLoop]: === Iteration 261 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:34:34,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:34:34,641 INFO L82 PathProgramCache]: Analyzing trace with hash 992349414, now seen corresponding path program 255 times [2021-06-05 04:34:34,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:34:34,641 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404745383] [2021-06-05 04:34:34,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:34:34,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:34:34,804 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:34:34,805 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:34:34,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404745383] [2021-06-05 04:34:34,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404745383] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:34:34,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567657579] [2021-06-05 04:34:34,805 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:34:34,835 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:34:34,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:34:34,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:34:34,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:34:34,939 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:34,939 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:34,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:34:34,940 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:34,942 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:34,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:34:34,943 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:34,964 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:34:34,966 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:34,966 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:34,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:34:34,968 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:34:34,970 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:34,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 04:34:34,971 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:34:34,991 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:34:34,992 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 04:34:34,993 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:35 [2021-06-05 04:34:35,063 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:34:35,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [567657579] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:34:35,064 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:34:35,064 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-05 04:34:35,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988459796] [2021-06-05 04:34:35,064 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 04:34:35,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:34:35,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 04:34:35,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:34:35,064 INFO L87 Difference]: Start difference. First operand 142 states and 308 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:35,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:34:35,304 INFO L93 Difference]: Finished difference Result 169 states and 360 transitions. [2021-06-05 04:34:35,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:34:35,305 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:34:35,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:34:35,305 INFO L225 Difference]: With dead ends: 169 [2021-06-05 04:34:35,305 INFO L226 Difference]: Without dead ends: 162 [2021-06-05 04:34:35,305 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 341.8ms TimeCoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:34:35,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-06-05 04:34:35,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 142. [2021-06-05 04:34:35,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 2.1843971631205674) internal successors, (308), 141 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:35,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 308 transitions. [2021-06-05 04:34:35,307 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 308 transitions. Word has length 18 [2021-06-05 04:34:35,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:34:35,307 INFO L482 AbstractCegarLoop]: Abstraction has 142 states and 308 transitions. [2021-06-05 04:34:35,307 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 04:34:35,307 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 308 transitions. [2021-06-05 04:34:35,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:34:35,307 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:34:35,307 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:34:35,507 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1408,256 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:34:35,508 INFO L430 AbstractCegarLoop]: === Iteration 262 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:34:35,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:34:35,508 INFO L82 PathProgramCache]: Analyzing trace with hash 1096106590, now seen corresponding path program 256 times [2021-06-05 04:34:35,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:34:35,508 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173786266] [2021-06-05 04:34:35,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:34:35,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:34:35,659 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:34:35,659 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:34:35,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173786266] [2021-06-05 04:34:35,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173786266] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:34:35,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292575259] [2021-06-05 04:34:35,660 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:34:35,685 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:34:35,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:34:35,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 04:34:35,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:34:35,824 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:35,825 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:35,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 04:34:35,826 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:35,828 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:35,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 04:34:35,835 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:35,857 INFO L628 ElimStorePlain]: treesize reduction 42, result has 39.1 percent of original size [2021-06-05 04:34:35,858 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:35,859 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 10 treesize of output 6 [2021-06-05 04:34:35,860 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:34:35,866 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:34:35,867 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:34:35,867 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-06-05 04:34:35,904 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:34:35,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1292575259] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:34:35,905 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:34:35,905 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-05 04:34:35,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006694581] [2021-06-05 04:34:35,905 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 04:34:35,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:34:35,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 04:34:35,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:34:35,906 INFO L87 Difference]: Start difference. First operand 142 states and 308 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:36,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:34:36,153 INFO L93 Difference]: Finished difference Result 175 states and 360 transitions. [2021-06-05 04:34:36,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:34:36,153 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:34:36,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:34:36,153 INFO L225 Difference]: With dead ends: 175 [2021-06-05 04:34:36,153 INFO L226 Difference]: Without dead ends: 150 [2021-06-05 04:34:36,154 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 343.0ms TimeCoverageRelationStatistics Valid=67, Invalid=485, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:34:36,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-06-05 04:34:36,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 146. [2021-06-05 04:34:36,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 2.179310344827586) internal successors, (316), 145 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:36,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 316 transitions. [2021-06-05 04:34:36,155 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 316 transitions. Word has length 18 [2021-06-05 04:34:36,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:34:36,155 INFO L482 AbstractCegarLoop]: Abstraction has 146 states and 316 transitions. [2021-06-05 04:34:36,155 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 04:34:36,155 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 316 transitions. [2021-06-05 04:34:36,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:34:36,155 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:34:36,155 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:34:36,360 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 257 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1411 [2021-06-05 04:34:36,360 INFO L430 AbstractCegarLoop]: === Iteration 263 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:34:36,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:34:36,360 INFO L82 PathProgramCache]: Analyzing trace with hash 1958111654, now seen corresponding path program 257 times [2021-06-05 04:34:36,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:34:36,360 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224750999] [2021-06-05 04:34:36,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:34:36,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:34:36,524 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:34:36,525 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:34:36,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224750999] [2021-06-05 04:34:36,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224750999] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:34:36,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117705235] [2021-06-05 04:34:36,525 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:34:36,549 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:34:36,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:34:36,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 04:34:36,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:34:36,713 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:36,713 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:36,713 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 27 treesize of output 21 [2021-06-05 04:34:36,714 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:36,716 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:36,716 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 27 treesize of output 21 [2021-06-05 04:34:36,717 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:36,739 INFO L628 ElimStorePlain]: treesize reduction 42, result has 44.0 percent of original size [2021-06-05 04:34:36,741 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:36,741 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 21 treesize of output 13 [2021-06-05 04:34:36,742 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:36,748 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:34:36,749 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 04:34:36,749 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-06-05 04:34:36,783 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:34:36,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2117705235] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:34:36,784 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:34:36,784 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-06-05 04:34:36,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304241558] [2021-06-05 04:34:36,784 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:34:36,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:34:36,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:34:36,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:34:36,784 INFO L87 Difference]: Start difference. First operand 146 states and 316 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:37,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:34:37,139 INFO L93 Difference]: Finished difference Result 169 states and 357 transitions. [2021-06-05 04:34:37,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:34:37,140 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:34:37,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:34:37,140 INFO L225 Difference]: With dead ends: 169 [2021-06-05 04:34:37,140 INFO L226 Difference]: Without dead ends: 156 [2021-06-05 04:34:37,140 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 440.4ms TimeCoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:34:37,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-06-05 04:34:37,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 147. [2021-06-05 04:34:37,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 146 states have (on average 2.1780821917808217) internal successors, (318), 146 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:37,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 318 transitions. [2021-06-05 04:34:37,142 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 318 transitions. Word has length 18 [2021-06-05 04:34:37,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:34:37,142 INFO L482 AbstractCegarLoop]: Abstraction has 147 states and 318 transitions. [2021-06-05 04:34:37,142 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 04:34:37,142 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 318 transitions. [2021-06-05 04:34:37,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:34:37,142 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:34:37,142 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:34:37,342 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 258 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1412 [2021-06-05 04:34:37,342 INFO L430 AbstractCegarLoop]: === Iteration 264 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:34:37,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:34:37,343 INFO L82 PathProgramCache]: Analyzing trace with hash -1200670370, now seen corresponding path program 258 times [2021-06-05 04:34:37,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:34:37,343 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724501817] [2021-06-05 04:34:37,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:34:37,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:34:37,561 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 04:34:37,562 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:34:37,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724501817] [2021-06-05 04:34:37,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724501817] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:34:37,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398692028] [2021-06-05 04:34:37,562 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:34:37,590 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:34:37,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:34:37,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:34:37,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:34:37,750 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:37,750 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:37,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:34:37,751 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:37,753 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:37,753 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 19 treesize of output 15 [2021-06-05 04:34:37,754 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:37,775 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:34:37,777 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:37,777 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:37,777 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 10 treesize of output 6 [2021-06-05 04:34:37,779 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:34:37,781 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:37,781 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 13 treesize of output 9 [2021-06-05 04:34:37,782 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:34:37,802 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:34:37,803 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 04:34:37,803 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:35 [2021-06-05 04:34:37,892 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:34:37,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [398692028] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:34:37,892 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:34:37,892 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-05 04:34:37,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125234770] [2021-06-05 04:34:37,892 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 04:34:37,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:34:37,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 04:34:37,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:34:37,893 INFO L87 Difference]: Start difference. First operand 147 states and 318 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:38,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:34:38,400 INFO L93 Difference]: Finished difference Result 167 states and 353 transitions. [2021-06-05 04:34:38,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:34:38,401 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:34:38,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:34:38,401 INFO L225 Difference]: With dead ends: 167 [2021-06-05 04:34:38,401 INFO L226 Difference]: Without dead ends: 157 [2021-06-05 04:34:38,401 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 673.3ms TimeCoverageRelationStatistics Valid=90, Invalid=722, Unknown=0, NotChecked=0, Total=812 [2021-06-05 04:34:38,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-06-05 04:34:38,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 148. [2021-06-05 04:34:38,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 2.183673469387755) internal successors, (321), 147 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:38,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 321 transitions. [2021-06-05 04:34:38,402 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 321 transitions. Word has length 18 [2021-06-05 04:34:38,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:34:38,403 INFO L482 AbstractCegarLoop]: Abstraction has 148 states and 321 transitions. [2021-06-05 04:34:38,403 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 04:34:38,403 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 321 transitions. [2021-06-05 04:34:38,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:34:38,403 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:34:38,403 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:34:38,604 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 259 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1413 [2021-06-05 04:34:38,605 INFO L430 AbstractCegarLoop]: === Iteration 265 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:34:38,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:34:38,605 INFO L82 PathProgramCache]: Analyzing trace with hash -148672466, now seen corresponding path program 259 times [2021-06-05 04:34:38,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:34:38,605 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949700617] [2021-06-05 04:34:38,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:34:38,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:34:38,756 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:34:38,756 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:34:38,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949700617] [2021-06-05 04:34:38,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949700617] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:34:38,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743442136] [2021-06-05 04:34:38,757 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 04:34:38,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:34:38,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 04:34:38,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:34:38,911 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:38,911 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:38,912 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 27 treesize of output 21 [2021-06-05 04:34:38,913 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:38,916 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:38,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 04:34:38,917 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:38,945 INFO L628 ElimStorePlain]: treesize reduction 42, result has 39.1 percent of original size [2021-06-05 04:34:38,947 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:38,948 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 10 treesize of output 6 [2021-06-05 04:34:38,949 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:34:38,957 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:34:38,958 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 04:34:38,958 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-06-05 04:34:38,995 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 04:34:38,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1743442136] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:34:38,995 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:34:38,995 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-05 04:34:38,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912709487] [2021-06-05 04:34:38,995 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 04:34:38,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:34:38,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 04:34:38,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:34:38,996 INFO L87 Difference]: Start difference. First operand 148 states and 321 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:39,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:34:39,279 INFO L93 Difference]: Finished difference Result 171 states and 362 transitions. [2021-06-05 04:34:39,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:34:39,279 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:34:39,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:34:39,279 INFO L225 Difference]: With dead ends: 171 [2021-06-05 04:34:39,279 INFO L226 Difference]: Without dead ends: 158 [2021-06-05 04:34:39,280 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 392.6ms TimeCoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:34:39,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-06-05 04:34:39,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 150. [2021-06-05 04:34:39,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 2.1812080536912752) internal successors, (325), 149 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:39,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 325 transitions. [2021-06-05 04:34:39,281 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 325 transitions. Word has length 18 [2021-06-05 04:34:39,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:34:39,281 INFO L482 AbstractCegarLoop]: Abstraction has 150 states and 325 transitions. [2021-06-05 04:34:39,281 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 04:34:39,281 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 325 transitions. [2021-06-05 04:34:39,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:34:39,281 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:34:39,281 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:34:39,482 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1418,260 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:34:39,482 INFO L430 AbstractCegarLoop]: === Iteration 266 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:34:39,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:34:39,482 INFO L82 PathProgramCache]: Analyzing trace with hash 987512806, now seen corresponding path program 260 times [2021-06-05 04:34:39,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:34:39,482 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140881479] [2021-06-05 04:34:39,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:34:39,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:34:39,652 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:34:39,652 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:34:39,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140881479] [2021-06-05 04:34:39,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140881479] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:34:39,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353425969] [2021-06-05 04:34:39,652 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 04:34:39,676 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:34:39,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:34:39,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:34:39,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:34:39,792 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:39,792 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:39,793 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 19 treesize of output 15 [2021-06-05 04:34:39,793 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:39,795 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:39,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:34:39,796 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:39,817 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:34:39,820 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:39,820 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:39,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:34:39,821 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:34:39,823 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:39,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 04:34:39,825 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:34:39,845 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:34:39,846 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 04:34:39,846 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:35 [2021-06-05 04:34:39,914 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:34:39,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1353425969] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:34:39,915 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:34:39,915 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-05 04:34:39,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865982861] [2021-06-05 04:34:39,915 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 04:34:39,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:34:39,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 04:34:39,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:34:39,915 INFO L87 Difference]: Start difference. First operand 150 states and 325 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:40,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:34:40,215 INFO L93 Difference]: Finished difference Result 168 states and 359 transitions. [2021-06-05 04:34:40,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:34:40,216 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:34:40,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:34:40,216 INFO L225 Difference]: With dead ends: 168 [2021-06-05 04:34:40,216 INFO L226 Difference]: Without dead ends: 161 [2021-06-05 04:34:40,216 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 440.5ms TimeCoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:34:40,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-06-05 04:34:40,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 150. [2021-06-05 04:34:40,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 2.1812080536912752) internal successors, (325), 149 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:40,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 325 transitions. [2021-06-05 04:34:40,218 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 325 transitions. Word has length 18 [2021-06-05 04:34:40,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:34:40,218 INFO L482 AbstractCegarLoop]: Abstraction has 150 states and 325 transitions. [2021-06-05 04:34:40,218 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 04:34:40,218 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 325 transitions. [2021-06-05 04:34:40,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:34:40,218 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:34:40,218 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:34:40,418 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1419,261 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:34:40,418 INFO L430 AbstractCegarLoop]: === Iteration 267 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:34:40,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:34:40,419 INFO L82 PathProgramCache]: Analyzing trace with hash -1158657954, now seen corresponding path program 261 times [2021-06-05 04:34:40,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:34:40,419 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789684315] [2021-06-05 04:34:40,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:34:40,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:34:40,574 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:34:40,574 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:34:40,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789684315] [2021-06-05 04:34:40,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789684315] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:34:40,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064581022] [2021-06-05 04:34:40,574 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:34:40,599 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 04:34:40,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:34:40,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 04:34:40,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:34:40,718 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:40,719 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:40,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:34:40,719 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:40,733 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:40,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:34:40,734 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:40,794 INFO L628 ElimStorePlain]: treesize reduction 85, result has 46.9 percent of original size [2021-06-05 04:34:40,796 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:40,797 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 13 treesize of output 9 [2021-06-05 04:34:40,798 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:34:40,821 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:34:40,824 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:40,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:34:40,825 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:40,846 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:34:40,848 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:40,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 04:34:40,849 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:34:40,870 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:34:40,871 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 04:34:40,871 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-06-05 04:34:40,944 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 04:34:40,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2064581022] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:34:40,944 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:34:40,945 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-05 04:34:40,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518842093] [2021-06-05 04:34:40,945 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 04:34:40,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:34:40,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 04:34:40,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:34:40,945 INFO L87 Difference]: Start difference. First operand 150 states and 325 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:41,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:34:41,302 INFO L93 Difference]: Finished difference Result 184 states and 390 transitions. [2021-06-05 04:34:41,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:34:41,303 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:34:41,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:34:41,303 INFO L225 Difference]: With dead ends: 184 [2021-06-05 04:34:41,303 INFO L226 Difference]: Without dead ends: 172 [2021-06-05 04:34:41,303 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 422.5ms TimeCoverageRelationStatistics Valid=89, Invalid=561, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:34:41,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-06-05 04:34:41,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 150. [2021-06-05 04:34:41,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 2.1812080536912752) internal successors, (325), 149 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:41,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 325 transitions. [2021-06-05 04:34:41,305 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 325 transitions. Word has length 18 [2021-06-05 04:34:41,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:34:41,305 INFO L482 AbstractCegarLoop]: Abstraction has 150 states and 325 transitions. [2021-06-05 04:34:41,305 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 04:34:41,305 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 325 transitions. [2021-06-05 04:34:41,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:34:41,305 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:34:41,305 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:34:41,505 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1422,262 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:34:41,505 INFO L430 AbstractCegarLoop]: === Iteration 268 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:34:41,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:34:41,506 INFO L82 PathProgramCache]: Analyzing trace with hash -1034470746, now seen corresponding path program 262 times [2021-06-05 04:34:41,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:34:41,506 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44980133] [2021-06-05 04:34:41,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:34:41,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:34:41,664 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 04:34:41,664 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:34:41,664 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44980133] [2021-06-05 04:34:41,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44980133] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:34:41,664 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892394857] [2021-06-05 04:34:41,664 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:34:41,688 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:34:41,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:34:41,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 04:34:41,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:34:41,809 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:41,809 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:41,810 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 27 treesize of output 21 [2021-06-05 04:34:41,810 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:41,812 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:41,813 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 27 treesize of output 21 [2021-06-05 04:34:41,813 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:41,835 INFO L628 ElimStorePlain]: treesize reduction 36, result has 42.9 percent of original size [2021-06-05 04:34:41,837 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:41,837 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 10 treesize of output 6 [2021-06-05 04:34:41,839 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:34:41,845 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:34:41,846 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 04:34:41,846 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-06-05 04:34:41,882 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:34:41,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1892394857] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:34:41,883 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:34:41,883 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-05 04:34:41,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103535728] [2021-06-05 04:34:41,883 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 04:34:41,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:34:41,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 04:34:41,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:34:41,883 INFO L87 Difference]: Start difference. First operand 150 states and 325 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:42,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:34:42,154 INFO L93 Difference]: Finished difference Result 172 states and 364 transitions. [2021-06-05 04:34:42,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:34:42,154 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:34:42,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:34:42,154 INFO L225 Difference]: With dead ends: 172 [2021-06-05 04:34:42,154 INFO L226 Difference]: Without dead ends: 159 [2021-06-05 04:34:42,155 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 367.6ms TimeCoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:34:42,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-06-05 04:34:42,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 153. [2021-06-05 04:34:42,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 2.1776315789473686) internal successors, (331), 152 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:42,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 331 transitions. [2021-06-05 04:34:42,156 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 331 transitions. Word has length 18 [2021-06-05 04:34:42,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:34:42,156 INFO L482 AbstractCegarLoop]: Abstraction has 153 states and 331 transitions. [2021-06-05 04:34:42,156 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:42,156 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 331 transitions. [2021-06-05 04:34:42,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:34:42,156 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:34:42,156 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:34:42,357 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1427,263 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:34:42,357 INFO L430 AbstractCegarLoop]: === Iteration 269 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:34:42,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:34:42,357 INFO L82 PathProgramCache]: Analyzing trace with hash 101714526, now seen corresponding path program 263 times [2021-06-05 04:34:42,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:34:42,357 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90737444] [2021-06-05 04:34:42,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:34:42,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:34:42,531 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:34:42,531 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:34:42,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90737444] [2021-06-05 04:34:42,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90737444] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:34:42,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376385924] [2021-06-05 04:34:42,531 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:34:42,556 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 04:34:42,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:34:42,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 04:34:42,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:34:42,658 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:42,658 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:42,659 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 19 treesize of output 15 [2021-06-05 04:34:42,659 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:42,662 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:42,662 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:42,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:34:42,663 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:42,666 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:42,666 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:42,666 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 19 treesize of output 15 [2021-06-05 04:34:42,667 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:42,669 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:42,669 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 19 treesize of output 15 [2021-06-05 04:34:42,670 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:42,724 INFO L628 ElimStorePlain]: treesize reduction 77, result has 45.4 percent of original size [2021-06-05 04:34:42,727 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:42,727 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:42,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:34:42,728 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:34:42,731 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:42,731 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 10 treesize of output 6 [2021-06-05 04:34:42,732 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:34:42,754 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:34:42,755 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 04:34:42,755 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:173, output treesize:38 [2021-06-05 04:34:42,828 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:34:42,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [376385924] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:34:42,828 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:34:42,828 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-05 04:34:42,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968793686] [2021-06-05 04:34:42,829 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 04:34:42,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:34:42,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 04:34:42,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:34:42,829 INFO L87 Difference]: Start difference. First operand 153 states and 331 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:43,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:34:43,224 INFO L93 Difference]: Finished difference Result 191 states and 391 transitions. [2021-06-05 04:34:43,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:34:43,225 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:34:43,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:34:43,225 INFO L225 Difference]: With dead ends: 191 [2021-06-05 04:34:43,225 INFO L226 Difference]: Without dead ends: 172 [2021-06-05 04:34:43,225 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 471.0ms TimeCoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:34:43,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-06-05 04:34:43,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 152. [2021-06-05 04:34:43,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 2.1788079470198674) internal successors, (329), 151 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:43,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 329 transitions. [2021-06-05 04:34:43,226 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 329 transitions. Word has length 18 [2021-06-05 04:34:43,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:34:43,227 INFO L482 AbstractCegarLoop]: Abstraction has 152 states and 329 transitions. [2021-06-05 04:34:43,227 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 04:34:43,227 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 329 transitions. [2021-06-05 04:34:43,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:34:43,227 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:34:43,227 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:34:43,427 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 264 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1428 [2021-06-05 04:34:43,427 INFO L430 AbstractCegarLoop]: === Iteration 270 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:34:43,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:34:43,428 INFO L82 PathProgramCache]: Analyzing trace with hash -2044456234, now seen corresponding path program 264 times [2021-06-05 04:34:43,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:34:43,428 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873813894] [2021-06-05 04:34:43,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:34:43,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:34:43,612 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 04:34:43,612 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:34:43,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873813894] [2021-06-05 04:34:43,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873813894] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:34:43,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759984343] [2021-06-05 04:34:43,612 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:34:43,637 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:34:43,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:34:43,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:34:43,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:34:43,752 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:43,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:34:43,753 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:43,773 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:34:43,776 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:43,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 04:34:43,777 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:34:43,798 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:34:43,800 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:43,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:34:43,801 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:43,821 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:34:43,823 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:43,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:34:43,824 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:34:43,842 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:34:43,843 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:34:43,844 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:77, output treesize:35 [2021-06-05 04:34:43,928 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:34:43,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [759984343] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:34:43,929 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:34:43,929 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-05 04:34:43,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711031182] [2021-06-05 04:34:43,929 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 04:34:43,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:34:43,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 04:34:43,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:34:43,929 INFO L87 Difference]: Start difference. First operand 152 states and 329 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:44,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:34:44,299 INFO L93 Difference]: Finished difference Result 180 states and 378 transitions. [2021-06-05 04:34:44,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:34:44,299 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:34:44,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:34:44,299 INFO L225 Difference]: With dead ends: 180 [2021-06-05 04:34:44,299 INFO L226 Difference]: Without dead ends: 166 [2021-06-05 04:34:44,300 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 497.6ms TimeCoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:34:44,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-06-05 04:34:44,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 152. [2021-06-05 04:34:44,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 2.1788079470198674) internal successors, (329), 151 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:44,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 329 transitions. [2021-06-05 04:34:44,301 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 329 transitions. Word has length 18 [2021-06-05 04:34:44,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:34:44,301 INFO L482 AbstractCegarLoop]: Abstraction has 152 states and 329 transitions. [2021-06-05 04:34:44,301 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 04:34:44,301 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 329 transitions. [2021-06-05 04:34:44,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:34:44,301 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:34:44,301 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:34:44,502 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 265 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1431 [2021-06-05 04:34:44,502 INFO L430 AbstractCegarLoop]: === Iteration 271 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:34:44,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:34:44,502 INFO L82 PathProgramCache]: Analyzing trace with hash 143726942, now seen corresponding path program 265 times [2021-06-05 04:34:44,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:34:44,502 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257478039] [2021-06-05 04:34:44,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:34:44,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:34:44,671 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:34:44,671 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:34:44,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257478039] [2021-06-05 04:34:44,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257478039] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:34:44,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376990131] [2021-06-05 04:34:44,672 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:34:44,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:34:44,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 04:34:44,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:34:44,847 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:44,847 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:44,847 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 19 treesize of output 15 [2021-06-05 04:34:44,848 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:44,851 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:44,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:34:44,852 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:44,913 INFO L628 ElimStorePlain]: treesize reduction 85, result has 46.9 percent of original size [2021-06-05 04:34:44,915 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:44,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:34:44,916 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:44,938 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:34:44,941 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:44,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 04:34:44,942 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:34:44,964 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:34:44,967 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:44,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 04:34:44,968 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:34:44,989 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:34:44,990 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 04:34:44,990 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-06-05 04:34:45,062 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:34:45,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [376990131] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:34:45,062 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:34:45,062 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-06-05 04:34:45,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776005116] [2021-06-05 04:34:45,063 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:34:45,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:34:45,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:34:45,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:34:45,063 INFO L87 Difference]: Start difference. First operand 152 states and 329 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:45,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:34:45,465 INFO L93 Difference]: Finished difference Result 206 states and 426 transitions. [2021-06-05 04:34:45,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:34:45,465 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:34:45,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:34:45,465 INFO L225 Difference]: With dead ends: 206 [2021-06-05 04:34:45,465 INFO L226 Difference]: Without dead ends: 187 [2021-06-05 04:34:45,466 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 512.1ms TimeCoverageRelationStatistics Valid=97, Invalid=605, Unknown=0, NotChecked=0, Total=702 [2021-06-05 04:34:45,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-06-05 04:34:45,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 152. [2021-06-05 04:34:45,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 2.1788079470198674) internal successors, (329), 151 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:45,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 329 transitions. [2021-06-05 04:34:45,467 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 329 transitions. Word has length 18 [2021-06-05 04:34:45,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:34:45,467 INFO L482 AbstractCegarLoop]: Abstraction has 152 states and 329 transitions. [2021-06-05 04:34:45,467 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 04:34:45,467 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 329 transitions. [2021-06-05 04:34:45,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:34:45,467 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:34:45,467 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:34:45,668 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 266 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1438 [2021-06-05 04:34:45,668 INFO L430 AbstractCegarLoop]: === Iteration 272 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:34:45,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:34:45,668 INFO L82 PathProgramCache]: Analyzing trace with hash 1570553646, now seen corresponding path program 266 times [2021-06-05 04:34:45,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:34:45,668 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097874193] [2021-06-05 04:34:45,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:34:45,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:34:45,828 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:34:45,828 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:34:45,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097874193] [2021-06-05 04:34:45,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097874193] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:34:45,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785734256] [2021-06-05 04:34:45,829 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:34:45,852 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:34:45,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:34:45,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:34:45,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:34:45,973 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:45,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 04:34:45,974 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:45,980 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:34:45,982 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:45,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 04:34:45,982 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:45,988 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:34:45,989 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 04:34:45,989 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:38, output treesize:13 [2021-06-05 04:34:46,023 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:34:46,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1785734256] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:34:46,024 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:34:46,024 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-05 04:34:46,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924042424] [2021-06-05 04:34:46,024 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 04:34:46,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:34:46,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 04:34:46,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:34:46,024 INFO L87 Difference]: Start difference. First operand 152 states and 329 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:46,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:34:46,246 INFO L93 Difference]: Finished difference Result 172 states and 364 transitions. [2021-06-05 04:34:46,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:34:46,246 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:34:46,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:34:46,247 INFO L225 Difference]: With dead ends: 172 [2021-06-05 04:34:46,247 INFO L226 Difference]: Without dead ends: 165 [2021-06-05 04:34:46,247 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 325.3ms TimeCoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:34:46,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-06-05 04:34:46,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 156. [2021-06-05 04:34:46,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 2.1806451612903226) internal successors, (338), 155 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:46,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 338 transitions. [2021-06-05 04:34:46,249 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 338 transitions. Word has length 18 [2021-06-05 04:34:46,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:34:46,249 INFO L482 AbstractCegarLoop]: Abstraction has 156 states and 338 transitions. [2021-06-05 04:34:46,249 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 04:34:46,249 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 338 transitions. [2021-06-05 04:34:46,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:34:46,249 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:34:46,249 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:34:46,471 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 267 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1443 [2021-06-05 04:34:46,471 INFO L430 AbstractCegarLoop]: === Iteration 273 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:34:46,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:34:46,472 INFO L82 PathProgramCache]: Analyzing trace with hash -1588228378, now seen corresponding path program 267 times [2021-06-05 04:34:46,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:34:46,472 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411304227] [2021-06-05 04:34:46,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:34:46,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:34:46,642 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:34:46,642 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:34:46,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411304227] [2021-06-05 04:34:46,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411304227] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:34:46,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750659147] [2021-06-05 04:34:46,642 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 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 04:34:46,667 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:34:46,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:34:46,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 04:34:46,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:34:46,800 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:46,801 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:46,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:34:46,802 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:46,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:46,806 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:46,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:34:46,807 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:46,810 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:46,810 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:46,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:34:46,811 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:46,814 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:46,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:34:46,815 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:46,870 INFO L628 ElimStorePlain]: treesize reduction 80, result has 44.4 percent of original size [2021-06-05 04:34:46,872 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:46,873 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:46,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:34:46,874 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:34:46,876 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:46,876 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 10 treesize of output 6 [2021-06-05 04:34:46,878 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:34:46,900 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:34:46,901 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 04:34:46,901 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:173, output treesize:38 [2021-06-05 04:34:46,974 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:34:46,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1750659147] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:34:46,975 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:34:46,975 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-05 04:34:46,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605312058] [2021-06-05 04:34:46,975 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 04:34:46,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:34:46,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 04:34:46,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:34:46,975 INFO L87 Difference]: Start difference. First operand 156 states and 338 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:47,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:34:47,211 INFO L93 Difference]: Finished difference Result 178 states and 373 transitions. [2021-06-05 04:34:47,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:34:47,212 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:34:47,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:34:47,212 INFO L225 Difference]: With dead ends: 178 [2021-06-05 04:34:47,212 INFO L226 Difference]: Without dead ends: 166 [2021-06-05 04:34:47,212 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 361.8ms TimeCoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:34:47,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-06-05 04:34:47,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 155. [2021-06-05 04:34:47,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 2.175324675324675) internal successors, (335), 154 states have internal predecessors, (335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:47,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 335 transitions. [2021-06-05 04:34:47,214 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 335 transitions. Word has length 18 [2021-06-05 04:34:47,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:34:47,214 INFO L482 AbstractCegarLoop]: Abstraction has 155 states and 335 transitions. [2021-06-05 04:34:47,214 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 04:34:47,214 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 335 transitions. [2021-06-05 04:34:47,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:34:47,214 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:34:47,214 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:34:47,414 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 268 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1444 [2021-06-05 04:34:47,415 INFO L430 AbstractCegarLoop]: === Iteration 274 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:34:47,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:34:47,415 INFO L82 PathProgramCache]: Analyzing trace with hash 560568158, now seen corresponding path program 268 times [2021-06-05 04:34:47,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:34:47,415 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336855179] [2021-06-05 04:34:47,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:34:47,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:34:47,582 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:34:47,582 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:34:47,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336855179] [2021-06-05 04:34:47,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336855179] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:34:47,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879246442] [2021-06-05 04:34:47,582 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:34:47,605 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:34:47,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:34:47,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 04:34:47,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:34:47,726 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:47,726 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:47,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:34:47,727 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:47,730 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:47,730 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 19 treesize of output 15 [2021-06-05 04:34:47,731 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:47,791 INFO L628 ElimStorePlain]: treesize reduction 88, result has 45.0 percent of original size [2021-06-05 04:34:47,794 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:47,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:34:47,796 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:34:47,819 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:34:47,822 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:47,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:34:47,823 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:47,844 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:34:47,847 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:47,847 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 13 treesize of output 9 [2021-06-05 04:34:47,848 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:34:47,869 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:34:47,870 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 04:34:47,870 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-06-05 04:34:47,942 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:34:47,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1879246442] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:34:47,942 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:34:47,942 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-06-05 04:34:47,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024157314] [2021-06-05 04:34:47,942 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:34:47,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:34:47,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:34:47,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:34:47,943 INFO L87 Difference]: Start difference. First operand 155 states and 335 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:48,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:34:48,257 INFO L93 Difference]: Finished difference Result 203 states and 420 transitions. [2021-06-05 04:34:48,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:34:48,257 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:34:48,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:34:48,257 INFO L225 Difference]: With dead ends: 203 [2021-06-05 04:34:48,257 INFO L226 Difference]: Without dead ends: 184 [2021-06-05 04:34:48,257 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 463.5ms TimeCoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:34:48,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-06-05 04:34:48,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 154. [2021-06-05 04:34:48,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 2.176470588235294) internal successors, (333), 153 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:48,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 333 transitions. [2021-06-05 04:34:48,259 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 333 transitions. Word has length 18 [2021-06-05 04:34:48,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:34:48,259 INFO L482 AbstractCegarLoop]: Abstraction has 154 states and 333 transitions. [2021-06-05 04:34:48,259 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:48,259 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 333 transitions. [2021-06-05 04:34:48,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:34:48,259 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:34:48,259 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:34:48,460 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 269 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1447 [2021-06-05 04:34:48,460 INFO L430 AbstractCegarLoop]: === Iteration 275 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:34:48,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:34:48,460 INFO L82 PathProgramCache]: Analyzing trace with hash -1546215962, now seen corresponding path program 269 times [2021-06-05 04:34:48,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:34:48,460 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861633720] [2021-06-05 04:34:48,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:34:48,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:34:48,630 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:34:48,631 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:34:48,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861633720] [2021-06-05 04:34:48,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861633720] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:34:48,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877227945] [2021-06-05 04:34:48,631 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:34:48,655 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:34:48,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:34:48,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 04:34:48,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:34:48,809 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:48,809 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:48,810 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 19 treesize of output 15 [2021-06-05 04:34:48,810 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:48,813 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:48,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:34:48,814 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:48,875 INFO L628 ElimStorePlain]: treesize reduction 88, result has 45.0 percent of original size [2021-06-05 04:34:48,877 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:48,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:34:48,879 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:34:48,902 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:34:48,905 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:48,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:34:48,906 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:48,928 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:34:48,930 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:48,930 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 10 treesize of output 6 [2021-06-05 04:34:48,932 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:34:48,952 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:34:48,953 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 04:34:48,953 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-06-05 04:34:49,032 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 04:34:49,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1877227945] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:34:49,032 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:34:49,032 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-05 04:34:49,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466989511] [2021-06-05 04:34:49,032 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 04:34:49,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:34:49,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 04:34:49,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:34:49,033 INFO L87 Difference]: Start difference. First operand 154 states and 333 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:49,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:34:49,512 INFO L93 Difference]: Finished difference Result 206 states and 426 transitions. [2021-06-05 04:34:49,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:34:49,512 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:34:49,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:34:49,513 INFO L225 Difference]: With dead ends: 206 [2021-06-05 04:34:49,513 INFO L226 Difference]: Without dead ends: 187 [2021-06-05 04:34:49,513 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 578.5ms TimeCoverageRelationStatistics Valid=98, Invalid=658, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:34:49,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-06-05 04:34:49,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 154. [2021-06-05 04:34:49,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 2.176470588235294) internal successors, (333), 153 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:49,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 333 transitions. [2021-06-05 04:34:49,514 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 333 transitions. Word has length 18 [2021-06-05 04:34:49,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:34:49,514 INFO L482 AbstractCegarLoop]: Abstraction has 154 states and 333 transitions. [2021-06-05 04:34:49,514 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 04:34:49,514 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 333 transitions. [2021-06-05 04:34:49,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:34:49,515 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:34:49,515 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:34:49,715 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1452,270 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:34:49,715 INFO L430 AbstractCegarLoop]: === Iteration 276 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:34:49,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:34:49,715 INFO L82 PathProgramCache]: Analyzing trace with hash 1862953054, now seen corresponding path program 270 times [2021-06-05 04:34:49,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:34:49,716 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064912488] [2021-06-05 04:34:49,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:34:49,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:34:49,926 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:34:49,926 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:34:49,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064912488] [2021-06-05 04:34:49,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064912488] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:34:49,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997996914] [2021-06-05 04:34:49,927 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 04:34:49,951 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:34:49,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:34:49,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 04:34:49,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:34:50,136 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:50,137 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:50,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:34:50,137 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:50,140 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:50,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:34:50,141 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:50,201 INFO L628 ElimStorePlain]: treesize reduction 88, result has 45.0 percent of original size [2021-06-05 04:34:50,203 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:50,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:34:50,204 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:50,226 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:34:50,228 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:50,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:34:50,230 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:34:50,251 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:34:50,254 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:50,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:34:50,255 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:34:50,276 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:34:50,277 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 04:34:50,277 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-06-05 04:34:50,358 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 04:34:50,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [997996914] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:34:50,358 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:34:50,358 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-05 04:34:50,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768017428] [2021-06-05 04:34:50,358 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 04:34:50,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:34:50,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 04:34:50,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=368, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:34:50,358 INFO L87 Difference]: Start difference. First operand 154 states and 333 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:51,015 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 63 [2021-06-05 04:34:51,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:34:51,357 INFO L93 Difference]: Finished difference Result 272 states and 540 transitions. [2021-06-05 04:34:51,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 04:34:51,358 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:34:51,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:34:51,358 INFO L225 Difference]: With dead ends: 272 [2021-06-05 04:34:51,358 INFO L226 Difference]: Without dead ends: 232 [2021-06-05 04:34:51,358 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 1103.5ms TimeCoverageRelationStatistics Valid=143, Invalid=849, Unknown=0, NotChecked=0, Total=992 [2021-06-05 04:34:51,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2021-06-05 04:34:51,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 160. [2021-06-05 04:34:51,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 2.2138364779874213) internal successors, (352), 159 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:51,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 352 transitions. [2021-06-05 04:34:51,360 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 352 transitions. Word has length 18 [2021-06-05 04:34:51,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:34:51,360 INFO L482 AbstractCegarLoop]: Abstraction has 160 states and 352 transitions. [2021-06-05 04:34:51,360 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 04:34:51,360 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 352 transitions. [2021-06-05 04:34:51,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:34:51,360 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:34:51,360 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:34:51,560 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 271 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1457 [2021-06-05 04:34:51,561 INFO L430 AbstractCegarLoop]: === Iteration 277 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:34:51,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:34:51,561 INFO L82 PathProgramCache]: Analyzing trace with hash 289867306, now seen corresponding path program 271 times [2021-06-05 04:34:51,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:34:51,561 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159614144] [2021-06-05 04:34:51,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:34:51,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:34:51,707 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:34:51,707 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:34:51,707 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159614144] [2021-06-05 04:34:51,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159614144] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:34:51,707 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479828799] [2021-06-05 04:34:51,707 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:34:51,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:34:51,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 04:34:51,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:34:51,851 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:51,851 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:51,852 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 27 treesize of output 21 [2021-06-05 04:34:51,853 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:51,855 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:51,855 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 27 treesize of output 21 [2021-06-05 04:34:51,856 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:51,877 INFO L628 ElimStorePlain]: treesize reduction 42, result has 39.1 percent of original size [2021-06-05 04:34:51,879 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:51,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:34:51,880 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:34:51,887 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:34:51,888 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:34:51,888 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-06-05 04:34:51,926 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:34:51,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1479828799] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:34:51,926 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:34:51,926 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-06-05 04:34:51,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553950887] [2021-06-05 04:34:51,926 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:34:51,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:34:51,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:34:51,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:34:51,927 INFO L87 Difference]: Start difference. First operand 160 states and 352 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:52,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:34:52,201 INFO L93 Difference]: Finished difference Result 184 states and 390 transitions. [2021-06-05 04:34:52,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:34:52,202 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 04:34:52,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:34:52,202 INFO L225 Difference]: With dead ends: 184 [2021-06-05 04:34:52,202 INFO L226 Difference]: Without dead ends: 168 [2021-06-05 04:34:52,202 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 344.3ms TimeCoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:34:52,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-06-05 04:34:52,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 161. [2021-06-05 04:34:52,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 2.2125) internal successors, (354), 160 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:52,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 354 transitions. [2021-06-05 04:34:52,204 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 354 transitions. Word has length 18 [2021-06-05 04:34:52,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:34:52,204 INFO L482 AbstractCegarLoop]: Abstraction has 161 states and 354 transitions. [2021-06-05 04:34:52,204 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 04:34:52,204 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 354 transitions. [2021-06-05 04:34:52,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:34:52,204 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:34:52,204 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:34:52,404 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 272 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1462 [2021-06-05 04:34:52,405 INFO L430 AbstractCegarLoop]: === Iteration 278 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:34:52,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:34:52,405 INFO L82 PathProgramCache]: Analyzing trace with hash 1151872370, now seen corresponding path program 272 times [2021-06-05 04:34:52,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:34:52,405 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267148976] [2021-06-05 04:34:52,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:34:52,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:34:52,560 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:34:52,560 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:34:52,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267148976] [2021-06-05 04:34:52,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267148976] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:34:52,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944584410] [2021-06-05 04:34:52,560 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:34:52,584 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:34:52,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:34:52,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:34:52,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:34:52,710 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:52,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 04:34:52,720 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:52,726 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:34:52,728 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:52,728 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 10 treesize of output 6 [2021-06-05 04:34:52,730 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:34:52,735 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:34:52,736 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 04:34:52,736 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:38, output treesize:13 [2021-06-05 04:34:52,772 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:34:52,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1944584410] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:34:52,773 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:34:52,773 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-06-05 04:34:52,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361361818] [2021-06-05 04:34:52,773 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:34:52,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:34:52,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:34:52,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:34:52,773 INFO L87 Difference]: Start difference. First operand 161 states and 354 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:53,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:34:53,167 INFO L93 Difference]: Finished difference Result 189 states and 406 transitions. [2021-06-05 04:34:53,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:34:53,168 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 04:34:53,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:34:53,168 INFO L225 Difference]: With dead ends: 189 [2021-06-05 04:34:53,168 INFO L226 Difference]: Without dead ends: 182 [2021-06-05 04:34:53,168 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 473.5ms TimeCoverageRelationStatistics Valid=86, Invalid=616, Unknown=0, NotChecked=0, Total=702 [2021-06-05 04:34:53,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2021-06-05 04:34:53,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 162. [2021-06-05 04:34:53,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 161 states have (on average 2.217391304347826) internal successors, (357), 161 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:53,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 357 transitions. [2021-06-05 04:34:53,170 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 357 transitions. Word has length 18 [2021-06-05 04:34:53,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:34:53,170 INFO L482 AbstractCegarLoop]: Abstraction has 162 states and 357 transitions. [2021-06-05 04:34:53,170 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 04:34:53,170 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 357 transitions. [2021-06-05 04:34:53,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:34:53,170 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:34:53,170 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:34:53,370 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 273 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1463 [2021-06-05 04:34:53,371 INFO L430 AbstractCegarLoop]: === Iteration 279 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:34:53,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:34:53,371 INFO L82 PathProgramCache]: Analyzing trace with hash -2006909654, now seen corresponding path program 273 times [2021-06-05 04:34:53,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:34:53,371 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449573695] [2021-06-05 04:34:53,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:34:53,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:34:53,582 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:34:53,582 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:34:53,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449573695] [2021-06-05 04:34:53,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449573695] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:34:53,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145201247] [2021-06-05 04:34:53,582 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:34:53,606 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:34:53,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:34:53,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:34:53,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:34:53,696 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:53,697 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:53,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:34:53,698 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:53,700 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:53,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:34:53,701 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:53,723 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:34:53,725 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:53,725 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:53,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:34:53,727 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:34:53,729 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:53,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:34:53,730 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:34:53,750 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:34:53,751 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 04:34:53,751 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:35 [2021-06-05 04:34:53,839 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:34:53,839 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1145201247] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:34:53,839 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:34:53,839 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-06-05 04:34:53,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000698319] [2021-06-05 04:34:53,839 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:34:53,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:34:53,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:34:53,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:34:53,842 INFO L87 Difference]: Start difference. First operand 162 states and 357 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:54,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:34:54,354 INFO L93 Difference]: Finished difference Result 193 states and 413 transitions. [2021-06-05 04:34:54,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:34:54,354 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 04:34:54,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:34:54,354 INFO L225 Difference]: With dead ends: 193 [2021-06-05 04:34:54,354 INFO L226 Difference]: Without dead ends: 186 [2021-06-05 04:34:54,354 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 590.4ms TimeCoverageRelationStatistics Valid=96, Invalid=716, Unknown=0, NotChecked=0, Total=812 [2021-06-05 04:34:54,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-06-05 04:34:54,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 162. [2021-06-05 04:34:54,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 161 states have (on average 2.217391304347826) internal successors, (357), 161 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:54,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 357 transitions. [2021-06-05 04:34:54,356 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 357 transitions. Word has length 18 [2021-06-05 04:34:54,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:34:54,356 INFO L482 AbstractCegarLoop]: Abstraction has 162 states and 357 transitions. [2021-06-05 04:34:54,356 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 04:34:54,356 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 357 transitions. [2021-06-05 04:34:54,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:34:54,356 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:34:54,356 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:34:54,557 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 274 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1464 [2021-06-05 04:34:54,557 INFO L430 AbstractCegarLoop]: === Iteration 280 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:34:54,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:34:54,557 INFO L82 PathProgramCache]: Analyzing trace with hash -954911750, now seen corresponding path program 274 times [2021-06-05 04:34:54,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:34:54,557 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595886056] [2021-06-05 04:34:54,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:34:54,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:34:54,694 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:34:54,694 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:34:54,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595886056] [2021-06-05 04:34:54,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595886056] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:34:54,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506209266] [2021-06-05 04:34:54,694 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:34:54,718 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:34:54,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:34:54,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 04:34:54,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:34:54,831 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:54,832 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:54,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 04:34:54,833 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:54,835 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:54,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 04:34:54,836 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:54,857 INFO L628 ElimStorePlain]: treesize reduction 36, result has 47.8 percent of original size [2021-06-05 04:34:54,859 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:54,859 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 21 treesize of output 13 [2021-06-05 04:34:54,860 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:54,867 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:34:54,867 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:34:54,867 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-06-05 04:34:54,904 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:34:54,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [506209266] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:34:54,904 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:34:54,904 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-06-05 04:34:54,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366686288] [2021-06-05 04:34:54,904 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:34:54,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:34:54,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:34:54,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:34:54,904 INFO L87 Difference]: Start difference. First operand 162 states and 357 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:55,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:34:55,238 INFO L93 Difference]: Finished difference Result 191 states and 410 transitions. [2021-06-05 04:34:55,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:34:55,238 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 04:34:55,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:34:55,238 INFO L225 Difference]: With dead ends: 191 [2021-06-05 04:34:55,238 INFO L226 Difference]: Without dead ends: 178 [2021-06-05 04:34:55,238 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 373.0ms TimeCoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:34:55,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-06-05 04:34:55,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 164. [2021-06-05 04:34:55,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 2.214723926380368) internal successors, (361), 163 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:55,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 361 transitions. [2021-06-05 04:34:55,240 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 361 transitions. Word has length 18 [2021-06-05 04:34:55,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:34:55,240 INFO L482 AbstractCegarLoop]: Abstraction has 164 states and 361 transitions. [2021-06-05 04:34:55,240 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 04:34:55,240 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 361 transitions. [2021-06-05 04:34:55,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:34:55,240 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:34:55,240 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:34:55,441 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1469,275 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:34:55,441 INFO L430 AbstractCegarLoop]: === Iteration 281 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:34:55,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:34:55,441 INFO L82 PathProgramCache]: Analyzing trace with hash 181273522, now seen corresponding path program 275 times [2021-06-05 04:34:55,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:34:55,441 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308288921] [2021-06-05 04:34:55,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:34:55,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:34:55,618 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:34:55,619 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:34:55,619 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308288921] [2021-06-05 04:34:55,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308288921] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:34:55,619 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104825634] [2021-06-05 04:34:55,619 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:34:55,643 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:34:55,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:34:55,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 04:34:55,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:34:55,736 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:55,736 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:55,736 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 19 treesize of output 15 [2021-06-05 04:34:55,737 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:55,740 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:55,740 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:55,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:34:55,741 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:55,743 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:55,744 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:55,744 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 19 treesize of output 15 [2021-06-05 04:34:55,745 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:55,747 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:55,747 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 19 treesize of output 15 [2021-06-05 04:34:55,748 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:55,803 INFO L628 ElimStorePlain]: treesize reduction 80, result has 46.7 percent of original size [2021-06-05 04:34:55,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:55,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:55,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 04:34:55,807 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:34:55,809 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:55,809 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 13 treesize of output 9 [2021-06-05 04:34:55,811 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:34:55,833 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:34:55,834 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 04:34:55,834 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:173, output treesize:38 [2021-06-05 04:34:55,918 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 04:34:55,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2104825634] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:34:55,918 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:34:55,918 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-06-05 04:34:55,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806909670] [2021-06-05 04:34:55,919 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:34:55,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:34:55,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:34:55,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:34:55,919 INFO L87 Difference]: Start difference. First operand 164 states and 361 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:56,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:34:56,447 INFO L93 Difference]: Finished difference Result 213 states and 437 transitions. [2021-06-05 04:34:56,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:34:56,447 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 04:34:56,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:34:56,448 INFO L225 Difference]: With dead ends: 213 [2021-06-05 04:34:56,448 INFO L226 Difference]: Without dead ends: 189 [2021-06-05 04:34:56,448 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 608.6ms TimeCoverageRelationStatistics Valid=102, Invalid=654, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:34:56,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-06-05 04:34:56,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 161. [2021-06-05 04:34:56,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 2.21875) internal successors, (355), 160 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:56,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 355 transitions. [2021-06-05 04:34:56,449 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 355 transitions. Word has length 18 [2021-06-05 04:34:56,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:34:56,449 INFO L482 AbstractCegarLoop]: Abstraction has 161 states and 355 transitions. [2021-06-05 04:34:56,449 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 04:34:56,450 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 355 transitions. [2021-06-05 04:34:56,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:34:56,450 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:34:56,450 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:34:56,650 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1470,276 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:34:56,650 INFO L430 AbstractCegarLoop]: === Iteration 282 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:34:56,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:34:56,650 INFO L82 PathProgramCache]: Analyzing trace with hash -1964897238, now seen corresponding path program 276 times [2021-06-05 04:34:56,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:34:56,651 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287401570] [2021-06-05 04:34:56,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:34:56,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:34:56,828 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:34:56,828 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:34:56,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287401570] [2021-06-05 04:34:56,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287401570] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:34:56,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928856773] [2021-06-05 04:34:56,828 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 04:34:56,853 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 04:34:56,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:34:56,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 04:34:56,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:34:56,965 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:56,965 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:56,966 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 19 treesize of output 15 [2021-06-05 04:34:56,966 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:56,969 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:56,969 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 19 treesize of output 15 [2021-06-05 04:34:56,970 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:57,029 INFO L628 ElimStorePlain]: treesize reduction 88, result has 45.0 percent of original size [2021-06-05 04:34:57,031 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:57,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:34:57,032 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:57,054 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:34:57,056 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:57,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:34:57,057 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:34:57,079 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:34:57,081 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:57,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:34:57,083 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:34:57,103 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:34:57,104 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 04:34:57,104 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-06-05 04:34:57,181 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:34:57,181 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1928856773] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:34:57,181 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:34:57,181 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-06-05 04:34:57,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581142866] [2021-06-05 04:34:57,181 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:34:57,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:34:57,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:34:57,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:34:57,181 INFO L87 Difference]: Start difference. First operand 161 states and 355 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:57,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:34:57,681 INFO L93 Difference]: Finished difference Result 221 states and 462 transitions. [2021-06-05 04:34:57,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 04:34:57,681 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:34:57,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:34:57,682 INFO L225 Difference]: With dead ends: 221 [2021-06-05 04:34:57,682 INFO L226 Difference]: Without dead ends: 202 [2021-06-05 04:34:57,682 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 561.9ms TimeCoverageRelationStatistics Valid=105, Invalid=651, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:34:57,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-06-05 04:34:57,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 159. [2021-06-05 04:34:57,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 2.221518987341772) internal successors, (351), 158 states have internal predecessors, (351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:57,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 351 transitions. [2021-06-05 04:34:57,683 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 351 transitions. Word has length 18 [2021-06-05 04:34:57,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:34:57,683 INFO L482 AbstractCegarLoop]: Abstraction has 159 states and 351 transitions. [2021-06-05 04:34:57,683 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 04:34:57,683 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 351 transitions. [2021-06-05 04:34:57,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:34:57,684 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:34:57,684 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:34:57,884 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 277 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1473 [2021-06-05 04:34:57,884 INFO L430 AbstractCegarLoop]: === Iteration 283 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:34:57,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:34:57,884 INFO L82 PathProgramCache]: Analyzing trace with hash -1840710030, now seen corresponding path program 277 times [2021-06-05 04:34:57,884 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:34:57,884 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852437983] [2021-06-05 04:34:57,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:34:57,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:34:58,020 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:34:58,020 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:34:58,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852437983] [2021-06-05 04:34:58,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852437983] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:34:58,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414951467] [2021-06-05 04:34:58,020 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:34:58,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:34:58,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 04:34:58,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:34:58,157 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:58,157 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:58,157 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 27 treesize of output 21 [2021-06-05 04:34:58,158 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:58,160 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:58,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 04:34:58,161 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:58,183 INFO L628 ElimStorePlain]: treesize reduction 36, result has 42.9 percent of original size [2021-06-05 04:34:58,185 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:58,185 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 10 treesize of output 6 [2021-06-05 04:34:58,186 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:34:58,193 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:34:58,194 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:34:58,194 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-06-05 04:34:58,230 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 04:34:58,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [414951467] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:34:58,230 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:34:58,230 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-06-05 04:34:58,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483359626] [2021-06-05 04:34:58,230 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:34:58,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:34:58,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:34:58,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:34:58,231 INFO L87 Difference]: Start difference. First operand 159 states and 351 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:58,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:34:58,591 INFO L93 Difference]: Finished difference Result 186 states and 399 transitions. [2021-06-05 04:34:58,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:34:58,591 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 04:34:58,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:34:58,591 INFO L225 Difference]: With dead ends: 186 [2021-06-05 04:34:58,592 INFO L226 Difference]: Without dead ends: 173 [2021-06-05 04:34:58,592 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 376.3ms TimeCoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:34:58,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-06-05 04:34:58,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 162. [2021-06-05 04:34:58,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 161 states have (on average 2.217391304347826) internal successors, (357), 161 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:58,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 357 transitions. [2021-06-05 04:34:58,593 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 357 transitions. Word has length 18 [2021-06-05 04:34:58,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:34:58,593 INFO L482 AbstractCegarLoop]: Abstraction has 162 states and 357 transitions. [2021-06-05 04:34:58,593 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 04:34:58,593 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 357 transitions. [2021-06-05 04:34:58,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:34:58,593 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:34:58,593 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:34:58,794 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 278 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1478 [2021-06-05 04:34:58,794 INFO L430 AbstractCegarLoop]: === Iteration 284 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:34:58,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:34:58,794 INFO L82 PathProgramCache]: Analyzing trace with hash -704524758, now seen corresponding path program 278 times [2021-06-05 04:34:58,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:34:58,794 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873596460] [2021-06-05 04:34:58,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:34:58,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:34:58,973 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:34:58,973 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:34:58,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873596460] [2021-06-05 04:34:58,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873596460] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:34:58,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870590838] [2021-06-05 04:34:58,973 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:34:58,997 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:34:58,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:34:58,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:34:58,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:34:59,092 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:59,092 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:59,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:34:59,093 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:59,095 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:59,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:34:59,096 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:59,118 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:34:59,120 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:59,121 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:59,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 04:34:59,122 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:34:59,124 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:59,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 04:34:59,125 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:34:59,145 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:34:59,146 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 04:34:59,147 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:35 [2021-06-05 04:34:59,214 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:34:59,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1870590838] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:34:59,214 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:34:59,214 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-06-05 04:34:59,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576450007] [2021-06-05 04:34:59,214 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:34:59,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:34:59,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:34:59,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:34:59,215 INFO L87 Difference]: Start difference. First operand 162 states and 357 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:59,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:34:59,553 INFO L93 Difference]: Finished difference Result 184 states and 398 transitions. [2021-06-05 04:34:59,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:34:59,554 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 04:34:59,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:34:59,554 INFO L225 Difference]: With dead ends: 184 [2021-06-05 04:34:59,554 INFO L226 Difference]: Without dead ends: 177 [2021-06-05 04:34:59,554 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 404.7ms TimeCoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:34:59,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-06-05 04:34:59,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 162. [2021-06-05 04:34:59,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 161 states have (on average 2.217391304347826) internal successors, (357), 161 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:59,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 357 transitions. [2021-06-05 04:34:59,555 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 357 transitions. Word has length 18 [2021-06-05 04:34:59,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:34:59,555 INFO L482 AbstractCegarLoop]: Abstraction has 162 states and 357 transitions. [2021-06-05 04:34:59,555 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 04:34:59,556 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 357 transitions. [2021-06-05 04:34:59,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:34:59,556 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:34:59,556 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:34:59,756 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1479,279 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:34:59,756 INFO L430 AbstractCegarLoop]: === Iteration 285 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:34:59,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:34:59,756 INFO L82 PathProgramCache]: Analyzing trace with hash 1444271778, now seen corresponding path program 279 times [2021-06-05 04:34:59,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:34:59,757 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179514565] [2021-06-05 04:34:59,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:34:59,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:34:59,930 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 04:34:59,930 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:34:59,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179514565] [2021-06-05 04:34:59,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179514565] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:34:59,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012254881] [2021-06-05 04:34:59,931 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 04:34:59,968 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:34:59,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:34:59,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:34:59,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:35:00,061 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:00,062 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:00,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:35:00,063 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:00,065 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:00,065 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 19 treesize of output 15 [2021-06-05 04:35:00,066 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:00,088 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:35:00,091 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:00,091 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:00,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 04:35:00,092 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:35:00,094 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:00,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 04:35:00,096 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:35:00,116 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:35:00,117 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 04:35:00,117 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:35 [2021-06-05 04:35:00,189 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:35:00,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1012254881] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:35:00,190 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:35:00,190 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-06-05 04:35:00,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788834336] [2021-06-05 04:35:00,190 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:35:00,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:35:00,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:35:00,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:35:00,190 INFO L87 Difference]: Start difference. First operand 162 states and 357 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:00,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:35:00,675 INFO L93 Difference]: Finished difference Result 202 states and 434 transitions. [2021-06-05 04:35:00,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:35:00,675 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 04:35:00,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:35:00,676 INFO L225 Difference]: With dead ends: 202 [2021-06-05 04:35:00,676 INFO L226 Difference]: Without dead ends: 191 [2021-06-05 04:35:00,676 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 565.3ms TimeCoverageRelationStatistics Valid=107, Invalid=705, Unknown=0, NotChecked=0, Total=812 [2021-06-05 04:35:00,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-06-05 04:35:00,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 162. [2021-06-05 04:35:00,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 161 states have (on average 2.217391304347826) internal successors, (357), 161 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:00,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 357 transitions. [2021-06-05 04:35:00,677 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 357 transitions. Word has length 18 [2021-06-05 04:35:00,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:35:00,677 INFO L482 AbstractCegarLoop]: Abstraction has 162 states and 357 transitions. [2021-06-05 04:35:00,677 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 04:35:00,677 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 357 transitions. [2021-06-05 04:35:00,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:35:00,678 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:35:00,678 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:35:00,880 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1482,280 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:35:00,881 INFO L430 AbstractCegarLoop]: === Iteration 286 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:35:00,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:35:00,881 INFO L82 PathProgramCache]: Analyzing trace with hash -662512342, now seen corresponding path program 280 times [2021-06-05 04:35:00,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:35:00,881 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552993678] [2021-06-05 04:35:00,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:35:00,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:35:01,040 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:35:01,040 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:35:01,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552993678] [2021-06-05 04:35:01,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552993678] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:35:01,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1965161223] [2021-06-05 04:35:01,041 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 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 04:35:01,064 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:35:01,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:35:01,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 04:35:01,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:35:01,201 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:01,201 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:01,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:35:01,202 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:01,205 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:01,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:35:01,206 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:01,266 INFO L628 ElimStorePlain]: treesize reduction 88, result has 45.0 percent of original size [2021-06-05 04:35:01,269 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:01,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:35:01,270 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:35:01,295 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:35:01,297 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:01,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:35:01,298 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:01,320 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:35:01,322 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:01,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 04:35:01,324 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:35:01,344 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:35:01,345 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:35:01,345 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-06-05 04:35:01,420 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:35:01,420 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1965161223] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:35:01,420 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:35:01,420 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-06-05 04:35:01,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657452026] [2021-06-05 04:35:01,420 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:35:01,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:35:01,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:35:01,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:35:01,421 INFO L87 Difference]: Start difference. First operand 162 states and 357 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:01,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:35:01,770 INFO L93 Difference]: Finished difference Result 219 states and 463 transitions. [2021-06-05 04:35:01,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:35:01,770 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 04:35:01,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:35:01,770 INFO L225 Difference]: With dead ends: 219 [2021-06-05 04:35:01,770 INFO L226 Difference]: Without dead ends: 200 [2021-06-05 04:35:01,770 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 429.2ms TimeCoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:35:01,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-06-05 04:35:01,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 163. [2021-06-05 04:35:01,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 162 states have (on average 2.2222222222222223) internal successors, (360), 162 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:01,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 360 transitions. [2021-06-05 04:35:01,772 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 360 transitions. Word has length 18 [2021-06-05 04:35:01,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:35:01,772 INFO L482 AbstractCegarLoop]: Abstraction has 163 states and 360 transitions. [2021-06-05 04:35:01,772 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 04:35:01,772 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 360 transitions. [2021-06-05 04:35:01,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:35:01,772 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:35:01,772 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:35:01,973 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 281 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1485 [2021-06-05 04:35:01,973 INFO L430 AbstractCegarLoop]: === Iteration 287 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:35:01,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:35:01,973 INFO L82 PathProgramCache]: Analyzing trace with hash 764314362, now seen corresponding path program 281 times [2021-06-05 04:35:01,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:35:01,974 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716216069] [2021-06-05 04:35:01,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:35:01,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:35:02,156 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:35:02,157 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:35:02,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716216069] [2021-06-05 04:35:02,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716216069] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:35:02,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642149149] [2021-06-05 04:35:02,157 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:35:02,185 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 04:35:02,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:35:02,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 04:35:02,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:35:02,307 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:02,308 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:02,308 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 27 treesize of output 21 [2021-06-05 04:35:02,309 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:02,311 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:02,311 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 27 treesize of output 21 [2021-06-05 04:35:02,312 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:02,333 INFO L628 ElimStorePlain]: treesize reduction 42, result has 39.1 percent of original size [2021-06-05 04:35:02,335 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:02,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:35:02,337 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:35:02,343 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:35:02,344 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 04:35:02,344 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-06-05 04:35:02,378 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:35:02,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [642149149] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:35:02,378 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:35:02,378 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-06-05 04:35:02,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682645747] [2021-06-05 04:35:02,378 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:35:02,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:35:02,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:35:02,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:35:02,379 INFO L87 Difference]: Start difference. First operand 163 states and 360 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:02,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:35:02,698 INFO L93 Difference]: Finished difference Result 203 states and 431 transitions. [2021-06-05 04:35:02,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:35:02,698 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:35:02,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:35:02,699 INFO L225 Difference]: With dead ends: 203 [2021-06-05 04:35:02,699 INFO L226 Difference]: Without dead ends: 184 [2021-06-05 04:35:02,699 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 420.0ms TimeCoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:35:02,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-06-05 04:35:02,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 168. [2021-06-05 04:35:02,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 2.215568862275449) internal successors, (370), 167 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:02,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 370 transitions. [2021-06-05 04:35:02,700 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 370 transitions. Word has length 18 [2021-06-05 04:35:02,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:35:02,700 INFO L482 AbstractCegarLoop]: Abstraction has 168 states and 370 transitions. [2021-06-05 04:35:02,700 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 04:35:02,700 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 370 transitions. [2021-06-05 04:35:02,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:35:02,701 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:35:02,701 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:35:02,912 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1490,282 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:35:02,913 INFO L430 AbstractCegarLoop]: === Iteration 288 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:35:02,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:35:02,913 INFO L82 PathProgramCache]: Analyzing trace with hash 1900499634, now seen corresponding path program 282 times [2021-06-05 04:35:02,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:35:02,913 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326165499] [2021-06-05 04:35:02,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:35:02,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:35:03,099 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:35:03,099 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:35:03,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326165499] [2021-06-05 04:35:03,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326165499] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:35:03,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984756222] [2021-06-05 04:35:03,099 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:35:03,123 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:35:03,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:35:03,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:35:03,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:35:03,208 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:03,208 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:03,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:35:03,209 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:03,211 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:03,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:35:03,212 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:03,234 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:35:03,236 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:03,237 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:03,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:35:03,238 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:35:03,240 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:03,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:35:03,242 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:35:03,262 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:35:03,263 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 04:35:03,263 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:35 [2021-06-05 04:35:03,351 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 04:35:03,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1984756222] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:35:03,351 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:35:03,351 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-06-05 04:35:03,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523747283] [2021-06-05 04:35:03,351 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:35:03,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:35:03,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:35:03,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:35:03,352 INFO L87 Difference]: Start difference. First operand 168 states and 370 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:03,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:35:03,777 INFO L93 Difference]: Finished difference Result 198 states and 427 transitions. [2021-06-05 04:35:03,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:35:03,778 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 04:35:03,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:35:03,778 INFO L225 Difference]: With dead ends: 198 [2021-06-05 04:35:03,778 INFO L226 Difference]: Without dead ends: 191 [2021-06-05 04:35:03,778 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 480.5ms TimeCoverageRelationStatistics Valid=81, Invalid=621, Unknown=0, NotChecked=0, Total=702 [2021-06-05 04:35:03,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-06-05 04:35:03,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 167. [2021-06-05 04:35:03,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 2.216867469879518) internal successors, (368), 166 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:03,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 368 transitions. [2021-06-05 04:35:03,780 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 368 transitions. Word has length 18 [2021-06-05 04:35:03,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:35:03,780 INFO L482 AbstractCegarLoop]: Abstraction has 167 states and 368 transitions. [2021-06-05 04:35:03,780 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 04:35:03,780 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 368 transitions. [2021-06-05 04:35:03,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:35:03,780 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:35:03,780 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:35:03,980 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1491,283 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:35:03,981 INFO L430 AbstractCegarLoop]: === Iteration 289 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:35:03,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:35:03,981 INFO L82 PathProgramCache]: Analyzing trace with hash -245671126, now seen corresponding path program 283 times [2021-06-05 04:35:03,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:35:03,981 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447032235] [2021-06-05 04:35:03,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:35:03,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:35:04,162 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:35:04,162 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:35:04,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447032235] [2021-06-05 04:35:04,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447032235] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:35:04,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383687995] [2021-06-05 04:35:04,162 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:35:04,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:35:04,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 04:35:04,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:35:04,297 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:04,298 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:04,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:35:04,298 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:04,301 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:04,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:35:04,302 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:04,363 INFO L628 ElimStorePlain]: treesize reduction 94, result has 42.3 percent of original size [2021-06-05 04:35:04,365 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:04,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 04:35:04,367 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:35:04,389 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:35:04,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:35:04,393 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:04,414 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:35:04,414 INFO L518 ElimStorePlain]: Eliminatee v_prenex_236 vanished before elimination [2021-06-05 04:35:04,415 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 04:35:04,415 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:173, output treesize:36 [2021-06-05 04:35:04,494 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:35:04,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1383687995] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:35:04,494 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:35:04,494 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-06-05 04:35:04,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400162368] [2021-06-05 04:35:04,494 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:35:04,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:35:04,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:35:04,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:35:04,494 INFO L87 Difference]: Start difference. First operand 167 states and 368 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:05,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:35:05,138 INFO L93 Difference]: Finished difference Result 233 states and 486 transitions. [2021-06-05 04:35:05,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 04:35:05,138 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 04:35:05,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:35:05,139 INFO L225 Difference]: With dead ends: 233 [2021-06-05 04:35:05,139 INFO L226 Difference]: Without dead ends: 211 [2021-06-05 04:35:05,139 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 699.5ms TimeCoverageRelationStatistics Valid=114, Invalid=756, Unknown=0, NotChecked=0, Total=870 [2021-06-05 04:35:05,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-06-05 04:35:05,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 165. [2021-06-05 04:35:05,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 2.2195121951219514) internal successors, (364), 164 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:05,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 364 transitions. [2021-06-05 04:35:05,140 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 364 transitions. Word has length 18 [2021-06-05 04:35:05,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:35:05,140 INFO L482 AbstractCegarLoop]: Abstraction has 165 states and 364 transitions. [2021-06-05 04:35:05,141 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 04:35:05,141 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 364 transitions. [2021-06-05 04:35:05,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:35:05,141 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:35:05,141 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:35:05,341 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 284 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1496 [2021-06-05 04:35:05,341 INFO L430 AbstractCegarLoop]: === Iteration 290 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:35:05,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:35:05,342 INFO L82 PathProgramCache]: Analyzing trace with hash 1942512050, now seen corresponding path program 284 times [2021-06-05 04:35:05,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:35:05,342 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139784868] [2021-06-05 04:35:05,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:35:05,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:35:05,488 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:35:05,488 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:35:05,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139784868] [2021-06-05 04:35:05,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139784868] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:35:05,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [801817589] [2021-06-05 04:35:05,488 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 04:35:05,523 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:35:05,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:35:05,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:35:05,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:35:05,621 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:05,621 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:05,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:35:05,622 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:05,624 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:05,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:35:05,625 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:05,646 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:35:05,649 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:05,649 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:05,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 04:35:05,650 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:35:05,653 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:05,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:35:05,654 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:35:05,675 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:35:05,676 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 04:35:05,676 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:35 [2021-06-05 04:35:05,752 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:35:05,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [801817589] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:35:05,752 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:35:05,752 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-06-05 04:35:05,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785283825] [2021-06-05 04:35:05,752 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:35:05,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:35:05,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:35:05,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:35:05,752 INFO L87 Difference]: Start difference. First operand 165 states and 364 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:06,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:35:06,233 INFO L93 Difference]: Finished difference Result 198 states and 430 transitions. [2021-06-05 04:35:06,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:35:06,233 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 04:35:06,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:35:06,233 INFO L225 Difference]: With dead ends: 198 [2021-06-05 04:35:06,233 INFO L226 Difference]: Without dead ends: 189 [2021-06-05 04:35:06,233 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 501.0ms TimeCoverageRelationStatistics Valid=86, Invalid=616, Unknown=0, NotChecked=0, Total=702 [2021-06-05 04:35:06,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-06-05 04:35:06,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 166. [2021-06-05 04:35:06,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 165 states have (on average 2.224242424242424) internal successors, (367), 165 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:06,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 367 transitions. [2021-06-05 04:35:06,235 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 367 transitions. Word has length 18 [2021-06-05 04:35:06,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:35:06,235 INFO L482 AbstractCegarLoop]: Abstraction has 166 states and 367 transitions. [2021-06-05 04:35:06,235 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 04:35:06,235 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 367 transitions. [2021-06-05 04:35:06,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:35:06,235 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:35:06,235 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:35:06,437 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 285 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1501 [2021-06-05 04:35:06,437 INFO L430 AbstractCegarLoop]: === Iteration 291 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:35:06,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:35:06,437 INFO L82 PathProgramCache]: Analyzing trace with hash 1056713770, now seen corresponding path program 285 times [2021-06-05 04:35:06,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:35:06,437 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801311592] [2021-06-05 04:35:06,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:35:06,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:35:06,753 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:35:06,753 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:35:06,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801311592] [2021-06-05 04:35:06,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801311592] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:35:06,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002533874] [2021-06-05 04:35:06,753 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 04:35:06,786 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:35:06,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:35:06,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:35:06,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:35:07,052 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:07,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:35:07,053 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:07,082 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:35:07,085 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:07,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:35:07,086 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:07,111 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:35:07,114 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:07,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 04:35:07,116 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:35:07,140 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:35:07,143 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:07,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:35:07,145 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:35:07,171 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:35:07,173 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 04:35:07,173 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:77, output treesize:35 [2021-06-05 04:35:07,286 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:35:07,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1002533874] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:35:07,286 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:35:07,286 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-06-05 04:35:07,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081688365] [2021-06-05 04:35:07,286 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:35:07,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:35:07,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:35:07,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:35:07,287 INFO L87 Difference]: Start difference. First operand 166 states and 367 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:07,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:35:07,633 INFO L93 Difference]: Finished difference Result 204 states and 435 transitions. [2021-06-05 04:35:07,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:35:07,634 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 04:35:07,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:35:07,634 INFO L225 Difference]: With dead ends: 204 [2021-06-05 04:35:07,634 INFO L226 Difference]: Without dead ends: 190 [2021-06-05 04:35:07,634 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 647.3ms TimeCoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:35:07,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-06-05 04:35:07,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 167. [2021-06-05 04:35:07,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 2.2289156626506026) internal successors, (370), 166 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:07,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 370 transitions. [2021-06-05 04:35:07,636 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 370 transitions. Word has length 18 [2021-06-05 04:35:07,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:35:07,636 INFO L482 AbstractCegarLoop]: Abstraction has 167 states and 370 transitions. [2021-06-05 04:35:07,636 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 04:35:07,636 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 370 transitions. [2021-06-05 04:35:07,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:35:07,636 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:35:07,636 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:35:07,836 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 286 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1504 [2021-06-05 04:35:07,837 INFO L430 AbstractCegarLoop]: === Iteration 292 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:35:07,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:35:07,837 INFO L82 PathProgramCache]: Analyzing trace with hash -508619346, now seen corresponding path program 286 times [2021-06-05 04:35:07,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:35:07,837 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935263855] [2021-06-05 04:35:07,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:35:07,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:35:07,990 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 04:35:07,990 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:35:07,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935263855] [2021-06-05 04:35:07,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935263855] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:35:07,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642700833] [2021-06-05 04:35:07,991 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 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 04:35:08,015 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:35:08,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:35:08,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 04:35:08,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:35:08,119 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:08,120 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:08,120 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 27 treesize of output 21 [2021-06-05 04:35:08,121 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:08,123 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:08,123 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 27 treesize of output 21 [2021-06-05 04:35:08,124 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:08,147 INFO L628 ElimStorePlain]: treesize reduction 48, result has 36.0 percent of original size [2021-06-05 04:35:08,149 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:08,149 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 10 treesize of output 6 [2021-06-05 04:35:08,151 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:35:08,157 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:35:08,158 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 04:35:08,158 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-06-05 04:35:08,200 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:35:08,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [642700833] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:35:08,200 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:35:08,201 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-06-05 04:35:08,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935947143] [2021-06-05 04:35:08,201 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:35:08,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:35:08,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:35:08,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:35:08,201 INFO L87 Difference]: Start difference. First operand 167 states and 370 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:08,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:35:08,517 INFO L93 Difference]: Finished difference Result 193 states and 412 transitions. [2021-06-05 04:35:08,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:35:08,517 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 04:35:08,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:35:08,517 INFO L225 Difference]: With dead ends: 193 [2021-06-05 04:35:08,517 INFO L226 Difference]: Without dead ends: 180 [2021-06-05 04:35:08,517 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 375.4ms TimeCoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:35:08,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2021-06-05 04:35:08,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 168. [2021-06-05 04:35:08,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 2.2275449101796405) internal successors, (372), 167 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:08,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 372 transitions. [2021-06-05 04:35:08,519 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 372 transitions. Word has length 18 [2021-06-05 04:35:08,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:35:08,519 INFO L482 AbstractCegarLoop]: Abstraction has 168 states and 372 transitions. [2021-06-05 04:35:08,519 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 04:35:08,519 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 372 transitions. [2021-06-05 04:35:08,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:35:08,519 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:35:08,519 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:35:08,720 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1511,287 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:35:08,720 INFO L430 AbstractCegarLoop]: === Iteration 293 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:35:08,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:35:08,720 INFO L82 PathProgramCache]: Analyzing trace with hash 627565926, now seen corresponding path program 287 times [2021-06-05 04:35:08,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:35:08,720 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771593057] [2021-06-05 04:35:08,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:35:08,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:35:08,900 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:35:08,900 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:35:08,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771593057] [2021-06-05 04:35:08,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771593057] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:35:08,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911678629] [2021-06-05 04:35:08,900 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:35:08,927 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:35:08,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:35:08,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 04:35:08,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:35:09,007 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:09,008 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:09,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:35:09,009 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:09,011 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:09,011 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:09,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:35:09,012 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:09,015 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:09,015 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:09,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:35:09,016 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:09,018 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:09,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:35:09,019 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:09,073 INFO L628 ElimStorePlain]: treesize reduction 77, result has 46.5 percent of original size [2021-06-05 04:35:09,075 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:09,075 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:09,076 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 13 treesize of output 9 [2021-06-05 04:35:09,077 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:35:09,079 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:09,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:35:09,080 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:35:09,103 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:35:09,104 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:35:09,104 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:173, output treesize:38 [2021-06-05 04:35:09,180 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 04:35:09,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1911678629] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:35:09,180 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:35:09,180 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-06-05 04:35:09,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298118856] [2021-06-05 04:35:09,180 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:35:09,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:35:09,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:35:09,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:35:09,180 INFO L87 Difference]: Start difference. First operand 168 states and 372 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:09,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:35:09,785 INFO L93 Difference]: Finished difference Result 228 states and 470 transitions. [2021-06-05 04:35:09,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 04:35:09,785 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 04:35:09,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:35:09,785 INFO L225 Difference]: With dead ends: 228 [2021-06-05 04:35:09,785 INFO L226 Difference]: Without dead ends: 204 [2021-06-05 04:35:09,785 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 605.7ms TimeCoverageRelationStatistics Valid=98, Invalid=714, Unknown=0, NotChecked=0, Total=812 [2021-06-05 04:35:09,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-06-05 04:35:09,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 163. [2021-06-05 04:35:09,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 162 states have (on average 2.234567901234568) internal successors, (362), 162 states have internal predecessors, (362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:09,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 362 transitions. [2021-06-05 04:35:09,788 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 362 transitions. Word has length 18 [2021-06-05 04:35:09,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:35:09,788 INFO L482 AbstractCegarLoop]: Abstraction has 163 states and 362 transitions. [2021-06-05 04:35:09,788 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 04:35:09,788 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 362 transitions. [2021-06-05 04:35:09,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:35:09,788 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:35:09,788 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:35:10,010 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 288 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1512 [2021-06-05 04:35:10,010 INFO L430 AbstractCegarLoop]: === Iteration 294 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:35:10,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:35:10,011 INFO L82 PathProgramCache]: Analyzing trace with hash -1518604834, now seen corresponding path program 288 times [2021-06-05 04:35:10,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:35:10,011 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602547096] [2021-06-05 04:35:10,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:35:10,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:35:10,189 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:35:10,189 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:35:10,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602547096] [2021-06-05 04:35:10,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602547096] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:35:10,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167728641] [2021-06-05 04:35:10,190 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 04:35:10,214 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:35:10,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:35:10,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 04:35:10,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:35:10,313 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:10,314 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:10,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:35:10,315 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:10,317 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:10,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:35:10,318 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:10,377 INFO L628 ElimStorePlain]: treesize reduction 88, result has 45.0 percent of original size [2021-06-05 04:35:10,380 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:10,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:35:10,382 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:35:10,405 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:35:10,407 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:10,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:35:10,408 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:10,430 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:35:10,432 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:10,433 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 10 treesize of output 6 [2021-06-05 04:35:10,434 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:35:10,455 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:35:10,456 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 04:35:10,456 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-06-05 04:35:10,532 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:35:10,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [167728641] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:35:10,532 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:35:10,532 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-06-05 04:35:10,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029553841] [2021-06-05 04:35:10,532 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:35:10,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:35:10,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:35:10,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:35:10,532 INFO L87 Difference]: Start difference. First operand 163 states and 362 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:11,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:35:11,226 INFO L93 Difference]: Finished difference Result 244 states and 502 transitions. [2021-06-05 04:35:11,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 04:35:11,227 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 04:35:11,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:35:11,227 INFO L225 Difference]: With dead ends: 244 [2021-06-05 04:35:11,227 INFO L226 Difference]: Without dead ends: 218 [2021-06-05 04:35:11,227 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 732.0ms TimeCoverageRelationStatistics Valid=124, Invalid=806, Unknown=0, NotChecked=0, Total=930 [2021-06-05 04:35:11,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2021-06-05 04:35:11,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 168. [2021-06-05 04:35:11,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 2.2395209580838324) internal successors, (374), 167 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:11,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 374 transitions. [2021-06-05 04:35:11,229 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 374 transitions. Word has length 18 [2021-06-05 04:35:11,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:35:11,229 INFO L482 AbstractCegarLoop]: Abstraction has 168 states and 374 transitions. [2021-06-05 04:35:11,229 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 04:35:11,229 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 374 transitions. [2021-06-05 04:35:11,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:35:11,229 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:35:11,229 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:35:11,429 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1515,289 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:35:11,430 INFO L430 AbstractCegarLoop]: === Iteration 295 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:35:11,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:35:11,430 INFO L82 PathProgramCache]: Analyzing trace with hash 669578342, now seen corresponding path program 289 times [2021-06-05 04:35:11,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:35:11,430 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812428359] [2021-06-05 04:35:11,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:35:11,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:35:11,571 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:35:11,572 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:35:11,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812428359] [2021-06-05 04:35:11,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812428359] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:35:11,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644589187] [2021-06-05 04:35:11,572 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 04:35:11,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:35:11,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 04:35:11,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:35:11,724 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:11,724 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:11,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:35:11,725 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:11,728 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:11,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:35:11,729 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:11,792 INFO L628 ElimStorePlain]: treesize reduction 88, result has 46.0 percent of original size [2021-06-05 04:35:11,795 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:11,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 04:35:11,796 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:35:11,820 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:35:11,823 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:11,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:35:11,824 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:11,845 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:35:11,848 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:11,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:35:11,849 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:35:11,870 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:35:11,871 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 04:35:11,871 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-06-05 04:35:11,946 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 04:35:11,946 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [644589187] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:35:11,946 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:35:11,946 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-06-05 04:35:11,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895090231] [2021-06-05 04:35:11,946 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:35:11,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:35:11,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:35:11,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:35:11,947 INFO L87 Difference]: Start difference. First operand 168 states and 374 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:12,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:35:12,287 INFO L93 Difference]: Finished difference Result 215 states and 459 transitions. [2021-06-05 04:35:12,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:35:12,287 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 04:35:12,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:35:12,288 INFO L225 Difference]: With dead ends: 215 [2021-06-05 04:35:12,288 INFO L226 Difference]: Without dead ends: 200 [2021-06-05 04:35:12,288 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 434.9ms TimeCoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:35:12,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-06-05 04:35:12,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 167. [2021-06-05 04:35:12,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 2.2349397590361444) internal successors, (371), 166 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:12,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 371 transitions. [2021-06-05 04:35:12,290 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 371 transitions. Word has length 18 [2021-06-05 04:35:12,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:35:12,290 INFO L482 AbstractCegarLoop]: Abstraction has 167 states and 371 transitions. [2021-06-05 04:35:12,290 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 04:35:12,290 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 371 transitions. [2021-06-05 04:35:12,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:35:12,290 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:35:12,290 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:35:12,490 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 290 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1520 [2021-06-05 04:35:12,490 INFO L430 AbstractCegarLoop]: === Iteration 296 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:35:12,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:35:12,491 INFO L82 PathProgramCache]: Analyzing trace with hash -216219938, now seen corresponding path program 290 times [2021-06-05 04:35:12,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:35:12,491 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224275193] [2021-06-05 04:35:12,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:35:12,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:35:12,703 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:35:12,703 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:35:12,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224275193] [2021-06-05 04:35:12,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224275193] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:35:12,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [711974183] [2021-06-05 04:35:12,703 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 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 04:35:12,727 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:35:12,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:35:12,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:35:12,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:35:12,819 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:12,820 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:12,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:35:12,821 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:12,823 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:12,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:35:12,824 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:12,846 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:35:12,848 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:12,849 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:12,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:35:12,850 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:35:12,852 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:12,852 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 10 treesize of output 6 [2021-06-05 04:35:12,853 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:35:12,874 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:35:12,874 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 04:35:12,875 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:35 [2021-06-05 04:35:12,957 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:35:12,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [711974183] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:35:12,957 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:35:12,957 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-06-05 04:35:12,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607984672] [2021-06-05 04:35:12,957 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:35:12,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:35:12,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:35:12,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:35:12,958 INFO L87 Difference]: Start difference. First operand 167 states and 371 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:13,695 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 63 [2021-06-05 04:35:14,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:35:14,092 INFO L93 Difference]: Finished difference Result 290 states and 589 transitions. [2021-06-05 04:35:14,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:35:14,092 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 04:35:14,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:35:14,093 INFO L225 Difference]: With dead ends: 290 [2021-06-05 04:35:14,093 INFO L226 Difference]: Without dead ends: 253 [2021-06-05 04:35:14,093 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 1117.0ms TimeCoverageRelationStatistics Valid=141, Invalid=851, Unknown=0, NotChecked=0, Total=992 [2021-06-05 04:35:14,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2021-06-05 04:35:14,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 171. [2021-06-05 04:35:14,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 2.2529411764705882) internal successors, (383), 170 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:14,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 383 transitions. [2021-06-05 04:35:14,095 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 383 transitions. Word has length 18 [2021-06-05 04:35:14,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:35:14,095 INFO L482 AbstractCegarLoop]: Abstraction has 171 states and 383 transitions. [2021-06-05 04:35:14,095 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 04:35:14,095 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 383 transitions. [2021-06-05 04:35:14,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:35:14,095 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:35:14,095 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:35:14,295 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1525,291 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:35:14,295 INFO L430 AbstractCegarLoop]: === Iteration 297 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:35:14,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:35:14,296 INFO L82 PathProgramCache]: Analyzing trace with hash 1543833002, now seen corresponding path program 291 times [2021-06-05 04:35:14,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:35:14,296 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857602613] [2021-06-05 04:35:14,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:35:14,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:35:14,504 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:35:14,504 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:35:14,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857602613] [2021-06-05 04:35:14,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857602613] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:35:14,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [973732668] [2021-06-05 04:35:14,505 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 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 04:35:14,529 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:35:14,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:35:14,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:35:14,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:35:14,709 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:14,710 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 19 treesize of output 15 [2021-06-05 04:35:14,710 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:14,732 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:35:14,734 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:14,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:35:14,736 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:35:14,757 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:35:14,759 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:14,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:35:14,760 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:14,779 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:35:14,781 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:14,781 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 10 treesize of output 6 [2021-06-05 04:35:14,782 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:35:14,801 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:35:14,802 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 04:35:14,802 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:77, output treesize:35 [2021-06-05 04:35:14,897 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:35:14,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [973732668] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:35:14,897 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:35:14,897 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-06-05 04:35:14,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197695265] [2021-06-05 04:35:14,897 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:35:14,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:35:14,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:35:14,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:35:14,897 INFO L87 Difference]: Start difference. First operand 171 states and 383 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:15,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:35:15,197 INFO L93 Difference]: Finished difference Result 240 states and 509 transitions. [2021-06-05 04:35:15,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:35:15,197 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 04:35:15,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:35:15,198 INFO L225 Difference]: With dead ends: 240 [2021-06-05 04:35:15,198 INFO L226 Difference]: Without dead ends: 226 [2021-06-05 04:35:15,198 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 482.7ms TimeCoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:35:15,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-06-05 04:35:15,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 174. [2021-06-05 04:35:15,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 173 states have (on average 2.2485549132947975) internal successors, (389), 173 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:15,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 389 transitions. [2021-06-05 04:35:15,200 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 389 transitions. Word has length 18 [2021-06-05 04:35:15,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:35:15,200 INFO L482 AbstractCegarLoop]: Abstraction has 174 states and 389 transitions. [2021-06-05 04:35:15,200 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 04:35:15,200 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 389 transitions. [2021-06-05 04:35:15,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:35:15,200 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:35:15,200 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:35:15,400 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 292 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1528 [2021-06-05 04:35:15,401 INFO L430 AbstractCegarLoop]: === Iteration 298 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:35:15,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:35:15,401 INFO L82 PathProgramCache]: Analyzing trace with hash 444669190, now seen corresponding path program 292 times [2021-06-05 04:35:15,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:35:15,401 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376175357] [2021-06-05 04:35:15,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:35:15,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:35:15,484 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:35:15,484 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:35:15,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376175357] [2021-06-05 04:35:15,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376175357] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:35:15,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [733428495] [2021-06-05 04:35:15,484 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:35:15,512 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:35:15,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:35:15,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 04:35:15,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:35:15,613 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 24 treesize of output 18 [2021-06-05 04:35:15,614 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:15,615 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 24 treesize of output 18 [2021-06-05 04:35:15,616 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:15,628 INFO L628 ElimStorePlain]: treesize reduction 22, result has 29.0 percent of original size [2021-06-05 04:35:15,628 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 04:35:15,629 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:35:15,629 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:65, output treesize:9 [2021-06-05 04:35:15,644 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 04:35:15,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [733428495] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:35:15,644 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:35:15,644 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-05 04:35:15,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908009815] [2021-06-05 04:35:15,644 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:35:15,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:35:15,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:35:15,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:35:15,645 INFO L87 Difference]: Start difference. First operand 174 states and 389 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:15,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:35:15,757 INFO L93 Difference]: Finished difference Result 221 states and 476 transitions. [2021-06-05 04:35:15,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:35:15,757 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:35:15,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:35:15,757 INFO L225 Difference]: With dead ends: 221 [2021-06-05 04:35:15,757 INFO L226 Difference]: Without dead ends: 221 [2021-06-05 04:35:15,757 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 163.6ms TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:35:15,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2021-06-05 04:35:15,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 175. [2021-06-05 04:35:15,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 2.2528735632183907) internal successors, (392), 174 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:15,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 392 transitions. [2021-06-05 04:35:15,759 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 392 transitions. Word has length 19 [2021-06-05 04:35:15,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:35:15,759 INFO L482 AbstractCegarLoop]: Abstraction has 175 states and 392 transitions. [2021-06-05 04:35:15,759 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:15,759 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 392 transitions. [2021-06-05 04:35:15,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:35:15,759 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:35:15,759 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:35:15,960 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1535,293 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:35:15,960 INFO L430 AbstractCegarLoop]: === Iteration 299 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:35:15,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:35:15,960 INFO L82 PathProgramCache]: Analyzing trace with hash 537921546, now seen corresponding path program 293 times [2021-06-05 04:35:15,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:35:15,960 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917747472] [2021-06-05 04:35:15,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:35:15,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:35:16,045 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:35:16,045 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:35:16,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917747472] [2021-06-05 04:35:16,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917747472] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:35:16,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584263184] [2021-06-05 04:35:16,046 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:35:16,072 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:35:16,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:35:16,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:35:16,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:35:16,224 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:35:16,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [584263184] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:35:16,224 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:35:16,224 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 04:35:16,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469447123] [2021-06-05 04:35:16,224 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:35:16,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:35:16,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:35:16,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:35:16,224 INFO L87 Difference]: Start difference. First operand 175 states and 392 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:16,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:35:16,720 INFO L93 Difference]: Finished difference Result 218 states and 464 transitions. [2021-06-05 04:35:16,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:35:16,720 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:35:16,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:35:16,721 INFO L225 Difference]: With dead ends: 218 [2021-06-05 04:35:16,721 INFO L226 Difference]: Without dead ends: 206 [2021-06-05 04:35:16,721 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 531.1ms TimeCoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:35:16,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2021-06-05 04:35:16,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 174. [2021-06-05 04:35:16,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 173 states have (on average 2.2485549132947975) internal successors, (389), 173 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:16,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 389 transitions. [2021-06-05 04:35:16,722 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 389 transitions. Word has length 19 [2021-06-05 04:35:16,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:35:16,722 INFO L482 AbstractCegarLoop]: Abstraction has 174 states and 389 transitions. [2021-06-05 04:35:16,722 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 04:35:16,723 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 389 transitions. [2021-06-05 04:35:16,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:35:16,723 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:35:16,723 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:35:16,923 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 294 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1537 [2021-06-05 04:35:16,923 INFO L430 AbstractCegarLoop]: === Iteration 300 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:35:16,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:35:16,924 INFO L82 PathProgramCache]: Analyzing trace with hash -520230954, now seen corresponding path program 294 times [2021-06-05 04:35:16,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:35:16,924 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938578468] [2021-06-05 04:35:16,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:35:16,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:35:17,001 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:35:17,002 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:35:17,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938578468] [2021-06-05 04:35:17,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938578468] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:35:17,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003815671] [2021-06-05 04:35:17,002 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:35:17,028 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:35:17,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:35:17,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 04:35:17,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:35:17,167 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:17,167 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:17,168 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 17 treesize of output 13 [2021-06-05 04:35:17,168 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:17,170 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:17,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:35:17,171 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:17,188 INFO L628 ElimStorePlain]: treesize reduction 34, result has 30.6 percent of original size [2021-06-05 04:35:17,188 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 04:35:17,189 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 04:35:17,189 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:63, output treesize:9 [2021-06-05 04:35:17,206 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 04:35:17,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1003815671] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:35:17,206 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:35:17,206 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 04:35:17,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761042423] [2021-06-05 04:35:17,206 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:35:17,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:35:17,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:35:17,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:35:17,206 INFO L87 Difference]: Start difference. First operand 174 states and 389 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:17,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:35:17,427 INFO L93 Difference]: Finished difference Result 238 states and 510 transitions. [2021-06-05 04:35:17,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:35:17,428 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 04:35:17,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:35:17,428 INFO L225 Difference]: With dead ends: 238 [2021-06-05 04:35:17,428 INFO L226 Difference]: Without dead ends: 238 [2021-06-05 04:35:17,428 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 243.4ms TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:35:17,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2021-06-05 04:35:17,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 175. [2021-06-05 04:35:17,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 2.2471264367816093) internal successors, (391), 174 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:17,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 391 transitions. [2021-06-05 04:35:17,431 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 391 transitions. Word has length 19 [2021-06-05 04:35:17,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:35:17,431 INFO L482 AbstractCegarLoop]: Abstraction has 175 states and 391 transitions. [2021-06-05 04:35:17,431 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 04:35:17,431 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 391 transitions. [2021-06-05 04:35:17,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:35:17,431 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:35:17,431 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:35:17,653 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1542,295 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:35:17,653 INFO L430 AbstractCegarLoop]: === Iteration 301 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:35:17,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:35:17,654 INFO L82 PathProgramCache]: Analyzing trace with hash -453676026, now seen corresponding path program 295 times [2021-06-05 04:35:17,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:35:17,654 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511709436] [2021-06-05 04:35:17,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:35:17,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:35:17,753 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:35:17,753 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:35:17,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511709436] [2021-06-05 04:35:17,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511709436] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:35:17,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989374023] [2021-06-05 04:35:17,753 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:35:17,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:35:17,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 04:35:17,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:35:17,980 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:17,980 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:17,980 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 17 treesize of output 13 [2021-06-05 04:35:17,981 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:17,984 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:17,984 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 17 treesize of output 13 [2021-06-05 04:35:17,985 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:18,007 INFO L628 ElimStorePlain]: treesize reduction 28, result has 42.9 percent of original size [2021-06-05 04:35:18,009 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:18,010 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 9 treesize of output 5 [2021-06-05 04:35:18,011 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:35:18,018 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:35:18,019 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 04:35:18,019 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:63, output treesize:9 [2021-06-05 04:35:18,040 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 04:35:18,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1989374023] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:35:18,040 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:35:18,040 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 04:35:18,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608712364] [2021-06-05 04:35:18,040 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:35:18,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:35:18,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:35:18,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:35:18,041 INFO L87 Difference]: Start difference. First operand 175 states and 391 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:18,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:35:18,279 INFO L93 Difference]: Finished difference Result 235 states and 504 transitions. [2021-06-05 04:35:18,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:35:18,279 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 04:35:18,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:35:18,279 INFO L225 Difference]: With dead ends: 235 [2021-06-05 04:35:18,279 INFO L226 Difference]: Without dead ends: 235 [2021-06-05 04:35:18,280 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 310.0ms TimeCoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:35:18,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2021-06-05 04:35:18,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 176. [2021-06-05 04:35:18,281 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 04:35:18,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 393 transitions. [2021-06-05 04:35:18,282 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 393 transitions. Word has length 19 [2021-06-05 04:35:18,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:35:18,282 INFO L482 AbstractCegarLoop]: Abstraction has 176 states and 393 transitions. [2021-06-05 04:35:18,282 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 04:35:18,282 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 393 transitions. [2021-06-05 04:35:18,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:35:18,282 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:35:18,282 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:35:18,503 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 296 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1544 [2021-06-05 04:35:18,503 INFO L430 AbstractCegarLoop]: === Iteration 302 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:35:18,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:35:18,503 INFO L82 PathProgramCache]: Analyzing trace with hash -1698455082, now seen corresponding path program 296 times [2021-06-05 04:35:18,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:35:18,504 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858073135] [2021-06-05 04:35:18,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:35:18,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:35:18,606 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:35:18,607 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:35:18,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858073135] [2021-06-05 04:35:18,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858073135] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:35:18,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126197787] [2021-06-05 04:35:18,607 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 04:35:18,635 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:35:18,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:35:18,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 04:35:18,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:35:18,827 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:18,827 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:18,827 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 17 treesize of output 13 [2021-06-05 04:35:18,828 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:18,830 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:18,830 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 17 treesize of output 13 [2021-06-05 04:35:18,831 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:18,848 INFO L628 ElimStorePlain]: treesize reduction 34, result has 30.6 percent of original size [2021-06-05 04:35:18,848 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 04:35:18,849 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 04:35:18,849 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:63, output treesize:9 [2021-06-05 04:35:18,866 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 04:35:18,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [126197787] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:35:18,866 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:35:18,866 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 04:35:18,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763621001] [2021-06-05 04:35:18,866 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:35:18,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:35:18,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:35:18,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:35:18,867 INFO L87 Difference]: Start difference. First operand 176 states and 393 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:19,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:35:19,167 INFO L93 Difference]: Finished difference Result 232 states and 498 transitions. [2021-06-05 04:35:19,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:35:19,167 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 04:35:19,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:35:19,168 INFO L225 Difference]: With dead ends: 232 [2021-06-05 04:35:19,168 INFO L226 Difference]: Without dead ends: 232 [2021-06-05 04:35:19,168 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 323.3ms TimeCoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:35:19,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2021-06-05 04:35:19,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 177. [2021-06-05 04:35:19,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 176 states have (on average 2.2443181818181817) internal successors, (395), 176 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:19,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 395 transitions. [2021-06-05 04:35:19,170 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 395 transitions. Word has length 19 [2021-06-05 04:35:19,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:35:19,170 INFO L482 AbstractCegarLoop]: Abstraction has 177 states and 395 transitions. [2021-06-05 04:35:19,170 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 04:35:19,170 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 395 transitions. [2021-06-05 04:35:19,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:35:19,170 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:35:19,170 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:35:19,370 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 297 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1546 [2021-06-05 04:35:19,371 INFO L430 AbstractCegarLoop]: === Iteration 303 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:35:19,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:35:19,371 INFO L82 PathProgramCache]: Analyzing trace with hash 1810458194, now seen corresponding path program 297 times [2021-06-05 04:35:19,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:35:19,371 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980547347] [2021-06-05 04:35:19,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:35:19,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:35:19,475 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 04:35:19,475 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:35:19,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980547347] [2021-06-05 04:35:19,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980547347] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:35:19,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140156988] [2021-06-05 04:35:19,475 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:35:19,501 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:35:19,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:35:19,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:35:19,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:35:19,669 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:19,669 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:19,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:35:19,670 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:19,673 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:19,673 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 16 treesize of output 12 [2021-06-05 04:35:19,679 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:19,718 INFO L628 ElimStorePlain]: treesize reduction 60, result has 38.8 percent of original size [2021-06-05 04:35:19,718 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 04:35:19,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index 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 04:35:19,721 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:19,733 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:35:19,733 INFO L518 ElimStorePlain]: Eliminatee v_prenex_256 vanished before elimination [2021-06-05 04:35:19,734 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 04:35:19,734 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-06-05 04:35:19,763 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:35:19,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2140156988] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:35:19,763 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:35:19,763 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 04:35:19,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474045340] [2021-06-05 04:35:19,763 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:35:19,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:35:19,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:35:19,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:35:19,764 INFO L87 Difference]: Start difference. First operand 177 states and 395 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:20,455 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 66 [2021-06-05 04:35:20,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:35:20,595 INFO L93 Difference]: Finished difference Result 227 states and 479 transitions. [2021-06-05 04:35:20,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:35:20,595 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:35:20,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:35:20,595 INFO L225 Difference]: With dead ends: 227 [2021-06-05 04:35:20,595 INFO L226 Difference]: Without dead ends: 224 [2021-06-05 04:35:20,595 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 833.4ms TimeCoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:35:20,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-06-05 04:35:20,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 182. [2021-06-05 04:35:20,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 181 states have (on average 2.2430939226519335) internal successors, (406), 181 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:20,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 406 transitions. [2021-06-05 04:35:20,597 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 406 transitions. Word has length 19 [2021-06-05 04:35:20,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:35:20,597 INFO L482 AbstractCegarLoop]: Abstraction has 182 states and 406 transitions. [2021-06-05 04:35:20,597 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:20,597 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 406 transitions. [2021-06-05 04:35:20,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:35:20,597 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:35:20,597 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:35:20,798 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1548,298 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:35:20,798 INFO L430 AbstractCegarLoop]: === Iteration 304 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:35:20,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:35:20,798 INFO L82 PathProgramCache]: Analyzing trace with hash 1586526726, now seen corresponding path program 298 times [2021-06-05 04:35:20,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:35:20,798 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841048193] [2021-06-05 04:35:20,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:35:20,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:35:20,877 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:35:20,878 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:35:20,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841048193] [2021-06-05 04:35:20,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841048193] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:35:20,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419510597] [2021-06-05 04:35:20,878 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:35:20,902 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:35:20,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:35:20,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 04:35:20,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:35:21,044 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:21,044 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:21,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:35:21,045 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:21,047 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:21,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:35:21,048 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:21,093 INFO L628 ElimStorePlain]: treesize reduction 80, result has 35.0 percent of original size [2021-06-05 04:35:21,093 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 04:35:21,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:35:21,096 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:21,111 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:35:21,111 INFO L518 ElimStorePlain]: Eliminatee v_prenex_259 vanished before elimination [2021-06-05 04:35:21,112 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 04:35:21,112 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:133, output treesize:22 [2021-06-05 04:35:21,159 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:35:21,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [419510597] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:35:21,159 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:35:21,159 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 04:35:21,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416815385] [2021-06-05 04:35:21,159 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:35:21,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:35:21,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:35:21,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:35:21,159 INFO L87 Difference]: Start difference. First operand 182 states and 406 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:21,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:35:21,429 INFO L93 Difference]: Finished difference Result 233 states and 501 transitions. [2021-06-05 04:35:21,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:35:21,430 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 04:35:21,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:35:21,430 INFO L225 Difference]: With dead ends: 233 [2021-06-05 04:35:21,430 INFO L226 Difference]: Without dead ends: 233 [2021-06-05 04:35:21,430 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 315.1ms TimeCoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:35:21,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2021-06-05 04:35:21,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 182. [2021-06-05 04:35:21,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 181 states have (on average 2.2430939226519335) internal successors, (406), 181 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:21,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 406 transitions. [2021-06-05 04:35:21,432 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 406 transitions. Word has length 19 [2021-06-05 04:35:21,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:35:21,432 INFO L482 AbstractCegarLoop]: Abstraction has 182 states and 406 transitions. [2021-06-05 04:35:21,432 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 04:35:21,432 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 406 transitions. [2021-06-05 04:35:21,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:35:21,432 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:35:21,432 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:35:21,632 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1556,299 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:35:21,633 INFO L430 AbstractCegarLoop]: === Iteration 305 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:35:21,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:35:21,633 INFO L82 PathProgramCache]: Analyzing trace with hash -1348323830, now seen corresponding path program 299 times [2021-06-05 04:35:21,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:35:21,633 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257793010] [2021-06-05 04:35:21,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:35:21,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:35:21,753 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:35:21,753 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:35:21,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257793010] [2021-06-05 04:35:21,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257793010] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:35:21,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1699535516] [2021-06-05 04:35:21,753 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:35:21,778 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:35:21,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:35:21,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:35:21,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:35:21,958 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:21,959 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:21,959 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 15 treesize of output 11 [2021-06-05 04:35:21,960 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:21,962 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:21,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:35:21,963 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:22,001 INFO L628 ElimStorePlain]: treesize reduction 68, result has 36.4 percent of original size [2021-06-05 04:35:22,002 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 04:35:22,003 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 04:35:22,004 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:22,016 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:35:22,016 INFO L518 ElimStorePlain]: Eliminatee v_prenex_262 vanished before elimination [2021-06-05 04:35:22,017 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 04:35:22,017 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-06-05 04:35:22,045 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:35:22,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1699535516] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:35:22,046 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:35:22,046 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 04:35:22,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165734054] [2021-06-05 04:35:22,046 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:35:22,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:35:22,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:35:22,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:35:22,046 INFO L87 Difference]: Start difference. First operand 182 states and 406 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:22,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:35:22,527 INFO L93 Difference]: Finished difference Result 212 states and 458 transitions. [2021-06-05 04:35:22,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:35:22,527 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:35:22,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:35:22,527 INFO L225 Difference]: With dead ends: 212 [2021-06-05 04:35:22,527 INFO L226 Difference]: Without dead ends: 212 [2021-06-05 04:35:22,527 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 562.4ms TimeCoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:35:22,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2021-06-05 04:35:22,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 178. [2021-06-05 04:35:22,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 2.2429378531073447) internal successors, (397), 177 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:22,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 397 transitions. [2021-06-05 04:35:22,529 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 397 transitions. Word has length 19 [2021-06-05 04:35:22,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:35:22,529 INFO L482 AbstractCegarLoop]: Abstraction has 178 states and 397 transitions. [2021-06-05 04:35:22,529 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 04:35:22,529 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 397 transitions. [2021-06-05 04:35:22,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:35:22,529 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:35:22,529 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:35:22,730 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1560,300 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:35:22,730 INFO L430 AbstractCegarLoop]: === Iteration 306 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:35:22,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:35:22,730 INFO L82 PathProgramCache]: Analyzing trace with hash -944542190, now seen corresponding path program 300 times [2021-06-05 04:35:22,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:35:22,730 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659194098] [2021-06-05 04:35:22,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:35:22,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:35:22,803 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:35:22,803 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:35:22,803 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659194098] [2021-06-05 04:35:22,803 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659194098] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:35:22,803 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31819173] [2021-06-05 04:35:22,803 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:35:22,830 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:35:22,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:35:22,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 04:35:22,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:35:22,977 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:22,978 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:22,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:35:22,979 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:22,982 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:22,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:35:22,983 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:23,003 INFO L628 ElimStorePlain]: treesize reduction 36, result has 29.4 percent of original size [2021-06-05 04:35:23,003 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 04:35:23,004 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 04:35:23,004 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:63, output treesize:9 [2021-06-05 04:35:23,025 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:35:23,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [31819173] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:35:23,025 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:35:23,025 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 04:35:23,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39525517] [2021-06-05 04:35:23,025 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:35:23,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:35:23,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:35:23,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:35:23,025 INFO L87 Difference]: Start difference. First operand 178 states and 397 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:23,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:35:23,167 INFO L93 Difference]: Finished difference Result 201 states and 441 transitions. [2021-06-05 04:35:23,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:35:23,167 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 04:35:23,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:35:23,168 INFO L225 Difference]: With dead ends: 201 [2021-06-05 04:35:23,168 INFO L226 Difference]: Without dead ends: 201 [2021-06-05 04:35:23,168 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 173.9ms TimeCoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:35:23,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2021-06-05 04:35:23,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 178. [2021-06-05 04:35:23,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 2.2429378531073447) internal successors, (397), 177 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:23,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 397 transitions. [2021-06-05 04:35:23,169 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 397 transitions. Word has length 19 [2021-06-05 04:35:23,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:35:23,169 INFO L482 AbstractCegarLoop]: Abstraction has 178 states and 397 transitions. [2021-06-05 04:35:23,169 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 04:35:23,169 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 397 transitions. [2021-06-05 04:35:23,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:35:23,170 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:35:23,170 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:35:23,370 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1567,301 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:35:23,370 INFO L430 AbstractCegarLoop]: === Iteration 307 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:35:23,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:35:23,370 INFO L82 PathProgramCache]: Analyzing trace with hash -428211314, now seen corresponding path program 301 times [2021-06-05 04:35:23,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:35:23,370 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041851140] [2021-06-05 04:35:23,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:35:23,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:35:23,484 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 04:35:23,484 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:35:23,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041851140] [2021-06-05 04:35:23,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041851140] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:35:23,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1848030232] [2021-06-05 04:35:23,484 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:35:23,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:35:23,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:35:23,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:35:23,675 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:35:23,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1848030232] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:35:23,675 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:35:23,675 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 04:35:23,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439183454] [2021-06-05 04:35:23,675 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:35:23,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:35:23,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:35:23,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:35:23,676 INFO L87 Difference]: Start difference. First operand 178 states and 397 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:24,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:35:24,021 INFO L93 Difference]: Finished difference Result 194 states and 421 transitions. [2021-06-05 04:35:24,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:35:24,022 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:35:24,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:35:24,022 INFO L225 Difference]: With dead ends: 194 [2021-06-05 04:35:24,022 INFO L226 Difference]: Without dead ends: 185 [2021-06-05 04:35:24,022 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 388.7ms TimeCoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:35:24,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2021-06-05 04:35:24,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 177. [2021-06-05 04:35:24,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 176 states have (on average 2.2386363636363638) internal successors, (394), 176 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:24,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 394 transitions. [2021-06-05 04:35:24,024 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 394 transitions. Word has length 19 [2021-06-05 04:35:24,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:35:24,024 INFO L482 AbstractCegarLoop]: Abstraction has 177 states and 394 transitions. [2021-06-05 04:35:24,024 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 04:35:24,024 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 394 transitions. [2021-06-05 04:35:24,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:35:24,024 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:35:24,024 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:35:24,224 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1569,302 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:35:24,224 INFO L430 AbstractCegarLoop]: === Iteration 308 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:35:24,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:35:24,225 INFO L82 PathProgramCache]: Analyzing trace with hash -877987262, now seen corresponding path program 302 times [2021-06-05 04:35:24,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:35:24,225 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262307711] [2021-06-05 04:35:24,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:35:24,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:35:24,311 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:35:24,311 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:35:24,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262307711] [2021-06-05 04:35:24,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262307711] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:35:24,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1921501062] [2021-06-05 04:35:24,312 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:35:24,336 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:35:24,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:35:24,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 04:35:24,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:35:24,516 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:24,516 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:24,517 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 17 treesize of output 13 [2021-06-05 04:35:24,517 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:24,520 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:24,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:35:24,521 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:24,542 INFO L628 ElimStorePlain]: treesize reduction 34, result has 30.6 percent of original size [2021-06-05 04:35:24,543 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 04:35:24,544 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 04:35:24,544 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:63, output treesize:9 [2021-06-05 04:35:24,564 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 04:35:24,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1921501062] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:35:24,564 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:35:24,564 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 04:35:24,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819301393] [2021-06-05 04:35:24,565 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:35:24,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:35:24,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:35:24,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:35:24,565 INFO L87 Difference]: Start difference. First operand 177 states and 394 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:24,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:35:24,701 INFO L93 Difference]: Finished difference Result 217 states and 472 transitions. [2021-06-05 04:35:24,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:35:24,702 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 04:35:24,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:35:24,702 INFO L225 Difference]: With dead ends: 217 [2021-06-05 04:35:24,702 INFO L226 Difference]: Without dead ends: 217 [2021-06-05 04:35:24,702 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 200.0ms TimeCoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:35:24,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-06-05 04:35:24,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 178. [2021-06-05 04:35:24,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 2.23728813559322) internal successors, (396), 177 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:24,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 396 transitions. [2021-06-05 04:35:24,704 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 396 transitions. Word has length 19 [2021-06-05 04:35:24,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:35:24,704 INFO L482 AbstractCegarLoop]: Abstraction has 178 states and 396 transitions. [2021-06-05 04:35:24,704 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 04:35:24,704 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 396 transitions. [2021-06-05 04:35:24,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:35:24,704 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:35:24,704 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:35:24,904 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1575,303 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:35:24,905 INFO L430 AbstractCegarLoop]: === Iteration 309 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:35:24,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:35:24,905 INFO L82 PathProgramCache]: Analyzing trace with hash -2122766318, now seen corresponding path program 303 times [2021-06-05 04:35:24,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:35:24,905 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375440400] [2021-06-05 04:35:24,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:35:24,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:35:25,011 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:35:25,011 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:35:25,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375440400] [2021-06-05 04:35:25,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375440400] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:35:25,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580636898] [2021-06-05 04:35:25,012 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:35:25,045 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:35:25,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:35:25,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:35:25,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:35:25,197 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 04:35:25,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [580636898] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:35:25,198 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:35:25,198 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 04:35:25,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135164440] [2021-06-05 04:35:25,198 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:35:25,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:35:25,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:35:25,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:35:25,198 INFO L87 Difference]: Start difference. First operand 178 states and 396 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:25,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:35:25,369 INFO L93 Difference]: Finished difference Result 214 states and 466 transitions. [2021-06-05 04:35:25,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:35:25,369 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:35:25,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:35:25,369 INFO L225 Difference]: With dead ends: 214 [2021-06-05 04:35:25,369 INFO L226 Difference]: Without dead ends: 214 [2021-06-05 04:35:25,369 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 184.4ms TimeCoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:35:25,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-06-05 04:35:25,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 179. [2021-06-05 04:35:25,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 178 states have (on average 2.235955056179775) internal successors, (398), 178 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:25,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 398 transitions. [2021-06-05 04:35:25,371 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 398 transitions. Word has length 19 [2021-06-05 04:35:25,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:35:25,371 INFO L482 AbstractCegarLoop]: Abstraction has 179 states and 398 transitions. [2021-06-05 04:35:25,371 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 04:35:25,371 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 398 transitions. [2021-06-05 04:35:25,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:35:25,371 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:35:25,371 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:35:25,572 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 304 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1577 [2021-06-05 04:35:25,572 INFO L430 AbstractCegarLoop]: === Iteration 310 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:35:25,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:35:25,572 INFO L82 PathProgramCache]: Analyzing trace with hash 1386146958, now seen corresponding path program 304 times [2021-06-05 04:35:25,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:35:25,572 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328210829] [2021-06-05 04:35:25,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:35:25,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:35:25,683 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:35:25,683 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:35:25,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328210829] [2021-06-05 04:35:25,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328210829] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:35:25,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138586253] [2021-06-05 04:35:25,683 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:35:25,707 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:35:25,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:35:25,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:35:25,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:35:25,859 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:25,859 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:25,859 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 16 treesize of output 12 [2021-06-05 04:35:25,860 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:25,862 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:25,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:35:25,863 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:25,902 INFO L628 ElimStorePlain]: treesize reduction 68, result has 36.4 percent of original size [2021-06-05 04:35:25,902 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 04:35:25,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:35:25,904 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:25,917 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:35:25,917 INFO L518 ElimStorePlain]: Eliminatee v_prenex_268 vanished before elimination [2021-06-05 04:35:25,918 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 04:35:25,918 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-06-05 04:35:25,947 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 04:35:25,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1138586253] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:35:25,948 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:35:25,948 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 04:35:25,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184414946] [2021-06-05 04:35:25,948 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:35:25,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:35:25,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:35:25,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:35:25,948 INFO L87 Difference]: Start difference. First operand 179 states and 398 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:26,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:35:26,445 INFO L93 Difference]: Finished difference Result 205 states and 439 transitions. [2021-06-05 04:35:26,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:35:26,446 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:35:26,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:35:26,446 INFO L225 Difference]: With dead ends: 205 [2021-06-05 04:35:26,446 INFO L226 Difference]: Without dead ends: 202 [2021-06-05 04:35:26,446 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 519.7ms TimeCoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:35:26,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-06-05 04:35:26,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 184. [2021-06-05 04:35:26,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 183 states have (on average 2.2349726775956285) internal successors, (409), 183 states have internal predecessors, (409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:26,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 409 transitions. [2021-06-05 04:35:26,448 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 409 transitions. Word has length 19 [2021-06-05 04:35:26,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:35:26,448 INFO L482 AbstractCegarLoop]: Abstraction has 184 states and 409 transitions. [2021-06-05 04:35:26,448 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 04:35:26,448 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 409 transitions. [2021-06-05 04:35:26,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:35:26,448 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:35:26,448 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:35:26,648 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1581,305 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:35:26,649 INFO L430 AbstractCegarLoop]: === Iteration 311 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:35:26,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:35:26,649 INFO L82 PathProgramCache]: Analyzing trace with hash 1162215490, now seen corresponding path program 305 times [2021-06-05 04:35:26,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:35:26,649 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33717867] [2021-06-05 04:35:26,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:35:26,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:35:26,726 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:35:26,726 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:35:26,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33717867] [2021-06-05 04:35:26,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33717867] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:35:26,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418177273] [2021-06-05 04:35:26,726 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:35:26,752 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:35:26,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:35:26,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:35:26,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:35:26,914 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 04:35:26,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [418177273] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:35:26,914 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:35:26,914 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 04:35:26,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043310154] [2021-06-05 04:35:26,914 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:35:26,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:35:26,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:35:26,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:35:26,915 INFO L87 Difference]: Start difference. First operand 184 states and 409 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:27,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:35:27,092 INFO L93 Difference]: Finished difference Result 215 states and 469 transitions. [2021-06-05 04:35:27,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:35:27,092 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:35:27,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:35:27,093 INFO L225 Difference]: With dead ends: 215 [2021-06-05 04:35:27,093 INFO L226 Difference]: Without dead ends: 215 [2021-06-05 04:35:27,093 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 163.4ms TimeCoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:35:27,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2021-06-05 04:35:27,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 184. [2021-06-05 04:35:27,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 183 states have (on average 2.2349726775956285) internal successors, (409), 183 states have internal predecessors, (409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:27,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 409 transitions. [2021-06-05 04:35:27,095 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 409 transitions. Word has length 19 [2021-06-05 04:35:27,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:35:27,095 INFO L482 AbstractCegarLoop]: Abstraction has 184 states and 409 transitions. [2021-06-05 04:35:27,095 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 04:35:27,095 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 409 transitions. [2021-06-05 04:35:27,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:35:27,095 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:35:27,095 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:35:27,295 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 306 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1589 [2021-06-05 04:35:27,295 INFO L430 AbstractCegarLoop]: === Iteration 312 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:35:27,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:35:27,296 INFO L82 PathProgramCache]: Analyzing trace with hash -1772635066, now seen corresponding path program 306 times [2021-06-05 04:35:27,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:35:27,296 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368530183] [2021-06-05 04:35:27,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:35:27,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:35:27,409 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:35:27,409 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:35:27,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368530183] [2021-06-05 04:35:27,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368530183] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:35:27,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40777132] [2021-06-05 04:35:27,409 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:35:27,436 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:35:27,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:35:27,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 04:35:27,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:35:27,671 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:27,672 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:27,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:35:27,672 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:27,675 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:27,675 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 18 treesize of output 14 [2021-06-05 04:35:27,676 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:27,724 INFO L628 ElimStorePlain]: treesize reduction 74, result has 41.7 percent of original size [2021-06-05 04:35:27,726 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:27,726 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 9 treesize of output 5 [2021-06-05 04:35:27,727 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:35:27,744 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:35:27,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:35:27,747 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:27,762 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:35:27,762 INFO L518 ElimStorePlain]: Eliminatee v_prenex_272 vanished before elimination [2021-06-05 04:35:27,763 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 04:35:27,763 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:141, output treesize:22 [2021-06-05 04:35:27,807 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 04:35:27,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [40777132] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:35:27,807 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:35:27,807 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 04:35:27,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084922175] [2021-06-05 04:35:27,807 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:35:27,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:35:27,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:35:27,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:35:27,808 INFO L87 Difference]: Start difference. First operand 184 states and 409 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:27,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:35:27,953 INFO L93 Difference]: Finished difference Result 190 states and 418 transitions. [2021-06-05 04:35:27,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:35:27,954 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 04:35:27,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:35:27,954 INFO L225 Difference]: With dead ends: 190 [2021-06-05 04:35:27,954 INFO L226 Difference]: Without dead ends: 190 [2021-06-05 04:35:27,954 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 308.9ms TimeCoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:35:27,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-06-05 04:35:27,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 176. [2021-06-05 04:35:27,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 2.24) internal successors, (392), 175 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:27,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 392 transitions. [2021-06-05 04:35:27,956 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 392 transitions. Word has length 19 [2021-06-05 04:35:27,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:35:27,956 INFO L482 AbstractCegarLoop]: Abstraction has 176 states and 392 transitions. [2021-06-05 04:35:27,956 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 04:35:27,956 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 392 transitions. [2021-06-05 04:35:27,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:35:27,956 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:35:27,956 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:35:28,156 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 307 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1599 [2021-06-05 04:35:28,157 INFO L430 AbstractCegarLoop]: === Iteration 313 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:35:28,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:35:28,157 INFO L82 PathProgramCache]: Analyzing trace with hash 1727037130, now seen corresponding path program 307 times [2021-06-05 04:35:28,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:35:28,157 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625462841] [2021-06-05 04:35:28,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:35:28,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:35:28,230 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:35:28,230 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:35:28,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625462841] [2021-06-05 04:35:28,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625462841] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:35:28,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204440861] [2021-06-05 04:35:28,230 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:35:28,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:35:28,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 04:35:28,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:35:28,370 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:28,370 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:28,371 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 17 treesize of output 13 [2021-06-05 04:35:28,371 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:28,373 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:28,373 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 17 treesize of output 13 [2021-06-05 04:35:28,374 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:28,390 INFO L628 ElimStorePlain]: treesize reduction 36, result has 29.4 percent of original size [2021-06-05 04:35:28,390 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 04:35:28,391 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:35:28,391 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:63, output treesize:9 [2021-06-05 04:35:28,407 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 04:35:28,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1204440861] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:35:28,407 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:35:28,407 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 04:35:28,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043878580] [2021-06-05 04:35:28,408 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:35:28,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:35:28,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:35:28,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:35:28,408 INFO L87 Difference]: Start difference. First operand 176 states and 392 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:28,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:35:28,632 INFO L93 Difference]: Finished difference Result 208 states and 454 transitions. [2021-06-05 04:35:28,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:35:28,632 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 04:35:28,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:35:28,632 INFO L225 Difference]: With dead ends: 208 [2021-06-05 04:35:28,632 INFO L226 Difference]: Without dead ends: 208 [2021-06-05 04:35:28,632 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 183.1ms TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:35:28,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-06-05 04:35:28,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 177. [2021-06-05 04:35:28,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 176 states have (on average 2.2386363636363638) internal successors, (394), 176 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:28,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 394 transitions. [2021-06-05 04:35:28,634 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 394 transitions. Word has length 19 [2021-06-05 04:35:28,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:35:28,634 INFO L482 AbstractCegarLoop]: Abstraction has 177 states and 394 transitions. [2021-06-05 04:35:28,634 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 04:35:28,634 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 394 transitions. [2021-06-05 04:35:28,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:35:28,635 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:35:28,635 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:35:28,835 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1605,308 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:35:28,835 INFO L430 AbstractCegarLoop]: === Iteration 314 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:35:28,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:35:28,835 INFO L82 PathProgramCache]: Analyzing trace with hash 482258074, now seen corresponding path program 308 times [2021-06-05 04:35:28,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:35:28,836 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772614292] [2021-06-05 04:35:28,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:35:28,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:35:28,909 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:35:28,909 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:35:28,909 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772614292] [2021-06-05 04:35:28,909 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772614292] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:35:28,909 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320436179] [2021-06-05 04:35:28,909 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:35:28,935 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:35:28,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:35:28,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 04:35:28,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:35:29,066 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:29,066 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:29,066 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 17 treesize of output 13 [2021-06-05 04:35:29,067 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:29,069 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:29,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:35:29,074 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:29,090 INFO L628 ElimStorePlain]: treesize reduction 36, result has 29.4 percent of original size [2021-06-05 04:35:29,090 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 04:35:29,090 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:35:29,091 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:63, output treesize:9 [2021-06-05 04:35:29,107 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 04:35:29,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [320436179] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:35:29,107 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:35:29,107 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 04:35:29,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050969204] [2021-06-05 04:35:29,107 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:35:29,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:35:29,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:35:29,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:35:29,107 INFO L87 Difference]: Start difference. First operand 177 states and 394 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:29,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:35:29,524 INFO L93 Difference]: Finished difference Result 228 states and 494 transitions. [2021-06-05 04:35:29,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 04:35:29,524 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 04:35:29,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:35:29,525 INFO L225 Difference]: With dead ends: 228 [2021-06-05 04:35:29,525 INFO L226 Difference]: Without dead ends: 228 [2021-06-05 04:35:29,525 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 346.4ms TimeCoverageRelationStatistics Valid=97, Invalid=553, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:35:29,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2021-06-05 04:35:29,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 178. [2021-06-05 04:35:29,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 2.23728813559322) internal successors, (396), 177 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:29,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 396 transitions. [2021-06-05 04:35:29,526 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 396 transitions. Word has length 19 [2021-06-05 04:35:29,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:35:29,526 INFO L482 AbstractCegarLoop]: Abstraction has 178 states and 396 transitions. [2021-06-05 04:35:29,527 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 04:35:29,527 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 396 transitions. [2021-06-05 04:35:29,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:35:29,527 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:35:29,527 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:35:29,727 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1607,309 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:35:29,727 INFO L430 AbstractCegarLoop]: === Iteration 315 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:35:29,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:35:29,727 INFO L82 PathProgramCache]: Analyzing trace with hash 122341556, now seen corresponding path program 309 times [2021-06-05 04:35:29,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:35:29,728 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736773371] [2021-06-05 04:35:29,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:35:29,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:35:29,819 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:35:29,819 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:35:29,819 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736773371] [2021-06-05 04:35:29,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736773371] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:35:29,819 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [953734490] [2021-06-05 04:35:29,819 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:35:29,857 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:35:29,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:35:29,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:35:29,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:35:30,025 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 04:35:30,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [953734490] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:35:30,026 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:35:30,026 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 04:35:30,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803632517] [2021-06-05 04:35:30,026 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:35:30,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:35:30,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:35:30,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:35:30,026 INFO L87 Difference]: Start difference. First operand 178 states and 396 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:30,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:35:30,472 INFO L93 Difference]: Finished difference Result 224 states and 487 transitions. [2021-06-05 04:35:30,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 04:35:30,473 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:35:30,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:35:30,473 INFO L225 Difference]: With dead ends: 224 [2021-06-05 04:35:30,473 INFO L226 Difference]: Without dead ends: 224 [2021-06-05 04:35:30,473 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 385.9ms TimeCoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:35:30,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-06-05 04:35:30,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 179. [2021-06-05 04:35:30,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 178 states have (on average 2.235955056179775) internal successors, (398), 178 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:30,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 398 transitions. [2021-06-05 04:35:30,475 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 398 transitions. Word has length 19 [2021-06-05 04:35:30,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:35:30,475 INFO L482 AbstractCegarLoop]: Abstraction has 179 states and 398 transitions. [2021-06-05 04:35:30,475 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 04:35:30,475 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 398 transitions. [2021-06-05 04:35:30,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:35:30,475 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:35:30,475 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:35:30,675 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1609,310 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:35:30,675 INFO L430 AbstractCegarLoop]: === Iteration 316 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:35:30,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:35:30,676 INFO L82 PathProgramCache]: Analyzing trace with hash 832389326, now seen corresponding path program 310 times [2021-06-05 04:35:30,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:35:30,676 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504670190] [2021-06-05 04:35:30,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:35:30,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:35:30,762 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:35:30,762 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:35:30,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504670190] [2021-06-05 04:35:30,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504670190] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:35:30,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456303583] [2021-06-05 04:35:30,762 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:35:30,787 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:35:30,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:35:30,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:35:30,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:35:30,919 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:30,920 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:30,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:35:30,921 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:30,923 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:30,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:35:30,924 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:30,961 INFO L628 ElimStorePlain]: treesize reduction 60, result has 38.8 percent of original size [2021-06-05 04:35:30,961 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 04:35:30,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index 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 04:35:30,963 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:30,976 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:35:30,976 INFO L518 ElimStorePlain]: Eliminatee v_prenex_277 vanished before elimination [2021-06-05 04:35:30,977 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:35:30,977 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-06-05 04:35:31,003 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:35:31,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [456303583] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:35:31,003 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:35:31,003 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 04:35:31,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627931188] [2021-06-05 04:35:31,004 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:35:31,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:35:31,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:35:31,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:35:31,004 INFO L87 Difference]: Start difference. First operand 179 states and 398 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:31,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:35:31,394 INFO L93 Difference]: Finished difference Result 197 states and 432 transitions. [2021-06-05 04:35:31,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:35:31,394 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:35:31,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:35:31,395 INFO L225 Difference]: With dead ends: 197 [2021-06-05 04:35:31,395 INFO L226 Difference]: Without dead ends: 197 [2021-06-05 04:35:31,395 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 396.7ms TimeCoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:35:31,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-06-05 04:35:31,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 176. [2021-06-05 04:35:31,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 2.24) internal successors, (392), 175 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:31,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 392 transitions. [2021-06-05 04:35:31,396 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 392 transitions. Word has length 19 [2021-06-05 04:35:31,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:35:31,396 INFO L482 AbstractCegarLoop]: Abstraction has 176 states and 392 transitions. [2021-06-05 04:35:31,396 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 04:35:31,396 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 392 transitions. [2021-06-05 04:35:31,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:35:31,397 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:35:31,397 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:35:31,597 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1619,311 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:35:31,597 INFO L430 AbstractCegarLoop]: === Iteration 317 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:35:31,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:35:31,597 INFO L82 PathProgramCache]: Analyzing trace with hash -403540206, now seen corresponding path program 311 times [2021-06-05 04:35:31,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:35:31,598 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958053675] [2021-06-05 04:35:31,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:35:31,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:35:31,675 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:35:31,675 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:35:31,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958053675] [2021-06-05 04:35:31,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958053675] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:35:31,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728521489] [2021-06-05 04:35:31,675 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 312 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 312 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:35:31,700 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:35:31,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:35:31,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:35:31,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:35:31,828 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 04:35:31,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1728521489] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:35:31,828 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:35:31,828 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 04:35:31,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047426700] [2021-06-05 04:35:31,828 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:35:31,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:35:31,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:35:31,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:35:31,829 INFO L87 Difference]: Start difference. First operand 176 states and 392 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:32,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:35:32,124 INFO L93 Difference]: Finished difference Result 213 states and 464 transitions. [2021-06-05 04:35:32,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:35:32,124 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 04:35:32,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:35:32,125 INFO L225 Difference]: With dead ends: 213 [2021-06-05 04:35:32,125 INFO L226 Difference]: Without dead ends: 213 [2021-06-05 04:35:32,125 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 259.2ms TimeCoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:35:32,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2021-06-05 04:35:32,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 178. [2021-06-05 04:35:32,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 2.23728813559322) internal successors, (396), 177 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:32,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 396 transitions. [2021-06-05 04:35:32,126 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 396 transitions. Word has length 19 [2021-06-05 04:35:32,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:35:32,127 INFO L482 AbstractCegarLoop]: Abstraction has 178 states and 396 transitions. [2021-06-05 04:35:32,127 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 04:35:32,127 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 396 transitions. [2021-06-05 04:35:32,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:35:32,127 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:35:32,127 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:35:32,336 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 312 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1626 [2021-06-05 04:35:32,337 INFO L430 AbstractCegarLoop]: === Iteration 318 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:35:32,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:35:32,337 INFO L82 PathProgramCache]: Analyzing trace with hash -763456724, now seen corresponding path program 312 times [2021-06-05 04:35:32,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:35:32,337 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275890313] [2021-06-05 04:35:32,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:35:32,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:35:32,417 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 04:35:32,417 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:35:32,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275890313] [2021-06-05 04:35:32,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275890313] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:35:32,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580957990] [2021-06-05 04:35:32,417 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 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 04:35:32,442 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:35:32,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:35:32,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 04:35:32,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:35:32,534 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:32,534 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:32,535 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 17 treesize of output 13 [2021-06-05 04:35:32,535 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:32,538 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:32,538 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 17 treesize of output 13 [2021-06-05 04:35:32,539 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:32,583 INFO L628 ElimStorePlain]: treesize reduction 80, result has 35.0 percent of original size [2021-06-05 04:35:32,584 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 04:35:32,585 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 9 treesize of output 7 [2021-06-05 04:35:32,586 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:32,602 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:35:32,602 INFO L518 ElimStorePlain]: Eliminatee v_prenex_279 vanished before elimination [2021-06-05 04:35:32,603 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 04:35:32,603 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:133, output treesize:22 [2021-06-05 04:35:32,644 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:35:32,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [580957990] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:35:32,644 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:35:32,644 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 04:35:32,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402560849] [2021-06-05 04:35:32,644 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:35:32,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:35:32,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:35:32,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:35:32,645 INFO L87 Difference]: Start difference. First operand 178 states and 396 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:33,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:35:33,125 INFO L93 Difference]: Finished difference Result 231 states and 500 transitions. [2021-06-05 04:35:33,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 04:35:33,125 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 04:35:33,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:35:33,126 INFO L225 Difference]: With dead ends: 231 [2021-06-05 04:35:33,126 INFO L226 Difference]: Without dead ends: 231 [2021-06-05 04:35:33,126 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 380.8ms TimeCoverageRelationStatistics Valid=113, Invalid=699, Unknown=0, NotChecked=0, Total=812 [2021-06-05 04:35:33,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2021-06-05 04:35:33,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 179. [2021-06-05 04:35:33,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 178 states have (on average 2.235955056179775) internal successors, (398), 178 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:33,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 398 transitions. [2021-06-05 04:35:33,127 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 398 transitions. Word has length 19 [2021-06-05 04:35:33,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:35:33,127 INFO L482 AbstractCegarLoop]: Abstraction has 179 states and 398 transitions. [2021-06-05 04:35:33,128 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 04:35:33,128 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 398 transitions. [2021-06-05 04:35:33,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:35:33,128 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:35:33,128 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:35:33,328 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 313 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1630 [2021-06-05 04:35:33,328 INFO L430 AbstractCegarLoop]: === Iteration 319 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:35:33,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:35:33,329 INFO L82 PathProgramCache]: Analyzing trace with hash -53408954, now seen corresponding path program 313 times [2021-06-05 04:35:33,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:35:33,329 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828758389] [2021-06-05 04:35:33,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:35:33,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:35:33,415 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:35:33,416 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:35:33,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828758389] [2021-06-05 04:35:33,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828758389] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:35:33,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865569511] [2021-06-05 04:35:33,416 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 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 04:35:33,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:35:33,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:35:33,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:35:33,547 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:33,547 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:33,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:35:33,548 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:33,551 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:33,551 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 16 treesize of output 12 [2021-06-05 04:35:33,552 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:33,592 INFO L628 ElimStorePlain]: treesize reduction 68, result has 36.4 percent of original size [2021-06-05 04:35:33,594 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 8 treesize of output 6 [2021-06-05 04:35:33,594 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:33,607 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:35:33,607 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 04:35:33,607 INFO L518 ElimStorePlain]: Eliminatee v_prenex_282 vanished before elimination [2021-06-05 04:35:33,608 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 04:35:33,608 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-06-05 04:35:33,634 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:35:33,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1865569511] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:35:33,635 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:35:33,635 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 04:35:33,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044583009] [2021-06-05 04:35:33,635 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:35:33,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:35:33,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:35:33,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:35:33,635 INFO L87 Difference]: Start difference. First operand 179 states and 398 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:34,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:35:34,063 INFO L93 Difference]: Finished difference Result 204 states and 446 transitions. [2021-06-05 04:35:34,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 04:35:34,063 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:35:34,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:35:34,064 INFO L225 Difference]: With dead ends: 204 [2021-06-05 04:35:34,064 INFO L226 Difference]: Without dead ends: 204 [2021-06-05 04:35:34,064 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 362.0ms TimeCoverageRelationStatistics Valid=90, Invalid=560, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:35:34,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-06-05 04:35:34,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 177. [2021-06-05 04:35:34,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 176 states have (on average 2.2386363636363638) internal successors, (394), 176 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:34,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 394 transitions. [2021-06-05 04:35:34,065 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 394 transitions. Word has length 19 [2021-06-05 04:35:34,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:35:34,065 INFO L482 AbstractCegarLoop]: Abstraction has 177 states and 394 transitions. [2021-06-05 04:35:34,065 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 04:35:34,065 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 394 transitions. [2021-06-05 04:35:34,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:35:34,066 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:35:34,066 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:35:34,266 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 314 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1634 [2021-06-05 04:35:34,266 INFO L430 AbstractCegarLoop]: === Iteration 320 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:35:34,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:35:34,267 INFO L82 PathProgramCache]: Analyzing trace with hash 998588950, now seen corresponding path program 314 times [2021-06-05 04:35:34,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:35:34,267 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885021635] [2021-06-05 04:35:34,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:35:34,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:35:34,365 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 04:35:34,365 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:35:34,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885021635] [2021-06-05 04:35:34,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885021635] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:35:34,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669395624] [2021-06-05 04:35:34,365 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 315 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 315 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:35:34,390 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:35:34,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:35:34,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 04:35:34,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:35:34,468 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:34,468 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:34,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 04:35:34,469 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:34,471 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:34,472 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:34,472 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 18 treesize of output 14 [2021-06-05 04:35:34,473 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:34,475 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:34,475 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:34,476 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 17 treesize of output 13 [2021-06-05 04:35:34,476 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:34,478 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:34,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:35:34,479 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:34,520 INFO L628 ElimStorePlain]: treesize reduction 69, result has 38.9 percent of original size [2021-06-05 04:35:34,523 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:34,523 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 9 treesize of output 5 [2021-06-05 04:35:34,524 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:35:34,557 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:35:34,558 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 04:35:34,558 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:141, output treesize:22 [2021-06-05 04:35:34,594 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 04:35:34,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [669395624] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:35:34,594 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:35:34,594 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 04:35:34,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573636197] [2021-06-05 04:35:34,594 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:35:34,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:35:34,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:35:34,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:35:34,595 INFO L87 Difference]: Start difference. First operand 177 states and 394 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:34,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:35:34,886 INFO L93 Difference]: Finished difference Result 239 states and 508 transitions. [2021-06-05 04:35:34,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 04:35:34,886 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:35:34,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:35:34,886 INFO L225 Difference]: With dead ends: 239 [2021-06-05 04:35:34,886 INFO L226 Difference]: Without dead ends: 236 [2021-06-05 04:35:34,886 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 284.7ms TimeCoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:35:34,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-06-05 04:35:34,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 184. [2021-06-05 04:35:34,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 183 states have (on average 2.2459016393442623) internal successors, (411), 183 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:34,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 411 transitions. [2021-06-05 04:35:34,888 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 411 transitions. Word has length 19 [2021-06-05 04:35:34,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:35:34,888 INFO L482 AbstractCegarLoop]: Abstraction has 184 states and 411 transitions. [2021-06-05 04:35:34,888 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 04:35:34,888 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 411 transitions. [2021-06-05 04:35:34,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:35:34,888 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:35:34,888 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:35:35,089 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 315 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1641 [2021-06-05 04:35:35,089 INFO L430 AbstractCegarLoop]: === Iteration 321 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:35:35,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:35:35,089 INFO L82 PathProgramCache]: Analyzing trace with hash 1424726452, now seen corresponding path program 315 times [2021-06-05 04:35:35,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:35:35,090 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576437212] [2021-06-05 04:35:35,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:35:35,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:35:35,177 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 04:35:35,177 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:35:35,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576437212] [2021-06-05 04:35:35,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576437212] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:35:35,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015613445] [2021-06-05 04:35:35,177 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 316 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 316 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:35:35,202 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:35:35,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:35:35,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:35:35,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:35:35,332 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:35:35,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1015613445] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:35:35,333 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:35:35,333 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 04:35:35,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17613326] [2021-06-05 04:35:35,333 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:35:35,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:35:35,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:35:35,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:35:35,333 INFO L87 Difference]: Start difference. First operand 184 states and 411 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:35,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:35:35,671 INFO L93 Difference]: Finished difference Result 223 states and 480 transitions. [2021-06-05 04:35:35,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:35:35,671 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:35:35,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:35:35,671 INFO L225 Difference]: With dead ends: 223 [2021-06-05 04:35:35,671 INFO L226 Difference]: Without dead ends: 223 [2021-06-05 04:35:35,671 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 306.8ms TimeCoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:35:35,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2021-06-05 04:35:35,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 184. [2021-06-05 04:35:35,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 183 states have (on average 2.2459016393442623) internal successors, (411), 183 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:35,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 411 transitions. [2021-06-05 04:35:35,673 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 411 transitions. Word has length 19 [2021-06-05 04:35:35,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:35:35,673 INFO L482 AbstractCegarLoop]: Abstraction has 184 states and 411 transitions. [2021-06-05 04:35:35,673 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 04:35:35,673 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 411 transitions. [2021-06-05 04:35:35,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:35:35,673 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:35:35,673 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:35:35,874 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1645,316 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:35:35,874 INFO L430 AbstractCegarLoop]: === Iteration 322 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:35:35,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:35:35,874 INFO L82 PathProgramCache]: Analyzing trace with hash 2134774222, now seen corresponding path program 316 times [2021-06-05 04:35:35,874 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:35:35,874 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391763392] [2021-06-05 04:35:35,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:35:35,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:35:35,951 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:35:35,951 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:35:35,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391763392] [2021-06-05 04:35:35,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391763392] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:35:35,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427253817] [2021-06-05 04:35:35,951 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 317 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 317 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:35:35,979 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:35:35,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:35:35,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:35:35,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:35:36,079 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:36,079 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:36,079 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 04:35:36,080 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:36,082 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:36,082 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:36,082 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 17 treesize of output 13 [2021-06-05 04:35:36,083 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:36,085 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:36,086 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:36,086 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 16 treesize of output 12 [2021-06-05 04:35:36,086 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:36,088 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:36,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:35:36,089 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:36,120 INFO L628 ElimStorePlain]: treesize reduction 53, result has 36.9 percent of original size [2021-06-05 04:35:36,120 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 04:35:36,121 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:35:36,121 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:121, output treesize:15 [2021-06-05 04:35:36,145 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:35:36,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1427253817] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:35:36,146 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:35:36,146 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 04:35:36,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963309158] [2021-06-05 04:35:36,146 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:35:36,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:35:36,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:35:36,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:35:36,146 INFO L87 Difference]: Start difference. First operand 184 states and 411 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:36,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:35:36,476 INFO L93 Difference]: Finished difference Result 249 states and 529 transitions. [2021-06-05 04:35:36,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 04:35:36,476 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:35:36,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:35:36,476 INFO L225 Difference]: With dead ends: 249 [2021-06-05 04:35:36,476 INFO L226 Difference]: Without dead ends: 249 [2021-06-05 04:35:36,476 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 292.5ms TimeCoverageRelationStatistics Valid=88, Invalid=614, Unknown=0, NotChecked=0, Total=702 [2021-06-05 04:35:36,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2021-06-05 04:35:36,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 183. [2021-06-05 04:35:36,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 2.2472527472527473) internal successors, (409), 182 states have internal predecessors, (409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:36,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 409 transitions. [2021-06-05 04:35:36,478 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 409 transitions. Word has length 19 [2021-06-05 04:35:36,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:35:36,478 INFO L482 AbstractCegarLoop]: Abstraction has 183 states and 409 transitions. [2021-06-05 04:35:36,478 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 04:35:36,478 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 409 transitions. [2021-06-05 04:35:36,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:35:36,479 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:35:36,479 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:35:36,679 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 317 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1655 [2021-06-05 04:35:36,679 INFO L430 AbstractCegarLoop]: === Iteration 323 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:35:36,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:35:36,679 INFO L82 PathProgramCache]: Analyzing trace with hash -98277772, now seen corresponding path program 317 times [2021-06-05 04:35:36,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:35:36,679 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687655722] [2021-06-05 04:35:36,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:35:36,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:35:36,768 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:35:36,768 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:35:36,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687655722] [2021-06-05 04:35:36,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687655722] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:35:36,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721223841] [2021-06-05 04:35:36,768 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 318 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 318 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:35:36,794 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 04:35:36,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:35:36,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:35:36,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:35:36,889 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:35:36,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1721223841] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:35:36,890 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:35:36,890 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 04:35:36,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612632275] [2021-06-05 04:35:36,890 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:35:36,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:35:36,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:35:36,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:35:36,890 INFO L87 Difference]: Start difference. First operand 183 states and 409 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:37,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:35:37,179 INFO L93 Difference]: Finished difference Result 195 states and 427 transitions. [2021-06-05 04:35:37,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:35:37,179 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:35:37,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:35:37,180 INFO L225 Difference]: With dead ends: 195 [2021-06-05 04:35:37,180 INFO L226 Difference]: Without dead ends: 191 [2021-06-05 04:35:37,180 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 293.1ms TimeCoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:35:37,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-06-05 04:35:37,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 183. [2021-06-05 04:35:37,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 2.241758241758242) internal successors, (408), 182 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:37,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 408 transitions. [2021-06-05 04:35:37,181 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 408 transitions. Word has length 19 [2021-06-05 04:35:37,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:35:37,181 INFO L482 AbstractCegarLoop]: Abstraction has 183 states and 408 transitions. [2021-06-05 04:35:37,181 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 04:35:37,181 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 408 transitions. [2021-06-05 04:35:37,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:35:37,182 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:35:37,182 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:35:37,382 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 318 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1665 [2021-06-05 04:35:37,382 INFO L430 AbstractCegarLoop]: === Iteration 324 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:35:37,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:35:37,382 INFO L82 PathProgramCache]: Analyzing trace with hash -11396538, now seen corresponding path program 318 times [2021-06-05 04:35:37,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:35:37,383 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494600858] [2021-06-05 04:35:37,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:35:37,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:35:37,461 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:35:37,461 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:35:37,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494600858] [2021-06-05 04:35:37,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494600858] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:35:37,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93700638] [2021-06-05 04:35:37,461 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 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 04:35:37,487 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 04:35:37,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:35:37,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:35:37,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:35:37,579 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:37,580 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:37,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:35:37,581 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:37,582 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:37,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:35:37,583 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:37,597 INFO L628 ElimStorePlain]: treesize reduction 29, result has 32.6 percent of original size [2021-06-05 04:35:37,598 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 04:35:37,598 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 04:35:37,598 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:57, output treesize:6 [2021-06-05 04:35:37,604 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 04:35:37,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [93700638] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:35:37,604 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:35:37,604 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 04:35:37,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390671365] [2021-06-05 04:35:37,604 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:35:37,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:35:37,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:35:37,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:35:37,605 INFO L87 Difference]: Start difference. First operand 183 states and 408 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:37,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:35:37,875 INFO L93 Difference]: Finished difference Result 219 states and 476 transitions. [2021-06-05 04:35:37,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 04:35:37,876 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:35:37,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:35:37,876 INFO L225 Difference]: With dead ends: 219 [2021-06-05 04:35:37,876 INFO L226 Difference]: Without dead ends: 219 [2021-06-05 04:35:37,876 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 245.4ms TimeCoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:35:37,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2021-06-05 04:35:37,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 178. [2021-06-05 04:35:37,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 2.23728813559322) internal successors, (396), 177 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:37,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 396 transitions. [2021-06-05 04:35:37,878 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 396 transitions. Word has length 19 [2021-06-05 04:35:37,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:35:37,878 INFO L482 AbstractCegarLoop]: Abstraction has 178 states and 396 transitions. [2021-06-05 04:35:37,878 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 04:35:37,878 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 396 transitions. [2021-06-05 04:35:37,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:35:37,878 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:35:37,878 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:35:38,078 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 319 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1669 [2021-06-05 04:35:38,078 INFO L430 AbstractCegarLoop]: === Iteration 325 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:35:38,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:35:38,079 INFO L82 PathProgramCache]: Analyzing trace with hash -1213288618, now seen corresponding path program 319 times [2021-06-05 04:35:38,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:35:38,079 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707792719] [2021-06-05 04:35:38,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:35:38,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:35:38,157 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:35:38,157 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:35:38,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707792719] [2021-06-05 04:35:38,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707792719] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:35:38,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350301600] [2021-06-05 04:35:38,157 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 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 04:35:38,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:35:38,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 04:35:38,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:35:38,333 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:38,333 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:38,333 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 17 treesize of output 13 [2021-06-05 04:35:38,334 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:38,336 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:38,336 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 17 treesize of output 13 [2021-06-05 04:35:38,337 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:38,356 INFO L628 ElimStorePlain]: treesize reduction 38, result has 28.3 percent of original size [2021-06-05 04:35:38,356 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 04:35:38,357 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 04:35:38,357 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:63, output treesize:9 [2021-06-05 04:35:38,373 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 04:35:38,373 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1350301600] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:35:38,373 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:35:38,373 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:35:38,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677444275] [2021-06-05 04:35:38,373 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:35:38,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:35:38,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:35:38,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:35:38,374 INFO L87 Difference]: Start difference. First operand 178 states and 396 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:38,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:35:38,507 INFO L93 Difference]: Finished difference Result 199 states and 437 transitions. [2021-06-05 04:35:38,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:35:38,508 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 04:35:38,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:35:38,508 INFO L225 Difference]: With dead ends: 199 [2021-06-05 04:35:38,508 INFO L226 Difference]: Without dead ends: 199 [2021-06-05 04:35:38,508 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 183.3ms TimeCoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:35:38,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-06-05 04:35:38,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 178. [2021-06-05 04:35:38,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 2.23728813559322) internal successors, (396), 177 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:38,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 396 transitions. [2021-06-05 04:35:38,510 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 396 transitions. Word has length 19 [2021-06-05 04:35:38,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:35:38,510 INFO L482 AbstractCegarLoop]: Abstraction has 178 states and 396 transitions. [2021-06-05 04:35:38,510 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 04:35:38,510 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 396 transitions. [2021-06-05 04:35:38,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:35:38,510 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:35:38,510 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:35:38,710 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 320 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1673 [2021-06-05 04:35:38,711 INFO L430 AbstractCegarLoop]: === Iteration 326 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:35:38,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:35:38,711 INFO L82 PathProgramCache]: Analyzing trace with hash -1146733690, now seen corresponding path program 320 times [2021-06-05 04:35:38,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:35:38,711 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363318216] [2021-06-05 04:35:38,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:35:38,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:35:38,791 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:35:38,791 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:35:38,791 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363318216] [2021-06-05 04:35:38,791 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363318216] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:35:38,791 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130788812] [2021-06-05 04:35:38,791 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 321 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 321 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:35:38,822 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:35:38,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:35:38,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 04:35:38,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:35:38,973 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:38,973 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:38,973 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 17 treesize of output 13 [2021-06-05 04:35:38,974 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:38,976 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:38,976 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 17 treesize of output 13 [2021-06-05 04:35:38,977 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:38,993 INFO L628 ElimStorePlain]: treesize reduction 36, result has 29.4 percent of original size [2021-06-05 04:35:38,993 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 04:35:38,994 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:35:38,994 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:63, output treesize:9 [2021-06-05 04:35:39,011 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 04:35:39,011 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [130788812] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:35:39,011 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:35:39,011 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:35:39,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603505447] [2021-06-05 04:35:39,011 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:35:39,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:35:39,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:35:39,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:35:39,011 INFO L87 Difference]: Start difference. First operand 178 states and 396 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:39,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:35:39,408 INFO L93 Difference]: Finished difference Result 219 states and 477 transitions. [2021-06-05 04:35:39,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:35:39,408 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 04:35:39,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:35:39,408 INFO L225 Difference]: With dead ends: 219 [2021-06-05 04:35:39,409 INFO L226 Difference]: Without dead ends: 219 [2021-06-05 04:35:39,409 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 396.4ms TimeCoverageRelationStatistics Valid=96, Invalid=606, Unknown=0, NotChecked=0, Total=702 [2021-06-05 04:35:39,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2021-06-05 04:35:39,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 178. [2021-06-05 04:35:39,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 2.23728813559322) internal successors, (396), 177 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:39,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 396 transitions. [2021-06-05 04:35:39,410 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 396 transitions. Word has length 19 [2021-06-05 04:35:39,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:35:39,410 INFO L482 AbstractCegarLoop]: Abstraction has 178 states and 396 transitions. [2021-06-05 04:35:39,410 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 04:35:39,410 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 396 transitions. [2021-06-05 04:35:39,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:35:39,411 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:35:39,411 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:35:39,611 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1675,321 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:35:39,611 INFO L430 AbstractCegarLoop]: === Iteration 327 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:35:39,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:35:39,611 INFO L82 PathProgramCache]: Analyzing trace with hash 1903454550, now seen corresponding path program 321 times [2021-06-05 04:35:39,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:35:39,612 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300665811] [2021-06-05 04:35:39,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:35:39,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:35:39,693 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:35:39,693 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:35:39,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300665811] [2021-06-05 04:35:39,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300665811] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:35:39,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40859689] [2021-06-05 04:35:39,693 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 322 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 322 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:35:39,719 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:35:39,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:35:39,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:35:39,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:35:39,883 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 04:35:39,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [40859689] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:35:39,884 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:35:39,884 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 04:35:39,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003685193] [2021-06-05 04:35:39,884 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:35:39,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:35:39,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:35:39,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:35:39,884 INFO L87 Difference]: Start difference. First operand 178 states and 396 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:40,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:35:40,339 INFO L93 Difference]: Finished difference Result 234 states and 507 transitions. [2021-06-05 04:35:40,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:35:40,339 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 04:35:40,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:35:40,340 INFO L225 Difference]: With dead ends: 234 [2021-06-05 04:35:40,340 INFO L226 Difference]: Without dead ends: 234 [2021-06-05 04:35:40,340 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 393.0ms TimeCoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:35:40,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-06-05 04:35:40,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 178. [2021-06-05 04:35:40,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 2.23728813559322) internal successors, (396), 177 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:40,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 396 transitions. [2021-06-05 04:35:40,341 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 396 transitions. Word has length 19 [2021-06-05 04:35:40,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:35:40,341 INFO L482 AbstractCegarLoop]: Abstraction has 178 states and 396 transitions. [2021-06-05 04:35:40,341 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 04:35:40,341 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 396 transitions. [2021-06-05 04:35:40,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:35:40,342 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:35:40,342 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:35:40,542 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 322 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1677 [2021-06-05 04:35:40,542 INFO L430 AbstractCegarLoop]: === Iteration 328 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:35:40,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:35:40,542 INFO L82 PathProgramCache]: Analyzing trace with hash 1117400530, now seen corresponding path program 322 times [2021-06-05 04:35:40,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:35:40,543 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108126225] [2021-06-05 04:35:40,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:35:40,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:35:40,644 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:35:40,644 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:35:40,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108126225] [2021-06-05 04:35:40,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108126225] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:35:40,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622000335] [2021-06-05 04:35:40,644 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 323 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 323 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:35:40,668 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:35:40,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:35:40,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:35:40,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:35:40,832 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:40,833 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:40,833 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 17 treesize of output 13 [2021-06-05 04:35:40,834 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:40,836 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:40,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:35:40,837 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:40,873 INFO L628 ElimStorePlain]: treesize reduction 60, result has 38.8 percent of original size [2021-06-05 04:35:40,873 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 04:35:40,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index 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 04:35:40,876 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:40,888 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:35:40,888 INFO L518 ElimStorePlain]: Eliminatee v_prenex_288 vanished before elimination [2021-06-05 04:35:40,889 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 04:35:40,889 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-06-05 04:35:40,919 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:35:40,919 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1622000335] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:35:40,919 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:35:40,919 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 04:35:40,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787217273] [2021-06-05 04:35:40,919 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:35:40,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:35:40,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:35:40,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=237, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:35:40,920 INFO L87 Difference]: Start difference. First operand 178 states and 396 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:41,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:35:41,480 INFO L93 Difference]: Finished difference Result 208 states and 446 transitions. [2021-06-05 04:35:41,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:35:41,481 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 04:35:41,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:35:41,481 INFO L225 Difference]: With dead ends: 208 [2021-06-05 04:35:41,481 INFO L226 Difference]: Without dead ends: 205 [2021-06-05 04:35:41,481 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 555.8ms TimeCoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:35:41,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-06-05 04:35:41,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 183. [2021-06-05 04:35:41,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 2.2362637362637363) internal successors, (407), 182 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:41,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 407 transitions. [2021-06-05 04:35:41,483 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 407 transitions. Word has length 19 [2021-06-05 04:35:41,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:35:41,483 INFO L482 AbstractCegarLoop]: Abstraction has 183 states and 407 transitions. [2021-06-05 04:35:41,483 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 04:35:41,483 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 407 transitions. [2021-06-05 04:35:41,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:35:41,483 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:35:41,483 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:35:41,683 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1681,323 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:35:41,683 INFO L430 AbstractCegarLoop]: === Iteration 329 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:35:41,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:35:41,684 INFO L82 PathProgramCache]: Analyzing trace with hash 893469062, now seen corresponding path program 323 times [2021-06-05 04:35:41,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:35:41,684 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176049735] [2021-06-05 04:35:41,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:35:41,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:35:41,770 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:35:41,770 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:35:41,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176049735] [2021-06-05 04:35:41,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176049735] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:35:41,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791921155] [2021-06-05 04:35:41,770 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 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 04:35:41,795 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:35:41,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:35:41,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:35:41,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:35:41,976 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 04:35:41,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [791921155] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:35:41,976 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:35:41,976 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 04:35:41,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253395181] [2021-06-05 04:35:41,976 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:35:41,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:35:41,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:35:41,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:35:41,977 INFO L87 Difference]: Start difference. First operand 183 states and 407 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:42,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:35:42,382 INFO L93 Difference]: Finished difference Result 233 states and 506 transitions. [2021-06-05 04:35:42,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:35:42,382 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 04:35:42,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:35:42,382 INFO L225 Difference]: With dead ends: 233 [2021-06-05 04:35:42,382 INFO L226 Difference]: Without dead ends: 233 [2021-06-05 04:35:42,382 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 413.8ms TimeCoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:35:42,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2021-06-05 04:35:42,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 183. [2021-06-05 04:35:42,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 2.2362637362637363) internal successors, (407), 182 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:42,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 407 transitions. [2021-06-05 04:35:42,384 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 407 transitions. Word has length 19 [2021-06-05 04:35:42,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:35:42,384 INFO L482 AbstractCegarLoop]: Abstraction has 183 states and 407 transitions. [2021-06-05 04:35:42,384 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 04:35:42,384 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 407 transitions. [2021-06-05 04:35:42,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:35:42,385 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:35:42,385 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:35:42,585 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 324 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1689 [2021-06-05 04:35:42,585 INFO L430 AbstractCegarLoop]: === Iteration 330 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:35:42,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:35:42,585 INFO L82 PathProgramCache]: Analyzing trace with hash -2041381494, now seen corresponding path program 324 times [2021-06-05 04:35:42,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:35:42,585 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315745512] [2021-06-05 04:35:42,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:35:42,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:35:42,691 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:35:42,691 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:35:42,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315745512] [2021-06-05 04:35:42,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315745512] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:35:42,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215893866] [2021-06-05 04:35:42,692 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 325 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 325 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:35:42,717 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:35:42,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:35:42,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:35:42,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:35:42,878 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:42,878 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:42,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:35:42,879 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:42,881 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:42,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:35:42,882 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:42,919 INFO L628 ElimStorePlain]: treesize reduction 60, result has 38.8 percent of original size [2021-06-05 04:35:42,921 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 04:35:42,922 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:42,934 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:35:42,934 INFO L518 ElimStorePlain]: Eliminatee v_prenex_292 vanished before elimination [2021-06-05 04:35:42,934 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 04:35:42,935 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:35:42,935 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-06-05 04:35:42,963 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:35:42,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1215893866] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:35:42,963 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:35:42,963 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 04:35:42,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752661243] [2021-06-05 04:35:42,964 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:35:42,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:35:42,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:35:42,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:35:42,964 INFO L87 Difference]: Start difference. First operand 183 states and 407 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:43,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:35:43,368 INFO L93 Difference]: Finished difference Result 193 states and 425 transitions. [2021-06-05 04:35:43,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:35:43,369 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 04:35:43,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:35:43,369 INFO L225 Difference]: With dead ends: 193 [2021-06-05 04:35:43,369 INFO L226 Difference]: Without dead ends: 193 [2021-06-05 04:35:43,369 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 426.7ms TimeCoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:35:43,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-06-05 04:35:43,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 174. [2021-06-05 04:35:43,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 173 states have (on average 2.2427745664739884) internal successors, (388), 173 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:43,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 388 transitions. [2021-06-05 04:35:43,371 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 388 transitions. Word has length 19 [2021-06-05 04:35:43,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:35:43,371 INFO L482 AbstractCegarLoop]: Abstraction has 174 states and 388 transitions. [2021-06-05 04:35:43,371 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 04:35:43,371 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 388 transitions. [2021-06-05 04:35:43,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:35:43,371 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:35:43,371 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:35:43,571 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1699,325 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:35:43,572 INFO L430 AbstractCegarLoop]: === Iteration 331 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:35:43,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:35:43,572 INFO L82 PathProgramCache]: Analyzing trace with hash 609668230, now seen corresponding path program 325 times [2021-06-05 04:35:43,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:35:43,572 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283245490] [2021-06-05 04:35:43,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:35:43,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:35:43,645 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:35:43,646 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:35:43,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283245490] [2021-06-05 04:35:43,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283245490] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:35:43,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852337876] [2021-06-05 04:35:43,646 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 326 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 326 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:35:43,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:35:43,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 04:35:43,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:35:43,801 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:43,802 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:43,802 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 17 treesize of output 13 [2021-06-05 04:35:43,803 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:43,804 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:43,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:35:43,805 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:43,822 INFO L628 ElimStorePlain]: treesize reduction 34, result has 30.6 percent of original size [2021-06-05 04:35:43,822 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 04:35:43,823 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 04:35:43,823 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:63, output treesize:9 [2021-06-05 04:35:43,839 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 04:35:43,839 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1852337876] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:35:43,839 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:35:43,839 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:35:43,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552802109] [2021-06-05 04:35:43,839 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:35:43,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:35:43,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:35:43,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:35:43,840 INFO L87 Difference]: Start difference. First operand 174 states and 388 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:44,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:35:44,030 INFO L93 Difference]: Finished difference Result 219 states and 477 transitions. [2021-06-05 04:35:44,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:35:44,030 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 04:35:44,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:35:44,030 INFO L225 Difference]: With dead ends: 219 [2021-06-05 04:35:44,030 INFO L226 Difference]: Without dead ends: 219 [2021-06-05 04:35:44,030 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 176.8ms TimeCoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:35:44,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2021-06-05 04:35:44,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 174. [2021-06-05 04:35:44,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 173 states have (on average 2.2427745664739884) internal successors, (388), 173 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:44,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 388 transitions. [2021-06-05 04:35:44,032 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 388 transitions. Word has length 19 [2021-06-05 04:35:44,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:35:44,032 INFO L482 AbstractCegarLoop]: Abstraction has 174 states and 388 transitions. [2021-06-05 04:35:44,032 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 04:35:44,032 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 388 transitions. [2021-06-05 04:35:44,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:35:44,032 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:35:44,032 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:35:44,233 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 326 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1706 [2021-06-05 04:35:44,233 INFO L430 AbstractCegarLoop]: === Iteration 332 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:35:44,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:35:44,233 INFO L82 PathProgramCache]: Analyzing trace with hash 2011797386, now seen corresponding path program 326 times [2021-06-05 04:35:44,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:35:44,233 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182300644] [2021-06-05 04:35:44,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:35:44,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:35:44,329 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:35:44,329 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:35:44,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182300644] [2021-06-05 04:35:44,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182300644] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:35:44,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354516901] [2021-06-05 04:35:44,329 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 327 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 327 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:35:44,353 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:35:44,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:35:44,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 04:35:44,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:35:44,514 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:35:44,514 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1354516901] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:35:44,514 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:35:44,514 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 04:35:44,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277359206] [2021-06-05 04:35:44,514 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:35:44,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:35:44,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:35:44,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:35:44,515 INFO L87 Difference]: Start difference. First operand 174 states and 388 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:44,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:35:44,807 INFO L93 Difference]: Finished difference Result 187 states and 408 transitions. [2021-06-05 04:35:44,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:35:44,807 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 04:35:44,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:35:44,807 INFO L225 Difference]: With dead ends: 187 [2021-06-05 04:35:44,807 INFO L226 Difference]: Without dead ends: 181 [2021-06-05 04:35:44,807 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 290.5ms TimeCoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:35:44,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-06-05 04:35:44,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 174. [2021-06-05 04:35:44,809 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 04:35:44,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 387 transitions. [2021-06-05 04:35:44,809 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 387 transitions. Word has length 19 [2021-06-05 04:35:44,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:35:44,809 INFO L482 AbstractCegarLoop]: Abstraction has 174 states and 387 transitions. [2021-06-05 04:35:44,809 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 04:35:44,809 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 387 transitions. [2021-06-05 04:35:44,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:35:44,809 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:35:44,809 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:35:45,009 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1708,327 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:35:45,010 INFO L430 AbstractCegarLoop]: === Iteration 333 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:35:45,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:35:45,010 INFO L82 PathProgramCache]: Analyzing trace with hash -635110826, now seen corresponding path program 327 times [2021-06-05 04:35:45,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:35:45,010 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181824300] [2021-06-05 04:35:45,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:35:45,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:35:45,084 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:35:45,084 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:35:45,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181824300] [2021-06-05 04:35:45,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181824300] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:35:45,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45689386] [2021-06-05 04:35:45,084 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 328 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 328 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:35:45,110 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:35:45,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:35:45,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:35:45,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:35:45,256 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 04:35:45,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [45689386] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:35:45,256 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:35:45,256 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 04:35:45,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773806921] [2021-06-05 04:35:45,256 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:35:45,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:35:45,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:35:45,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:35:45,257 INFO L87 Difference]: Start difference. First operand 174 states and 387 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:45,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:35:45,631 INFO L93 Difference]: Finished difference Result 230 states and 498 transitions. [2021-06-05 04:35:45,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:35:45,632 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 04:35:45,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:35:45,632 INFO L225 Difference]: With dead ends: 230 [2021-06-05 04:35:45,632 INFO L226 Difference]: Without dead ends: 230 [2021-06-05 04:35:45,632 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 350.3ms TimeCoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:35:45,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2021-06-05 04:35:45,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 174. [2021-06-05 04:35:45,634 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 04:35:45,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 387 transitions. [2021-06-05 04:35:45,634 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 387 transitions. Word has length 19 [2021-06-05 04:35:45,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:35:45,634 INFO L482 AbstractCegarLoop]: Abstraction has 174 states and 387 transitions. [2021-06-05 04:35:45,634 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 04:35:45,634 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 387 transitions. [2021-06-05 04:35:45,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:35:45,634 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:35:45,634 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:35:45,835 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1713,328 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:35:45,835 INFO L430 AbstractCegarLoop]: === Iteration 334 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:35:45,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:35:45,835 INFO L82 PathProgramCache]: Analyzing trace with hash -1421164846, now seen corresponding path program 328 times [2021-06-05 04:35:45,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:35:45,835 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705788778] [2021-06-05 04:35:45,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:35:45,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:35:45,922 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:35:45,923 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:35:45,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705788778] [2021-06-05 04:35:45,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705788778] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:35:45,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158522985] [2021-06-05 04:35:45,923 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 329 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 329 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:35:45,947 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:35:45,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:35:45,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:35:45,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:35:46,081 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:46,081 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:46,082 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 17 treesize of output 13 [2021-06-05 04:35:46,083 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:46,085 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:46,085 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 16 treesize of output 12 [2021-06-05 04:35:46,086 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:46,122 INFO L628 ElimStorePlain]: treesize reduction 60, result has 38.8 percent of original size [2021-06-05 04:35:46,122 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 04:35:46,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index 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 04:35:46,125 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:46,137 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:35:46,137 INFO L518 ElimStorePlain]: Eliminatee v_prenex_297 vanished before elimination [2021-06-05 04:35:46,138 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 04:35:46,138 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-06-05 04:35:46,167 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:35:46,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [158522985] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:35:46,167 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:35:46,167 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 04:35:46,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882461608] [2021-06-05 04:35:46,167 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:35:46,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:35:46,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:35:46,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:35:46,168 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 04:35:46,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:35:46,758 INFO L93 Difference]: Finished difference Result 212 states and 452 transitions. [2021-06-05 04:35:46,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 04:35:46,758 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:35:46,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:35:46,758 INFO L225 Difference]: With dead ends: 212 [2021-06-05 04:35:46,758 INFO L226 Difference]: Without dead ends: 209 [2021-06-05 04:35:46,759 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 548.2ms TimeCoverageRelationStatistics Valid=93, Invalid=609, Unknown=0, NotChecked=0, Total=702 [2021-06-05 04:35:46,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2021-06-05 04:35:46,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 178. [2021-06-05 04:35:46,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 2.231638418079096) internal successors, (395), 177 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:46,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 395 transitions. [2021-06-05 04:35:46,760 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 395 transitions. Word has length 19 [2021-06-05 04:35:46,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:35:46,760 INFO L482 AbstractCegarLoop]: Abstraction has 178 states and 395 transitions. [2021-06-05 04:35:46,760 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 04:35:46,760 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 395 transitions. [2021-06-05 04:35:46,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:35:46,760 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:35:46,761 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:35:46,961 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1717,329 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:35:46,961 INFO L430 AbstractCegarLoop]: === Iteration 335 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:35:46,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:35:46,961 INFO L82 PathProgramCache]: Analyzing trace with hash -995027344, now seen corresponding path program 329 times [2021-06-05 04:35:46,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:35:46,961 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809705540] [2021-06-05 04:35:46,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:35:46,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:35:47,052 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:35:47,053 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:35:47,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809705540] [2021-06-05 04:35:47,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809705540] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:35:47,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011067495] [2021-06-05 04:35:47,053 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 04:35:47,084 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 04:35:47,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:35:47,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:35:47,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:35:47,256 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:35:47,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2011067495] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:35:47,256 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:35:47,257 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:35:47,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368523771] [2021-06-05 04:35:47,257 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:35:47,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:35:47,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:35:47,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:35:47,257 INFO L87 Difference]: Start difference. First operand 178 states and 395 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:47,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:35:47,881 INFO L93 Difference]: Finished difference Result 243 states and 525 transitions. [2021-06-05 04:35:47,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 04:35:47,882 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 04:35:47,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:35:47,882 INFO L225 Difference]: With dead ends: 243 [2021-06-05 04:35:47,882 INFO L226 Difference]: Without dead ends: 243 [2021-06-05 04:35:47,882 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 547.1ms TimeCoverageRelationStatistics Valid=131, Invalid=799, Unknown=0, NotChecked=0, Total=930 [2021-06-05 04:35:47,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2021-06-05 04:35:47,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 178. [2021-06-05 04:35:47,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 2.231638418079096) internal successors, (395), 177 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:47,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 395 transitions. [2021-06-05 04:35:47,884 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 395 transitions. Word has length 19 [2021-06-05 04:35:47,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:35:47,884 INFO L482 AbstractCegarLoop]: Abstraction has 178 states and 395 transitions. [2021-06-05 04:35:47,884 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 04:35:47,884 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 395 transitions. [2021-06-05 04:35:47,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:35:47,884 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:35:47,884 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:35:48,085 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1725,330 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:35:48,085 INFO L430 AbstractCegarLoop]: === Iteration 336 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:35:48,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:35:48,085 INFO L82 PathProgramCache]: Analyzing trace with hash -284979574, now seen corresponding path program 330 times [2021-06-05 04:35:48,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:35:48,085 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835238745] [2021-06-05 04:35:48,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:35:48,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:35:48,174 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:35:48,175 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:35:48,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835238745] [2021-06-05 04:35:48,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835238745] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:35:48,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707698453] [2021-06-05 04:35:48,175 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 331 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 331 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:35:48,325 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:35:48,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:35:48,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 04:35:48,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:35:48,459 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:48,460 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:48,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:35:48,461 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:48,463 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:48,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 04:35:48,464 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:48,511 INFO L628 ElimStorePlain]: treesize reduction 74, result has 41.7 percent of original size [2021-06-05 04:35:48,513 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:48,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-06-05 04:35:48,514 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:35:48,531 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:35:48,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:35:48,533 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:48,548 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:35:48,548 INFO L518 ElimStorePlain]: Eliminatee v_prenex_301 vanished before elimination [2021-06-05 04:35:48,549 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 04:35:48,549 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:141, output treesize:22 [2021-06-05 04:35:48,592 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:35:48,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [707698453] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:35:48,592 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:35:48,592 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:35:48,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399155169] [2021-06-05 04:35:48,592 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:35:48,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:35:48,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:35:48,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:35:48,593 INFO L87 Difference]: Start difference. First operand 178 states and 395 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:48,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:35:48,873 INFO L93 Difference]: Finished difference Result 197 states and 431 transitions. [2021-06-05 04:35:48,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:35:48,873 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 04:35:48,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:35:48,873 INFO L225 Difference]: With dead ends: 197 [2021-06-05 04:35:48,873 INFO L226 Difference]: Without dead ends: 197 [2021-06-05 04:35:48,874 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 297.5ms TimeCoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:35:48,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-06-05 04:35:48,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 170. [2021-06-05 04:35:48,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 169 states have (on average 2.2366863905325443) internal successors, (378), 169 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:48,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 378 transitions. [2021-06-05 04:35:48,875 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 378 transitions. Word has length 19 [2021-06-05 04:35:48,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:35:48,875 INFO L482 AbstractCegarLoop]: Abstraction has 170 states and 378 transitions. [2021-06-05 04:35:48,875 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 04:35:48,875 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 378 transitions. [2021-06-05 04:35:48,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:35:48,875 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:35:48,876 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:35:49,076 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 331 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1737 [2021-06-05 04:35:49,076 INFO L430 AbstractCegarLoop]: === Iteration 337 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:35:49,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:35:49,076 INFO L82 PathProgramCache]: Analyzing trace with hash 1084115286, now seen corresponding path program 331 times [2021-06-05 04:35:49,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:35:49,076 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872220974] [2021-06-05 04:35:49,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:35:49,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:35:49,183 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:35:49,183 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:35:49,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872220974] [2021-06-05 04:35:49,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872220974] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:35:49,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802979206] [2021-06-05 04:35:49,183 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 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 04:35:49,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:35:49,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:35:49,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:35:49,338 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 04:35:49,338 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [802979206] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:35:49,338 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:35:49,338 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 04:35:49,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499713723] [2021-06-05 04:35:49,338 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:35:49,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:35:49,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:35:49,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:35:49,339 INFO L87 Difference]: Start difference. First operand 170 states and 378 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:49,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:35:49,556 INFO L93 Difference]: Finished difference Result 208 states and 453 transitions. [2021-06-05 04:35:49,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:35:49,556 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 04:35:49,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:35:49,556 INFO L225 Difference]: With dead ends: 208 [2021-06-05 04:35:49,556 INFO L226 Difference]: Without dead ends: 208 [2021-06-05 04:35:49,557 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 221.1ms TimeCoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:35:49,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-06-05 04:35:49,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 171. [2021-06-05 04:35:49,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 2.235294117647059) internal successors, (380), 170 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:49,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 380 transitions. [2021-06-05 04:35:49,558 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 380 transitions. Word has length 19 [2021-06-05 04:35:49,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:35:49,558 INFO L482 AbstractCegarLoop]: Abstraction has 171 states and 380 transitions. [2021-06-05 04:35:49,558 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 04:35:49,558 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 380 transitions. [2021-06-05 04:35:49,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:35:49,558 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:35:49,558 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:35:49,759 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 332 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1743 [2021-06-05 04:35:49,759 INFO L430 AbstractCegarLoop]: === Iteration 338 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:35:49,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:35:49,759 INFO L82 PathProgramCache]: Analyzing trace with hash 724198768, now seen corresponding path program 332 times [2021-06-05 04:35:49,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:35:49,759 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955401961] [2021-06-05 04:35:49,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:35:49,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:35:49,844 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:35:49,844 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:35:49,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955401961] [2021-06-05 04:35:49,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955401961] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:35:49,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119080860] [2021-06-05 04:35:49,844 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 333 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 333 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:35:49,869 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:35:49,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:35:49,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 04:35:49,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:35:49,970 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:49,971 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:49,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:35:49,972 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:49,974 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:49,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:35:49,975 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:50,019 INFO L628 ElimStorePlain]: treesize reduction 78, result has 35.5 percent of original size [2021-06-05 04:35:50,019 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 04:35:50,021 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 9 treesize of output 7 [2021-06-05 04:35:50,022 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:50,037 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:35:50,037 INFO L518 ElimStorePlain]: Eliminatee v_prenex_303 vanished before elimination [2021-06-05 04:35:50,038 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 04:35:50,038 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:133, output treesize:22 [2021-06-05 04:35:50,079 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:35:50,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [119080860] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:35:50,079 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:35:50,079 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:35:50,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301979534] [2021-06-05 04:35:50,079 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:35:50,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:35:50,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:35:50,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:35:50,080 INFO L87 Difference]: Start difference. First operand 171 states and 380 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:50,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:35:50,299 INFO L93 Difference]: Finished difference Result 226 states and 489 transitions. [2021-06-05 04:35:50,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:35:50,299 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 04:35:50,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:35:50,299 INFO L225 Difference]: With dead ends: 226 [2021-06-05 04:35:50,299 INFO L226 Difference]: Without dead ends: 226 [2021-06-05 04:35:50,300 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 247.8ms TimeCoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:35:50,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-06-05 04:35:50,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 172. [2021-06-05 04:35:50,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 171 states have (on average 2.2339181286549707) internal successors, (382), 171 states have internal predecessors, (382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:50,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 382 transitions. [2021-06-05 04:35:50,301 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 382 transitions. Word has length 19 [2021-06-05 04:35:50,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:35:50,301 INFO L482 AbstractCegarLoop]: Abstraction has 172 states and 382 transitions. [2021-06-05 04:35:50,301 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 04:35:50,301 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 382 transitions. [2021-06-05 04:35:50,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:35:50,302 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:35:50,302 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:35:50,502 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 333 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1747 [2021-06-05 04:35:50,502 INFO L430 AbstractCegarLoop]: === Iteration 339 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:35:50,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:35:50,502 INFO L82 PathProgramCache]: Analyzing trace with hash 1434246538, now seen corresponding path program 333 times [2021-06-05 04:35:50,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:35:50,502 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987131576] [2021-06-05 04:35:50,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:35:50,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:35:50,590 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:35:50,590 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:35:50,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987131576] [2021-06-05 04:35:50,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987131576] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:35:50,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [523034454] [2021-06-05 04:35:50,590 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 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 04:35:50,616 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 04:35:50,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:35:50,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 04:35:50,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:35:50,721 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:50,721 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:50,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:35:50,722 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:50,725 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:50,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 04:35:50,726 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:50,773 INFO L628 ElimStorePlain]: treesize reduction 74, result has 41.7 percent of original size [2021-06-05 04:35:50,775 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:50,775 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 9 treesize of output 5 [2021-06-05 04:35:50,777 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:35:50,793 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:35:50,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-05 04:35:50,796 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:50,811 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:35:50,811 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 04:35:50,812 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 04:35:50,812 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:141, output treesize:22 [2021-06-05 04:35:50,853 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:35:50,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [523034454] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:35:50,853 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:35:50,853 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:35:50,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127151695] [2021-06-05 04:35:50,853 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:35:50,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:35:50,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:35:50,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:35:50,854 INFO L87 Difference]: Start difference. First operand 172 states and 382 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:51,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:35:51,103 INFO L93 Difference]: Finished difference Result 197 states and 431 transitions. [2021-06-05 04:35:51,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 04:35:51,103 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 04:35:51,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:35:51,104 INFO L225 Difference]: With dead ends: 197 [2021-06-05 04:35:51,104 INFO L226 Difference]: Without dead ends: 197 [2021-06-05 04:35:51,104 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 273.1ms TimeCoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:35:51,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-06-05 04:35:51,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 170. [2021-06-05 04:35:51,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 169 states have (on average 2.2366863905325443) internal successors, (378), 169 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:51,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 378 transitions. [2021-06-05 04:35:51,122 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 378 transitions. Word has length 19 [2021-06-05 04:35:51,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:35:51,122 INFO L482 AbstractCegarLoop]: Abstraction has 170 states and 378 transitions. [2021-06-05 04:35:51,122 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 04:35:51,122 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 378 transitions. [2021-06-05 04:35:51,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:35:51,123 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:35:51,123 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:35:51,340 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1751,334 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:35:51,340 INFO L430 AbstractCegarLoop]: === Iteration 340 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:35:51,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:35:51,341 INFO L82 PathProgramCache]: Analyzing trace with hash -1808722854, now seen corresponding path program 334 times [2021-06-05 04:35:51,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:35:51,341 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829770477] [2021-06-05 04:35:51,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:35:51,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:35:51,415 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:35:51,415 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:35:51,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829770477] [2021-06-05 04:35:51,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829770477] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:35:51,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980196800] [2021-06-05 04:35:51,416 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 335 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 335 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:35:51,440 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:35:51,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:35:51,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:35:51,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:35:51,544 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:51,545 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:51,545 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 17 treesize of output 13 [2021-06-05 04:35:51,546 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:51,548 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:51,548 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:51,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:35:51,549 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:51,551 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:51,552 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:51,552 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 04:35:51,552 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:51,554 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:51,554 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 04:35:51,555 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:51,586 INFO L628 ElimStorePlain]: treesize reduction 53, result has 36.9 percent of original size [2021-06-05 04:35:51,587 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 04:35:51,587 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 04:35:51,587 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:121, output treesize:15 [2021-06-05 04:35:51,614 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:35:51,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [980196800] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:35:51,614 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:35:51,614 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 04:35:51,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904993472] [2021-06-05 04:35:51,614 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:35:51,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:35:51,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:35:51,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:35:51,615 INFO L87 Difference]: Start difference. First operand 170 states and 378 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:52,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:35:52,048 INFO L93 Difference]: Finished difference Result 231 states and 487 transitions. [2021-06-05 04:35:52,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 04:35:52,049 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 04:35:52,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:35:52,049 INFO L225 Difference]: With dead ends: 231 [2021-06-05 04:35:52,049 INFO L226 Difference]: Without dead ends: 228 [2021-06-05 04:35:52,049 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 423.3ms TimeCoverageRelationStatistics Valid=125, Invalid=805, Unknown=0, NotChecked=0, Total=930 [2021-06-05 04:35:52,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2021-06-05 04:35:52,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 175. [2021-06-05 04:35:52,051 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 04:35:52,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 389 transitions. [2021-06-05 04:35:52,051 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 389 transitions. Word has length 19 [2021-06-05 04:35:52,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:35:52,051 INFO L482 AbstractCegarLoop]: Abstraction has 175 states and 389 transitions. [2021-06-05 04:35:52,051 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 04:35:52,051 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 389 transitions. [2021-06-05 04:35:52,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:35:52,051 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:35:52,051 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:35:52,252 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 335 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1755 [2021-06-05 04:35:52,252 INFO L430 AbstractCegarLoop]: === Iteration 341 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:35:52,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:35:52,252 INFO L82 PathProgramCache]: Analyzing trace with hash -1382585352, now seen corresponding path program 335 times [2021-06-05 04:35:52,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:35:52,252 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235398613] [2021-06-05 04:35:52,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:35:52,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:35:52,335 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:35:52,335 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:35:52,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235398613] [2021-06-05 04:35:52,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235398613] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:35:52,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1696673245] [2021-06-05 04:35:52,335 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 336 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 336 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:35:52,360 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:35:52,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:35:52,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:35:52,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:35:52,484 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 04:35:52,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1696673245] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:35:52,484 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:35:52,484 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 04:35:52,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312591755] [2021-06-05 04:35:52,484 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:35:52,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:35:52,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:35:52,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:35:52,485 INFO L87 Difference]: Start difference. First operand 175 states and 389 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:52,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:35:52,795 INFO L93 Difference]: Finished difference Result 209 states and 448 transitions. [2021-06-05 04:35:52,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:35:52,795 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 04:35:52,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:35:52,795 INFO L225 Difference]: With dead ends: 209 [2021-06-05 04:35:52,795 INFO L226 Difference]: Without dead ends: 209 [2021-06-05 04:35:52,796 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 310.3ms TimeCoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:35:52,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2021-06-05 04:35:52,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 175. [2021-06-05 04:35:52,797 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 04:35:52,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 389 transitions. [2021-06-05 04:35:52,797 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 389 transitions. Word has length 19 [2021-06-05 04:35:52,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:35:52,797 INFO L482 AbstractCegarLoop]: Abstraction has 175 states and 389 transitions. [2021-06-05 04:35:52,797 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 04:35:52,797 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 389 transitions. [2021-06-05 04:35:52,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:35:52,798 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:35:52,798 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:35:52,998 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1766,336 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:35:52,998 INFO L430 AbstractCegarLoop]: === Iteration 342 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:35:52,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:35:52,998 INFO L82 PathProgramCache]: Analyzing trace with hash -672537582, now seen corresponding path program 336 times [2021-06-05 04:35:52,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:35:52,998 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054694547] [2021-06-05 04:35:52,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:35:53,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:35:53,077 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 04:35:53,077 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:35:53,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054694547] [2021-06-05 04:35:53,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054694547] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:35:53,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918145250] [2021-06-05 04:35:53,078 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 337 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 337 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:35:53,103 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:35:53,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:35:53,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 04:35:53,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:35:53,209 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:53,210 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:53,210 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 17 treesize of output 13 [2021-06-05 04:35:53,211 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:53,213 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:53,214 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:53,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 04:35:53,215 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:53,217 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:53,218 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:53,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:35:53,219 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:53,221 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:53,221 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 18 treesize of output 14 [2021-06-05 04:35:53,222 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:53,269 INFO L628 ElimStorePlain]: treesize reduction 69, result has 38.9 percent of original size [2021-06-05 04:35:53,272 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:53,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-06-05 04:35:53,274 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:35:53,297 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:35:53,298 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 04:35:53,298 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:141, output treesize:22 [2021-06-05 04:35:53,357 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:35:53,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1918145250] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:35:53,358 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:35:53,358 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:35:53,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016942212] [2021-06-05 04:35:53,358 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:35:53,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:35:53,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:35:53,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:35:53,358 INFO L87 Difference]: Start difference. First operand 175 states and 389 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:53,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:35:53,854 INFO L93 Difference]: Finished difference Result 242 states and 511 transitions. [2021-06-05 04:35:53,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 04:35:53,854 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 04:35:53,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:35:53,854 INFO L225 Difference]: With dead ends: 242 [2021-06-05 04:35:53,854 INFO L226 Difference]: Without dead ends: 242 [2021-06-05 04:35:53,854 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 455.9ms TimeCoverageRelationStatistics Valid=140, Invalid=852, Unknown=0, NotChecked=0, Total=992 [2021-06-05 04:35:53,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2021-06-05 04:35:53,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 174. [2021-06-05 04:35:53,856 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 04:35:53,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 387 transitions. [2021-06-05 04:35:53,856 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 387 transitions. Word has length 19 [2021-06-05 04:35:53,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:35:53,856 INFO L482 AbstractCegarLoop]: Abstraction has 174 states and 387 transitions. [2021-06-05 04:35:53,856 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 04:35:53,856 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 387 transitions. [2021-06-05 04:35:53,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:35:53,856 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:35:53,856 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:35:54,057 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 337 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1778 [2021-06-05 04:35:54,057 INFO L430 AbstractCegarLoop]: === Iteration 343 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:35:54,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:35:54,057 INFO L82 PathProgramCache]: Analyzing trace with hash 1389377720, now seen corresponding path program 337 times [2021-06-05 04:35:54,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:35:54,057 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62040921] [2021-06-05 04:35:54,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:35:54,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:35:54,165 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 04:35:54,166 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:35:54,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62040921] [2021-06-05 04:35:54,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62040921] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:35:54,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695458383] [2021-06-05 04:35:54,166 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 338 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 338 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:35:54,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:35:54,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:35:54,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:35:54,303 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 04:35:54,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1695458383] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:35:54,303 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:35:54,303 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 04:35:54,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682975255] [2021-06-05 04:35:54,303 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:35:54,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:35:54,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:35:54,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:35:54,303 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 04:35:54,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:35:54,603 INFO L93 Difference]: Finished difference Result 183 states and 400 transitions. [2021-06-05 04:35:54,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:35:54,603 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 04:35:54,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:35:54,603 INFO L225 Difference]: With dead ends: 183 [2021-06-05 04:35:54,603 INFO L226 Difference]: Without dead ends: 179 [2021-06-05 04:35:54,603 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 330.3ms TimeCoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:35:54,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-06-05 04:35:54,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 174. [2021-06-05 04:35:54,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 173 states have (on average 2.23121387283237) internal successors, (386), 173 states have internal predecessors, (386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:54,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 386 transitions. [2021-06-05 04:35:54,605 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 386 transitions. Word has length 19 [2021-06-05 04:35:54,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:35:54,605 INFO L482 AbstractCegarLoop]: Abstraction has 174 states and 386 transitions. [2021-06-05 04:35:54,605 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 04:35:54,605 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 386 transitions. [2021-06-05 04:35:54,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:35:54,605 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:35:54,605 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:35:54,805 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 338 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1781 [2021-06-05 04:35:54,806 INFO L430 AbstractCegarLoop]: === Iteration 344 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:35:54,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:35:54,806 INFO L82 PathProgramCache]: Analyzing trace with hash 1476258954, now seen corresponding path program 338 times [2021-06-05 04:35:54,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:35:54,806 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047895925] [2021-06-05 04:35:54,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:35:54,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:35:54,884 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:35:54,884 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:35:54,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047895925] [2021-06-05 04:35:54,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047895925] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:35:54,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532252769] [2021-06-05 04:35:54,884 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 339 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 339 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:35:54,909 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:35:54,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:35:54,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 04:35:54,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:35:55,003 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:55,003 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:55,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:35:55,004 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:55,006 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:55,006 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 17 treesize of output 13 [2021-06-05 04:35:55,007 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:55,025 INFO L628 ElimStorePlain]: treesize reduction 30, result has 43.4 percent of original size [2021-06-05 04:35:55,027 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:55,027 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 9 treesize of output 5 [2021-06-05 04:35:55,028 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:35:55,033 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:35:55,034 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 04:35:55,034 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:67, output treesize:9 [2021-06-05 04:35:55,051 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 04:35:55,052 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [532252769] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:35:55,052 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:35:55,052 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:35:55,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396021982] [2021-06-05 04:35:55,052 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:35:55,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:35:55,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:35:55,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:35:55,053 INFO L87 Difference]: Start difference. First operand 174 states and 386 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:55,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:35:55,274 INFO L93 Difference]: Finished difference Result 204 states and 443 transitions. [2021-06-05 04:35:55,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:35:55,274 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 04:35:55,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:35:55,275 INFO L225 Difference]: With dead ends: 204 [2021-06-05 04:35:55,275 INFO L226 Difference]: Without dead ends: 204 [2021-06-05 04:35:55,275 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 247.6ms TimeCoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:35:55,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-06-05 04:35:55,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 167. [2021-06-05 04:35:55,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 2.2289156626506026) internal successors, (370), 166 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:55,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 370 transitions. [2021-06-05 04:35:55,276 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 370 transitions. Word has length 19 [2021-06-05 04:35:55,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:35:55,276 INFO L482 AbstractCegarLoop]: Abstraction has 167 states and 370 transitions. [2021-06-05 04:35:55,277 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 04:35:55,277 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 370 transitions. [2021-06-05 04:35:55,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:35:55,277 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:35:55,277 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:35:55,477 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 339 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1785 [2021-06-05 04:35:55,477 INFO L430 AbstractCegarLoop]: === Iteration 345 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:35:55,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:35:55,477 INFO L82 PathProgramCache]: Analyzing trace with hash 1376514694, now seen corresponding path program 339 times [2021-06-05 04:35:55,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:35:55,478 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944940140] [2021-06-05 04:35:55,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:35:55,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:35:55,566 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:35:55,566 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:35:55,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944940140] [2021-06-05 04:35:55,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944940140] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:35:55,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406447097] [2021-06-05 04:35:55,566 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 340 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 340 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:35:55,591 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:35:55,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:35:55,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:35:55,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:35:55,741 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 04:35:55,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [406447097] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:35:55,742 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:35:55,742 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:35:55,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298606227] [2021-06-05 04:35:55,742 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:35:55,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:35:55,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:35:55,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:35:55,742 INFO L87 Difference]: Start difference. First operand 167 states and 370 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:56,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:35:56,183 INFO L93 Difference]: Finished difference Result 208 states and 443 transitions. [2021-06-05 04:35:56,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:35:56,184 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 04:35:56,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:35:56,184 INFO L225 Difference]: With dead ends: 208 [2021-06-05 04:35:56,184 INFO L226 Difference]: Without dead ends: 208 [2021-06-05 04:35:56,184 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 421.8ms TimeCoverageRelationStatistics Valid=87, Invalid=615, Unknown=0, NotChecked=0, Total=702 [2021-06-05 04:35:56,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-06-05 04:35:56,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 170. [2021-06-05 04:35:56,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 169 states have (on average 2.2366863905325443) internal successors, (378), 169 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:56,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 378 transitions. [2021-06-05 04:35:56,186 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 378 transitions. Word has length 19 [2021-06-05 04:35:56,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:35:56,186 INFO L482 AbstractCegarLoop]: Abstraction has 170 states and 378 transitions. [2021-06-05 04:35:56,186 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 04:35:56,186 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 378 transitions. [2021-06-05 04:35:56,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:35:56,186 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:35:56,186 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:35:56,386 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 340 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1786 [2021-06-05 04:35:56,387 INFO L430 AbstractCegarLoop]: === Iteration 346 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:35:56,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:35:56,387 INFO L82 PathProgramCache]: Analyzing trace with hash -908266892, now seen corresponding path program 340 times [2021-06-05 04:35:56,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:35:56,387 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681260122] [2021-06-05 04:35:56,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:35:56,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:35:56,465 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:35:56,466 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:35:56,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681260122] [2021-06-05 04:35:56,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681260122] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:35:56,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216683940] [2021-06-05 04:35:56,466 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 341 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 341 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:35:56,495 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:35:56,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:35:56,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:35:56,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:35:56,608 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:56,609 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:56,609 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 04:35:56,610 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:56,612 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:56,612 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:56,612 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 16 treesize of output 12 [2021-06-05 04:35:56,613 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:56,615 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:56,615 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:56,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:35:56,616 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:56,618 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:56,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:35:56,619 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:56,651 INFO L628 ElimStorePlain]: treesize reduction 53, result has 36.9 percent of original size [2021-06-05 04:35:56,651 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 04:35:56,652 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:35:56,652 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:121, output treesize:15 [2021-06-05 04:35:56,688 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 04:35:56,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1216683940] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:35:56,688 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:35:56,688 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 04:35:56,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276606577] [2021-06-05 04:35:56,688 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:35:56,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:35:56,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:35:56,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:35:56,689 INFO L87 Difference]: Start difference. First operand 170 states and 378 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:57,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:35:57,276 INFO L93 Difference]: Finished difference Result 262 states and 551 transitions. [2021-06-05 04:35:57,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 04:35:57,276 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 04:35:57,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:35:57,277 INFO L225 Difference]: With dead ends: 262 [2021-06-05 04:35:57,277 INFO L226 Difference]: Without dead ends: 262 [2021-06-05 04:35:57,277 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 530.3ms TimeCoverageRelationStatistics Valid=151, Invalid=841, Unknown=0, NotChecked=0, Total=992 [2021-06-05 04:35:57,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-06-05 04:35:57,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 172. [2021-06-05 04:35:57,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 171 states have (on average 2.257309941520468) internal successors, (386), 171 states have internal predecessors, (386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:57,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 386 transitions. [2021-06-05 04:35:57,279 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 386 transitions. Word has length 19 [2021-06-05 04:35:57,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:35:57,279 INFO L482 AbstractCegarLoop]: Abstraction has 172 states and 386 transitions. [2021-06-05 04:35:57,279 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 04:35:57,279 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 386 transitions. [2021-06-05 04:35:57,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:35:57,279 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:35:57,279 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:35:57,479 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 341 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1796 [2021-06-05 04:35:57,479 INFO L430 AbstractCegarLoop]: === Iteration 347 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:35:57,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:35:57,480 INFO L82 PathProgramCache]: Analyzing trace with hash 503579440, now seen corresponding path program 341 times [2021-06-05 04:35:57,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:35:57,480 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518152754] [2021-06-05 04:35:57,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:35:57,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:35:57,563 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:35:57,563 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:35:57,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518152754] [2021-06-05 04:35:57,563 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518152754] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:35:57,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1854510280] [2021-06-05 04:35:57,563 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 04:35:57,589 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:35:57,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:35:57,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:35:57,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:35:57,706 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 04:35:57,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1854510280] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:35:57,707 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:35:57,707 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 04:35:57,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843230677] [2021-06-05 04:35:57,707 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:35:57,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:35:57,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:35:57,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:35:57,707 INFO L87 Difference]: Start difference. First operand 172 states and 386 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:58,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:35:58,114 INFO L93 Difference]: Finished difference Result 185 states and 405 transitions. [2021-06-05 04:35:58,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:35:58,114 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:35:58,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:35:58,115 INFO L225 Difference]: With dead ends: 185 [2021-06-05 04:35:58,115 INFO L226 Difference]: Without dead ends: 181 [2021-06-05 04:35:58,115 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 419.1ms TimeCoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:35:58,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-06-05 04:35:58,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 172. [2021-06-05 04:35:58,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 171 states have (on average 2.2514619883040936) internal successors, (385), 171 states have internal predecessors, (385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:58,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 385 transitions. [2021-06-05 04:35:58,116 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 385 transitions. Word has length 19 [2021-06-05 04:35:58,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:35:58,116 INFO L482 AbstractCegarLoop]: Abstraction has 172 states and 385 transitions. [2021-06-05 04:35:58,116 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 04:35:58,116 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 385 transitions. [2021-06-05 04:35:58,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:35:58,117 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:35:58,117 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:35:58,317 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1806,342 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:35:58,317 INFO L430 AbstractCegarLoop]: === Iteration 348 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:35:58,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:35:58,317 INFO L82 PathProgramCache]: Analyzing trace with hash 590460674, now seen corresponding path program 342 times [2021-06-05 04:35:58,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:35:58,318 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901575704] [2021-06-05 04:35:58,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:35:58,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:35:58,394 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 04:35:58,394 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:35:58,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901575704] [2021-06-05 04:35:58,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901575704] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:35:58,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257323569] [2021-06-05 04:35:58,394 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 343 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 343 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:35:58,420 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:35:58,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:35:58,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:35:58,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:35:58,533 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:58,533 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:58,533 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 04:35:58,534 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:58,536 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:58,536 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 04:35:58,537 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:58,550 INFO L628 ElimStorePlain]: treesize reduction 29, result has 32.6 percent of original size [2021-06-05 04:35:58,550 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 04:35:58,551 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 04:35:58,551 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:57, output treesize:6 [2021-06-05 04:35:58,562 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:35:58,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [257323569] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:35:58,563 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:35:58,563 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 04:35:58,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740742023] [2021-06-05 04:35:58,563 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:35:58,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:35:58,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:35:58,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:35:58,563 INFO L87 Difference]: Start difference. First operand 172 states and 385 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:58,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:35:58,962 INFO L93 Difference]: Finished difference Result 217 states and 469 transitions. [2021-06-05 04:35:58,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:35:58,963 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 04:35:58,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:35:58,963 INFO L225 Difference]: With dead ends: 217 [2021-06-05 04:35:58,963 INFO L226 Difference]: Without dead ends: 217 [2021-06-05 04:35:58,963 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 388.1ms TimeCoverageRelationStatistics Valid=117, Invalid=695, Unknown=0, NotChecked=0, Total=812 [2021-06-05 04:35:58,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-06-05 04:35:58,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 171. [2021-06-05 04:35:58,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 2.2529411764705882) internal successors, (383), 170 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:58,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 383 transitions. [2021-06-05 04:35:58,965 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 383 transitions. Word has length 19 [2021-06-05 04:35:58,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:35:58,965 INFO L482 AbstractCegarLoop]: Abstraction has 171 states and 383 transitions. [2021-06-05 04:35:58,965 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:58,965 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 383 transitions. [2021-06-05 04:35:58,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:35:58,965 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:35:58,965 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:35:59,165 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 343 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1810 [2021-06-05 04:35:59,165 INFO L430 AbstractCegarLoop]: === Iteration 349 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:35:59,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:35:59,166 INFO L82 PathProgramCache]: Analyzing trace with hash -2766826, now seen corresponding path program 343 times [2021-06-05 04:35:59,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:35:59,166 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540515950] [2021-06-05 04:35:59,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:35:59,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:35:59,249 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:35:59,249 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:35:59,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540515950] [2021-06-05 04:35:59,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540515950] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:35:59,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923417016] [2021-06-05 04:35:59,249 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 04:35:59,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:35:59,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:35:59,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:35:59,383 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 04:35:59,384 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [923417016] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:35:59,384 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:35:59,384 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 04:35:59,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890473436] [2021-06-05 04:35:59,384 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:35:59,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:35:59,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:35:59,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:35:59,384 INFO L87 Difference]: Start difference. First operand 171 states and 383 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:59,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:35:59,633 INFO L93 Difference]: Finished difference Result 182 states and 399 transitions. [2021-06-05 04:35:59,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:35:59,634 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 04:35:59,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:35:59,634 INFO L225 Difference]: With dead ends: 182 [2021-06-05 04:35:59,634 INFO L226 Difference]: Without dead ends: 176 [2021-06-05 04:35:59,634 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 277.7ms TimeCoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:35:59,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-06-05 04:35:59,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 171. [2021-06-05 04:35:59,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 2.2470588235294118) internal successors, (382), 170 states have internal predecessors, (382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:59,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 382 transitions. [2021-06-05 04:35:59,636 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 382 transitions. Word has length 19 [2021-06-05 04:35:59,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:35:59,636 INFO L482 AbstractCegarLoop]: Abstraction has 171 states and 382 transitions. [2021-06-05 04:35:59,636 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 04:35:59,636 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 382 transitions. [2021-06-05 04:35:59,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:35:59,636 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:35:59,636 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:35:59,836 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1814,344 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:35:59,836 INFO L430 AbstractCegarLoop]: === Iteration 350 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:35:59,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:35:59,837 INFO L82 PathProgramCache]: Analyzing trace with hash -1516323446, now seen corresponding path program 344 times [2021-06-05 04:35:59,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:35:59,837 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063544880] [2021-06-05 04:35:59,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:35:59,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:35:59,910 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 04:35:59,910 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:35:59,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063544880] [2021-06-05 04:35:59,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063544880] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:35:59,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1129209529] [2021-06-05 04:35:59,911 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 345 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 345 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:35:59,935 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:35:59,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:35:59,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 04:35:59,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:36:00,032 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:00,033 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:00,033 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 17 treesize of output 13 [2021-06-05 04:36:00,034 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:00,035 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:00,036 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 17 treesize of output 13 [2021-06-05 04:36:00,036 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:00,054 INFO L628 ElimStorePlain]: treesize reduction 36, result has 32.1 percent of original size [2021-06-05 04:36:00,054 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 04:36:00,054 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 04:36:00,054 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:67, output treesize:9 [2021-06-05 04:36:00,073 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:36:00,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1129209529] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:00,073 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:36:00,073 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:36:00,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261833382] [2021-06-05 04:36:00,073 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:36:00,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:36:00,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:36:00,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:36:00,073 INFO L87 Difference]: Start difference. First operand 171 states and 382 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:00,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:36:00,292 INFO L93 Difference]: Finished difference Result 202 states and 438 transitions. [2021-06-05 04:36:00,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:36:00,292 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 04:36:00,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:36:00,292 INFO L225 Difference]: With dead ends: 202 [2021-06-05 04:36:00,292 INFO L226 Difference]: Without dead ends: 202 [2021-06-05 04:36:00,292 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 226.2ms TimeCoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:36:00,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-06-05 04:36:00,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 168. [2021-06-05 04:36:00,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 2.2275449101796405) internal successors, (372), 167 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:00,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 372 transitions. [2021-06-05 04:36:00,294 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 372 transitions. Word has length 19 [2021-06-05 04:36:00,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:36:00,294 INFO L482 AbstractCegarLoop]: Abstraction has 168 states and 372 transitions. [2021-06-05 04:36:00,294 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 04:36:00,294 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 372 transitions. [2021-06-05 04:36:00,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:36:00,294 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:36:00,294 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:36:00,494 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1818,345 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:36:00,495 INFO L430 AbstractCegarLoop]: === Iteration 351 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:36:00,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:36:00,495 INFO L82 PathProgramCache]: Analyzing trace with hash -954493294, now seen corresponding path program 345 times [2021-06-05 04:36:00,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:36:00,495 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937279880] [2021-06-05 04:36:00,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:36:00,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:36:00,571 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:36:00,571 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:36:00,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937279880] [2021-06-05 04:36:00,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937279880] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:00,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750512208] [2021-06-05 04:36:00,571 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 346 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 346 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:36:00,596 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:36:00,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:36:00,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:36:00,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:36:00,758 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 04:36:00,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [750512208] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:00,759 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:36:00,759 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 04:36:00,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772364815] [2021-06-05 04:36:00,759 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:36:00,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:36:00,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:36:00,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:36:00,759 INFO L87 Difference]: Start difference. First operand 168 states and 372 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:00,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:36:00,898 INFO L93 Difference]: Finished difference Result 187 states and 410 transitions. [2021-06-05 04:36:00,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:36:00,899 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:36:00,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:36:00,899 INFO L225 Difference]: With dead ends: 187 [2021-06-05 04:36:00,899 INFO L226 Difference]: Without dead ends: 187 [2021-06-05 04:36:00,899 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 179.8ms TimeCoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:36:00,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-06-05 04:36:00,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 168. [2021-06-05 04:36:00,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 2.2275449101796405) internal successors, (372), 167 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:00,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 372 transitions. [2021-06-05 04:36:00,900 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 372 transitions. Word has length 19 [2021-06-05 04:36:00,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:36:00,901 INFO L482 AbstractCegarLoop]: Abstraction has 168 states and 372 transitions. [2021-06-05 04:36:00,901 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 04:36:00,901 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 372 transitions. [2021-06-05 04:36:00,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:36:00,901 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:36:00,901 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:36:01,101 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 346 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1819 [2021-06-05 04:36:01,101 INFO L430 AbstractCegarLoop]: === Iteration 352 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:36:01,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:36:01,102 INFO L82 PathProgramCache]: Analyzing trace with hash -887938366, now seen corresponding path program 346 times [2021-06-05 04:36:01,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:36:01,102 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538864286] [2021-06-05 04:36:01,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:36:01,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:36:01,180 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:36:01,180 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:36:01,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538864286] [2021-06-05 04:36:01,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538864286] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:01,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [447719781] [2021-06-05 04:36:01,180 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 347 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 347 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:36:01,204 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:36:01,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:36:01,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 04:36:01,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:36:01,362 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:01,362 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:01,363 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 17 treesize of output 13 [2021-06-05 04:36:01,363 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:01,365 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:01,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:36:01,366 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:01,382 INFO L628 ElimStorePlain]: treesize reduction 36, result has 29.4 percent of original size [2021-06-05 04:36:01,382 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 04:36:01,383 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 04:36:01,383 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:63, output treesize:9 [2021-06-05 04:36:01,400 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 04:36:01,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [447719781] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:01,400 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:36:01,400 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 04:36:01,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607849356] [2021-06-05 04:36:01,400 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:36:01,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:36:01,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:36:01,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:36:01,401 INFO L87 Difference]: Start difference. First operand 168 states and 372 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:01,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:36:01,747 INFO L93 Difference]: Finished difference Result 207 states and 450 transitions. [2021-06-05 04:36:01,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:36:01,747 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:36:01,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:36:01,748 INFO L225 Difference]: With dead ends: 207 [2021-06-05 04:36:01,748 INFO L226 Difference]: Without dead ends: 207 [2021-06-05 04:36:01,748 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 391.9ms TimeCoverageRelationStatistics Valid=99, Invalid=657, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:36:01,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-06-05 04:36:01,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 168. [2021-06-05 04:36:01,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 2.2275449101796405) internal successors, (372), 167 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:01,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 372 transitions. [2021-06-05 04:36:01,749 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 372 transitions. Word has length 19 [2021-06-05 04:36:01,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:36:01,750 INFO L482 AbstractCegarLoop]: Abstraction has 168 states and 372 transitions. [2021-06-05 04:36:01,750 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 04:36:01,750 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 372 transitions. [2021-06-05 04:36:01,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:36:01,750 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:36:01,750 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:36:01,950 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 347 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1823 [2021-06-05 04:36:01,950 INFO L430 AbstractCegarLoop]: === Iteration 353 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:36:01,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:36:01,951 INFO L82 PathProgramCache]: Analyzing trace with hash -2132717422, now seen corresponding path program 347 times [2021-06-05 04:36:01,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:36:01,951 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003708989] [2021-06-05 04:36:01,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:36:01,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:36:02,054 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:36:02,054 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:36:02,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003708989] [2021-06-05 04:36:02,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003708989] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:02,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731701948] [2021-06-05 04:36:02,054 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 348 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 348 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:36:02,079 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:36:02,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:36:02,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:36:02,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:36:02,256 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 04:36:02,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [731701948] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:02,256 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:36:02,256 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:36:02,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687570730] [2021-06-05 04:36:02,256 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:36:02,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:36:02,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:36:02,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:36:02,256 INFO L87 Difference]: Start difference. First operand 168 states and 372 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:02,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:36:02,725 INFO L93 Difference]: Finished difference Result 219 states and 473 transitions. [2021-06-05 04:36:02,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:36:02,726 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 04:36:02,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:36:02,726 INFO L225 Difference]: With dead ends: 219 [2021-06-05 04:36:02,726 INFO L226 Difference]: Without dead ends: 219 [2021-06-05 04:36:02,726 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 483.4ms TimeCoverageRelationStatistics Valid=102, Invalid=600, Unknown=0, NotChecked=0, Total=702 [2021-06-05 04:36:02,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2021-06-05 04:36:02,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 168. [2021-06-05 04:36:02,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 2.2275449101796405) internal successors, (372), 167 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:02,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 372 transitions. [2021-06-05 04:36:02,728 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 372 transitions. Word has length 19 [2021-06-05 04:36:02,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:36:02,728 INFO L482 AbstractCegarLoop]: Abstraction has 168 states and 372 transitions. [2021-06-05 04:36:02,728 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 04:36:02,728 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 372 transitions. [2021-06-05 04:36:02,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:36:02,728 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:36:02,728 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:36:02,928 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1825,348 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:36:02,929 INFO L430 AbstractCegarLoop]: === Iteration 354 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:36:02,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:36:02,929 INFO L82 PathProgramCache]: Analyzing trace with hash 1152264386, now seen corresponding path program 348 times [2021-06-05 04:36:02,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:36:02,929 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477916301] [2021-06-05 04:36:02,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:36:02,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:36:03,010 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:36:03,010 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:36:03,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477916301] [2021-06-05 04:36:03,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477916301] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:03,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978139444] [2021-06-05 04:36:03,011 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 349 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 349 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:36:03,036 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:36:03,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:36:03,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 04:36:03,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:36:03,193 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:03,194 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:03,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 04:36:03,194 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:03,197 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:03,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 04:36:03,198 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:03,242 INFO L628 ElimStorePlain]: treesize reduction 72, result has 41.5 percent of original size [2021-06-05 04:36:03,244 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:03,244 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 12 treesize of output 8 [2021-06-05 04:36:03,246 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:36:03,262 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:36:03,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:36:03,265 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:03,280 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:36:03,280 INFO L518 ElimStorePlain]: Eliminatee v_prenex_312 vanished before elimination [2021-06-05 04:36:03,281 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 04:36:03,281 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:133, output treesize:22 [2021-06-05 04:36:03,326 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 04:36:03,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1978139444] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:03,326 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:36:03,326 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 04:36:03,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194118779] [2021-06-05 04:36:03,326 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:36:03,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:36:03,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:36:03,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:36:03,327 INFO L87 Difference]: Start difference. First operand 168 states and 372 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:03,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:36:03,824 INFO L93 Difference]: Finished difference Result 224 states and 483 transitions. [2021-06-05 04:36:03,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:36:03,825 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:36:03,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:36:03,825 INFO L225 Difference]: With dead ends: 224 [2021-06-05 04:36:03,825 INFO L226 Difference]: Without dead ends: 224 [2021-06-05 04:36:03,825 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 542.8ms TimeCoverageRelationStatistics Valid=108, Invalid=704, Unknown=0, NotChecked=0, Total=812 [2021-06-05 04:36:03,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-06-05 04:36:03,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 168. [2021-06-05 04:36:03,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 2.2275449101796405) internal successors, (372), 167 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:03,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 372 transitions. [2021-06-05 04:36:03,827 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 372 transitions. Word has length 19 [2021-06-05 04:36:03,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:36:03,827 INFO L482 AbstractCegarLoop]: Abstraction has 168 states and 372 transitions. [2021-06-05 04:36:03,827 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 04:36:03,827 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 372 transitions. [2021-06-05 04:36:03,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:36:03,827 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:36:03,827 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:36:04,027 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1829,349 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:36:04,028 INFO L430 AbstractCegarLoop]: === Iteration 355 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:36:04,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:36:04,028 INFO L82 PathProgramCache]: Analyzing trace with hash -1132517200, now seen corresponding path program 349 times [2021-06-05 04:36:04,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:36:04,028 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273032173] [2021-06-05 04:36:04,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:36:04,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:36:04,131 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:36:04,132 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:36:04,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273032173] [2021-06-05 04:36:04,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273032173] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:04,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551295934] [2021-06-05 04:36:04,132 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 350 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 350 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:36:04,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:36:04,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:36:04,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:36:04,324 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:04,325 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:04,325 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 16 treesize of output 12 [2021-06-05 04:36:04,326 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:04,328 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:04,328 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 15 treesize of output 11 [2021-06-05 04:36:04,329 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:04,367 INFO L628 ElimStorePlain]: treesize reduction 68, result has 36.4 percent of original size [2021-06-05 04:36:04,367 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 04:36:04,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:36:04,370 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:04,382 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:36:04,382 INFO L518 ElimStorePlain]: Eliminatee v_prenex_315 vanished before elimination [2021-06-05 04:36:04,383 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 04:36:04,383 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-06-05 04:36:04,411 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 04:36:04,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [551295934] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:04,412 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:36:04,412 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:36:04,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23172286] [2021-06-05 04:36:04,412 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:36:04,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:36:04,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:36:04,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:36:04,412 INFO L87 Difference]: Start difference. First operand 168 states and 372 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:04,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:36:04,813 INFO L93 Difference]: Finished difference Result 186 states and 406 transitions. [2021-06-05 04:36:04,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:36:04,814 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:36:04,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:36:04,814 INFO L225 Difference]: With dead ends: 186 [2021-06-05 04:36:04,814 INFO L226 Difference]: Without dead ends: 186 [2021-06-05 04:36:04,814 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 451.0ms TimeCoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:36:04,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-06-05 04:36:04,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 161. [2021-06-05 04:36:04,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 2.2) internal successors, (352), 160 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:04,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 352 transitions. [2021-06-05 04:36:04,815 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 352 transitions. Word has length 19 [2021-06-05 04:36:04,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:36:04,815 INFO L482 AbstractCegarLoop]: Abstraction has 161 states and 352 transitions. [2021-06-05 04:36:04,816 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:04,816 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 352 transitions. [2021-06-05 04:36:04,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:36:04,816 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:36:04,816 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:36:05,016 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 350 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1833 [2021-06-05 04:36:05,016 INFO L430 AbstractCegarLoop]: === Iteration 356 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:36:05,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:36:05,017 INFO L82 PathProgramCache]: Analyzing trace with hash -2128105322, now seen corresponding path program 350 times [2021-06-05 04:36:05,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:36:05,017 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407121041] [2021-06-05 04:36:05,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:36:05,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:36:05,093 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:36:05,093 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:36:05,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407121041] [2021-06-05 04:36:05,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407121041] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:05,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134839993] [2021-06-05 04:36:05,094 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 351 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 351 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:36:05,118 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:36:05,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:36:05,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 04:36:05,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:36:05,270 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:36:05,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [134839993] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:05,270 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:36:05,270 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:36:05,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162964338] [2021-06-05 04:36:05,271 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:36:05,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:36:05,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:36:05,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:36:05,271 INFO L87 Difference]: Start difference. First operand 161 states and 352 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:05,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:36:05,445 INFO L93 Difference]: Finished difference Result 174 states and 373 transitions. [2021-06-05 04:36:05,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:36:05,445 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 04:36:05,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:36:05,445 INFO L225 Difference]: With dead ends: 174 [2021-06-05 04:36:05,445 INFO L226 Difference]: Without dead ends: 165 [2021-06-05 04:36:05,445 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 230.2ms TimeCoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:36:05,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-06-05 04:36:05,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 161. [2021-06-05 04:36:05,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 2.2) internal successors, (352), 160 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:05,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 352 transitions. [2021-06-05 04:36:05,447 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 352 transitions. Word has length 19 [2021-06-05 04:36:05,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:36:05,447 INFO L482 AbstractCegarLoop]: Abstraction has 161 states and 352 transitions. [2021-06-05 04:36:05,447 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 04:36:05,447 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 352 transitions. [2021-06-05 04:36:05,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:36:05,447 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:36:05,447 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:36:05,647 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 351 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1840 [2021-06-05 04:36:05,647 INFO L430 AbstractCegarLoop]: === Iteration 357 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:36:05,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:36:05,648 INFO L82 PathProgramCache]: Analyzing trace with hash 1717086026, now seen corresponding path program 351 times [2021-06-05 04:36:05,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:36:05,648 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507915153] [2021-06-05 04:36:05,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:36:05,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:36:05,721 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:36:05,721 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:36:05,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507915153] [2021-06-05 04:36:05,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507915153] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:05,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011988161] [2021-06-05 04:36:05,722 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 352 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 352 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:36:05,746 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:36:05,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:36:05,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 04:36:05,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:36:05,882 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:05,882 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:05,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:36:05,883 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:05,885 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:05,885 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 17 treesize of output 13 [2021-06-05 04:36:05,886 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:05,902 INFO L628 ElimStorePlain]: treesize reduction 38, result has 28.3 percent of original size [2021-06-05 04:36:05,902 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 04:36:05,903 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:36:05,903 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:63, output treesize:9 [2021-06-05 04:36:05,920 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 04:36:05,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2011988161] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:05,920 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:36:05,920 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 04:36:05,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888811518] [2021-06-05 04:36:05,920 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:36:05,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:36:05,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:36:05,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:36:05,921 INFO L87 Difference]: Start difference. First operand 161 states and 352 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:06,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:36:06,108 INFO L93 Difference]: Finished difference Result 192 states and 414 transitions. [2021-06-05 04:36:06,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:36:06,109 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:36:06,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:36:06,109 INFO L225 Difference]: With dead ends: 192 [2021-06-05 04:36:06,109 INFO L226 Difference]: Without dead ends: 192 [2021-06-05 04:36:06,109 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 192.3ms TimeCoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:36:06,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-06-05 04:36:06,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 162. [2021-06-05 04:36:06,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 161 states have (on average 2.198757763975155) internal successors, (354), 161 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:06,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 354 transitions. [2021-06-05 04:36:06,110 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 354 transitions. Word has length 19 [2021-06-05 04:36:06,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:36:06,110 INFO L482 AbstractCegarLoop]: Abstraction has 162 states and 354 transitions. [2021-06-05 04:36:06,111 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 04:36:06,111 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 354 transitions. [2021-06-05 04:36:06,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:36:06,111 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:36:06,111 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:36:06,311 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1845,352 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:36:06,311 INFO L430 AbstractCegarLoop]: === Iteration 358 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:36:06,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:36:06,312 INFO L82 PathProgramCache]: Analyzing trace with hash 472306970, now seen corresponding path program 352 times [2021-06-05 04:36:06,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:36:06,312 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516493367] [2021-06-05 04:36:06,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:36:06,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:36:06,390 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:36:06,390 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:36:06,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516493367] [2021-06-05 04:36:06,391 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516493367] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:06,391 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1994702525] [2021-06-05 04:36:06,391 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 353 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 353 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:36:06,415 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:36:06,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:36:06,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 04:36:06,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:36:06,568 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:06,569 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:06,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:36:06,570 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:06,571 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:06,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:36:06,572 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:06,588 INFO L628 ElimStorePlain]: treesize reduction 36, result has 29.4 percent of original size [2021-06-05 04:36:06,588 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 04:36:06,589 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 04:36:06,589 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:63, output treesize:9 [2021-06-05 04:36:06,606 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 04:36:06,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1994702525] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:06,606 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:36:06,606 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 04:36:06,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899573286] [2021-06-05 04:36:06,606 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:36:06,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:36:06,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:36:06,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:36:06,606 INFO L87 Difference]: Start difference. First operand 162 states and 354 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:06,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:36:06,980 INFO L93 Difference]: Finished difference Result 208 states and 446 transitions. [2021-06-05 04:36:06,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:36:06,981 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:36:06,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:36:06,981 INFO L225 Difference]: With dead ends: 208 [2021-06-05 04:36:06,981 INFO L226 Difference]: Without dead ends: 208 [2021-06-05 04:36:06,981 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 429.2ms TimeCoverageRelationStatistics Valid=125, Invalid=687, Unknown=0, NotChecked=0, Total=812 [2021-06-05 04:36:06,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-06-05 04:36:06,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 163. [2021-06-05 04:36:06,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 162 states have (on average 2.197530864197531) internal successors, (356), 162 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:06,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 356 transitions. [2021-06-05 04:36:06,983 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 356 transitions. Word has length 19 [2021-06-05 04:36:06,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:36:06,983 INFO L482 AbstractCegarLoop]: Abstraction has 163 states and 356 transitions. [2021-06-05 04:36:06,983 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 04:36:06,983 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 356 transitions. [2021-06-05 04:36:06,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:36:06,983 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:36:06,983 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:36:07,183 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1847,353 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:36:07,184 INFO L430 AbstractCegarLoop]: === Iteration 359 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:36:07,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:36:07,184 INFO L82 PathProgramCache]: Analyzing trace with hash 112390452, now seen corresponding path program 353 times [2021-06-05 04:36:07,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:36:07,184 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071920968] [2021-06-05 04:36:07,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:36:07,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:36:07,263 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 04:36:07,263 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:36:07,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071920968] [2021-06-05 04:36:07,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071920968] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:07,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22391486] [2021-06-05 04:36:07,263 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 354 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 354 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:36:07,289 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:36:07,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:36:07,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:36:07,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:36:07,455 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 04:36:07,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [22391486] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:07,455 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:36:07,455 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:36:07,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318593124] [2021-06-05 04:36:07,455 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:36:07,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:36:07,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:36:07,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:36:07,455 INFO L87 Difference]: Start difference. First operand 163 states and 356 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:07,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:36:07,903 INFO L93 Difference]: Finished difference Result 224 states and 479 transitions. [2021-06-05 04:36:07,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:36:07,903 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 04:36:07,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:36:07,904 INFO L225 Difference]: With dead ends: 224 [2021-06-05 04:36:07,904 INFO L226 Difference]: Without dead ends: 224 [2021-06-05 04:36:07,904 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 440.2ms TimeCoverageRelationStatistics Valid=104, Invalid=598, Unknown=0, NotChecked=0, Total=702 [2021-06-05 04:36:07,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-06-05 04:36:07,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 164. [2021-06-05 04:36:07,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 2.196319018404908) internal successors, (358), 163 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:07,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 358 transitions. [2021-06-05 04:36:07,905 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 358 transitions. Word has length 19 [2021-06-05 04:36:07,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:36:07,906 INFO L482 AbstractCegarLoop]: Abstraction has 164 states and 358 transitions. [2021-06-05 04:36:07,906 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 04:36:07,906 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 358 transitions. [2021-06-05 04:36:07,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:36:07,906 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:36:07,906 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:36:08,106 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1849,354 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:36:08,106 INFO L430 AbstractCegarLoop]: === Iteration 360 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:36:08,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:36:08,107 INFO L82 PathProgramCache]: Analyzing trace with hash 822438222, now seen corresponding path program 354 times [2021-06-05 04:36:08,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:36:08,107 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377006551] [2021-06-05 04:36:08,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:36:08,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:36:08,205 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 04:36:08,205 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:36:08,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377006551] [2021-06-05 04:36:08,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377006551] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:08,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047240553] [2021-06-05 04:36:08,205 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 355 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 355 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:36:08,230 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:36:08,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:36:08,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 04:36:08,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:36:08,378 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:08,378 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:08,379 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 17 treesize of output 13 [2021-06-05 04:36:08,379 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:08,382 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:08,382 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 18 treesize of output 14 [2021-06-05 04:36:08,383 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:08,429 INFO L628 ElimStorePlain]: treesize reduction 74, result has 41.7 percent of original size [2021-06-05 04:36:08,432 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:08,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-06-05 04:36:08,433 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:36:08,449 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:36:08,451 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 9 treesize of output 7 [2021-06-05 04:36:08,452 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:08,467 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:36:08,467 INFO L518 ElimStorePlain]: Eliminatee v_prenex_320 vanished before elimination [2021-06-05 04:36:08,468 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 04:36:08,468 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:141, output treesize:22 [2021-06-05 04:36:08,511 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 04:36:08,511 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1047240553] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:08,511 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:36:08,511 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 04:36:08,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871951072] [2021-06-05 04:36:08,511 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:36:08,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:36:08,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:36:08,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:36:08,512 INFO L87 Difference]: Start difference. First operand 164 states and 358 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:08,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:36:08,770 INFO L93 Difference]: Finished difference Result 181 states and 392 transitions. [2021-06-05 04:36:08,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:36:08,771 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 04:36:08,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:36:08,771 INFO L225 Difference]: With dead ends: 181 [2021-06-05 04:36:08,771 INFO L226 Difference]: Without dead ends: 181 [2021-06-05 04:36:08,771 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 318.1ms TimeCoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:36:08,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-06-05 04:36:08,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 158. [2021-06-05 04:36:08,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 2.2038216560509554) internal successors, (346), 157 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:08,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 346 transitions. [2021-06-05 04:36:08,772 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 346 transitions. Word has length 19 [2021-06-05 04:36:08,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:36:08,773 INFO L482 AbstractCegarLoop]: Abstraction has 158 states and 346 transitions. [2021-06-05 04:36:08,773 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:08,773 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 346 transitions. [2021-06-05 04:36:08,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:36:08,773 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:36:08,773 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:36:08,973 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1859,355 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:36:08,973 INFO L430 AbstractCegarLoop]: === Iteration 361 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:36:08,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:36:08,974 INFO L82 PathProgramCache]: Analyzing trace with hash 330970698, now seen corresponding path program 355 times [2021-06-05 04:36:08,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:36:08,974 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843213286] [2021-06-05 04:36:08,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:36:08,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:36:09,051 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:36:09,051 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:36:09,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843213286] [2021-06-05 04:36:09,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843213286] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:09,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998157731] [2021-06-05 04:36:09,051 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 356 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 356 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:36:09,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:36:09,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 04:36:09,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:36:09,211 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:09,212 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:09,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:36:09,213 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:09,215 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:09,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:36:09,215 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:09,231 INFO L628 ElimStorePlain]: treesize reduction 36, result has 29.4 percent of original size [2021-06-05 04:36:09,231 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 04:36:09,232 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 04:36:09,232 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:63, output treesize:9 [2021-06-05 04:36:09,249 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 04:36:09,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1998157731] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:09,249 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:36:09,249 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 04:36:09,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210035891] [2021-06-05 04:36:09,249 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:36:09,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:36:09,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:36:09,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:36:09,256 INFO L87 Difference]: Start difference. First operand 158 states and 346 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:09,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:36:09,455 INFO L93 Difference]: Finished difference Result 190 states and 410 transitions. [2021-06-05 04:36:09,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:36:09,455 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:36:09,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:36:09,456 INFO L225 Difference]: With dead ends: 190 [2021-06-05 04:36:09,456 INFO L226 Difference]: Without dead ends: 190 [2021-06-05 04:36:09,456 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 173.3ms TimeCoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:36:09,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-06-05 04:36:09,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 158. [2021-06-05 04:36:09,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 2.2038216560509554) internal successors, (346), 157 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:09,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 346 transitions. [2021-06-05 04:36:09,457 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 346 transitions. Word has length 19 [2021-06-05 04:36:09,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:36:09,457 INFO L482 AbstractCegarLoop]: Abstraction has 158 states and 346 transitions. [2021-06-05 04:36:09,457 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:09,457 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 346 transitions. [2021-06-05 04:36:09,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:36:09,457 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:36:09,458 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:36:09,658 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1865,356 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:36:09,658 INFO L430 AbstractCegarLoop]: === Iteration 362 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:36:09,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:36:09,658 INFO L82 PathProgramCache]: Analyzing trace with hash -913808358, now seen corresponding path program 356 times [2021-06-05 04:36:09,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:36:09,658 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909883351] [2021-06-05 04:36:09,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:36:09,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:36:09,734 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:36:09,735 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:36:09,735 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909883351] [2021-06-05 04:36:09,735 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909883351] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:09,735 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [129352216] [2021-06-05 04:36:09,735 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 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 04:36:09,759 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:36:09,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:36:09,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 04:36:09,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:36:09,921 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:09,921 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:09,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:36:09,922 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:09,924 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:09,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:36:09,925 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:09,941 INFO L628 ElimStorePlain]: treesize reduction 36, result has 29.4 percent of original size [2021-06-05 04:36:09,941 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 04:36:09,942 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 04:36:09,942 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:63, output treesize:9 [2021-06-05 04:36:09,958 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 04:36:09,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [129352216] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:09,959 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:36:09,959 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 04:36:09,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355648525] [2021-06-05 04:36:09,959 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:36:09,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:36:09,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:36:09,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:36:09,959 INFO L87 Difference]: Start difference. First operand 158 states and 346 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:10,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:36:10,270 INFO L93 Difference]: Finished difference Result 209 states and 448 transitions. [2021-06-05 04:36:10,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:36:10,271 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:36:10,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:36:10,271 INFO L225 Difference]: With dead ends: 209 [2021-06-05 04:36:10,271 INFO L226 Difference]: Without dead ends: 209 [2021-06-05 04:36:10,271 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 371.9ms TimeCoverageRelationStatistics Valid=99, Invalid=603, Unknown=0, NotChecked=0, Total=702 [2021-06-05 04:36:10,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2021-06-05 04:36:10,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 159. [2021-06-05 04:36:10,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 2.2025316455696204) internal successors, (348), 158 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:10,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 348 transitions. [2021-06-05 04:36:10,272 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 348 transitions. Word has length 19 [2021-06-05 04:36:10,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:36:10,273 INFO L482 AbstractCegarLoop]: Abstraction has 159 states and 348 transitions. [2021-06-05 04:36:10,273 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 04:36:10,273 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 348 transitions. [2021-06-05 04:36:10,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:36:10,273 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:36:10,273 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:36:10,473 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 357 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1867 [2021-06-05 04:36:10,473 INFO L430 AbstractCegarLoop]: === Iteration 363 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:36:10,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:36:10,474 INFO L82 PathProgramCache]: Analyzing trace with hash -1923793846, now seen corresponding path program 357 times [2021-06-05 04:36:10,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:36:10,474 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013840954] [2021-06-05 04:36:10,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:36:10,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:36:10,549 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:36:10,549 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:36:10,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013840954] [2021-06-05 04:36:10,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013840954] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:10,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470643191] [2021-06-05 04:36:10,549 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 358 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 358 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:36:10,577 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 04:36:10,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:36:10,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 04:36:10,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:36:10,708 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:10,709 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:10,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:36:10,710 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:10,712 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:10,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:36:10,713 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:10,757 INFO L628 ElimStorePlain]: treesize reduction 74, result has 38.8 percent of original size [2021-06-05 04:36:10,757 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 04:36:10,759 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:10,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 04:36:10,759 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:10,775 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:36:10,777 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:10,777 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 12 treesize of output 8 [2021-06-05 04:36:10,778 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:36:10,793 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:36:10,794 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 04:36:10,794 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:133, output treesize:22 [2021-06-05 04:36:10,838 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 04:36:10,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1470643191] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:10,838 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:36:10,838 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 04:36:10,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582181392] [2021-06-05 04:36:10,838 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:36:10,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:36:10,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:36:10,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:36:10,839 INFO L87 Difference]: Start difference. First operand 159 states and 348 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:11,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:36:11,210 INFO L93 Difference]: Finished difference Result 223 states and 476 transitions. [2021-06-05 04:36:11,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:36:11,211 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:36:11,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:36:11,211 INFO L225 Difference]: With dead ends: 223 [2021-06-05 04:36:11,211 INFO L226 Difference]: Without dead ends: 223 [2021-06-05 04:36:11,211 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 378.1ms TimeCoverageRelationStatistics Valid=85, Invalid=565, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:36:11,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2021-06-05 04:36:11,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 160. [2021-06-05 04:36:11,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 2.20125786163522) internal successors, (350), 159 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:11,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 350 transitions. [2021-06-05 04:36:11,213 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 350 transitions. Word has length 19 [2021-06-05 04:36:11,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:36:11,213 INFO L482 AbstractCegarLoop]: Abstraction has 160 states and 350 transitions. [2021-06-05 04:36:11,213 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 04:36:11,213 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 350 transitions. [2021-06-05 04:36:11,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:36:11,213 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:36:11,213 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:36:11,413 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1869,358 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:36:11,414 INFO L430 AbstractCegarLoop]: === Iteration 364 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:36:11,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:36:11,414 INFO L82 PathProgramCache]: Analyzing trace with hash -563677106, now seen corresponding path program 358 times [2021-06-05 04:36:11,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:36:11,414 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046621696] [2021-06-05 04:36:11,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:36:11,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:36:11,504 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:36:11,504 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:36:11,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046621696] [2021-06-05 04:36:11,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046621696] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:11,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994672340] [2021-06-05 04:36:11,505 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 359 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 359 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:36:11,529 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:36:11,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:36:11,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:36:11,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:36:11,672 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:11,673 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:11,673 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 04:36:11,674 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:11,676 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:11,676 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 04:36:11,677 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:11,715 INFO L628 ElimStorePlain]: treesize reduction 68, result has 36.4 percent of original size [2021-06-05 04:36:11,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:36:11,717 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:11,730 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:36:11,730 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 04:36:11,730 INFO L518 ElimStorePlain]: Eliminatee v_prenex_326 vanished before elimination [2021-06-05 04:36:11,730 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 04:36:11,730 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-06-05 04:36:11,757 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:36:11,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [994672340] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:11,757 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:36:11,757 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:36:11,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336695014] [2021-06-05 04:36:11,757 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:36:11,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:36:11,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:36:11,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:36:11,758 INFO L87 Difference]: Start difference. First operand 160 states and 350 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:12,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:36:12,092 INFO L93 Difference]: Finished difference Result 183 states and 396 transitions. [2021-06-05 04:36:12,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:36:12,092 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 04:36:12,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:36:12,093 INFO L225 Difference]: With dead ends: 183 [2021-06-05 04:36:12,093 INFO L226 Difference]: Without dead ends: 183 [2021-06-05 04:36:12,093 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 352.0ms TimeCoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:36:12,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-06-05 04:36:12,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 157. [2021-06-05 04:36:12,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 2.2051282051282053) internal successors, (344), 156 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:12,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 344 transitions. [2021-06-05 04:36:12,094 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 344 transitions. Word has length 19 [2021-06-05 04:36:12,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:36:12,094 INFO L482 AbstractCegarLoop]: Abstraction has 157 states and 344 transitions. [2021-06-05 04:36:12,094 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 04:36:12,094 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 344 transitions. [2021-06-05 04:36:12,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:36:12,094 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:36:12,095 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:36:12,295 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 359 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1873 [2021-06-05 04:36:12,295 INFO L430 AbstractCegarLoop]: === Iteration 365 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:36:12,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:36:12,295 INFO L82 PathProgramCache]: Analyzing trace with hash -1799606638, now seen corresponding path program 359 times [2021-06-05 04:36:12,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:36:12,295 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227676717] [2021-06-05 04:36:12,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:36:12,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:36:12,390 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:36:12,390 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:36:12,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227676717] [2021-06-05 04:36:12,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227676717] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:12,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478033795] [2021-06-05 04:36:12,390 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 360 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 360 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:36:12,415 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:36:12,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:36:12,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:36:12,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:36:12,558 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 04:36:12,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [478033795] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:12,559 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:36:12,559 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 04:36:12,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429781578] [2021-06-05 04:36:12,559 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:36:12,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:36:12,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:36:12,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:36:12,559 INFO L87 Difference]: Start difference. First operand 157 states and 344 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:12,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:36:12,715 INFO L93 Difference]: Finished difference Result 193 states and 416 transitions. [2021-06-05 04:36:12,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:36:12,715 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:36:12,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:36:12,715 INFO L225 Difference]: With dead ends: 193 [2021-06-05 04:36:12,715 INFO L226 Difference]: Without dead ends: 193 [2021-06-05 04:36:12,716 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 226.4ms TimeCoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:36:12,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-06-05 04:36:12,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 157. [2021-06-05 04:36:12,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 2.2051282051282053) internal successors, (344), 156 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:12,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 344 transitions. [2021-06-05 04:36:12,717 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 344 transitions. Word has length 19 [2021-06-05 04:36:12,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:36:12,717 INFO L482 AbstractCegarLoop]: Abstraction has 157 states and 344 transitions. [2021-06-05 04:36:12,717 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 04:36:12,717 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 344 transitions. [2021-06-05 04:36:12,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:36:12,717 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:36:12,717 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:36:12,918 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1880,360 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:36:12,918 INFO L430 AbstractCegarLoop]: === Iteration 366 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:36:12,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:36:12,918 INFO L82 PathProgramCache]: Analyzing trace with hash 1485375170, now seen corresponding path program 360 times [2021-06-05 04:36:12,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:36:12,918 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703173930] [2021-06-05 04:36:12,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:36:12,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:36:12,995 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:36:12,995 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:36:12,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703173930] [2021-06-05 04:36:12,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703173930] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:12,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857621134] [2021-06-05 04:36:12,995 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 361 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 361 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:36:13,021 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 04:36:13,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:36:13,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:36:13,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:36:13,176 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 04:36:13,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [857621134] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:13,177 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:36:13,177 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 04:36:13,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728400266] [2021-06-05 04:36:13,177 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:36:13,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:36:13,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:36:13,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:36:13,177 INFO L87 Difference]: Start difference. First operand 157 states and 344 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:13,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:36:13,485 INFO L93 Difference]: Finished difference Result 218 states and 466 transitions. [2021-06-05 04:36:13,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:36:13,486 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:36:13,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:36:13,486 INFO L225 Difference]: With dead ends: 218 [2021-06-05 04:36:13,486 INFO L226 Difference]: Without dead ends: 218 [2021-06-05 04:36:13,486 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 325.8ms TimeCoverageRelationStatistics Valid=89, Invalid=561, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:36:13,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2021-06-05 04:36:13,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 158. [2021-06-05 04:36:13,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 2.2038216560509554) internal successors, (346), 157 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:13,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 346 transitions. [2021-06-05 04:36:13,488 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 346 transitions. Word has length 19 [2021-06-05 04:36:13,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:36:13,488 INFO L482 AbstractCegarLoop]: Abstraction has 158 states and 346 transitions. [2021-06-05 04:36:13,488 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 04:36:13,488 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 346 transitions. [2021-06-05 04:36:13,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:36:13,488 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:36:13,488 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:36:13,689 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 361 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1884 [2021-06-05 04:36:13,689 INFO L430 AbstractCegarLoop]: === Iteration 367 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:36:13,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:36:13,689 INFO L82 PathProgramCache]: Analyzing trace with hash -1449475386, now seen corresponding path program 361 times [2021-06-05 04:36:13,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:36:13,689 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764859915] [2021-06-05 04:36:13,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:36:13,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:36:13,771 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:36:13,771 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:36:13,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764859915] [2021-06-05 04:36:13,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764859915] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:13,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596837295] [2021-06-05 04:36:13,771 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 362 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 362 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:36:13,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:36:13,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:36:13,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:36:13,928 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:13,929 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:13,929 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 04:36:13,930 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:13,933 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:13,933 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 16 treesize of output 12 [2021-06-05 04:36:13,934 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:13,976 INFO L628 ElimStorePlain]: treesize reduction 68, result has 36.4 percent of original size [2021-06-05 04:36:13,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:36:13,979 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:13,991 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:36:13,991 INFO L518 ElimStorePlain]: Eliminatee v_prenex_329 vanished before elimination [2021-06-05 04:36:13,991 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 04:36:13,992 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 04:36:13,992 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-06-05 04:36:14,017 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:36:14,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [596837295] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:14,017 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:36:14,017 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:36:14,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54554391] [2021-06-05 04:36:14,017 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:36:14,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:36:14,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:36:14,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:36:14,018 INFO L87 Difference]: Start difference. First operand 158 states and 346 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:14,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:36:14,316 INFO L93 Difference]: Finished difference Result 180 states and 390 transitions. [2021-06-05 04:36:14,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:36:14,316 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 04:36:14,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:36:14,316 INFO L225 Difference]: With dead ends: 180 [2021-06-05 04:36:14,316 INFO L226 Difference]: Without dead ends: 180 [2021-06-05 04:36:14,316 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 313.2ms TimeCoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:36:14,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2021-06-05 04:36:14,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 156. [2021-06-05 04:36:14,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 2.206451612903226) internal successors, (342), 155 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:14,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 342 transitions. [2021-06-05 04:36:14,318 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 342 transitions. Word has length 19 [2021-06-05 04:36:14,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:36:14,318 INFO L482 AbstractCegarLoop]: Abstraction has 156 states and 342 transitions. [2021-06-05 04:36:14,318 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 04:36:14,318 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 342 transitions. [2021-06-05 04:36:14,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:36:14,318 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:36:14,318 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:36:14,518 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1894,362 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:36:14,519 INFO L430 AbstractCegarLoop]: === Iteration 368 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:36:14,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:36:14,519 INFO L82 PathProgramCache]: Analyzing trace with hash -397477482, now seen corresponding path program 362 times [2021-06-05 04:36:14,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:36:14,519 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280046934] [2021-06-05 04:36:14,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:36:14,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:36:14,593 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:36:14,594 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:36:14,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280046934] [2021-06-05 04:36:14,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280046934] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:14,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940083281] [2021-06-05 04:36:14,594 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 363 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 363 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:36:14,618 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:36:14,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:36:14,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 04:36:14,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:36:14,713 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:14,714 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:14,714 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 18 treesize of output 14 [2021-06-05 04:36:14,715 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:14,717 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:14,717 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:14,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:36:14,718 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:14,720 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:14,721 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:14,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 04:36:14,721 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:14,724 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:14,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:36:14,724 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:14,764 INFO L628 ElimStorePlain]: treesize reduction 69, result has 38.9 percent of original size [2021-06-05 04:36:14,766 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:14,766 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 9 treesize of output 5 [2021-06-05 04:36:14,767 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:36:14,784 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:36:14,784 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 04:36:14,784 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:141, output treesize:22 [2021-06-05 04:36:14,815 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:36:14,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [940083281] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:14,815 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:36:14,815 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:36:14,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384407027] [2021-06-05 04:36:14,816 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:36:14,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:36:14,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:36:14,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:36:14,816 INFO L87 Difference]: Start difference. First operand 156 states and 342 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:15,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:36:15,054 INFO L93 Difference]: Finished difference Result 210 states and 438 transitions. [2021-06-05 04:36:15,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:36:15,055 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 04:36:15,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:36:15,055 INFO L225 Difference]: With dead ends: 210 [2021-06-05 04:36:15,055 INFO L226 Difference]: Without dead ends: 207 [2021-06-05 04:36:15,055 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 246.3ms TimeCoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:36:15,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-06-05 04:36:15,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 161. [2021-06-05 04:36:15,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 2.20625) internal successors, (353), 160 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:15,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 353 transitions. [2021-06-05 04:36:15,057 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 353 transitions. Word has length 19 [2021-06-05 04:36:15,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:36:15,057 INFO L482 AbstractCegarLoop]: Abstraction has 161 states and 353 transitions. [2021-06-05 04:36:15,057 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 04:36:15,057 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 353 transitions. [2021-06-05 04:36:15,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:36:15,057 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:36:15,057 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:36:15,257 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1901,363 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:36:15,257 INFO L430 AbstractCegarLoop]: === Iteration 369 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:36:15,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:36:15,258 INFO L82 PathProgramCache]: Analyzing trace with hash -621408950, now seen corresponding path program 363 times [2021-06-05 04:36:15,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:36:15,258 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819332398] [2021-06-05 04:36:15,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:36:15,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:36:15,345 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:36:15,345 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:36:15,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819332398] [2021-06-05 04:36:15,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819332398] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:15,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706830576] [2021-06-05 04:36:15,345 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 364 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 364 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:36:15,371 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 04:36:15,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:36:15,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:36:15,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:36:15,515 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 04:36:15,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [706830576] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:15,515 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:36:15,515 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 04:36:15,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125787055] [2021-06-05 04:36:15,515 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:36:15,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:36:15,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:36:15,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:36:15,516 INFO L87 Difference]: Start difference. First operand 161 states and 353 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:15,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:36:15,796 INFO L93 Difference]: Finished difference Result 197 states and 416 transitions. [2021-06-05 04:36:15,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:36:15,796 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:36:15,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:36:15,796 INFO L225 Difference]: With dead ends: 197 [2021-06-05 04:36:15,796 INFO L226 Difference]: Without dead ends: 197 [2021-06-05 04:36:15,796 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 302.9ms TimeCoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:36:15,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-06-05 04:36:15,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 161. [2021-06-05 04:36:15,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 2.20625) internal successors, (353), 160 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:15,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 353 transitions. [2021-06-05 04:36:15,798 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 353 transitions. Word has length 19 [2021-06-05 04:36:15,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:36:15,798 INFO L482 AbstractCegarLoop]: Abstraction has 161 states and 353 transitions. [2021-06-05 04:36:15,798 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 04:36:15,798 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 353 transitions. [2021-06-05 04:36:15,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:36:15,798 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:36:15,798 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:36:15,998 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 364 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1905 [2021-06-05 04:36:15,999 INFO L430 AbstractCegarLoop]: === Iteration 370 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:36:15,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:36:15,999 INFO L82 PathProgramCache]: Analyzing trace with hash 738707790, now seen corresponding path program 364 times [2021-06-05 04:36:15,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:36:15,999 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14641746] [2021-06-05 04:36:15,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:36:16,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:36:16,076 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:36:16,076 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:36:16,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14641746] [2021-06-05 04:36:16,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14641746] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:16,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560447341] [2021-06-05 04:36:16,076 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 365 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 365 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:36:16,100 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:36:16,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:36:16,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:36:16,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:36:16,212 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:16,212 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:16,213 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 04:36:16,213 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:16,215 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:16,216 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:16,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:36:16,217 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:16,219 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:16,219 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:16,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:36:16,220 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:16,222 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:16,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:36:16,222 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:16,254 INFO L628 ElimStorePlain]: treesize reduction 53, result has 36.9 percent of original size [2021-06-05 04:36:16,254 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 04:36:16,255 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 04:36:16,255 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:121, output treesize:15 [2021-06-05 04:36:16,283 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:36:16,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1560447341] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:16,283 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:36:16,283 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:36:16,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628527357] [2021-06-05 04:36:16,284 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:36:16,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:36:16,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:36:16,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:36:16,284 INFO L87 Difference]: Start difference. First operand 161 states and 353 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:16,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:36:16,510 INFO L93 Difference]: Finished difference Result 216 states and 452 transitions. [2021-06-05 04:36:16,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:36:16,511 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 04:36:16,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:36:16,511 INFO L225 Difference]: With dead ends: 216 [2021-06-05 04:36:16,511 INFO L226 Difference]: Without dead ends: 216 [2021-06-05 04:36:16,511 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 245.4ms TimeCoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:36:16,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-06-05 04:36:16,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 160. [2021-06-05 04:36:16,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 2.207547169811321) internal successors, (351), 159 states have internal predecessors, (351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:16,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 351 transitions. [2021-06-05 04:36:16,513 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 351 transitions. Word has length 19 [2021-06-05 04:36:16,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:36:16,513 INFO L482 AbstractCegarLoop]: Abstraction has 160 states and 351 transitions. [2021-06-05 04:36:16,513 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 04:36:16,513 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 351 transitions. [2021-06-05 04:36:16,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:36:16,513 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:36:16,513 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:36:16,713 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1917,365 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:36:16,714 INFO L430 AbstractCegarLoop]: === Iteration 371 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:36:16,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:36:16,714 INFO L82 PathProgramCache]: Analyzing trace with hash -1494344204, now seen corresponding path program 365 times [2021-06-05 04:36:16,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:36:16,714 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567299225] [2021-06-05 04:36:16,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:36:16,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:36:16,801 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:36:16,801 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:36:16,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567299225] [2021-06-05 04:36:16,801 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567299225] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:16,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010780492] [2021-06-05 04:36:16,801 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 04:36:16,826 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:36:16,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:36:16,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:36:16,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:36:16,941 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 04:36:16,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2010780492] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:16,942 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:36:16,942 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:36:16,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828656851] [2021-06-05 04:36:16,942 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:36:16,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:36:16,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:36:16,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:36:16,942 INFO L87 Difference]: Start difference. First operand 160 states and 351 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:17,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:36:17,185 INFO L93 Difference]: Finished difference Result 170 states and 367 transitions. [2021-06-05 04:36:17,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:36:17,185 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 04:36:17,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:36:17,185 INFO L225 Difference]: With dead ends: 170 [2021-06-05 04:36:17,185 INFO L226 Difference]: Without dead ends: 166 [2021-06-05 04:36:17,186 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 269.3ms TimeCoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:36:17,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-06-05 04:36:17,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 160. [2021-06-05 04:36:17,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 2.20125786163522) internal successors, (350), 159 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:17,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 350 transitions. [2021-06-05 04:36:17,187 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 350 transitions. Word has length 19 [2021-06-05 04:36:17,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:36:17,187 INFO L482 AbstractCegarLoop]: Abstraction has 160 states and 350 transitions. [2021-06-05 04:36:17,187 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 04:36:17,187 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 350 transitions. [2021-06-05 04:36:17,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:36:17,187 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:36:17,187 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:36:17,387 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1927,366 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:36:17,388 INFO L430 AbstractCegarLoop]: === Iteration 372 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:36:17,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:36:17,388 INFO L82 PathProgramCache]: Analyzing trace with hash -1407462970, now seen corresponding path program 366 times [2021-06-05 04:36:17,388 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:36:17,388 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272962112] [2021-06-05 04:36:17,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:36:17,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:36:17,464 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:36:17,464 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:36:17,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272962112] [2021-06-05 04:36:17,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272962112] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:17,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124296665] [2021-06-05 04:36:17,464 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 367 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 367 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:36:17,490 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 04:36:17,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:36:17,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 04:36:17,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:36:17,593 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:17,593 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:17,593 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 17 treesize of output 13 [2021-06-05 04:36:17,594 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:17,596 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:17,596 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 17 treesize of output 13 [2021-06-05 04:36:17,597 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:17,615 INFO L628 ElimStorePlain]: treesize reduction 30, result has 43.4 percent of original size [2021-06-05 04:36:17,617 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:17,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-06-05 04:36:17,618 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:36:17,624 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:36:17,624 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 04:36:17,624 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:67, output treesize:9 [2021-06-05 04:36:17,642 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 04:36:17,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2124296665] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:17,642 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:36:17,642 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 04:36:17,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42137864] [2021-06-05 04:36:17,643 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:36:17,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:36:17,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:36:17,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:36:17,643 INFO L87 Difference]: Start difference. First operand 160 states and 350 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:17,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:36:17,825 INFO L93 Difference]: Finished difference Result 187 states and 402 transitions. [2021-06-05 04:36:17,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:36:17,826 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 04:36:17,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:36:17,826 INFO L225 Difference]: With dead ends: 187 [2021-06-05 04:36:17,826 INFO L226 Difference]: Without dead ends: 187 [2021-06-05 04:36:17,826 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 194.6ms TimeCoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:36:17,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-06-05 04:36:17,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 151. [2021-06-05 04:36:17,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 2.2) internal successors, (330), 150 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:17,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 330 transitions. [2021-06-05 04:36:17,827 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 330 transitions. Word has length 19 [2021-06-05 04:36:17,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:36:17,827 INFO L482 AbstractCegarLoop]: Abstraction has 151 states and 330 transitions. [2021-06-05 04:36:17,827 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 04:36:17,828 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 330 transitions. [2021-06-05 04:36:17,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:36:17,828 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:36:17,828 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:36:18,028 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1931,367 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:36:18,028 INFO L430 AbstractCegarLoop]: === Iteration 373 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:36:18,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:36:18,028 INFO L82 PathProgramCache]: Analyzing trace with hash -43204718, now seen corresponding path program 367 times [2021-06-05 04:36:18,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:36:18,029 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426579988] [2021-06-05 04:36:18,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:36:18,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:36:18,110 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:36:18,111 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:36:18,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426579988] [2021-06-05 04:36:18,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426579988] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:18,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351771044] [2021-06-05 04:36:18,111 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 368 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 368 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:36:18,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:36:18,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:36:18,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:36:18,282 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 04:36:18,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [351771044] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:18,282 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:36:18,283 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 04:36:18,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357935453] [2021-06-05 04:36:18,283 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:36:18,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:36:18,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:36:18,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:36:18,283 INFO L87 Difference]: Start difference. First operand 151 states and 330 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:18,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:36:18,403 INFO L93 Difference]: Finished difference Result 189 states and 406 transitions. [2021-06-05 04:36:18,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:36:18,403 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:36:18,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:36:18,403 INFO L225 Difference]: With dead ends: 189 [2021-06-05 04:36:18,403 INFO L226 Difference]: Without dead ends: 189 [2021-06-05 04:36:18,403 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 176.7ms TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:36:18,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-06-05 04:36:18,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 153. [2021-06-05 04:36:18,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 2.1973684210526314) internal successors, (334), 152 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:18,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 334 transitions. [2021-06-05 04:36:18,405 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 334 transitions. Word has length 19 [2021-06-05 04:36:18,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:36:18,405 INFO L482 AbstractCegarLoop]: Abstraction has 153 states and 334 transitions. [2021-06-05 04:36:18,405 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 04:36:18,405 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 334 transitions. [2021-06-05 04:36:18,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:36:18,405 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:36:18,405 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:36:18,606 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 368 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1932 [2021-06-05 04:36:18,606 INFO L430 AbstractCegarLoop]: === Iteration 374 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:36:18,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:36:18,606 INFO L82 PathProgramCache]: Analyzing trace with hash -403121236, now seen corresponding path program 368 times [2021-06-05 04:36:18,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:36:18,606 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161412673] [2021-06-05 04:36:18,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:36:18,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:36:18,687 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:36:18,687 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:36:18,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161412673] [2021-06-05 04:36:18,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161412673] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:18,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111873508] [2021-06-05 04:36:18,687 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 04:36:18,711 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:36:18,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:36:18,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 04:36:18,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:36:18,823 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:18,823 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:18,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:36:18,824 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:18,826 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:18,827 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 17 treesize of output 13 [2021-06-05 04:36:18,827 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:18,871 INFO L628 ElimStorePlain]: treesize reduction 78, result has 35.5 percent of original size [2021-06-05 04:36:18,871 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 04:36:18,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:36:18,874 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:18,889 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:36:18,889 INFO L518 ElimStorePlain]: Eliminatee v_prenex_332 vanished before elimination [2021-06-05 04:36:18,890 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 04:36:18,890 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:133, output treesize:22 [2021-06-05 04:36:18,932 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:36:18,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2111873508] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:18,932 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:36:18,932 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 04:36:18,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382717786] [2021-06-05 04:36:18,932 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:36:18,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:36:18,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:36:18,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:36:18,933 INFO L87 Difference]: Start difference. First operand 153 states and 334 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:19,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:36:19,044 INFO L93 Difference]: Finished difference Result 215 states and 458 transitions. [2021-06-05 04:36:19,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:36:19,044 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 04:36:19,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:36:19,044 INFO L225 Difference]: With dead ends: 215 [2021-06-05 04:36:19,044 INFO L226 Difference]: Without dead ends: 215 [2021-06-05 04:36:19,044 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 179.9ms TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:36:19,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2021-06-05 04:36:19,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 154. [2021-06-05 04:36:19,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 2.196078431372549) internal successors, (336), 153 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:19,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 336 transitions. [2021-06-05 04:36:19,046 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 336 transitions. Word has length 19 [2021-06-05 04:36:19,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:36:19,046 INFO L482 AbstractCegarLoop]: Abstraction has 154 states and 336 transitions. [2021-06-05 04:36:19,046 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 04:36:19,046 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 336 transitions. [2021-06-05 04:36:19,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:36:19,046 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:36:19,046 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:36:19,246 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1936,369 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:36:19,247 INFO L430 AbstractCegarLoop]: === Iteration 375 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:36:19,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:36:19,247 INFO L82 PathProgramCache]: Analyzing trace with hash 306926534, now seen corresponding path program 369 times [2021-06-05 04:36:19,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:36:19,247 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488951698] [2021-06-05 04:36:19,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:36:19,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:36:19,332 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:36:19,332 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:36:19,332 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488951698] [2021-06-05 04:36:19,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488951698] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:19,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42160514] [2021-06-05 04:36:19,333 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 370 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 370 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:36:19,358 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:36:19,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:36:19,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:36:19,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:36:19,482 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:19,483 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:19,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:36:19,484 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:19,486 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:19,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:36:19,487 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:19,524 INFO L628 ElimStorePlain]: treesize reduction 60, result has 38.8 percent of original size [2021-06-05 04:36:19,524 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 04:36:19,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index 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 04:36:19,526 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:19,539 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:36:19,539 INFO L518 ElimStorePlain]: Eliminatee v_prenex_335 vanished before elimination [2021-06-05 04:36:19,540 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 04:36:19,540 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-06-05 04:36:19,566 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:36:19,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [42160514] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:19,566 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:36:19,566 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:36:19,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614724643] [2021-06-05 04:36:19,566 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:36:19,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:36:19,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:36:19,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:36:19,567 INFO L87 Difference]: Start difference. First operand 154 states and 336 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:19,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:36:19,764 INFO L93 Difference]: Finished difference Result 174 states and 376 transitions. [2021-06-05 04:36:19,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:36:19,765 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 04:36:19,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:36:19,765 INFO L225 Difference]: With dead ends: 174 [2021-06-05 04:36:19,765 INFO L226 Difference]: Without dead ends: 174 [2021-06-05 04:36:19,765 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 229.6ms TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:36:19,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-06-05 04:36:19,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 152. [2021-06-05 04:36:19,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 2.198675496688742) internal successors, (332), 151 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:19,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 332 transitions. [2021-06-05 04:36:19,767 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 332 transitions. Word has length 19 [2021-06-05 04:36:19,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:36:19,767 INFO L482 AbstractCegarLoop]: Abstraction has 152 states and 332 transitions. [2021-06-05 04:36:19,767 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 04:36:19,768 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 332 transitions. [2021-06-05 04:36:19,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:36:19,768 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:36:19,768 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:36:19,990 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 370 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1940 [2021-06-05 04:36:19,990 INFO L430 AbstractCegarLoop]: === Iteration 376 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:36:19,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:36:19,990 INFO L82 PathProgramCache]: Analyzing trace with hash 1134992970, now seen corresponding path program 370 times [2021-06-05 04:36:19,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:36:19,990 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597185618] [2021-06-05 04:36:19,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:36:19,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:36:20,076 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:36:20,077 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:36:20,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597185618] [2021-06-05 04:36:20,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597185618] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:20,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009041425] [2021-06-05 04:36:20,077 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 371 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 371 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:36:20,101 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:36:20,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:36:20,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:36:20,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:36:20,239 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 04:36:20,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1009041425] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:20,239 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:36:20,239 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 04:36:20,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377762521] [2021-06-05 04:36:20,239 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:36:20,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:36:20,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:36:20,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:36:20,239 INFO L87 Difference]: Start difference. First operand 152 states and 332 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:20,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:36:20,473 INFO L93 Difference]: Finished difference Result 190 states and 400 transitions. [2021-06-05 04:36:20,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:36:20,473 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:36:20,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:36:20,474 INFO L225 Difference]: With dead ends: 190 [2021-06-05 04:36:20,474 INFO L226 Difference]: Without dead ends: 190 [2021-06-05 04:36:20,474 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 286.6ms TimeCoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:36:20,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-06-05 04:36:20,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 154. [2021-06-05 04:36:20,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 2.2026143790849675) internal successors, (337), 153 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:20,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 337 transitions. [2021-06-05 04:36:20,475 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 337 transitions. Word has length 19 [2021-06-05 04:36:20,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:36:20,476 INFO L482 AbstractCegarLoop]: Abstraction has 154 states and 337 transitions. [2021-06-05 04:36:20,476 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 04:36:20,476 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 337 transitions. [2021-06-05 04:36:20,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:36:20,476 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:36:20,476 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:36:20,676 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 371 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1947 [2021-06-05 04:36:20,676 INFO L430 AbstractCegarLoop]: === Iteration 377 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:36:20,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:36:20,677 INFO L82 PathProgramCache]: Analyzing trace with hash -1149788616, now seen corresponding path program 371 times [2021-06-05 04:36:20,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:36:20,677 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004956417] [2021-06-05 04:36:20,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:36:20,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:36:20,756 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:36:20,757 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:36:20,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004956417] [2021-06-05 04:36:20,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004956417] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:20,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [106280186] [2021-06-05 04:36:20,757 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 372 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 372 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:36:20,782 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:36:20,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:36:20,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:36:20,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:36:20,903 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:20,904 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:20,904 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 17 treesize of output 13 [2021-06-05 04:36:20,905 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:20,907 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:20,908 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:20,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:36:20,908 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:20,910 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:20,911 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:20,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:36:20,912 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:20,913 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:20,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:36:20,914 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:20,945 INFO L628 ElimStorePlain]: treesize reduction 53, result has 36.9 percent of original size [2021-06-05 04:36:20,946 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 04:36:20,946 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:36:20,946 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:121, output treesize:15 [2021-06-05 04:36:20,971 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 04:36:20,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [106280186] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:20,971 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:36:20,971 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:36:20,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538550705] [2021-06-05 04:36:20,972 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:36:20,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:36:20,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:36:20,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:36:20,972 INFO L87 Difference]: Start difference. First operand 154 states and 337 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:21,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:36:21,205 INFO L93 Difference]: Finished difference Result 221 states and 460 transitions. [2021-06-05 04:36:21,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:36:21,206 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 04:36:21,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:36:21,206 INFO L225 Difference]: With dead ends: 221 [2021-06-05 04:36:21,206 INFO L226 Difference]: Without dead ends: 221 [2021-06-05 04:36:21,206 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 281.0ms TimeCoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:36:21,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2021-06-05 04:36:21,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 155. [2021-06-05 04:36:21,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 2.220779220779221) internal successors, (342), 154 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:21,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 342 transitions. [2021-06-05 04:36:21,208 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 342 transitions. Word has length 19 [2021-06-05 04:36:21,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:36:21,208 INFO L482 AbstractCegarLoop]: Abstraction has 155 states and 342 transitions. [2021-06-05 04:36:21,208 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 04:36:21,208 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 342 transitions. [2021-06-05 04:36:21,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:36:21,208 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:36:21,208 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:36:21,408 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1957,372 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:36:21,408 INFO L430 AbstractCegarLoop]: === Iteration 378 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:36:21,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:36:21,409 INFO L82 PathProgramCache]: Analyzing trace with hash 262057716, now seen corresponding path program 372 times [2021-06-05 04:36:21,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:36:21,409 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244141400] [2021-06-05 04:36:21,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:36:21,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:36:21,514 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:36:21,515 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:36:21,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244141400] [2021-06-05 04:36:21,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244141400] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:21,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500168710] [2021-06-05 04:36:21,515 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 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 04:36:21,540 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:36:21,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:36:21,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:36:21,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:36:21,655 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:36:21,655 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [500168710] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:21,656 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:36:21,656 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:36:21,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856769921] [2021-06-05 04:36:21,656 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:36:21,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:36:21,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:36:21,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:36:21,656 INFO L87 Difference]: Start difference. First operand 155 states and 342 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:21,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:36:21,870 INFO L93 Difference]: Finished difference Result 164 states and 356 transitions. [2021-06-05 04:36:21,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:36:21,870 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 04:36:21,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:36:21,870 INFO L225 Difference]: With dead ends: 164 [2021-06-05 04:36:21,871 INFO L226 Difference]: Without dead ends: 160 [2021-06-05 04:36:21,871 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 287.8ms TimeCoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:36:21,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-06-05 04:36:21,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 155. [2021-06-05 04:36:21,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 2.2142857142857144) internal successors, (341), 154 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:21,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 341 transitions. [2021-06-05 04:36:21,872 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 341 transitions. Word has length 19 [2021-06-05 04:36:21,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:36:21,872 INFO L482 AbstractCegarLoop]: Abstraction has 155 states and 341 transitions. [2021-06-05 04:36:21,872 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 04:36:21,872 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 341 transitions. [2021-06-05 04:36:21,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:36:21,872 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:36:21,872 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:36:22,073 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 373 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1967 [2021-06-05 04:36:22,073 INFO L430 AbstractCegarLoop]: === Iteration 379 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:36:22,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:36:22,073 INFO L82 PathProgramCache]: Analyzing trace with hash 348938950, now seen corresponding path program 373 times [2021-06-05 04:36:22,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:36:22,074 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691615541] [2021-06-05 04:36:22,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:36:22,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:36:22,156 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:36:22,156 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:36:22,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691615541] [2021-06-05 04:36:22,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691615541] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:22,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37610531] [2021-06-05 04:36:22,156 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 374 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 374 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:36:22,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:36:22,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 04:36:22,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:36:22,283 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:22,283 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:22,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:36:22,284 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:22,286 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:22,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:36:22,287 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:22,305 INFO L628 ElimStorePlain]: treesize reduction 30, result has 43.4 percent of original size [2021-06-05 04:36:22,307 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:22,307 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 9 treesize of output 5 [2021-06-05 04:36:22,308 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:36:22,314 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:36:22,314 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 04:36:22,314 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:67, output treesize:9 [2021-06-05 04:36:22,332 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:36:22,332 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [37610531] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:22,332 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:36:22,332 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 04:36:22,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350507155] [2021-06-05 04:36:22,332 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:36:22,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:36:22,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:36:22,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:36:22,332 INFO L87 Difference]: Start difference. First operand 155 states and 341 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:22,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:36:22,509 INFO L93 Difference]: Finished difference Result 184 states and 396 transitions. [2021-06-05 04:36:22,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:36:22,509 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 04:36:22,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:36:22,509 INFO L225 Difference]: With dead ends: 184 [2021-06-05 04:36:22,510 INFO L226 Difference]: Without dead ends: 184 [2021-06-05 04:36:22,510 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 232.9ms TimeCoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:36:22,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-06-05 04:36:22,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 151. [2021-06-05 04:36:22,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 2.2) internal successors, (330), 150 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:22,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 330 transitions. [2021-06-05 04:36:22,511 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 330 transitions. Word has length 19 [2021-06-05 04:36:22,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:36:22,511 INFO L482 AbstractCegarLoop]: Abstraction has 151 states and 330 transitions. [2021-06-05 04:36:22,511 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 04:36:22,511 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 330 transitions. [2021-06-05 04:36:22,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:36:22,511 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:36:22,511 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:36:22,712 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 374 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1971 [2021-06-05 04:36:22,712 INFO L430 AbstractCegarLoop]: === Iteration 380 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:36:22,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:36:22,712 INFO L82 PathProgramCache]: Analyzing trace with hash 473126158, now seen corresponding path program 374 times [2021-06-05 04:36:22,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:36:22,712 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138698935] [2021-06-05 04:36:22,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:36:22,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:36:22,794 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:36:22,794 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:36:22,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138698935] [2021-06-05 04:36:22,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138698935] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:22,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966492789] [2021-06-05 04:36:22,794 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 04:36:22,822 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:36:22,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:36:22,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 04:36:22,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:36:22,934 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:22,935 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:22,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 04:36:22,935 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:22,938 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:22,938 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:22,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 04:36:22,939 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:22,941 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:22,941 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:22,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:36:22,942 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:22,944 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:22,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:36:22,945 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:22,985 INFO L628 ElimStorePlain]: treesize reduction 69, result has 38.9 percent of original size [2021-06-05 04:36:22,987 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:22,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-06-05 04:36:22,988 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:36:23,004 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:36:23,005 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:36:23,005 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:141, output treesize:22 [2021-06-05 04:36:23,036 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:36:23,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1966492789] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:23,037 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:36:23,037 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:36:23,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029436825] [2021-06-05 04:36:23,037 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:36:23,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:36:23,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:36:23,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:36:23,037 INFO L87 Difference]: Start difference. First operand 151 states and 330 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:23,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:36:23,448 INFO L93 Difference]: Finished difference Result 213 states and 445 transitions. [2021-06-05 04:36:23,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:36:23,448 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:36:23,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:36:23,448 INFO L225 Difference]: With dead ends: 213 [2021-06-05 04:36:23,448 INFO L226 Difference]: Without dead ends: 210 [2021-06-05 04:36:23,448 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 443.3ms TimeCoverageRelationStatistics Valid=106, Invalid=650, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:36:23,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2021-06-05 04:36:23,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 160. [2021-06-05 04:36:23,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 2.2264150943396226) internal successors, (354), 159 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:23,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 354 transitions. [2021-06-05 04:36:23,450 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 354 transitions. Word has length 19 [2021-06-05 04:36:23,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:36:23,450 INFO L482 AbstractCegarLoop]: Abstraction has 160 states and 354 transitions. [2021-06-05 04:36:23,450 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:23,450 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 354 transitions. [2021-06-05 04:36:23,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:36:23,450 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:36:23,450 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:36:23,650 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1972,375 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:36:23,651 INFO L430 AbstractCegarLoop]: === Iteration 381 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:36:23,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:36:23,651 INFO L82 PathProgramCache]: Analyzing trace with hash 249194690, now seen corresponding path program 375 times [2021-06-05 04:36:23,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:36:23,651 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424534857] [2021-06-05 04:36:23,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:36:23,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:36:23,740 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:36:23,740 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:36:23,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424534857] [2021-06-05 04:36:23,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424534857] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:23,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901161420] [2021-06-05 04:36:23,740 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 376 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 376 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:36:23,766 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:36:23,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:36:23,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:36:23,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:36:23,949 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 04:36:23,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1901161420] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:23,949 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:36:23,949 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 04:36:23,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720875857] [2021-06-05 04:36:23,949 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:36:23,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:36:23,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:36:23,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:36:23,950 INFO L87 Difference]: Start difference. First operand 160 states and 354 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:24,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:36:24,308 INFO L93 Difference]: Finished difference Result 197 states and 418 transitions. [2021-06-05 04:36:24,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:36:24,309 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:36:24,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:36:24,309 INFO L225 Difference]: With dead ends: 197 [2021-06-05 04:36:24,309 INFO L226 Difference]: Without dead ends: 197 [2021-06-05 04:36:24,309 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 389.3ms TimeCoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:36:24,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-06-05 04:36:24,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 160. [2021-06-05 04:36:24,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 2.2264150943396226) internal successors, (354), 159 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:24,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 354 transitions. [2021-06-05 04:36:24,310 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 354 transitions. Word has length 19 [2021-06-05 04:36:24,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:36:24,310 INFO L482 AbstractCegarLoop]: Abstraction has 160 states and 354 transitions. [2021-06-05 04:36:24,311 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 04:36:24,311 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 354 transitions. [2021-06-05 04:36:24,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:36:24,311 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:36:24,311 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:36:24,511 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 376 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1976 [2021-06-05 04:36:24,511 INFO L430 AbstractCegarLoop]: === Iteration 382 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:36:24,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:36:24,512 INFO L82 PathProgramCache]: Analyzing trace with hash -1161596142, now seen corresponding path program 376 times [2021-06-05 04:36:24,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:36:24,512 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839417818] [2021-06-05 04:36:24,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:36:24,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:36:24,609 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 04:36:24,609 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:36:24,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839417818] [2021-06-05 04:36:24,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839417818] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:24,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036081979] [2021-06-05 04:36:24,609 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 04:36:24,633 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:36:24,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:36:24,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:36:24,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:36:24,777 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:36:24,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2036081979] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:24,777 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:36:24,777 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:36:24,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164359775] [2021-06-05 04:36:24,777 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:36:24,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:36:24,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:36:24,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:36:24,778 INFO L87 Difference]: Start difference. First operand 160 states and 354 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:25,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:36:25,236 INFO L93 Difference]: Finished difference Result 199 states and 419 transitions. [2021-06-05 04:36:25,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:36:25,237 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 04:36:25,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:36:25,237 INFO L225 Difference]: With dead ends: 199 [2021-06-05 04:36:25,237 INFO L226 Difference]: Without dead ends: 197 [2021-06-05 04:36:25,237 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 447.0ms TimeCoverageRelationStatistics Valid=84, Invalid=566, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:36:25,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-06-05 04:36:25,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 160. [2021-06-05 04:36:25,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 2.220125786163522) internal successors, (353), 159 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:25,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 353 transitions. [2021-06-05 04:36:25,239 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 353 transitions. Word has length 19 [2021-06-05 04:36:25,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:36:25,239 INFO L482 AbstractCegarLoop]: Abstraction has 160 states and 353 transitions. [2021-06-05 04:36:25,239 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 04:36:25,239 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 353 transitions. [2021-06-05 04:36:25,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:36:25,239 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:36:25,239 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:36:25,439 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1986,377 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:36:25,439 INFO L430 AbstractCegarLoop]: === Iteration 383 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:36:25,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:36:25,440 INFO L82 PathProgramCache]: Analyzing trace with hash 1609311430, now seen corresponding path program 377 times [2021-06-05 04:36:25,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:36:25,440 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796266778] [2021-06-05 04:36:25,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:36:25,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:36:25,523 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:36:25,523 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:36:25,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796266778] [2021-06-05 04:36:25,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796266778] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:25,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835268905] [2021-06-05 04:36:25,524 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 04:36:25,548 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:36:25,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:36:25,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:36:25,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:36:25,675 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:25,675 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:25,676 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 04:36:25,676 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:25,678 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:25,679 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:25,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:36:25,679 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:25,681 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:25,682 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:25,682 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 16 treesize of output 12 [2021-06-05 04:36:25,683 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:25,685 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:25,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:36:25,686 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:25,717 INFO L628 ElimStorePlain]: treesize reduction 53, result has 36.9 percent of original size [2021-06-05 04:36:25,717 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 04:36:25,718 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 04:36:25,718 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:121, output treesize:15 [2021-06-05 04:36:25,743 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:36:25,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1835268905] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:25,743 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:36:25,743 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:36:25,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149437862] [2021-06-05 04:36:25,744 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:36:25,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:36:25,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:36:25,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:36:25,744 INFO L87 Difference]: Start difference. First operand 160 states and 353 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:26,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:36:26,158 INFO L93 Difference]: Finished difference Result 224 states and 468 transitions. [2021-06-05 04:36:26,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:36:26,158 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:36:26,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:36:26,158 INFO L225 Difference]: With dead ends: 224 [2021-06-05 04:36:26,158 INFO L226 Difference]: Without dead ends: 224 [2021-06-05 04:36:26,158 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 420.6ms TimeCoverageRelationStatistics Valid=107, Invalid=595, Unknown=0, NotChecked=0, Total=702 [2021-06-05 04:36:26,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-06-05 04:36:26,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 159. [2021-06-05 04:36:26,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 2.221518987341772) internal successors, (351), 158 states have internal predecessors, (351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:26,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 351 transitions. [2021-06-05 04:36:26,160 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 351 transitions. Word has length 19 [2021-06-05 04:36:26,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:36:26,160 INFO L482 AbstractCegarLoop]: Abstraction has 159 states and 351 transitions. [2021-06-05 04:36:26,160 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:26,161 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 351 transitions. [2021-06-05 04:36:26,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:36:26,161 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:36:26,161 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:36:26,364 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 378 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1996 [2021-06-05 04:36:26,365 INFO L430 AbstractCegarLoop]: === Iteration 384 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:36:26,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:36:26,368 INFO L82 PathProgramCache]: Analyzing trace with hash -623740564, now seen corresponding path program 378 times [2021-06-05 04:36:26,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:36:26,369 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908496559] [2021-06-05 04:36:26,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:36:26,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:36:26,465 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:36:26,465 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:36:26,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908496559] [2021-06-05 04:36:26,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908496559] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:26,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148463771] [2021-06-05 04:36:26,465 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 379 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 379 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:36:26,491 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:36:26,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:36:26,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 04:36:26,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:36:26,626 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:36:26,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1148463771] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:26,626 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:36:26,626 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:36:26,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514062651] [2021-06-05 04:36:26,626 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:36:26,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:36:26,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:36:26,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:36:26,627 INFO L87 Difference]: Start difference. First operand 159 states and 351 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:26,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:36:26,897 INFO L93 Difference]: Finished difference Result 170 states and 367 transitions. [2021-06-05 04:36:26,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:36:26,898 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 04:36:26,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:36:26,899 INFO L225 Difference]: With dead ends: 170 [2021-06-05 04:36:26,899 INFO L226 Difference]: Without dead ends: 166 [2021-06-05 04:36:26,899 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 323.7ms TimeCoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:36:26,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-06-05 04:36:26,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 159. [2021-06-05 04:36:26,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 2.2151898734177213) internal successors, (350), 158 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:26,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 350 transitions. [2021-06-05 04:36:26,901 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 350 transitions. Word has length 19 [2021-06-05 04:36:26,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:36:26,901 INFO L482 AbstractCegarLoop]: Abstraction has 159 states and 350 transitions. [2021-06-05 04:36:26,901 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:26,901 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 350 transitions. [2021-06-05 04:36:26,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:36:26,901 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:36:26,901 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:36:27,104 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2008,379 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:36:27,105 INFO L430 AbstractCegarLoop]: === Iteration 385 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:36:27,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:36:27,105 INFO L82 PathProgramCache]: Analyzing trace with hash -536859330, now seen corresponding path program 379 times [2021-06-05 04:36:27,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:36:27,105 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262824618] [2021-06-05 04:36:27,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:36:27,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:36:27,205 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 04:36:27,205 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:36:27,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262824618] [2021-06-05 04:36:27,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262824618] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:27,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552165069] [2021-06-05 04:36:27,205 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 380 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 380 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:36:27,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:36:27,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 04:36:27,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:36:27,344 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:27,345 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:27,345 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 17 treesize of output 13 [2021-06-05 04:36:27,346 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:27,347 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:27,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:36:27,348 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:27,366 INFO L628 ElimStorePlain]: treesize reduction 36, result has 32.1 percent of original size [2021-06-05 04:36:27,366 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 04:36:27,366 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 04:36:27,366 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:67, output treesize:9 [2021-06-05 04:36:27,385 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 04:36:27,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [552165069] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:27,385 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:36:27,385 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 04:36:27,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346433715] [2021-06-05 04:36:27,385 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:36:27,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:36:27,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:36:27,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:36:27,386 INFO L87 Difference]: Start difference. First operand 159 states and 350 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:27,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:36:27,738 INFO L93 Difference]: Finished difference Result 196 states and 419 transitions. [2021-06-05 04:36:27,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:36:27,739 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 04:36:27,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:36:27,739 INFO L225 Difference]: With dead ends: 196 [2021-06-05 04:36:27,739 INFO L226 Difference]: Without dead ends: 196 [2021-06-05 04:36:27,739 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 431.0ms TimeCoverageRelationStatistics Valid=128, Invalid=684, Unknown=0, NotChecked=0, Total=812 [2021-06-05 04:36:27,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-06-05 04:36:27,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 158. [2021-06-05 04:36:27,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 2.21656050955414) internal successors, (348), 157 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:27,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 348 transitions. [2021-06-05 04:36:27,741 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 348 transitions. Word has length 19 [2021-06-05 04:36:27,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:36:27,741 INFO L482 AbstractCegarLoop]: Abstraction has 158 states and 348 transitions. [2021-06-05 04:36:27,741 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 04:36:27,741 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 348 transitions. [2021-06-05 04:36:27,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:36:27,741 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:36:27,741 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:36:27,941 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 380 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2012 [2021-06-05 04:36:27,942 INFO L430 AbstractCegarLoop]: === Iteration 386 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:36:27,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:36:27,942 INFO L82 PathProgramCache]: Analyzing trace with hash -1130086830, now seen corresponding path program 380 times [2021-06-05 04:36:27,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:36:27,942 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025999098] [2021-06-05 04:36:27,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:36:27,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:36:28,019 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:36:28,019 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:36:28,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025999098] [2021-06-05 04:36:28,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025999098] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:28,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141211659] [2021-06-05 04:36:28,019 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 381 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 381 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:36:28,044 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:36:28,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:36:28,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 04:36:28,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:36:28,166 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 04:36:28,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1141211659] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:28,166 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:36:28,167 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:36:28,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3698564] [2021-06-05 04:36:28,167 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:36:28,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:36:28,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:36:28,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:36:28,167 INFO L87 Difference]: Start difference. First operand 158 states and 348 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:28,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:36:28,297 INFO L93 Difference]: Finished difference Result 167 states and 361 transitions. [2021-06-05 04:36:28,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:36:28,297 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 04:36:28,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:36:28,297 INFO L225 Difference]: With dead ends: 167 [2021-06-05 04:36:28,297 INFO L226 Difference]: Without dead ends: 161 [2021-06-05 04:36:28,297 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 212.4ms TimeCoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:36:28,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-06-05 04:36:28,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 158. [2021-06-05 04:36:28,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 2.210191082802548) internal successors, (347), 157 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:28,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 347 transitions. [2021-06-05 04:36:28,299 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 347 transitions. Word has length 19 [2021-06-05 04:36:28,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:36:28,299 INFO L482 AbstractCegarLoop]: Abstraction has 158 states and 347 transitions. [2021-06-05 04:36:28,299 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 04:36:28,299 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 347 transitions. [2021-06-05 04:36:28,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:36:28,302 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:36:28,302 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:36:28,502 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 381 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2013 [2021-06-05 04:36:28,502 INFO L430 AbstractCegarLoop]: === Iteration 387 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:36:28,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:36:28,503 INFO L82 PathProgramCache]: Analyzing trace with hash 1651323846, now seen corresponding path program 381 times [2021-06-05 04:36:28,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:36:28,503 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704938311] [2021-06-05 04:36:28,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:36:28,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:36:28,578 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:36:28,578 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:36:28,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704938311] [2021-06-05 04:36:28,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704938311] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:28,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1837350022] [2021-06-05 04:36:28,578 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 382 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 382 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:36:28,603 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:36:28,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:36:28,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 04:36:28,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:36:28,710 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:28,711 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:28,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:36:28,712 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:28,713 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:28,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:36:28,714 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:28,732 INFO L628 ElimStorePlain]: treesize reduction 30, result has 43.4 percent of original size [2021-06-05 04:36:28,734 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:28,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-06-05 04:36:28,735 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:36:28,741 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:36:28,741 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 04:36:28,741 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:67, output treesize:9 [2021-06-05 04:36:28,760 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 04:36:28,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1837350022] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:28,760 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:36:28,760 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 04:36:28,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591976072] [2021-06-05 04:36:28,760 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:36:28,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:36:28,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:36:28,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:36:28,760 INFO L87 Difference]: Start difference. First operand 158 states and 347 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:28,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:36:28,949 INFO L93 Difference]: Finished difference Result 184 states and 395 transitions. [2021-06-05 04:36:28,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:36:28,949 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 04:36:28,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:36:28,949 INFO L225 Difference]: With dead ends: 184 [2021-06-05 04:36:28,949 INFO L226 Difference]: Without dead ends: 184 [2021-06-05 04:36:28,949 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 198.0ms TimeCoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:36:28,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-06-05 04:36:28,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 150. [2021-06-05 04:36:28,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 2.2013422818791946) internal successors, (328), 149 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:28,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 328 transitions. [2021-06-05 04:36:28,951 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 328 transitions. Word has length 19 [2021-06-05 04:36:28,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:36:28,951 INFO L482 AbstractCegarLoop]: Abstraction has 150 states and 328 transitions. [2021-06-05 04:36:28,951 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 04:36:28,951 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 328 transitions. [2021-06-05 04:36:28,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:36:28,951 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:36:28,951 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:36:29,151 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2017,382 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:36:29,152 INFO L430 AbstractCegarLoop]: === Iteration 388 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:36:29,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:36:29,152 INFO L82 PathProgramCache]: Analyzing trace with hash -1440748214, now seen corresponding path program 382 times [2021-06-05 04:36:29,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:36:29,152 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888262414] [2021-06-05 04:36:29,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:36:29,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:36:29,250 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 04:36:29,251 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:36:29,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888262414] [2021-06-05 04:36:29,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888262414] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:29,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1197431650] [2021-06-05 04:36:29,251 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 04:36:29,278 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:36:29,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:36:29,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:36:29,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:36:29,446 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:36:29,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1197431650] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:29,447 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:36:29,447 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 04:36:29,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493779082] [2021-06-05 04:36:29,447 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:36:29,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:36:29,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:36:29,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:36:29,447 INFO L87 Difference]: Start difference. First operand 150 states and 328 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:29,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:36:29,846 INFO L93 Difference]: Finished difference Result 193 states and 405 transitions. [2021-06-05 04:36:29,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:36:29,847 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:36:29,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:36:29,847 INFO L225 Difference]: With dead ends: 193 [2021-06-05 04:36:29,847 INFO L226 Difference]: Without dead ends: 193 [2021-06-05 04:36:29,847 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 431.4ms TimeCoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:36:29,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-06-05 04:36:29,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 153. [2021-06-05 04:36:29,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 2.210526315789474) internal successors, (336), 152 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:29,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 336 transitions. [2021-06-05 04:36:29,848 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 336 transitions. Word has length 19 [2021-06-05 04:36:29,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:36:29,848 INFO L482 AbstractCegarLoop]: Abstraction has 153 states and 336 transitions. [2021-06-05 04:36:29,848 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 04:36:29,848 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 336 transitions. [2021-06-05 04:36:29,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:36:29,849 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:36:29,849 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:36:30,049 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 383 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2018 [2021-06-05 04:36:30,049 INFO L430 AbstractCegarLoop]: === Iteration 389 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:36:30,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:36:30,049 INFO L82 PathProgramCache]: Analyzing trace with hash -80631474, now seen corresponding path program 383 times [2021-06-05 04:36:30,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:36:30,050 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157690316] [2021-06-05 04:36:30,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:36:30,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:36:30,129 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:36:30,129 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:36:30,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157690316] [2021-06-05 04:36:30,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157690316] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:30,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558642383] [2021-06-05 04:36:30,129 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 384 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 384 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:36:30,165 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:36:30,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:36:30,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:36:30,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:36:30,302 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:30,302 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:30,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:36:30,303 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:30,305 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:30,305 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:30,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:36:30,306 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:30,308 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:30,309 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:30,309 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 17 treesize of output 13 [2021-06-05 04:36:30,310 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:30,311 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:30,312 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 16 treesize of output 12 [2021-06-05 04:36:30,312 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:30,343 INFO L628 ElimStorePlain]: treesize reduction 53, result has 36.9 percent of original size [2021-06-05 04:36:30,343 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 04:36:30,344 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 04:36:30,344 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:121, output treesize:15 [2021-06-05 04:36:30,369 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 04:36:30,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [558642383] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:30,369 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:36:30,369 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:36:30,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355641007] [2021-06-05 04:36:30,369 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:36:30,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:36:30,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:36:30,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:36:30,370 INFO L87 Difference]: Start difference. First operand 153 states and 336 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:30,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:36:30,970 INFO L93 Difference]: Finished difference Result 229 states and 475 transitions. [2021-06-05 04:36:30,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:36:30,970 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 04:36:30,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:36:30,970 INFO L225 Difference]: With dead ends: 229 [2021-06-05 04:36:30,970 INFO L226 Difference]: Without dead ends: 229 [2021-06-05 04:36:30,971 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 577.0ms TimeCoverageRelationStatistics Valid=131, Invalid=739, Unknown=0, NotChecked=0, Total=870 [2021-06-05 04:36:30,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2021-06-05 04:36:30,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 156. [2021-06-05 04:36:30,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 2.238709677419355) internal successors, (347), 155 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:30,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 347 transitions. [2021-06-05 04:36:30,972 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 347 transitions. Word has length 19 [2021-06-05 04:36:30,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:36:30,972 INFO L482 AbstractCegarLoop]: Abstraction has 156 states and 347 transitions. [2021-06-05 04:36:30,972 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 04:36:30,972 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 347 transitions. [2021-06-05 04:36:30,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:36:30,972 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:36:30,972 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:36:31,173 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 384 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2028 [2021-06-05 04:36:31,173 INFO L430 AbstractCegarLoop]: === Iteration 390 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:36:31,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:36:31,173 INFO L82 PathProgramCache]: Analyzing trace with hash 1981283828, now seen corresponding path program 384 times [2021-06-05 04:36:31,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:36:31,173 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909972551] [2021-06-05 04:36:31,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:36:31,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:36:31,282 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 04:36:31,282 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:36:31,282 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909972551] [2021-06-05 04:36:31,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909972551] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:31,282 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091082392] [2021-06-05 04:36:31,282 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 385 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 385 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:36:31,307 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:36:31,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:36:31,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 04:36:31,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:36:31,465 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:36:31,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1091082392] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:31,465 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:36:31,465 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:36:31,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134259673] [2021-06-05 04:36:31,465 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:36:31,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:36:31,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:36:31,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:36:31,466 INFO L87 Difference]: Start difference. First operand 156 states and 347 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:31,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:36:31,682 INFO L93 Difference]: Finished difference Result 170 states and 368 transitions. [2021-06-05 04:36:31,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:36:31,683 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 04:36:31,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:36:31,683 INFO L225 Difference]: With dead ends: 170 [2021-06-05 04:36:31,683 INFO L226 Difference]: Without dead ends: 166 [2021-06-05 04:36:31,683 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 318.0ms TimeCoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:36:31,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-06-05 04:36:31,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 156. [2021-06-05 04:36:31,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 2.232258064516129) internal successors, (346), 155 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:31,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 346 transitions. [2021-06-05 04:36:31,684 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 346 transitions. Word has length 19 [2021-06-05 04:36:31,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:36:31,685 INFO L482 AbstractCegarLoop]: Abstraction has 156 states and 346 transitions. [2021-06-05 04:36:31,685 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 04:36:31,685 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 346 transitions. [2021-06-05 04:36:31,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:36:31,685 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:36:31,685 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:36:31,885 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2040,385 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:36:31,885 INFO L430 AbstractCegarLoop]: === Iteration 391 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:36:31,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:36:31,885 INFO L82 PathProgramCache]: Analyzing trace with hash 2068165062, now seen corresponding path program 385 times [2021-06-05 04:36:31,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:36:31,886 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722646020] [2021-06-05 04:36:31,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:36:31,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:36:31,966 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:36:31,967 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:36:31,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722646020] [2021-06-05 04:36:31,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722646020] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:31,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355710715] [2021-06-05 04:36:31,967 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 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 04:36:31,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:36:31,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 04:36:31,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:36:32,117 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:32,117 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:32,117 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 17 treesize of output 13 [2021-06-05 04:36:32,118 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:32,120 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:32,120 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 17 treesize of output 13 [2021-06-05 04:36:32,121 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:32,138 INFO L628 ElimStorePlain]: treesize reduction 36, result has 32.1 percent of original size [2021-06-05 04:36:32,138 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 04:36:32,138 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 04:36:32,139 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:67, output treesize:9 [2021-06-05 04:36:32,157 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:36:32,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1355710715] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:32,157 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:36:32,157 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 04:36:32,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987047797] [2021-06-05 04:36:32,157 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:36:32,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:36:32,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:36:32,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:36:32,158 INFO L87 Difference]: Start difference. First operand 156 states and 346 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:32,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:36:32,596 INFO L93 Difference]: Finished difference Result 201 states and 430 transitions. [2021-06-05 04:36:32,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:36:32,597 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 04:36:32,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:36:32,597 INFO L225 Difference]: With dead ends: 201 [2021-06-05 04:36:32,597 INFO L226 Difference]: Without dead ends: 201 [2021-06-05 04:36:32,597 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 450.1ms TimeCoverageRelationStatistics Valid=117, Invalid=639, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:36:32,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2021-06-05 04:36:32,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 155. [2021-06-05 04:36:32,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 2.2337662337662336) internal successors, (344), 154 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:32,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 344 transitions. [2021-06-05 04:36:32,598 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 344 transitions. Word has length 19 [2021-06-05 04:36:32,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:36:32,599 INFO L482 AbstractCegarLoop]: Abstraction has 155 states and 344 transitions. [2021-06-05 04:36:32,599 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 04:36:32,599 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 344 transitions. [2021-06-05 04:36:32,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:36:32,599 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:36:32,599 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:36:32,799 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2044,386 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:36:32,799 INFO L430 AbstractCegarLoop]: === Iteration 392 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:36:32,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:36:32,799 INFO L82 PathProgramCache]: Analyzing trace with hash 1474937562, now seen corresponding path program 386 times [2021-06-05 04:36:32,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:36:32,800 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137118925] [2021-06-05 04:36:32,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:36:32,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:36:32,902 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:36:32,903 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:36:32,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137118925] [2021-06-05 04:36:32,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137118925] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:32,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602127750] [2021-06-05 04:36:32,903 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 387 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 387 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:36:32,927 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:36:32,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:36:32,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 04:36:32,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:36:33,068 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 04:36:33,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [602127750] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:33,068 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:36:33,068 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:36:33,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460892528] [2021-06-05 04:36:33,069 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:36:33,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:36:33,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:36:33,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:36:33,069 INFO L87 Difference]: Start difference. First operand 155 states and 344 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:33,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:36:33,274 INFO L93 Difference]: Finished difference Result 168 states and 363 transitions. [2021-06-05 04:36:33,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:36:33,274 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 04:36:33,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:36:33,275 INFO L225 Difference]: With dead ends: 168 [2021-06-05 04:36:33,275 INFO L226 Difference]: Without dead ends: 162 [2021-06-05 04:36:33,275 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 283.5ms TimeCoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:36:33,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-06-05 04:36:33,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 155. [2021-06-05 04:36:33,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 2.227272727272727) internal successors, (343), 154 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:33,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 343 transitions. [2021-06-05 04:36:33,276 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 343 transitions. Word has length 19 [2021-06-05 04:36:33,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:36:33,276 INFO L482 AbstractCegarLoop]: Abstraction has 155 states and 343 transitions. [2021-06-05 04:36:33,276 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 04:36:33,276 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 343 transitions. [2021-06-05 04:36:33,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:36:33,276 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:36:33,276 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:36:33,477 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 387 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2045 [2021-06-05 04:36:33,477 INFO L430 AbstractCegarLoop]: === Iteration 393 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:36:33,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:36:33,477 INFO L82 PathProgramCache]: Analyzing trace with hash -38619058, now seen corresponding path program 387 times [2021-06-05 04:36:33,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:36:33,477 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890571048] [2021-06-05 04:36:33,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:36:33,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:36:33,556 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:36:33,556 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:36:33,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890571048] [2021-06-05 04:36:33,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890571048] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:33,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567871575] [2021-06-05 04:36:33,557 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 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 04:36:33,582 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:36:33,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:36:33,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 04:36:33,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:36:33,701 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:33,702 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:33,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:36:33,703 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:33,705 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:33,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:36:33,705 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:33,724 INFO L628 ElimStorePlain]: treesize reduction 30, result has 43.4 percent of original size [2021-06-05 04:36:33,725 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:33,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-06-05 04:36:33,727 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:36:33,732 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:36:33,732 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:36:33,733 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:67, output treesize:9 [2021-06-05 04:36:33,751 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:36:33,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [567871575] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:33,751 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:36:33,751 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 04:36:33,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210333608] [2021-06-05 04:36:33,752 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:36:33,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:36:33,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:36:33,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:36:33,752 INFO L87 Difference]: Start difference. First operand 155 states and 343 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:34,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:36:34,086 INFO L93 Difference]: Finished difference Result 194 states and 417 transitions. [2021-06-05 04:36:34,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:36:34,086 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 04:36:34,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:36:34,087 INFO L225 Difference]: With dead ends: 194 [2021-06-05 04:36:34,087 INFO L226 Difference]: Without dead ends: 194 [2021-06-05 04:36:34,087 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 367.4ms TimeCoverageRelationStatistics Valid=105, Invalid=651, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:36:34,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2021-06-05 04:36:34,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 154. [2021-06-05 04:36:34,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 2.2287581699346406) internal successors, (341), 153 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:34,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 341 transitions. [2021-06-05 04:36:34,088 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 341 transitions. Word has length 19 [2021-06-05 04:36:34,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:36:34,088 INFO L482 AbstractCegarLoop]: Abstraction has 154 states and 341 transitions. [2021-06-05 04:36:34,088 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 04:36:34,088 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 341 transitions. [2021-06-05 04:36:34,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:36:34,089 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:36:34,089 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:36:34,289 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 388 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2049 [2021-06-05 04:36:34,289 INFO L430 AbstractCegarLoop]: === Iteration 394 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:36:34,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:36:34,289 INFO L82 PathProgramCache]: Analyzing trace with hash -1336894796, now seen corresponding path program 388 times [2021-06-05 04:36:34,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:36:34,289 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720881953] [2021-06-05 04:36:34,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:36:34,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:36:34,371 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 04:36:34,371 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:36:34,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720881953] [2021-06-05 04:36:34,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720881953] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:34,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266758164] [2021-06-05 04:36:34,372 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 389 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 389 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:36:34,396 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:36:34,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:36:34,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:36:34,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:36:34,519 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 04:36:34,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1266758164] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:34,519 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:36:34,519 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:36:34,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110133163] [2021-06-05 04:36:34,519 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:36:34,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:36:34,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:36:34,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:36:34,519 INFO L87 Difference]: Start difference. First operand 154 states and 341 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:34,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:36:34,688 INFO L93 Difference]: Finished difference Result 165 states and 357 transitions. [2021-06-05 04:36:34,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:36:34,689 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 19 [2021-06-05 04:36:34,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:36:34,689 INFO L225 Difference]: With dead ends: 165 [2021-06-05 04:36:34,689 INFO L226 Difference]: Without dead ends: 157 [2021-06-05 04:36:34,689 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 244.9ms TimeCoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:36:34,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-06-05 04:36:34,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 154. [2021-06-05 04:36:34,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 2.2222222222222223) internal successors, (340), 153 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:34,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 340 transitions. [2021-06-05 04:36:34,690 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 340 transitions. Word has length 19 [2021-06-05 04:36:34,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:36:34,691 INFO L482 AbstractCegarLoop]: Abstraction has 154 states and 340 transitions. [2021-06-05 04:36:34,691 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 04:36:34,691 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 340 transitions. [2021-06-05 04:36:34,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:36:34,691 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:36:34,691 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:36:34,891 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2050,389 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:36:34,891 INFO L430 AbstractCegarLoop]: === Iteration 395 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:36:34,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:36:34,892 INFO L82 PathProgramCache]: Analyzing trace with hash -924417338, now seen corresponding path program 389 times [2021-06-05 04:36:34,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:36:34,892 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684307068] [2021-06-05 04:36:34,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:36:34,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:36:34,967 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:36:34,967 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:36:34,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684307068] [2021-06-05 04:36:34,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684307068] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:34,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853338481] [2021-06-05 04:36:34,967 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 390 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 390 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:36:34,992 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:36:34,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:36:34,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:36:34,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:36:35,111 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:35,111 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:35,112 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 04:36:35,112 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:35,114 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:35,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:36:35,115 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:35,129 INFO L628 ElimStorePlain]: treesize reduction 29, result has 32.6 percent of original size [2021-06-05 04:36:35,129 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 04:36:35,129 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 04:36:35,129 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:57, output treesize:6 [2021-06-05 04:36:35,135 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 04:36:35,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [853338481] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:35,135 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:36:35,135 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:36:35,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27747152] [2021-06-05 04:36:35,135 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:36:35,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:36:35,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:36:35,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:36:35,136 INFO L87 Difference]: Start difference. First operand 154 states and 340 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:35,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:36:35,257 INFO L93 Difference]: Finished difference Result 174 states and 375 transitions. [2021-06-05 04:36:35,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:36:35,257 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 04:36:35,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:36:35,257 INFO L225 Difference]: With dead ends: 174 [2021-06-05 04:36:35,257 INFO L226 Difference]: Without dead ends: 174 [2021-06-05 04:36:35,257 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 155.8ms TimeCoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:36:35,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-06-05 04:36:35,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 151. [2021-06-05 04:36:35,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 2.2) internal successors, (330), 150 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:35,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 330 transitions. [2021-06-05 04:36:35,259 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 330 transitions. Word has length 19 [2021-06-05 04:36:35,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:36:35,259 INFO L482 AbstractCegarLoop]: Abstraction has 151 states and 330 transitions. [2021-06-05 04:36:35,259 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 04:36:35,259 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 330 transitions. [2021-06-05 04:36:35,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:36:35,259 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:36:35,259 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:36:35,459 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 390 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2054 [2021-06-05 04:36:35,460 INFO L430 AbstractCegarLoop]: === Iteration 396 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:36:35,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:36:35,460 INFO L82 PathProgramCache]: Analyzing trace with hash -2089052390, now seen corresponding path program 390 times [2021-06-05 04:36:35,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:36:35,460 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644215943] [2021-06-05 04:36:35,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:36:35,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:36:35,543 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:36:35,543 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:36:35,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644215943] [2021-06-05 04:36:35,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644215943] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:35,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487206291] [2021-06-05 04:36:35,544 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 391 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 391 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:36:35,570 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:36:35,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:36:35,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 04:36:35,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:36:35,684 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:35,684 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:35,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:36:35,685 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:35,687 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:35,687 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 17 treesize of output 13 [2021-06-05 04:36:35,688 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:35,704 INFO L628 ElimStorePlain]: treesize reduction 38, result has 30.9 percent of original size [2021-06-05 04:36:35,704 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 04:36:35,705 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:36:35,705 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:67, output treesize:9 [2021-06-05 04:36:35,721 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 04:36:35,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1487206291] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:35,721 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:36:35,722 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 04:36:35,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865447607] [2021-06-05 04:36:35,722 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:36:35,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:36:35,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:36:35,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:36:35,722 INFO L87 Difference]: Start difference. First operand 151 states and 330 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:35,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:36:35,859 INFO L93 Difference]: Finished difference Result 167 states and 362 transitions. [2021-06-05 04:36:35,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:36:35,860 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:36:35,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:36:35,860 INFO L225 Difference]: With dead ends: 167 [2021-06-05 04:36:35,860 INFO L226 Difference]: Without dead ends: 167 [2021-06-05 04:36:35,860 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 173.3ms TimeCoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:36:35,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-06-05 04:36:35,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 151. [2021-06-05 04:36:35,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 2.2) internal successors, (330), 150 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:35,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 330 transitions. [2021-06-05 04:36:35,861 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 330 transitions. Word has length 19 [2021-06-05 04:36:35,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:36:35,861 INFO L482 AbstractCegarLoop]: Abstraction has 151 states and 330 transitions. [2021-06-05 04:36:35,862 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 04:36:35,862 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 330 transitions. [2021-06-05 04:36:35,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:36:35,862 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:36:35,862 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:36:36,062 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 391 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2058 [2021-06-05 04:36:36,062 INFO L430 AbstractCegarLoop]: === Iteration 397 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:36:36,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:36:36,062 INFO L82 PathProgramCache]: Analyzing trace with hash -2022497462, now seen corresponding path program 391 times [2021-06-05 04:36:36,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:36:36,063 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178764582] [2021-06-05 04:36:36,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:36:36,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:36:36,140 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:36:36,140 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:36:36,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178764582] [2021-06-05 04:36:36,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178764582] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:36,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891794181] [2021-06-05 04:36:36,141 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 392 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 392 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:36:36,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:36:36,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 04:36:36,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:36:36,286 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:36,287 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:36,287 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 17 treesize of output 13 [2021-06-05 04:36:36,288 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:36,290 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:36,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:36:36,290 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:36,308 INFO L628 ElimStorePlain]: treesize reduction 40, result has 29.8 percent of original size [2021-06-05 04:36:36,308 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 04:36:36,308 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 04:36:36,308 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:67, output treesize:9 [2021-06-05 04:36:36,325 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 04:36:36,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [891794181] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:36,325 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:36:36,325 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 04:36:36,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943004458] [2021-06-05 04:36:36,325 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:36:36,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:36:36,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:36:36,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:36:36,326 INFO L87 Difference]: Start difference. First operand 151 states and 330 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:36,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:36:36,664 INFO L93 Difference]: Finished difference Result 189 states and 406 transitions. [2021-06-05 04:36:36,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:36:36,664 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:36:36,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:36:36,664 INFO L225 Difference]: With dead ends: 189 [2021-06-05 04:36:36,664 INFO L226 Difference]: Without dead ends: 189 [2021-06-05 04:36:36,665 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 358.9ms TimeCoverageRelationStatistics Valid=105, Invalid=651, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:36:36,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-06-05 04:36:36,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 152. [2021-06-05 04:36:36,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 2.198675496688742) internal successors, (332), 151 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:36,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 332 transitions. [2021-06-05 04:36:36,666 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 332 transitions. Word has length 19 [2021-06-05 04:36:36,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:36:36,667 INFO L482 AbstractCegarLoop]: Abstraction has 152 states and 332 transitions. [2021-06-05 04:36:36,667 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:36,667 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 332 transitions. [2021-06-05 04:36:36,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:36:36,667 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:36:36,667 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:36:36,876 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 392 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2059 [2021-06-05 04:36:36,877 INFO L430 AbstractCegarLoop]: === Iteration 398 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:36:36,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:36:36,877 INFO L82 PathProgramCache]: Analyzing trace with hash 1027690778, now seen corresponding path program 392 times [2021-06-05 04:36:36,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:36:36,877 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591201547] [2021-06-05 04:36:36,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:36:36,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:36:36,964 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:36:36,964 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:36:36,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591201547] [2021-06-05 04:36:36,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591201547] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:36,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307891186] [2021-06-05 04:36:36,964 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 393 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 393 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:36:36,989 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:36:36,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:36:36,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 04:36:36,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:36:37,132 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:37,133 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:37,133 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 17 treesize of output 13 [2021-06-05 04:36:37,134 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:37,136 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:37,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:36:37,137 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:37,153 INFO L628 ElimStorePlain]: treesize reduction 36, result has 32.1 percent of original size [2021-06-05 04:36:37,154 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 04:36:37,154 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 04:36:37,154 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:67, output treesize:9 [2021-06-05 04:36:37,171 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 04:36:37,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1307891186] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:37,171 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:36:37,171 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 04:36:37,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477205001] [2021-06-05 04:36:37,171 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:36:37,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:36:37,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:36:37,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:36:37,172 INFO L87 Difference]: Start difference. First operand 152 states and 332 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:37,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:36:37,617 INFO L93 Difference]: Finished difference Result 200 states and 426 transitions. [2021-06-05 04:36:37,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:36:37,618 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:36:37,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:36:37,618 INFO L225 Difference]: With dead ends: 200 [2021-06-05 04:36:37,618 INFO L226 Difference]: Without dead ends: 200 [2021-06-05 04:36:37,618 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 469.0ms TimeCoverageRelationStatistics Valid=117, Invalid=639, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:36:37,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-06-05 04:36:37,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 153. [2021-06-05 04:36:37,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 2.1973684210526314) internal successors, (334), 152 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:37,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 334 transitions. [2021-06-05 04:36:37,620 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 334 transitions. Word has length 19 [2021-06-05 04:36:37,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:36:37,620 INFO L482 AbstractCegarLoop]: Abstraction has 153 states and 334 transitions. [2021-06-05 04:36:37,620 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 04:36:37,620 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 334 transitions. [2021-06-05 04:36:37,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:36:37,620 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:36:37,620 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:36:37,820 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2060,393 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:36:37,821 INFO L430 AbstractCegarLoop]: === Iteration 399 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:36:37,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:36:37,821 INFO L82 PathProgramCache]: Analyzing trace with hash 667774260, now seen corresponding path program 393 times [2021-06-05 04:36:37,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:36:37,821 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508505896] [2021-06-05 04:36:37,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:36:37,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:36:37,922 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:36:37,922 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:36:37,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508505896] [2021-06-05 04:36:37,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508505896] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:37,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322600922] [2021-06-05 04:36:37,922 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 394 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 394 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:36:37,952 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:36:37,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:36:37,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:36:37,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:36:38,104 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:38,104 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:38,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:36:38,105 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:38,107 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:38,108 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:38,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:36:38,108 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:38,110 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:38,111 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:38,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:36:38,112 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:38,114 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:38,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:36:38,115 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:38,146 INFO L628 ElimStorePlain]: treesize reduction 53, result has 36.9 percent of original size [2021-06-05 04:36:38,146 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 04:36:38,147 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 04:36:38,147 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:121, output treesize:15 [2021-06-05 04:36:38,185 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:36:38,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1322600922] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:38,185 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:36:38,185 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 04:36:38,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543257801] [2021-06-05 04:36:38,185 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:36:38,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:36:38,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:36:38,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:36:38,186 INFO L87 Difference]: Start difference. First operand 153 states and 334 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:38,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:36:38,765 INFO L93 Difference]: Finished difference Result 199 states and 425 transitions. [2021-06-05 04:36:38,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:36:38,765 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 04:36:38,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:36:38,766 INFO L225 Difference]: With dead ends: 199 [2021-06-05 04:36:38,766 INFO L226 Difference]: Without dead ends: 199 [2021-06-05 04:36:38,766 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 584.9ms TimeCoverageRelationStatistics Valid=119, Invalid=751, Unknown=0, NotChecked=0, Total=870 [2021-06-05 04:36:38,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-06-05 04:36:38,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 154. [2021-06-05 04:36:38,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 2.196078431372549) internal successors, (336), 153 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:38,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 336 transitions. [2021-06-05 04:36:38,767 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 336 transitions. Word has length 19 [2021-06-05 04:36:38,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:36:38,767 INFO L482 AbstractCegarLoop]: Abstraction has 154 states and 336 transitions. [2021-06-05 04:36:38,768 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 04:36:38,768 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 336 transitions. [2021-06-05 04:36:38,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:36:38,768 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:36:38,768 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:36:38,968 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2061,394 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:36:38,968 INFO L430 AbstractCegarLoop]: === Iteration 400 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:36:38,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:36:38,968 INFO L82 PathProgramCache]: Analyzing trace with hash 1377822030, now seen corresponding path program 394 times [2021-06-05 04:36:38,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:36:38,969 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267402484] [2021-06-05 04:36:38,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:36:38,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:36:39,071 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:36:39,071 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:36:39,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267402484] [2021-06-05 04:36:39,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267402484] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:39,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273838489] [2021-06-05 04:36:39,071 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 04:36:39,096 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:36:39,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:36:39,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:36:39,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:36:39,247 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:36:39,247 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [273838489] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:39,247 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:36:39,247 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:36:39,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490468549] [2021-06-05 04:36:39,247 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:36:39,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:36:39,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:36:39,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:36:39,248 INFO L87 Difference]: Start difference. First operand 154 states and 336 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:39,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:36:39,585 INFO L93 Difference]: Finished difference Result 167 states and 363 transitions. [2021-06-05 04:36:39,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:36:39,586 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 04:36:39,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:36:39,586 INFO L225 Difference]: With dead ends: 167 [2021-06-05 04:36:39,586 INFO L226 Difference]: Without dead ends: 167 [2021-06-05 04:36:39,586 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 399.8ms TimeCoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:36:39,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-06-05 04:36:39,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 150. [2021-06-05 04:36:39,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 2.2013422818791946) internal successors, (328), 149 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:39,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 328 transitions. [2021-06-05 04:36:39,587 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 328 transitions. Word has length 19 [2021-06-05 04:36:39,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:36:39,587 INFO L482 AbstractCegarLoop]: Abstraction has 150 states and 328 transitions. [2021-06-05 04:36:39,587 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 04:36:39,588 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 328 transitions. [2021-06-05 04:36:39,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:36:39,588 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:36:39,588 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:36:39,788 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2071,395 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:36:39,788 INFO L430 AbstractCegarLoop]: === Iteration 401 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:36:39,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:36:39,788 INFO L82 PathProgramCache]: Analyzing trace with hash 1032302878, now seen corresponding path program 395 times [2021-06-05 04:36:39,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:36:39,789 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369915650] [2021-06-05 04:36:39,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:36:39,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:36:39,865 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:36:39,866 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:36:39,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369915650] [2021-06-05 04:36:39,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369915650] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:39,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73238148] [2021-06-05 04:36:39,866 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 04:36:39,891 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:36:39,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:36:39,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:36:39,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:36:40,013 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 04:36:40,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [73238148] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:40,013 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:36:40,013 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:36:40,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619600713] [2021-06-05 04:36:40,013 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:36:40,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:36:40,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:36:40,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:36:40,013 INFO L87 Difference]: Start difference. First operand 150 states and 328 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:40,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:36:40,247 INFO L93 Difference]: Finished difference Result 159 states and 340 transitions. [2021-06-05 04:36:40,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:36:40,247 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 04:36:40,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:36:40,247 INFO L225 Difference]: With dead ends: 159 [2021-06-05 04:36:40,247 INFO L226 Difference]: Without dead ends: 150 [2021-06-05 04:36:40,248 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 276.9ms TimeCoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:36:40,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-06-05 04:36:40,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 149. [2021-06-05 04:36:40,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 2.195945945945946) internal successors, (325), 148 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:40,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 325 transitions. [2021-06-05 04:36:40,249 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 325 transitions. Word has length 19 [2021-06-05 04:36:40,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:36:40,249 INFO L482 AbstractCegarLoop]: Abstraction has 149 states and 325 transitions. [2021-06-05 04:36:40,249 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 04:36:40,249 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 325 transitions. [2021-06-05 04:36:40,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:36:40,249 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:36:40,249 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:36:40,449 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2081,396 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:36:40,450 INFO L430 AbstractCegarLoop]: === Iteration 402 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:36:40,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:36:40,450 INFO L82 PathProgramCache]: Analyzing trace with hash 582526930, now seen corresponding path program 396 times [2021-06-05 04:36:40,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:36:40,450 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455667331] [2021-06-05 04:36:40,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:36:40,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:36:40,526 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:36:40,527 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:36:40,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455667331] [2021-06-05 04:36:40,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455667331] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:40,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30947656] [2021-06-05 04:36:40,527 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 397 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 397 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:36:40,551 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:36:40,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:36:40,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 04:36:40,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:36:40,661 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:40,661 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:40,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:36:40,662 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:40,664 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:40,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:36:40,665 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:40,682 INFO L628 ElimStorePlain]: treesize reduction 36, result has 32.1 percent of original size [2021-06-05 04:36:40,682 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 04:36:40,683 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:36:40,683 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:67, output treesize:9 [2021-06-05 04:36:40,699 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 04:36:40,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [30947656] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:40,699 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:36:40,699 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 04:36:40,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848276169] [2021-06-05 04:36:40,699 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:36:40,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:36:40,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:36:40,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:36:40,700 INFO L87 Difference]: Start difference. First operand 149 states and 325 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:40,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:36:40,833 INFO L93 Difference]: Finished difference Result 177 states and 381 transitions. [2021-06-05 04:36:40,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:36:40,833 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:36:40,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:36:40,834 INFO L225 Difference]: With dead ends: 177 [2021-06-05 04:36:40,834 INFO L226 Difference]: Without dead ends: 177 [2021-06-05 04:36:40,834 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 199.4ms TimeCoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:36:40,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-06-05 04:36:40,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 150. [2021-06-05 04:36:40,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 2.1946308724832213) internal successors, (327), 149 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:40,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 327 transitions. [2021-06-05 04:36:40,835 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 327 transitions. Word has length 19 [2021-06-05 04:36:40,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:36:40,835 INFO L482 AbstractCegarLoop]: Abstraction has 150 states and 327 transitions. [2021-06-05 04:36:40,835 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 04:36:40,835 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 327 transitions. [2021-06-05 04:36:40,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:36:40,835 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:36:40,835 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:36:41,036 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 397 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2085 [2021-06-05 04:36:41,036 INFO L430 AbstractCegarLoop]: === Iteration 403 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:36:41,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:36:41,036 INFO L82 PathProgramCache]: Analyzing trace with hash -662252126, now seen corresponding path program 397 times [2021-06-05 04:36:41,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:36:41,036 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998915410] [2021-06-05 04:36:41,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:36:41,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:36:41,114 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:36:41,114 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:36:41,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998915410] [2021-06-05 04:36:41,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998915410] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:41,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767662986] [2021-06-05 04:36:41,115 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 398 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 398 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:36:41,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:36:41,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 04:36:41,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:36:41,257 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:41,258 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:41,258 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 17 treesize of output 13 [2021-06-05 04:36:41,259 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:41,260 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:41,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:36:41,261 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:41,278 INFO L628 ElimStorePlain]: treesize reduction 38, result has 30.9 percent of original size [2021-06-05 04:36:41,278 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 04:36:41,278 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:36:41,278 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:67, output treesize:9 [2021-06-05 04:36:41,295 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 04:36:41,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [767662986] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:41,295 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:36:41,296 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 04:36:41,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890829632] [2021-06-05 04:36:41,296 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:36:41,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:36:41,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:36:41,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:36:41,296 INFO L87 Difference]: Start difference. First operand 150 states and 327 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:41,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:36:41,682 INFO L93 Difference]: Finished difference Result 193 states and 413 transitions. [2021-06-05 04:36:41,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:36:41,682 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:36:41,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:36:41,682 INFO L225 Difference]: With dead ends: 193 [2021-06-05 04:36:41,682 INFO L226 Difference]: Without dead ends: 193 [2021-06-05 04:36:41,682 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 409.8ms TimeCoverageRelationStatistics Valid=128, Invalid=684, Unknown=0, NotChecked=0, Total=812 [2021-06-05 04:36:41,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-06-05 04:36:41,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 151. [2021-06-05 04:36:41,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 2.1933333333333334) internal successors, (329), 150 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:41,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 329 transitions. [2021-06-05 04:36:41,684 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 329 transitions. Word has length 19 [2021-06-05 04:36:41,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:36:41,684 INFO L482 AbstractCegarLoop]: Abstraction has 151 states and 329 transitions. [2021-06-05 04:36:41,684 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 04:36:41,684 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 329 transitions. [2021-06-05 04:36:41,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:36:41,684 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:36:41,684 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:36:41,884 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2086,398 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:36:41,885 INFO L430 AbstractCegarLoop]: === Iteration 404 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:36:41,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:36:41,885 INFO L82 PathProgramCache]: Analyzing trace with hash -1022168644, now seen corresponding path program 398 times [2021-06-05 04:36:41,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:36:41,885 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874699198] [2021-06-05 04:36:41,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:36:41,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:36:41,960 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 04:36:41,960 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:36:41,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874699198] [2021-06-05 04:36:41,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874699198] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:41,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005333650] [2021-06-05 04:36:41,963 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 399 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 399 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:36:41,988 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:36:41,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:36:41,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 04:36:41,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:36:42,093 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:42,093 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:42,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 04:36:42,094 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:42,096 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:42,097 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:42,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 04:36:42,098 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:42,100 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:42,100 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:42,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:36:42,101 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:42,103 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:42,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:36:42,104 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:42,143 INFO L628 ElimStorePlain]: treesize reduction 83, result has 31.4 percent of original size [2021-06-05 04:36:42,143 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 04:36:42,144 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 04:36:42,144 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:141, output treesize:22 [2021-06-05 04:36:42,186 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:36:42,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2005333650] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:42,186 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:36:42,186 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 04:36:42,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655890211] [2021-06-05 04:36:42,186 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:36:42,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:36:42,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:36:42,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:36:42,186 INFO L87 Difference]: Start difference. First operand 151 states and 329 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:42,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:36:42,619 INFO L93 Difference]: Finished difference Result 204 states and 435 transitions. [2021-06-05 04:36:42,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:36:42,619 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 04:36:42,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:36:42,619 INFO L225 Difference]: With dead ends: 204 [2021-06-05 04:36:42,619 INFO L226 Difference]: Without dead ends: 204 [2021-06-05 04:36:42,620 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 424.9ms TimeCoverageRelationStatistics Valid=111, Invalid=645, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:36:42,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-06-05 04:36:42,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 152. [2021-06-05 04:36:42,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 2.19205298013245) internal successors, (331), 151 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:42,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 331 transitions. [2021-06-05 04:36:42,621 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 331 transitions. Word has length 19 [2021-06-05 04:36:42,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:36:42,621 INFO L482 AbstractCegarLoop]: Abstraction has 152 states and 331 transitions. [2021-06-05 04:36:42,621 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 04:36:42,621 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 331 transitions. [2021-06-05 04:36:42,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:36:42,621 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:36:42,621 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:36:42,822 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2087,399 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:36:42,822 INFO L430 AbstractCegarLoop]: === Iteration 405 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:36:42,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:36:42,822 INFO L82 PathProgramCache]: Analyzing trace with hash -312120874, now seen corresponding path program 399 times [2021-06-05 04:36:42,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:36:42,822 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441615632] [2021-06-05 04:36:42,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:36:42,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:36:42,919 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:36:42,920 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:36:42,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441615632] [2021-06-05 04:36:42,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441615632] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:42,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613327299] [2021-06-05 04:36:42,920 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 04:36:42,944 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:36:42,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:36:42,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:36:42,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:36:43,087 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:36:43,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [613327299] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:43,087 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:36:43,087 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:36:43,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610351285] [2021-06-05 04:36:43,087 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:36:43,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:36:43,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:36:43,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:36:43,087 INFO L87 Difference]: Start difference. First operand 152 states and 331 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:43,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:36:43,431 INFO L93 Difference]: Finished difference Result 165 states and 358 transitions. [2021-06-05 04:36:43,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:36:43,431 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 04:36:43,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:36:43,431 INFO L225 Difference]: With dead ends: 165 [2021-06-05 04:36:43,431 INFO L226 Difference]: Without dead ends: 165 [2021-06-05 04:36:43,431 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 370.8ms TimeCoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:36:43,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-06-05 04:36:43,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 149. [2021-06-05 04:36:43,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 2.195945945945946) internal successors, (325), 148 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:43,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 325 transitions. [2021-06-05 04:36:43,433 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 325 transitions. Word has length 19 [2021-06-05 04:36:43,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:36:43,433 INFO L482 AbstractCegarLoop]: Abstraction has 149 states and 325 transitions. [2021-06-05 04:36:43,433 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 04:36:43,433 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 325 transitions. [2021-06-05 04:36:43,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:36:43,434 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:36:43,434 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:36:43,634 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 400 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2090 [2021-06-05 04:36:43,634 INFO L430 AbstractCegarLoop]: === Iteration 406 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:36:43,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:36:43,634 INFO L82 PathProgramCache]: Analyzing trace with hash -1548050406, now seen corresponding path program 400 times [2021-06-05 04:36:43,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:36:43,634 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763078803] [2021-06-05 04:36:43,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:36:43,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:36:43,710 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:36:43,711 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:36:43,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763078803] [2021-06-05 04:36:43,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763078803] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:43,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684359610] [2021-06-05 04:36:43,711 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 401 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 401 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:36:43,735 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:36:43,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:36:43,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:36:43,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:36:43,850 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:43,850 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:43,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:36:43,851 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:43,853 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:43,853 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 15 treesize of output 11 [2021-06-05 04:36:43,854 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:43,868 INFO L628 ElimStorePlain]: treesize reduction 29, result has 32.6 percent of original size [2021-06-05 04:36:43,868 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 04:36:43,868 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:36:43,868 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:57, output treesize:6 [2021-06-05 04:36:43,883 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 04:36:43,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1684359610] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:43,883 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:36:43,883 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 04:36:43,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647743882] [2021-06-05 04:36:43,883 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:36:43,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:36:43,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:36:43,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:36:43,883 INFO L87 Difference]: Start difference. First operand 149 states and 325 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:44,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:36:44,073 INFO L93 Difference]: Finished difference Result 177 states and 381 transitions. [2021-06-05 04:36:44,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:36:44,073 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:36:44,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:36:44,074 INFO L225 Difference]: With dead ends: 177 [2021-06-05 04:36:44,074 INFO L226 Difference]: Without dead ends: 177 [2021-06-05 04:36:44,074 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 224.5ms TimeCoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:36:44,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-06-05 04:36:44,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 150. [2021-06-05 04:36:44,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 2.1946308724832213) internal successors, (327), 149 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:44,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 327 transitions. [2021-06-05 04:36:44,075 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 327 transitions. Word has length 19 [2021-06-05 04:36:44,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:36:44,075 INFO L482 AbstractCegarLoop]: Abstraction has 150 states and 327 transitions. [2021-06-05 04:36:44,075 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 04:36:44,075 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 327 transitions. [2021-06-05 04:36:44,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:36:44,076 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:36:44,076 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:36:44,276 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 401 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2100 [2021-06-05 04:36:44,276 INFO L430 AbstractCegarLoop]: === Iteration 407 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:36:44,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:36:44,276 INFO L82 PathProgramCache]: Analyzing trace with hash -1907966924, now seen corresponding path program 401 times [2021-06-05 04:36:44,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:36:44,276 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436714649] [2021-06-05 04:36:44,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:36:44,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:36:44,347 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:36:44,348 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:36:44,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436714649] [2021-06-05 04:36:44,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436714649] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:44,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938287442] [2021-06-05 04:36:44,348 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 402 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 402 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:36:44,372 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:36:44,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:36:44,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:36:44,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:36:44,485 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:44,486 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:44,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:36:44,487 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:44,489 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:44,489 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:44,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:36:44,490 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:44,492 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:44,493 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:44,493 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 04:36:44,493 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:44,495 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:44,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:36:44,496 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:44,528 INFO L628 ElimStorePlain]: treesize reduction 53, result has 36.9 percent of original size [2021-06-05 04:36:44,528 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 04:36:44,529 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 04:36:44,529 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:121, output treesize:15 [2021-06-05 04:36:44,553 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:36:44,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1938287442] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:44,553 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:36:44,553 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:36:44,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780295047] [2021-06-05 04:36:44,553 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:36:44,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:36:44,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:36:44,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:36:44,554 INFO L87 Difference]: Start difference. First operand 150 states and 327 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:44,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:36:44,759 INFO L93 Difference]: Finished difference Result 190 states and 408 transitions. [2021-06-05 04:36:44,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:36:44,760 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 04:36:44,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:36:44,760 INFO L225 Difference]: With dead ends: 190 [2021-06-05 04:36:44,760 INFO L226 Difference]: Without dead ends: 190 [2021-06-05 04:36:44,760 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 249.0ms TimeCoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:36:44,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-06-05 04:36:44,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 151. [2021-06-05 04:36:44,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 2.1933333333333334) internal successors, (329), 150 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:44,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 329 transitions. [2021-06-05 04:36:44,761 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 329 transitions. Word has length 19 [2021-06-05 04:36:44,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:36:44,761 INFO L482 AbstractCegarLoop]: Abstraction has 151 states and 329 transitions. [2021-06-05 04:36:44,762 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 04:36:44,762 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 329 transitions. [2021-06-05 04:36:44,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:36:44,762 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:36:44,762 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:36:44,962 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 402 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2104 [2021-06-05 04:36:44,962 INFO L430 AbstractCegarLoop]: === Iteration 408 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:36:44,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:36:44,962 INFO L82 PathProgramCache]: Analyzing trace with hash -1197919154, now seen corresponding path program 402 times [2021-06-05 04:36:44,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:36:44,963 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340440068] [2021-06-05 04:36:44,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:36:44,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:36:45,043 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:36:45,043 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:36:45,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340440068] [2021-06-05 04:36:45,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340440068] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:45,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829044240] [2021-06-05 04:36:45,043 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 403 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 403 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:36:45,107 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:36:45,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:36:45,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:36:45,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:36:45,233 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 04:36:45,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [829044240] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:45,233 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:36:45,233 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:36:45,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918968471] [2021-06-05 04:36:45,233 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:36:45,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:36:45,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:36:45,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:36:45,233 INFO L87 Difference]: Start difference. First operand 151 states and 329 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:45,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:36:45,421 INFO L93 Difference]: Finished difference Result 165 states and 358 transitions. [2021-06-05 04:36:45,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:36:45,421 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 04:36:45,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:36:45,421 INFO L225 Difference]: With dead ends: 165 [2021-06-05 04:36:45,421 INFO L226 Difference]: Without dead ends: 165 [2021-06-05 04:36:45,421 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 244.5ms TimeCoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:36:45,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-06-05 04:36:45,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 149. [2021-06-05 04:36:45,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 2.195945945945946) internal successors, (325), 148 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:45,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 325 transitions. [2021-06-05 04:36:45,423 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 325 transitions. Word has length 19 [2021-06-05 04:36:45,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:36:45,423 INFO L482 AbstractCegarLoop]: Abstraction has 149 states and 325 transitions. [2021-06-05 04:36:45,423 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 04:36:45,423 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 325 transitions. [2021-06-05 04:36:45,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:36:45,423 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:36:45,423 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:36:45,623 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2114,403 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:36:45,624 INFO L430 AbstractCegarLoop]: === Iteration 409 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:36:45,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:36:45,624 INFO L82 PathProgramCache]: Analyzing trace with hash -369852718, now seen corresponding path program 403 times [2021-06-05 04:36:45,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:36:45,624 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161956556] [2021-06-05 04:36:45,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:36:45,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:36:45,707 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:36:45,707 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:36:45,707 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161956556] [2021-06-05 04:36:45,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161956556] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:45,707 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919995130] [2021-06-05 04:36:45,707 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 404 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 404 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:36:45,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:36:45,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:36:45,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:36:45,850 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:45,851 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:45,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:36:45,851 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:45,854 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:45,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:36:45,855 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:45,890 INFO L628 ElimStorePlain]: treesize reduction 60, result has 38.8 percent of original size [2021-06-05 04:36:45,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index 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 04:36:45,893 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:45,905 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:36:45,905 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 04:36:45,905 INFO L518 ElimStorePlain]: Eliminatee v_prenex_337 vanished before elimination [2021-06-05 04:36:45,906 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:36:45,906 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-06-05 04:36:45,944 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 04:36:45,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1919995130] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:45,945 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:36:45,945 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 04:36:45,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977567089] [2021-06-05 04:36:45,945 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:36:45,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:36:45,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:36:45,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:36:45,945 INFO L87 Difference]: Start difference. First operand 149 states and 325 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:46,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:36:46,165 INFO L93 Difference]: Finished difference Result 178 states and 375 transitions. [2021-06-05 04:36:46,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:36:46,166 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:36:46,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:36:46,166 INFO L225 Difference]: With dead ends: 178 [2021-06-05 04:36:46,166 INFO L226 Difference]: Without dead ends: 178 [2021-06-05 04:36:46,166 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 261.3ms TimeCoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:36:46,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-06-05 04:36:46,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 151. [2021-06-05 04:36:46,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 2.2) internal successors, (330), 150 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:46,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 330 transitions. [2021-06-05 04:36:46,168 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 330 transitions. Word has length 19 [2021-06-05 04:36:46,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:36:46,168 INFO L482 AbstractCegarLoop]: Abstraction has 151 states and 330 transitions. [2021-06-05 04:36:46,168 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 04:36:46,168 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 330 transitions. [2021-06-05 04:36:46,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:36:46,168 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:36:46,168 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:36:46,368 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 404 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2124 [2021-06-05 04:36:46,368 INFO L430 AbstractCegarLoop]: === Iteration 410 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:36:46,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:36:46,369 INFO L82 PathProgramCache]: Analyzing trace with hash -1242787972, now seen corresponding path program 404 times [2021-06-05 04:36:46,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:36:46,369 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970983670] [2021-06-05 04:36:46,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:36:46,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:36:46,457 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:36:46,457 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:36:46,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970983670] [2021-06-05 04:36:46,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970983670] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:46,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [535324343] [2021-06-05 04:36:46,457 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 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 04:36:46,481 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:36:46,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:36:46,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 04:36:46,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:36:46,632 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:36:46,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [535324343] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:46,633 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:36:46,633 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:36:46,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980313032] [2021-06-05 04:36:46,633 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:36:46,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:36:46,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:36:46,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:36:46,633 INFO L87 Difference]: Start difference. First operand 151 states and 330 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:46,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:36:46,813 INFO L93 Difference]: Finished difference Result 155 states and 334 transitions. [2021-06-05 04:36:46,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:36:46,813 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 04:36:46,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:36:46,813 INFO L225 Difference]: With dead ends: 155 [2021-06-05 04:36:46,813 INFO L226 Difference]: Without dead ends: 151 [2021-06-05 04:36:46,813 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 211.1ms TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:36:46,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-06-05 04:36:46,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2021-06-05 04:36:46,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 2.1933333333333334) internal successors, (329), 150 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:46,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 329 transitions. [2021-06-05 04:36:46,815 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 329 transitions. Word has length 19 [2021-06-05 04:36:46,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:36:46,815 INFO L482 AbstractCegarLoop]: Abstraction has 151 states and 329 transitions. [2021-06-05 04:36:46,815 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 04:36:46,815 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 329 transitions. [2021-06-05 04:36:46,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:36:46,815 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:36:46,815 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:36:47,015 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2131,405 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:36:47,015 INFO L430 AbstractCegarLoop]: === Iteration 411 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:36:47,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:36:47,016 INFO L82 PathProgramCache]: Analyzing trace with hash -1155906738, now seen corresponding path program 405 times [2021-06-05 04:36:47,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:36:47,016 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831638903] [2021-06-05 04:36:47,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:36:47,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:36:47,101 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 04:36:47,102 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:36:47,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831638903] [2021-06-05 04:36:47,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831638903] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:47,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [410861992] [2021-06-05 04:36:47,102 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 406 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 406 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:36:47,127 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 04:36:47,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:36:47,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:36:47,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:36:47,270 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:36:47,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [410861992] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:47,270 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:36:47,270 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:36:47,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253681427] [2021-06-05 04:36:47,271 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:36:47,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:36:47,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:36:47,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:36:47,271 INFO L87 Difference]: Start difference. First operand 151 states and 329 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:47,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:36:47,371 INFO L93 Difference]: Finished difference Result 175 states and 377 transitions. [2021-06-05 04:36:47,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:36:47,372 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 04:36:47,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:36:47,372 INFO L225 Difference]: With dead ends: 175 [2021-06-05 04:36:47,372 INFO L226 Difference]: Without dead ends: 175 [2021-06-05 04:36:47,372 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 166.4ms TimeCoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:36:47,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-06-05 04:36:47,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 151. [2021-06-05 04:36:47,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 2.1933333333333334) internal successors, (329), 150 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:47,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 329 transitions. [2021-06-05 04:36:47,373 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 329 transitions. Word has length 19 [2021-06-05 04:36:47,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:36:47,373 INFO L482 AbstractCegarLoop]: Abstraction has 151 states and 329 transitions. [2021-06-05 04:36:47,373 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 04:36:47,373 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 329 transitions. [2021-06-05 04:36:47,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:36:47,374 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:36:47,374 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:36:47,574 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 406 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2136 [2021-06-05 04:36:47,574 INFO L430 AbstractCegarLoop]: === Iteration 412 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:36:47,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:36:47,574 INFO L82 PathProgramCache]: Analyzing trace with hash -266095542, now seen corresponding path program 406 times [2021-06-05 04:36:47,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:36:47,574 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370550288] [2021-06-05 04:36:47,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:36:47,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:36:47,664 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:36:47,664 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:36:47,664 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370550288] [2021-06-05 04:36:47,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370550288] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:47,664 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119917245] [2021-06-05 04:36:47,664 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 407 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 407 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:36:47,691 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:36:47,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:36:47,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 04:36:47,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:36:47,798 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:47,799 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:47,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:36:47,799 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:47,801 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:47,802 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 17 treesize of output 13 [2021-06-05 04:36:47,802 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:47,819 INFO L628 ElimStorePlain]: treesize reduction 36, result has 32.1 percent of original size [2021-06-05 04:36:47,819 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 04:36:47,820 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 04:36:47,820 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:67, output treesize:9 [2021-06-05 04:36:47,836 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 04:36:47,836 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1119917245] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:47,836 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:36:47,836 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 04:36:47,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178049132] [2021-06-05 04:36:47,836 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:36:47,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:36:47,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:36:47,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:36:47,837 INFO L87 Difference]: Start difference. First operand 151 states and 329 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:48,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:36:48,000 INFO L93 Difference]: Finished difference Result 178 states and 383 transitions. [2021-06-05 04:36:48,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:36:48,001 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:36:48,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:36:48,001 INFO L225 Difference]: With dead ends: 178 [2021-06-05 04:36:48,001 INFO L226 Difference]: Without dead ends: 178 [2021-06-05 04:36:48,001 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 206.0ms TimeCoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:36:48,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-06-05 04:36:48,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 151. [2021-06-05 04:36:48,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 2.1933333333333334) internal successors, (329), 150 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:48,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 329 transitions. [2021-06-05 04:36:48,002 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 329 transitions. Word has length 19 [2021-06-05 04:36:48,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:36:48,002 INFO L482 AbstractCegarLoop]: Abstraction has 151 states and 329 transitions. [2021-06-05 04:36:48,003 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 04:36:48,003 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 329 transitions. [2021-06-05 04:36:48,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:36:48,003 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:36:48,003 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:36:48,224 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 407 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2140 [2021-06-05 04:36:48,225 INFO L430 AbstractCegarLoop]: === Iteration 413 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:36:48,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:36:48,225 INFO L82 PathProgramCache]: Analyzing trace with hash -1510874598, now seen corresponding path program 407 times [2021-06-05 04:36:48,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:36:48,225 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504179400] [2021-06-05 04:36:48,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:36:48,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:36:48,298 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:36:48,298 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:36:48,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504179400] [2021-06-05 04:36:48,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504179400] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:48,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830174142] [2021-06-05 04:36:48,299 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 408 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 408 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:36:48,324 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:36:48,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:36:48,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:36:48,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:36:48,447 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:48,447 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:48,447 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 04:36:48,448 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:48,450 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:48,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:36:48,451 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:48,464 INFO L628 ElimStorePlain]: treesize reduction 29, result has 32.6 percent of original size [2021-06-05 04:36:48,464 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 04:36:48,465 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:36:48,465 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:57, output treesize:6 [2021-06-05 04:36:48,480 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 04:36:48,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [830174142] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:48,480 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:36:48,480 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 04:36:48,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348499555] [2021-06-05 04:36:48,480 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:36:48,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:36:48,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:36:48,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:36:48,480 INFO L87 Difference]: Start difference. First operand 151 states and 329 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:48,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:36:48,820 INFO L93 Difference]: Finished difference Result 196 states and 419 transitions. [2021-06-05 04:36:48,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:36:48,820 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:36:48,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:36:48,820 INFO L225 Difference]: With dead ends: 196 [2021-06-05 04:36:48,820 INFO L226 Difference]: Without dead ends: 196 [2021-06-05 04:36:48,820 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 344.8ms TimeCoverageRelationStatistics Valid=110, Invalid=646, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:36:48,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-06-05 04:36:48,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 152. [2021-06-05 04:36:48,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 2.19205298013245) internal successors, (331), 151 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:48,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 331 transitions. [2021-06-05 04:36:48,822 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 331 transitions. Word has length 19 [2021-06-05 04:36:48,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:36:48,822 INFO L482 AbstractCegarLoop]: Abstraction has 152 states and 331 transitions. [2021-06-05 04:36:48,822 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 04:36:48,822 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 331 transitions. [2021-06-05 04:36:48,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:36:48,822 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:36:48,822 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:36:49,022 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2141,408 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:36:49,023 INFO L430 AbstractCegarLoop]: === Iteration 414 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:36:49,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:36:49,023 INFO L82 PathProgramCache]: Analyzing trace with hash -1870791116, now seen corresponding path program 408 times [2021-06-05 04:36:49,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:36:49,023 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420715718] [2021-06-05 04:36:49,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:36:49,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:36:49,097 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:36:49,097 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:36:49,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420715718] [2021-06-05 04:36:49,098 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420715718] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:49,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781183770] [2021-06-05 04:36:49,098 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 409 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 409 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:36:49,123 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 04:36:49,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:36:49,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:36:49,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:36:49,244 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:49,244 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:49,244 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 17 treesize of output 13 [2021-06-05 04:36:49,245 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:49,247 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:49,248 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:49,248 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 16 treesize of output 12 [2021-06-05 04:36:49,248 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:49,250 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:49,251 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:49,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:36:49,252 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:49,254 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:49,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:36:49,254 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:49,286 INFO L628 ElimStorePlain]: treesize reduction 53, result has 36.9 percent of original size [2021-06-05 04:36:49,286 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 04:36:49,287 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 04:36:49,287 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:121, output treesize:15 [2021-06-05 04:36:49,323 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 04:36:49,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1781183770] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:49,324 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:36:49,324 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 04:36:49,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454325399] [2021-06-05 04:36:49,324 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:36:49,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:36:49,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:36:49,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:36:49,324 INFO L87 Difference]: Start difference. First operand 152 states and 331 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:49,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:36:49,721 INFO L93 Difference]: Finished difference Result 205 states and 438 transitions. [2021-06-05 04:36:49,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:36:49,721 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 04:36:49,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:36:49,721 INFO L225 Difference]: With dead ends: 205 [2021-06-05 04:36:49,721 INFO L226 Difference]: Without dead ends: 205 [2021-06-05 04:36:49,721 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 444.6ms TimeCoverageRelationStatistics Valid=117, Invalid=695, Unknown=0, NotChecked=0, Total=812 [2021-06-05 04:36:49,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-06-05 04:36:49,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 153. [2021-06-05 04:36:49,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 2.1907894736842106) internal successors, (333), 152 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:49,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 333 transitions. [2021-06-05 04:36:49,723 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 333 transitions. Word has length 19 [2021-06-05 04:36:49,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:36:49,723 INFO L482 AbstractCegarLoop]: Abstraction has 153 states and 333 transitions. [2021-06-05 04:36:49,723 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 04:36:49,723 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 333 transitions. [2021-06-05 04:36:49,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:36:49,723 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:36:49,723 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:36:49,924 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 409 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2145 [2021-06-05 04:36:49,924 INFO L430 AbstractCegarLoop]: === Iteration 415 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:36:49,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:36:49,924 INFO L82 PathProgramCache]: Analyzing trace with hash -1160743346, now seen corresponding path program 409 times [2021-06-05 04:36:49,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:36:49,924 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38398810] [2021-06-05 04:36:49,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:36:49,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:36:50,008 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 04:36:50,008 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:36:50,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38398810] [2021-06-05 04:36:50,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38398810] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:50,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559547838] [2021-06-05 04:36:50,009 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 04:36:50,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:36:50,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:36:50,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:36:50,168 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:36:50,168 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1559547838] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:50,168 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:36:50,168 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:36:50,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064674959] [2021-06-05 04:36:50,168 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:36:50,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:36:50,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:36:50,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:36:50,169 INFO L87 Difference]: Start difference. First operand 153 states and 333 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:50,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:36:50,515 INFO L93 Difference]: Finished difference Result 167 states and 362 transitions. [2021-06-05 04:36:50,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:36:50,515 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 04:36:50,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:36:50,515 INFO L225 Difference]: With dead ends: 167 [2021-06-05 04:36:50,515 INFO L226 Difference]: Without dead ends: 167 [2021-06-05 04:36:50,516 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 357.5ms TimeCoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:36:50,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-06-05 04:36:50,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 150. [2021-06-05 04:36:50,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 2.1946308724832213) internal successors, (327), 149 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:50,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 327 transitions. [2021-06-05 04:36:50,522 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 327 transitions. Word has length 19 [2021-06-05 04:36:50,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:36:50,522 INFO L482 AbstractCegarLoop]: Abstraction has 150 states and 327 transitions. [2021-06-05 04:36:50,523 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 04:36:50,523 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 327 transitions. [2021-06-05 04:36:50,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:36:50,523 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:36:50,523 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:36:50,744 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 410 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2155 [2021-06-05 04:36:50,745 INFO L430 AbstractCegarLoop]: === Iteration 416 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:36:50,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:36:50,745 INFO L82 PathProgramCache]: Analyzing trace with hash 1898294418, now seen corresponding path program 410 times [2021-06-05 04:36:50,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:36:50,745 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197558617] [2021-06-05 04:36:50,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:36:50,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:36:50,827 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:36:50,828 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:36:50,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197558617] [2021-06-05 04:36:50,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197558617] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:50,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767161091] [2021-06-05 04:36:50,828 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 411 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 411 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:36:50,862 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:36:50,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:36:50,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 04:36:50,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:36:50,970 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:50,971 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:50,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:36:50,972 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:50,974 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:50,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:36:50,974 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:50,991 INFO L628 ElimStorePlain]: treesize reduction 38, result has 30.9 percent of original size [2021-06-05 04:36:50,991 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 04:36:50,992 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 04:36:50,992 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:67, output treesize:9 [2021-06-05 04:36:51,007 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 04:36:51,007 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1767161091] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:51,007 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:36:51,007 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 04:36:51,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813351057] [2021-06-05 04:36:51,007 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:36:51,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:36:51,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:36:51,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:36:51,008 INFO L87 Difference]: Start difference. First operand 150 states and 327 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:51,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:36:51,162 INFO L93 Difference]: Finished difference Result 180 states and 387 transitions. [2021-06-05 04:36:51,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:36:51,162 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:36:51,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:36:51,163 INFO L225 Difference]: With dead ends: 180 [2021-06-05 04:36:51,163 INFO L226 Difference]: Without dead ends: 180 [2021-06-05 04:36:51,163 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 218.1ms TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:36:51,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2021-06-05 04:36:51,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 152. [2021-06-05 04:36:51,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 2.19205298013245) internal successors, (331), 151 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:51,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 331 transitions. [2021-06-05 04:36:51,164 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 331 transitions. Word has length 19 [2021-06-05 04:36:51,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:36:51,164 INFO L482 AbstractCegarLoop]: Abstraction has 152 states and 331 transitions. [2021-06-05 04:36:51,164 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 04:36:51,164 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 331 transitions. [2021-06-05 04:36:51,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:36:51,164 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:36:51,164 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:36:51,365 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2165,411 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:36:51,365 INFO L430 AbstractCegarLoop]: === Iteration 417 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:36:51,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:36:51,365 INFO L82 PathProgramCache]: Analyzing trace with hash 1538377900, now seen corresponding path program 411 times [2021-06-05 04:36:51,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:36:51,365 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722411620] [2021-06-05 04:36:51,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:36:51,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:36:51,440 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:36:51,440 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:36:51,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722411620] [2021-06-05 04:36:51,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722411620] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:51,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547696103] [2021-06-05 04:36:51,441 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 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 04:36:51,465 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 04:36:51,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:36:51,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:36:51,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:36:51,575 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:51,575 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:51,575 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 04:36:51,576 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:51,578 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:51,578 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:51,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:36:51,580 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:51,582 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:51,582 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:51,582 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 16 treesize of output 12 [2021-06-05 04:36:51,583 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:51,585 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:51,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:36:51,585 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:51,617 INFO L628 ElimStorePlain]: treesize reduction 53, result has 36.9 percent of original size [2021-06-05 04:36:51,617 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 04:36:51,618 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 04:36:51,618 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:121, output treesize:15 [2021-06-05 04:36:51,652 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 04:36:51,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1547696103] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:51,653 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:36:51,653 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 04:36:51,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974895021] [2021-06-05 04:36:51,653 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:36:51,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:36:51,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:36:51,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:36:51,653 INFO L87 Difference]: Start difference. First operand 152 states and 331 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:51,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:36:51,943 INFO L93 Difference]: Finished difference Result 199 states and 426 transitions. [2021-06-05 04:36:51,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:36:51,943 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 04:36:51,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:36:51,944 INFO L225 Difference]: With dead ends: 199 [2021-06-05 04:36:51,944 INFO L226 Difference]: Without dead ends: 199 [2021-06-05 04:36:51,944 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 330.5ms TimeCoverageRelationStatistics Valid=103, Invalid=599, Unknown=0, NotChecked=0, Total=702 [2021-06-05 04:36:51,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-06-05 04:36:51,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 153. [2021-06-05 04:36:51,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 2.1907894736842106) internal successors, (333), 152 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:51,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 333 transitions. [2021-06-05 04:36:51,945 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 333 transitions. Word has length 19 [2021-06-05 04:36:51,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:36:51,945 INFO L482 AbstractCegarLoop]: Abstraction has 153 states and 333 transitions. [2021-06-05 04:36:51,945 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 04:36:51,945 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 333 transitions. [2021-06-05 04:36:51,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:36:51,946 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:36:51,946 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:36:52,146 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 412 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2166 [2021-06-05 04:36:52,146 INFO L430 AbstractCegarLoop]: === Iteration 418 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:36:52,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:36:52,146 INFO L82 PathProgramCache]: Analyzing trace with hash -2046541626, now seen corresponding path program 412 times [2021-06-05 04:36:52,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:36:52,146 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425407412] [2021-06-05 04:36:52,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:36:52,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:36:52,231 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:36:52,231 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:36:52,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425407412] [2021-06-05 04:36:52,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425407412] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:52,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951118235] [2021-06-05 04:36:52,232 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 413 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 413 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:36:52,255 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:36:52,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:36:52,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:36:52,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:36:52,384 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:36:52,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [951118235] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:52,385 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:36:52,385 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:36:52,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323832856] [2021-06-05 04:36:52,385 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:36:52,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:36:52,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:36:52,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:36:52,385 INFO L87 Difference]: Start difference. First operand 153 states and 333 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:52,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:36:52,619 INFO L93 Difference]: Finished difference Result 166 states and 360 transitions. [2021-06-05 04:36:52,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:36:52,620 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 04:36:52,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:36:52,620 INFO L225 Difference]: With dead ends: 166 [2021-06-05 04:36:52,620 INFO L226 Difference]: Without dead ends: 166 [2021-06-05 04:36:52,620 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 289.8ms TimeCoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:36:52,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-06-05 04:36:52,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 151. [2021-06-05 04:36:52,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 2.1933333333333334) internal successors, (329), 150 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:52,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 329 transitions. [2021-06-05 04:36:52,621 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 329 transitions. Word has length 19 [2021-06-05 04:36:52,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:36:52,622 INFO L482 AbstractCegarLoop]: Abstraction has 151 states and 329 transitions. [2021-06-05 04:36:52,622 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 04:36:52,622 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 329 transitions. [2021-06-05 04:36:52,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:36:52,622 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:36:52,622 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:36:52,822 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2176,413 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:36:52,822 INFO L430 AbstractCegarLoop]: === Iteration 419 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:36:52,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:36:52,822 INFO L82 PathProgramCache]: Analyzing trace with hash -1218475190, now seen corresponding path program 413 times [2021-06-05 04:36:52,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:36:52,823 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628543854] [2021-06-05 04:36:52,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:36:52,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:36:52,903 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:36:52,903 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:36:52,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628543854] [2021-06-05 04:36:52,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628543854] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:52,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086149770] [2021-06-05 04:36:52,903 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 414 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 414 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:36:52,928 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:36:52,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:36:52,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:36:52,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:36:53,045 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:53,045 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:53,045 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 04:36:53,046 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:53,048 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:53,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:36:53,049 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:53,087 INFO L628 ElimStorePlain]: treesize reduction 68, result has 36.4 percent of original size [2021-06-05 04:36:53,087 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 04:36:53,089 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 8 treesize of output 6 [2021-06-05 04:36:53,090 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:53,102 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:36:53,102 INFO L518 ElimStorePlain]: Eliminatee v_prenex_341 vanished before elimination [2021-06-05 04:36:53,103 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 04:36:53,103 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-06-05 04:36:53,141 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:36:53,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1086149770] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:53,141 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:36:53,141 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 04:36:53,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97892964] [2021-06-05 04:36:53,141 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:36:53,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:36:53,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:36:53,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:36:53,141 INFO L87 Difference]: Start difference. First operand 151 states and 329 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:53,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:36:53,381 INFO L93 Difference]: Finished difference Result 180 states and 379 transitions. [2021-06-05 04:36:53,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:36:53,381 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:36:53,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:36:53,381 INFO L225 Difference]: With dead ends: 180 [2021-06-05 04:36:53,382 INFO L226 Difference]: Without dead ends: 180 [2021-06-05 04:36:53,382 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 254.2ms TimeCoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:36:53,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2021-06-05 04:36:53,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 153. [2021-06-05 04:36:53,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 2.1973684210526314) internal successors, (334), 152 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:53,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 334 transitions. [2021-06-05 04:36:53,383 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 334 transitions. Word has length 19 [2021-06-05 04:36:53,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:36:53,383 INFO L482 AbstractCegarLoop]: Abstraction has 153 states and 334 transitions. [2021-06-05 04:36:53,383 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 04:36:53,383 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 334 transitions. [2021-06-05 04:36:53,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:36:53,383 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:36:53,383 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:36:53,584 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2186,414 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:36:53,584 INFO L430 AbstractCegarLoop]: === Iteration 420 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:36:53,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:36:53,584 INFO L82 PathProgramCache]: Analyzing trace with hash 791710520, now seen corresponding path program 414 times [2021-06-05 04:36:53,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:36:53,584 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36550814] [2021-06-05 04:36:53,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:36:53,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:36:53,658 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:36:53,658 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:36:53,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36550814] [2021-06-05 04:36:53,658 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36550814] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:53,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611668368] [2021-06-05 04:36:53,658 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 415 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 415 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:36:53,683 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 04:36:53,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:36:53,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 04:36:53,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:36:53,790 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:53,791 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:53,791 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 18 treesize of output 14 [2021-06-05 04:36:53,792 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:53,794 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:53,794 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 18 treesize of output 14 [2021-06-05 04:36:53,795 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:53,846 INFO L628 ElimStorePlain]: treesize reduction 72, result has 39.5 percent of original size [2021-06-05 04:36:53,846 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 04:36:53,848 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:53,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:36:53,849 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:53,864 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:36:53,866 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:53,867 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 9 treesize of output 5 [2021-06-05 04:36:53,868 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:36:53,882 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:36:53,884 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 04:36:53,884 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:133, output treesize:22 [2021-06-05 04:36:53,924 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 04:36:53,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [611668368] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:53,925 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:36:53,925 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 04:36:53,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315307835] [2021-06-05 04:36:53,925 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:36:53,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:36:53,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:36:53,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:36:53,925 INFO L87 Difference]: Start difference. First operand 153 states and 334 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:54,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:36:54,092 INFO L93 Difference]: Finished difference Result 223 states and 465 transitions. [2021-06-05 04:36:54,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:36:54,092 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 04:36:54,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:36:54,092 INFO L225 Difference]: With dead ends: 223 [2021-06-05 04:36:54,092 INFO L226 Difference]: Without dead ends: 223 [2021-06-05 04:36:54,092 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 204.4ms TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:36:54,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2021-06-05 04:36:54,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 154. [2021-06-05 04:36:54,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 2.215686274509804) internal successors, (339), 153 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:54,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 339 transitions. [2021-06-05 04:36:54,094 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 339 transitions. Word has length 19 [2021-06-05 04:36:54,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:36:54,094 INFO L482 AbstractCegarLoop]: Abstraction has 154 states and 339 transitions. [2021-06-05 04:36:54,094 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 04:36:54,094 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 339 transitions. [2021-06-05 04:36:54,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:36:54,094 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:36:54,094 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:36:54,294 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2193,415 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:36:54,295 INFO L430 AbstractCegarLoop]: === Iteration 421 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:36:54,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:36:54,295 INFO L82 PathProgramCache]: Analyzing trace with hash -2091410444, now seen corresponding path program 415 times [2021-06-05 04:36:54,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:36:54,295 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825557098] [2021-06-05 04:36:54,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:36:54,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:36:54,388 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:36:54,388 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:36:54,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825557098] [2021-06-05 04:36:54,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825557098] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:54,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1586525197] [2021-06-05 04:36:54,388 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 416 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 416 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:36:54,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:36:54,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:36:54,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:36:54,555 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:36:54,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1586525197] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:54,555 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:36:54,555 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:36:54,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430850353] [2021-06-05 04:36:54,555 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:36:54,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:36:54,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:36:54,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:36:54,556 INFO L87 Difference]: Start difference. First operand 154 states and 339 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:54,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:36:54,761 INFO L93 Difference]: Finished difference Result 158 states and 343 transitions. [2021-06-05 04:36:54,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:36:54,761 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 04:36:54,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:36:54,761 INFO L225 Difference]: With dead ends: 158 [2021-06-05 04:36:54,761 INFO L226 Difference]: Without dead ends: 154 [2021-06-05 04:36:54,762 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 280.5ms TimeCoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:36:54,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-06-05 04:36:54,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 154. [2021-06-05 04:36:54,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 2.2091503267973858) internal successors, (338), 153 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:54,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 338 transitions. [2021-06-05 04:36:54,763 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 338 transitions. Word has length 19 [2021-06-05 04:36:54,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:36:54,763 INFO L482 AbstractCegarLoop]: Abstraction has 154 states and 338 transitions. [2021-06-05 04:36:54,763 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 04:36:54,763 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 338 transitions. [2021-06-05 04:36:54,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:36:54,763 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:36:54,763 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:36:54,964 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2197,416 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:36:54,964 INFO L430 AbstractCegarLoop]: === Iteration 422 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:36:54,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:36:54,964 INFO L82 PathProgramCache]: Analyzing trace with hash -2004529210, now seen corresponding path program 416 times [2021-06-05 04:36:54,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:36:54,964 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680642156] [2021-06-05 04:36:54,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:36:54,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:36:55,040 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 04:36:55,040 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:36:55,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680642156] [2021-06-05 04:36:55,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680642156] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:55,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487410092] [2021-06-05 04:36:55,040 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 417 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 417 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:36:55,064 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:36:55,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:36:55,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 04:36:55,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:36:55,179 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:55,180 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:55,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:36:55,181 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:55,183 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:55,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:36:55,183 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:55,201 INFO L628 ElimStorePlain]: treesize reduction 28, result has 42.9 percent of original size [2021-06-05 04:36:55,203 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:55,203 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 9 treesize of output 5 [2021-06-05 04:36:55,205 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:36:55,210 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:36:55,211 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 04:36:55,211 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:63, output treesize:9 [2021-06-05 04:36:55,230 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 04:36:55,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [487410092] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:55,230 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:36:55,230 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 04:36:55,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113613970] [2021-06-05 04:36:55,230 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:36:55,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:36:55,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:36:55,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:36:55,230 INFO L87 Difference]: Start difference. First operand 154 states and 338 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:55,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:36:55,310 INFO L93 Difference]: Finished difference Result 176 states and 379 transitions. [2021-06-05 04:36:55,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:36:55,310 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 04:36:55,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:36:55,310 INFO L225 Difference]: With dead ends: 176 [2021-06-05 04:36:55,310 INFO L226 Difference]: Without dead ends: 176 [2021-06-05 04:36:55,310 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 164.1ms TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:36:55,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-06-05 04:36:55,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 149. [2021-06-05 04:36:55,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 2.195945945945946) internal successors, (325), 148 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:55,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 325 transitions. [2021-06-05 04:36:55,312 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 325 transitions. Word has length 19 [2021-06-05 04:36:55,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:36:55,312 INFO L482 AbstractCegarLoop]: Abstraction has 149 states and 325 transitions. [2021-06-05 04:36:55,312 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 04:36:55,312 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 325 transitions. [2021-06-05 04:36:55,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:36:55,312 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:36:55,312 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:36:55,512 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 417 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2202 [2021-06-05 04:36:55,513 INFO L430 AbstractCegarLoop]: === Iteration 423 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:36:55,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:36:55,513 INFO L82 PathProgramCache]: Analyzing trace with hash -1439707570, now seen corresponding path program 417 times [2021-06-05 04:36:55,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:36:55,513 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149198832] [2021-06-05 04:36:55,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:36:55,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:36:55,599 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 04:36:55,599 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:36:55,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149198832] [2021-06-05 04:36:55,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149198832] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:55,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914508169] [2021-06-05 04:36:55,599 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 418 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 418 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:36:55,624 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:36:55,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:36:55,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 04:36:55,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:36:55,743 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:36:55,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1914508169] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:55,743 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:36:55,743 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:36:55,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52691974] [2021-06-05 04:36:55,743 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:36:55,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:36:55,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:36:55,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:36:55,743 INFO L87 Difference]: Start difference. First operand 149 states and 325 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:55,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:36:55,904 INFO L93 Difference]: Finished difference Result 156 states and 334 transitions. [2021-06-05 04:36:55,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:36:55,905 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 04:36:55,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:36:55,905 INFO L225 Difference]: With dead ends: 156 [2021-06-05 04:36:55,905 INFO L226 Difference]: Without dead ends: 150 [2021-06-05 04:36:55,905 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 223.8ms TimeCoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:36:55,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-06-05 04:36:55,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 149. [2021-06-05 04:36:55,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 2.189189189189189) internal successors, (324), 148 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:55,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 324 transitions. [2021-06-05 04:36:55,906 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 324 transitions. Word has length 19 [2021-06-05 04:36:55,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:36:55,906 INFO L482 AbstractCegarLoop]: Abstraction has 149 states and 324 transitions. [2021-06-05 04:36:55,906 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 04:36:55,906 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 324 transitions. [2021-06-05 04:36:55,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:36:55,907 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:36:55,907 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:36:56,107 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2204,418 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:36:56,107 INFO L430 AbstractCegarLoop]: === Iteration 424 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:36:56,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:36:56,107 INFO L82 PathProgramCache]: Analyzing trace with hash 208351514, now seen corresponding path program 418 times [2021-06-05 04:36:56,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:36:56,107 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057732802] [2021-06-05 04:36:56,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:36:56,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:36:56,185 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:36:56,186 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:36:56,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057732802] [2021-06-05 04:36:56,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057732802] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:56,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077743672] [2021-06-05 04:36:56,186 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 419 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 419 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:36:56,210 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:36:56,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:36:56,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:36:56,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:36:56,324 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:56,324 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:56,325 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 04:36:56,325 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:56,327 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:56,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:36:56,328 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:56,342 INFO L628 ElimStorePlain]: treesize reduction 29, result has 32.6 percent of original size [2021-06-05 04:36:56,342 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 04:36:56,342 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:36:56,343 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:57, output treesize:6 [2021-06-05 04:36:56,346 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 04:36:56,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1077743672] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:56,346 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:36:56,346 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:36:56,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820361138] [2021-06-05 04:36:56,347 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:36:56,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:36:56,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:36:56,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:36:56,347 INFO L87 Difference]: Start difference. First operand 149 states and 324 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:56,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:36:56,521 INFO L93 Difference]: Finished difference Result 186 states and 398 transitions. [2021-06-05 04:36:56,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:36:56,522 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 04:36:56,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:36:56,522 INFO L225 Difference]: With dead ends: 186 [2021-06-05 04:36:56,522 INFO L226 Difference]: Without dead ends: 186 [2021-06-05 04:36:56,522 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 183.5ms TimeCoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:36:56,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-06-05 04:36:56,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 149. [2021-06-05 04:36:56,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 2.189189189189189) internal successors, (324), 148 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:56,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 324 transitions. [2021-06-05 04:36:56,524 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 324 transitions. Word has length 19 [2021-06-05 04:36:56,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:36:56,524 INFO L482 AbstractCegarLoop]: Abstraction has 149 states and 324 transitions. [2021-06-05 04:36:56,524 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 04:36:56,524 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 324 transitions. [2021-06-05 04:36:56,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:36:56,524 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:36:56,524 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:36:56,724 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 419 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2208 [2021-06-05 04:36:56,724 INFO L430 AbstractCegarLoop]: === Iteration 425 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:36:56,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:36:56,725 INFO L82 PathProgramCache]: Analyzing trace with hash -801633974, now seen corresponding path program 419 times [2021-06-05 04:36:56,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:36:56,725 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87192297] [2021-06-05 04:36:56,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:36:56,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:36:56,799 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:36:56,799 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:36:56,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87192297] [2021-06-05 04:36:56,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87192297] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:56,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2079101110] [2021-06-05 04:36:56,799 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 420 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 420 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:36:56,824 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:36:56,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:36:56,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:36:56,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:36:56,949 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:56,949 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:56,949 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 04:36:56,950 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:56,952 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:56,952 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:56,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:36:56,953 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:56,955 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:56,956 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:56,956 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 16 treesize of output 12 [2021-06-05 04:36:56,956 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:56,958 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:56,959 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 17 treesize of output 13 [2021-06-05 04:36:56,959 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:56,995 INFO L628 ElimStorePlain]: treesize reduction 53, result has 36.9 percent of original size [2021-06-05 04:36:56,995 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 04:36:56,996 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 04:36:56,996 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:121, output treesize:15 [2021-06-05 04:36:57,022 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 04:36:57,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2079101110] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:57,022 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:36:57,022 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:36:57,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442440459] [2021-06-05 04:36:57,022 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:36:57,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:36:57,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:36:57,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:36:57,022 INFO L87 Difference]: Start difference. First operand 149 states and 324 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:57,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:36:57,204 INFO L93 Difference]: Finished difference Result 200 states and 426 transitions. [2021-06-05 04:36:57,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:36:57,204 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 04:36:57,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:36:57,205 INFO L225 Difference]: With dead ends: 200 [2021-06-05 04:36:57,205 INFO L226 Difference]: Without dead ends: 200 [2021-06-05 04:36:57,205 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 212.9ms TimeCoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:36:57,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-06-05 04:36:57,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 150. [2021-06-05 04:36:57,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 2.1879194630872485) internal successors, (326), 149 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:57,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 326 transitions. [2021-06-05 04:36:57,206 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 326 transitions. Word has length 19 [2021-06-05 04:36:57,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:36:57,206 INFO L482 AbstractCegarLoop]: Abstraction has 150 states and 326 transitions. [2021-06-05 04:36:57,206 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 04:36:57,206 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 326 transitions. [2021-06-05 04:36:57,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:36:57,207 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:36:57,207 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:36:57,407 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 420 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2212 [2021-06-05 04:36:57,407 INFO L430 AbstractCegarLoop]: === Iteration 426 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:36:57,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:36:57,407 INFO L82 PathProgramCache]: Analyzing trace with hash 558482766, now seen corresponding path program 420 times [2021-06-05 04:36:57,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:36:57,407 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952138708] [2021-06-05 04:36:57,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:36:57,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:36:57,490 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 04:36:57,490 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:36:57,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952138708] [2021-06-05 04:36:57,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952138708] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:57,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139577659] [2021-06-05 04:36:57,490 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 421 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 421 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:36:57,519 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 04:36:57,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:36:57,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:36:57,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:36:57,647 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:36:57,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [139577659] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:57,647 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:36:57,647 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:36:57,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153419190] [2021-06-05 04:36:57,647 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:36:57,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:36:57,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:36:57,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:36:57,647 INFO L87 Difference]: Start difference. First operand 150 states and 326 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:57,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:36:57,862 INFO L93 Difference]: Finished difference Result 167 states and 361 transitions. [2021-06-05 04:36:57,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:36:57,863 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 04:36:57,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:36:57,863 INFO L225 Difference]: With dead ends: 167 [2021-06-05 04:36:57,863 INFO L226 Difference]: Without dead ends: 167 [2021-06-05 04:36:57,863 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 261.5ms TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:36:57,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-06-05 04:36:57,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 148. [2021-06-05 04:36:57,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 2.1904761904761907) internal successors, (322), 147 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:57,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 322 transitions. [2021-06-05 04:36:57,864 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 322 transitions. Word has length 19 [2021-06-05 04:36:57,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:36:57,865 INFO L482 AbstractCegarLoop]: Abstraction has 148 states and 322 transitions. [2021-06-05 04:36:57,865 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 04:36:57,865 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 322 transitions. [2021-06-05 04:36:57,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:36:57,865 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:36:57,865 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:36:58,065 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 421 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2222 [2021-06-05 04:36:58,065 INFO L430 AbstractCegarLoop]: === Iteration 427 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:36:58,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:36:58,066 INFO L82 PathProgramCache]: Analyzing trace with hash 1386549202, now seen corresponding path program 421 times [2021-06-05 04:36:58,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:36:58,066 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623579163] [2021-06-05 04:36:58,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:36:58,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:36:58,153 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:36:58,153 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:36:58,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623579163] [2021-06-05 04:36:58,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623579163] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:58,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [144519955] [2021-06-05 04:36:58,154 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 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 04:36:58,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:36:58,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:36:58,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:36:58,298 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:58,299 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:58,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:36:58,300 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:58,302 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:58,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:36:58,303 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:58,341 INFO L628 ElimStorePlain]: treesize reduction 68, result has 36.4 percent of original size [2021-06-05 04:36:58,341 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 04:36:58,343 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 8 treesize of output 6 [2021-06-05 04:36:58,343 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:58,355 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:36:58,356 INFO L518 ElimStorePlain]: Eliminatee v_prenex_347 vanished before elimination [2021-06-05 04:36:58,356 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 04:36:58,356 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-06-05 04:36:58,394 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 04:36:58,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [144519955] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:58,394 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:36:58,394 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 04:36:58,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120703916] [2021-06-05 04:36:58,394 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:36:58,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:36:58,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:36:58,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:36:58,394 INFO L87 Difference]: Start difference. First operand 148 states and 322 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:58,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:36:58,736 INFO L93 Difference]: Finished difference Result 181 states and 380 transitions. [2021-06-05 04:36:58,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:36:58,736 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:36:58,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:36:58,736 INFO L225 Difference]: With dead ends: 181 [2021-06-05 04:36:58,736 INFO L226 Difference]: Without dead ends: 181 [2021-06-05 04:36:58,736 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 363.9ms TimeCoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:36:58,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-06-05 04:36:58,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 150. [2021-06-05 04:36:58,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 2.1946308724832213) internal successors, (327), 149 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:58,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 327 transitions. [2021-06-05 04:36:58,738 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 327 transitions. Word has length 19 [2021-06-05 04:36:58,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:36:58,738 INFO L482 AbstractCegarLoop]: Abstraction has 150 states and 327 transitions. [2021-06-05 04:36:58,738 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 04:36:58,738 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 327 transitions. [2021-06-05 04:36:58,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:36:58,738 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:36:58,738 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:36:58,938 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 422 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2232 [2021-06-05 04:36:58,939 INFO L430 AbstractCegarLoop]: === Iteration 428 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:36:58,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:36:58,939 INFO L82 PathProgramCache]: Analyzing trace with hash -898232384, now seen corresponding path program 422 times [2021-06-05 04:36:58,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:36:58,939 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666858786] [2021-06-05 04:36:58,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:36:58,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:36:59,019 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:36:59,019 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:36:59,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666858786] [2021-06-05 04:36:59,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666858786] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:59,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5381679] [2021-06-05 04:36:59,019 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 423 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 423 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:36:59,111 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:36:59,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:36:59,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 04:36:59,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:36:59,220 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:59,221 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:59,221 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 18 treesize of output 14 [2021-06-05 04:36:59,222 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:59,224 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:59,224 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 18 treesize of output 14 [2021-06-05 04:36:59,225 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:59,270 INFO L628 ElimStorePlain]: treesize reduction 72, result has 39.5 percent of original size [2021-06-05 04:36:59,272 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:59,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:36:59,273 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:59,288 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:36:59,290 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:59,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-06-05 04:36:59,292 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:36:59,306 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:36:59,306 INFO L518 ElimStorePlain]: Eliminatee v_prenex_350 vanished before elimination [2021-06-05 04:36:59,308 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 04:36:59,308 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:133, output treesize:22 [2021-06-05 04:36:59,349 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 04:36:59,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [5381679] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:59,349 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:36:59,349 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 04:36:59,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574853975] [2021-06-05 04:36:59,349 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:36:59,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:36:59,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:36:59,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:36:59,350 INFO L87 Difference]: Start difference. First operand 150 states and 327 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:59,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:36:59,718 INFO L93 Difference]: Finished difference Result 227 states and 472 transitions. [2021-06-05 04:36:59,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:36:59,718 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 04:36:59,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:36:59,719 INFO L225 Difference]: With dead ends: 227 [2021-06-05 04:36:59,719 INFO L226 Difference]: Without dead ends: 227 [2021-06-05 04:36:59,719 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 337.4ms TimeCoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:36:59,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2021-06-05 04:36:59,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 151. [2021-06-05 04:36:59,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 2.2133333333333334) internal successors, (332), 150 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:59,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 332 transitions. [2021-06-05 04:36:59,720 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 332 transitions. Word has length 19 [2021-06-05 04:36:59,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:36:59,720 INFO L482 AbstractCegarLoop]: Abstraction has 151 states and 332 transitions. [2021-06-05 04:36:59,721 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 04:36:59,721 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 332 transitions. [2021-06-05 04:36:59,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:36:59,721 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:36:59,721 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:36:59,921 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 423 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2239 [2021-06-05 04:36:59,921 INFO L430 AbstractCegarLoop]: === Iteration 429 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:36:59,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:36:59,921 INFO L82 PathProgramCache]: Analyzing trace with hash 513613948, now seen corresponding path program 423 times [2021-06-05 04:36:59,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:36:59,922 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343121423] [2021-06-05 04:36:59,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:36:59,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:37:00,010 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:37:00,010 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:37:00,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343121423] [2021-06-05 04:37:00,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343121423] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:37:00,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817320906] [2021-06-05 04:37:00,010 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 424 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 424 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:37:00,039 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:37:00,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:37:00,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:37:00,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:37:00,170 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 04:37:00,170 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1817320906] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:37:00,170 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:37:00,170 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:37:00,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414589957] [2021-06-05 04:37:00,170 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:37:00,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:37:00,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:37:00,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:37:00,171 INFO L87 Difference]: Start difference. First operand 151 states and 332 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:37:00,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:37:00,459 INFO L93 Difference]: Finished difference Result 156 states and 338 transitions. [2021-06-05 04:37:00,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:37:00,460 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 04:37:00,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:37:00,460 INFO L225 Difference]: With dead ends: 156 [2021-06-05 04:37:00,460 INFO L226 Difference]: Without dead ends: 152 [2021-06-05 04:37:00,460 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 331.8ms TimeCoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:37:00,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-06-05 04:37:00,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 151. [2021-06-05 04:37:00,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 2.2066666666666666) internal successors, (331), 150 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:37:00,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 331 transitions. [2021-06-05 04:37:00,462 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 331 transitions. Word has length 19 [2021-06-05 04:37:00,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:37:00,462 INFO L482 AbstractCegarLoop]: Abstraction has 151 states and 331 transitions. [2021-06-05 04:37:00,462 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 04:37:00,462 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 331 transitions. [2021-06-05 04:37:00,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:37:00,462 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:37:00,462 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:37:00,662 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 424 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2243 [2021-06-05 04:37:00,662 INFO L430 AbstractCegarLoop]: === Iteration 430 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:37:00,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:37:00,663 INFO L82 PathProgramCache]: Analyzing trace with hash 600495182, now seen corresponding path program 424 times [2021-06-05 04:37:00,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:37:00,663 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394106583] [2021-06-05 04:37:00,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:37:00,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:37:00,733 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:37:00,733 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:37:00,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394106583] [2021-06-05 04:37:00,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394106583] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:37:00,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565385034] [2021-06-05 04:37:00,733 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 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 04:37:00,757 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:37:00,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:37:00,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 04:37:00,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:37:00,874 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:00,874 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:00,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:37:00,875 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:37:00,877 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:00,877 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 17 treesize of output 13 [2021-06-05 04:37:00,878 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:37:00,895 INFO L628 ElimStorePlain]: treesize reduction 28, result has 42.9 percent of original size [2021-06-05 04:37:00,897 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:00,897 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 9 treesize of output 5 [2021-06-05 04:37:00,898 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:37:00,903 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:37:00,904 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 04:37:00,904 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:63, output treesize:9 [2021-06-05 04:37:00,922 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:37:00,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1565385034] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:37:00,922 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:37:00,922 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 04:37:00,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172759157] [2021-06-05 04:37:00,922 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:37:00,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:37:00,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:37:00,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:37:00,923 INFO L87 Difference]: Start difference. First operand 151 states and 331 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:37:01,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:37:01,067 INFO L93 Difference]: Finished difference Result 176 states and 380 transitions. [2021-06-05 04:37:01,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:37:01,068 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 04:37:01,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:37:01,068 INFO L225 Difference]: With dead ends: 176 [2021-06-05 04:37:01,068 INFO L226 Difference]: Without dead ends: 176 [2021-06-05 04:37:01,068 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 202.0ms TimeCoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:37:01,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-06-05 04:37:01,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 147. [2021-06-05 04:37:01,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 146 states have (on average 2.191780821917808) internal successors, (320), 146 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:37:01,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 320 transitions. [2021-06-05 04:37:01,069 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 320 transitions. Word has length 19 [2021-06-05 04:37:01,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:37:01,069 INFO L482 AbstractCegarLoop]: Abstraction has 147 states and 320 transitions. [2021-06-05 04:37:01,070 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 04:37:01,070 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 320 transitions. [2021-06-05 04:37:01,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:37:01,070 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:37:01,070 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:37:01,284 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 425 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2248 [2021-06-05 04:37:01,285 INFO L430 AbstractCegarLoop]: === Iteration 431 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:37:01,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:37:01,285 INFO L82 PathProgramCache]: Analyzing trace with hash 724682390, now seen corresponding path program 425 times [2021-06-05 04:37:01,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:37:01,285 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85569086] [2021-06-05 04:37:01,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:37:01,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:37:01,357 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:37:01,357 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:37:01,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85569086] [2021-06-05 04:37:01,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85569086] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:37:01,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892765824] [2021-06-05 04:37:01,357 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 426 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 426 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:37:01,382 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:37:01,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:37:01,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:37:01,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:37:01,555 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:37:01,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [892765824] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:37:01,555 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:37:01,555 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:37:01,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073694940] [2021-06-05 04:37:01,555 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:37:01,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:37:01,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:37:01,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:37:01,556 INFO L87 Difference]: Start difference. First operand 147 states and 320 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:37:01,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:37:01,871 INFO L93 Difference]: Finished difference Result 205 states and 427 transitions. [2021-06-05 04:37:01,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:37:01,871 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:37:01,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:37:01,871 INFO L225 Difference]: With dead ends: 205 [2021-06-05 04:37:01,871 INFO L226 Difference]: Without dead ends: 202 [2021-06-05 04:37:01,871 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 349.9ms TimeCoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:37:01,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-06-05 04:37:01,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 156. [2021-06-05 04:37:01,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 2.2193548387096773) internal successors, (344), 155 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:37:01,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 344 transitions. [2021-06-05 04:37:01,873 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 344 transitions. Word has length 19 [2021-06-05 04:37:01,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:37:01,873 INFO L482 AbstractCegarLoop]: Abstraction has 156 states and 344 transitions. [2021-06-05 04:37:01,873 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:37:01,873 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 344 transitions. [2021-06-05 04:37:01,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:37:01,873 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:37:01,873 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:37:02,074 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2250,426 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:37:02,074 INFO L430 AbstractCegarLoop]: === Iteration 432 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:37:02,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:37:02,074 INFO L82 PathProgramCache]: Analyzing trace with hash 500750922, now seen corresponding path program 426 times [2021-06-05 04:37:02,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:37:02,074 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271767345] [2021-06-05 04:37:02,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:37:02,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:37:02,161 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:37:02,161 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:37:02,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271767345] [2021-06-05 04:37:02,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271767345] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:37:02,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896417308] [2021-06-05 04:37:02,161 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 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 04:37:02,186 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:37:02,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:37:02,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 04:37:02,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:37:02,333 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:02,334 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:02,334 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 17 treesize of output 13 [2021-06-05 04:37:02,335 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:37:02,337 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:02,337 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 18 treesize of output 14 [2021-06-05 04:37:02,338 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:37:02,384 INFO L628 ElimStorePlain]: treesize reduction 84, result has 35.9 percent of original size [2021-06-05 04:37:02,384 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 04:37:02,386 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 9 treesize of output 7 [2021-06-05 04:37:02,387 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:37:02,402 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:37:02,402 INFO L518 ElimStorePlain]: Eliminatee v_prenex_355 vanished before elimination [2021-06-05 04:37:02,403 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:37:02,403 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:141, output treesize:22 [2021-06-05 04:37:02,448 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:37:02,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [896417308] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:37:02,448 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:37:02,448 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 04:37:02,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11685156] [2021-06-05 04:37:02,448 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:37:02,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:37:02,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:37:02,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:37:02,449 INFO L87 Difference]: Start difference. First operand 156 states and 344 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:37:02,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:37:02,735 INFO L93 Difference]: Finished difference Result 189 states and 400 transitions. [2021-06-05 04:37:02,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:37:02,735 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:37:02,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:37:02,736 INFO L225 Difference]: With dead ends: 189 [2021-06-05 04:37:02,736 INFO L226 Difference]: Without dead ends: 189 [2021-06-05 04:37:02,736 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 272.6ms TimeCoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:37:02,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-06-05 04:37:02,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 156. [2021-06-05 04:37:02,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 2.2193548387096773) internal successors, (344), 155 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:37:02,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 344 transitions. [2021-06-05 04:37:02,737 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 344 transitions. Word has length 19 [2021-06-05 04:37:02,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:37:02,737 INFO L482 AbstractCegarLoop]: Abstraction has 156 states and 344 transitions. [2021-06-05 04:37:02,737 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 04:37:02,737 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 344 transitions. [2021-06-05 04:37:02,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:37:02,737 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:37:02,738 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:37:02,938 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2261,427 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:37:02,938 INFO L430 AbstractCegarLoop]: === Iteration 433 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:37:02,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:37:02,938 INFO L82 PathProgramCache]: Analyzing trace with hash -910039910, now seen corresponding path program 427 times [2021-06-05 04:37:02,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:37:02,938 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173388015] [2021-06-05 04:37:02,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:37:02,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:37:03,028 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:37:03,028 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:37:03,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173388015] [2021-06-05 04:37:03,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173388015] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:37:03,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538929010] [2021-06-05 04:37:03,028 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 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 04:37:03,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:37:03,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:37:03,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:37:03,196 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:03,197 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:03,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:37:03,198 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:37:03,200 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:03,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:37:03,201 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:37:03,239 INFO L628 ElimStorePlain]: treesize reduction 68, result has 36.4 percent of original size [2021-06-05 04:37:03,239 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 04:37:03,241 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 04:37:03,242 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:37:03,254 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:37:03,254 INFO L518 ElimStorePlain]: Eliminatee v_prenex_358 vanished before elimination [2021-06-05 04:37:03,255 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 04:37:03,255 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-06-05 04:37:03,283 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:37:03,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1538929010] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:37:03,283 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:37:03,283 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:37:03,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144990640] [2021-06-05 04:37:03,284 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:37:03,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:37:03,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:37:03,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:37:03,284 INFO L87 Difference]: Start difference. First operand 156 states and 344 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:37:03,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:37:03,779 INFO L93 Difference]: Finished difference Result 187 states and 393 transitions. [2021-06-05 04:37:03,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:37:03,780 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 04:37:03,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:37:03,780 INFO L225 Difference]: With dead ends: 187 [2021-06-05 04:37:03,780 INFO L226 Difference]: Without dead ends: 185 [2021-06-05 04:37:03,780 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 472.4ms TimeCoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:37:03,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2021-06-05 04:37:03,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 156. [2021-06-05 04:37:03,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 2.2129032258064516) internal successors, (343), 155 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:37:03,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 343 transitions. [2021-06-05 04:37:03,781 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 343 transitions. Word has length 19 [2021-06-05 04:37:03,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:37:03,781 INFO L482 AbstractCegarLoop]: Abstraction has 156 states and 343 transitions. [2021-06-05 04:37:03,781 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 04:37:03,782 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 343 transitions. [2021-06-05 04:37:03,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:37:03,782 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:37:03,782 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:37:03,982 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2267,428 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:37:03,982 INFO L430 AbstractCegarLoop]: === Iteration 434 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:37:03,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:37:03,982 INFO L82 PathProgramCache]: Analyzing trace with hash 1860867662, now seen corresponding path program 428 times [2021-06-05 04:37:03,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:37:03,983 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948334692] [2021-06-05 04:37:03,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:37:03,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:37:04,057 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:37:04,057 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:37:04,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948334692] [2021-06-05 04:37:04,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948334692] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:37:04,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [711451242] [2021-06-05 04:37:04,058 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 429 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 429 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:37:04,082 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:37:04,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:37:04,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 04:37:04,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:37:04,211 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:04,212 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:04,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 04:37:04,213 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:37:04,215 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:04,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 04:37:04,216 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:37:04,261 INFO L628 ElimStorePlain]: treesize reduction 72, result has 39.5 percent of original size [2021-06-05 04:37:04,261 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 04:37:04,263 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:04,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:37:04,264 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:37:04,280 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:37:04,282 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:04,282 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 9 treesize of output 5 [2021-06-05 04:37:04,283 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:37:04,297 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:37:04,299 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 04:37:04,299 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:133, output treesize:22 [2021-06-05 04:37:04,344 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 04:37:04,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [711451242] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:37:04,344 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:37:04,344 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 04:37:04,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097528080] [2021-06-05 04:37:04,344 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:37:04,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:37:04,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:37:04,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:37:04,345 INFO L87 Difference]: Start difference. First operand 156 states and 343 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:37:04,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:37:04,735 INFO L93 Difference]: Finished difference Result 221 states and 459 transitions. [2021-06-05 04:37:04,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:37:04,736 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 04:37:04,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:37:04,736 INFO L225 Difference]: With dead ends: 221 [2021-06-05 04:37:04,736 INFO L226 Difference]: Without dead ends: 221 [2021-06-05 04:37:04,736 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 379.3ms TimeCoverageRelationStatistics Valid=85, Invalid=565, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:37:04,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2021-06-05 04:37:04,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 155. [2021-06-05 04:37:04,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 2.2142857142857144) internal successors, (341), 154 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:37:04,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 341 transitions. [2021-06-05 04:37:04,738 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 341 transitions. Word has length 19 [2021-06-05 04:37:04,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:37:04,738 INFO L482 AbstractCegarLoop]: Abstraction has 155 states and 341 transitions. [2021-06-05 04:37:04,738 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 04:37:04,738 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 341 transitions. [2021-06-05 04:37:04,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:37:04,738 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:37:04,738 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:37:04,938 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2275,429 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:37:04,938 INFO L430 AbstractCegarLoop]: === Iteration 435 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:37:04,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:37:04,939 INFO L82 PathProgramCache]: Analyzing trace with hash -372184332, now seen corresponding path program 429 times [2021-06-05 04:37:04,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:37:04,939 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731717747] [2021-06-05 04:37:04,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:37:04,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:37:05,033 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:37:05,033 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:37:05,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731717747] [2021-06-05 04:37:05,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731717747] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:37:05,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662050223] [2021-06-05 04:37:05,033 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 430 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 430 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:37:05,058 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:37:05,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:37:05,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:37:05,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:37:05,232 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 04:37:05,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1662050223] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:37:05,233 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:37:05,233 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:37:05,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584879330] [2021-06-05 04:37:05,233 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:37:05,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:37:05,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:37:05,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:37:05,233 INFO L87 Difference]: Start difference. First operand 155 states and 341 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:37:05,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:37:05,639 INFO L93 Difference]: Finished difference Result 163 states and 351 transitions. [2021-06-05 04:37:05,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:37:05,639 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 04:37:05,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:37:05,639 INFO L225 Difference]: With dead ends: 163 [2021-06-05 04:37:05,639 INFO L226 Difference]: Without dead ends: 159 [2021-06-05 04:37:05,639 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 422.5ms TimeCoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:37:05,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-06-05 04:37:05,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 155. [2021-06-05 04:37:05,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 2.207792207792208) internal successors, (340), 154 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:37:05,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 340 transitions. [2021-06-05 04:37:05,641 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 340 transitions. Word has length 19 [2021-06-05 04:37:05,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:37:05,641 INFO L482 AbstractCegarLoop]: Abstraction has 155 states and 340 transitions. [2021-06-05 04:37:05,641 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 04:37:05,641 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 340 transitions. [2021-06-05 04:37:05,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:37:05,641 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:37:05,641 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:37:05,841 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 430 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2279 [2021-06-05 04:37:05,841 INFO L430 AbstractCegarLoop]: === Iteration 436 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:37:05,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:37:05,842 INFO L82 PathProgramCache]: Analyzing trace with hash -285303098, now seen corresponding path program 430 times [2021-06-05 04:37:05,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:37:05,842 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539991644] [2021-06-05 04:37:05,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:37:05,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:37:05,917 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:37:05,917 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:37:05,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539991644] [2021-06-05 04:37:05,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539991644] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:37:05,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233649541] [2021-06-05 04:37:05,917 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 431 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 431 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:37:05,944 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:37:05,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:37:05,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 04:37:05,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:37:06,080 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:06,081 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:06,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:37:06,081 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:37:06,083 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:06,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:37:06,084 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:37:06,102 INFO L628 ElimStorePlain]: treesize reduction 28, result has 42.9 percent of original size [2021-06-05 04:37:06,103 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:06,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-06-05 04:37:06,105 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:37:06,110 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:37:06,111 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 04:37:06,111 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:63, output treesize:9 [2021-06-05 04:37:06,129 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:37:06,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [233649541] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:37:06,129 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:37:06,129 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 04:37:06,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859780668] [2021-06-05 04:37:06,130 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:37:06,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:37:06,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:37:06,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:37:06,130 INFO L87 Difference]: Start difference. First operand 155 states and 340 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:37:06,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:37:06,510 INFO L93 Difference]: Finished difference Result 193 states and 409 transitions. [2021-06-05 04:37:06,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:37:06,511 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 04:37:06,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:37:06,511 INFO L225 Difference]: With dead ends: 193 [2021-06-05 04:37:06,511 INFO L226 Difference]: Without dead ends: 193 [2021-06-05 04:37:06,511 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 367.8ms TimeCoverageRelationStatistics Valid=99, Invalid=603, Unknown=0, NotChecked=0, Total=702 [2021-06-05 04:37:06,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-06-05 04:37:06,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 154. [2021-06-05 04:37:06,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 2.2091503267973858) internal successors, (338), 153 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:37:06,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 338 transitions. [2021-06-05 04:37:06,512 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 338 transitions. Word has length 19 [2021-06-05 04:37:06,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:37:06,513 INFO L482 AbstractCegarLoop]: Abstraction has 154 states and 338 transitions. [2021-06-05 04:37:06,513 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 04:37:06,513 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 338 transitions. [2021-06-05 04:37:06,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:37:06,513 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:37:06,513 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:37:06,713 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 431 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2284 [2021-06-05 04:37:06,713 INFO L430 AbstractCegarLoop]: === Iteration 437 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:37:06,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:37:06,714 INFO L82 PathProgramCache]: Analyzing trace with hash -878530598, now seen corresponding path program 431 times [2021-06-05 04:37:06,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:37:06,714 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798139697] [2021-06-05 04:37:06,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:37:06,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:37:06,797 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:37:06,797 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:37:06,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798139697] [2021-06-05 04:37:06,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798139697] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:37:06,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911349727] [2021-06-05 04:37:06,798 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 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 04:37:06,823 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:37:06,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:37:06,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:37:06,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:37:06,969 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:37:06,969 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1911349727] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:37:06,969 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:37:06,969 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:37:06,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127531216] [2021-06-05 04:37:06,969 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:37:06,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:37:06,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:37:06,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:37:06,970 INFO L87 Difference]: Start difference. First operand 154 states and 338 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:37:07,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:37:07,219 INFO L93 Difference]: Finished difference Result 160 states and 345 transitions. [2021-06-05 04:37:07,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:37:07,220 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 04:37:07,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:37:07,220 INFO L225 Difference]: With dead ends: 160 [2021-06-05 04:37:07,220 INFO L226 Difference]: Without dead ends: 154 [2021-06-05 04:37:07,220 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 290.2ms TimeCoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:37:07,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-06-05 04:37:07,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 154. [2021-06-05 04:37:07,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 2.2026143790849675) internal successors, (337), 153 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:37:07,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 337 transitions. [2021-06-05 04:37:07,221 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 337 transitions. Word has length 19 [2021-06-05 04:37:07,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:37:07,221 INFO L482 AbstractCegarLoop]: Abstraction has 154 states and 337 transitions. [2021-06-05 04:37:07,221 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 04:37:07,221 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 337 transitions. [2021-06-05 04:37:07,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:37:07,222 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:37:07,222 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:37:07,422 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2286,432 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:37:07,422 INFO L430 AbstractCegarLoop]: === Iteration 438 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:37:07,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:37:07,422 INFO L82 PathProgramCache]: Analyzing trace with hash 1902880078, now seen corresponding path program 432 times [2021-06-05 04:37:07,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:37:07,422 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986410663] [2021-06-05 04:37:07,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:37:07,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:37:07,499 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:37:07,499 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:37:07,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986410663] [2021-06-05 04:37:07,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986410663] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:37:07,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508343442] [2021-06-05 04:37:07,499 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 433 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 433 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:37:07,524 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:37:07,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:37:07,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:37:07,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:37:07,658 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 04:37:07,658 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [508343442] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:37:07,658 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:37:07,658 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:37:07,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513365112] [2021-06-05 04:37:07,658 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:37:07,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:37:07,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:37:07,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:37:07,659 INFO L87 Difference]: Start difference. First operand 154 states and 337 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:37:07,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:37:07,818 INFO L93 Difference]: Finished difference Result 175 states and 373 transitions. [2021-06-05 04:37:07,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:37:07,819 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 04:37:07,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:37:07,819 INFO L225 Difference]: With dead ends: 175 [2021-06-05 04:37:07,819 INFO L226 Difference]: Without dead ends: 175 [2021-06-05 04:37:07,819 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 164.4ms TimeCoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:37:07,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-06-05 04:37:07,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 145. [2021-06-05 04:37:07,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 2.1944444444444446) internal successors, (316), 144 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:37:07,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 316 transitions. [2021-06-05 04:37:07,821 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 316 transitions. Word has length 19 [2021-06-05 04:37:07,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:37:07,821 INFO L482 AbstractCegarLoop]: Abstraction has 145 states and 316 transitions. [2021-06-05 04:37:07,821 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 04:37:07,821 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 316 transitions. [2021-06-05 04:37:07,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:37:07,821 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:37:07,821 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:37:08,021 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2291,433 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:37:08,021 INFO L430 AbstractCegarLoop]: === Iteration 439 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:37:08,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:37:08,022 INFO L82 PathProgramCache]: Analyzing trace with hash -803588398, now seen corresponding path program 433 times [2021-06-05 04:37:08,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:37:08,022 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549474076] [2021-06-05 04:37:08,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:37:08,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:37:08,095 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:37:08,096 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:37:08,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549474076] [2021-06-05 04:37:08,096 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549474076] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:37:08,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051006157] [2021-06-05 04:37:08,096 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 04:37:08,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:37:08,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 04:37:08,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:37:08,232 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:08,232 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:08,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:37:08,233 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:37:08,235 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:08,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:37:08,236 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:37:08,252 INFO L628 ElimStorePlain]: treesize reduction 38, result has 30.9 percent of original size [2021-06-05 04:37:08,252 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 04:37:08,253 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 04:37:08,253 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:67, output treesize:9 [2021-06-05 04:37:08,269 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 04:37:08,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1051006157] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:37:08,270 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:37:08,270 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 04:37:08,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308895848] [2021-06-05 04:37:08,270 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:37:08,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:37:08,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:37:08,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:37:08,270 INFO L87 Difference]: Start difference. First operand 145 states and 316 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:37:08,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:37:08,462 INFO L93 Difference]: Finished difference Result 187 states and 400 transitions. [2021-06-05 04:37:08,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:37:08,462 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:37:08,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:37:08,462 INFO L225 Difference]: With dead ends: 187 [2021-06-05 04:37:08,462 INFO L226 Difference]: Without dead ends: 187 [2021-06-05 04:37:08,462 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 210.0ms TimeCoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:37:08,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-06-05 04:37:08,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 145. [2021-06-05 04:37:08,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 2.1944444444444446) internal successors, (316), 144 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:37:08,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 316 transitions. [2021-06-05 04:37:08,464 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 316 transitions. Word has length 19 [2021-06-05 04:37:08,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:37:08,464 INFO L482 AbstractCegarLoop]: Abstraction has 145 states and 316 transitions. [2021-06-05 04:37:08,464 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 04:37:08,464 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 316 transitions. [2021-06-05 04:37:08,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:37:08,464 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:37:08,464 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:37:08,664 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2295,434 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:37:08,665 INFO L430 AbstractCegarLoop]: === Iteration 440 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:37:08,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:37:08,665 INFO L82 PathProgramCache]: Analyzing trace with hash -2048367454, now seen corresponding path program 434 times [2021-06-05 04:37:08,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:37:08,665 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227194529] [2021-06-05 04:37:08,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:37:08,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:37:08,739 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:37:08,739 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:37:08,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227194529] [2021-06-05 04:37:08,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227194529] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:37:08,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [523265476] [2021-06-05 04:37:08,739 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 435 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 435 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:37:08,763 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:37:08,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:37:08,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 04:37:08,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:37:08,884 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:08,884 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:08,884 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 17 treesize of output 13 [2021-06-05 04:37:08,885 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:37:08,887 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:08,887 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 17 treesize of output 13 [2021-06-05 04:37:08,888 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:37:08,905 INFO L628 ElimStorePlain]: treesize reduction 40, result has 29.8 percent of original size [2021-06-05 04:37:08,905 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 04:37:08,906 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 04:37:08,906 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:67, output treesize:9 [2021-06-05 04:37:08,922 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 04:37:08,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [523265476] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:37:08,923 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:37:08,923 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 04:37:08,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155033615] [2021-06-05 04:37:08,923 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:37:08,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:37:08,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:37:08,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:37:08,923 INFO L87 Difference]: Start difference. First operand 145 states and 316 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:37:09,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:37:09,288 INFO L93 Difference]: Finished difference Result 197 states and 420 transitions. [2021-06-05 04:37:09,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:37:09,289 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:37:09,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:37:09,289 INFO L225 Difference]: With dead ends: 197 [2021-06-05 04:37:09,289 INFO L226 Difference]: Without dead ends: 197 [2021-06-05 04:37:09,289 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 355.6ms TimeCoverageRelationStatistics Valid=105, Invalid=651, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:37:09,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-06-05 04:37:09,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 145. [2021-06-05 04:37:09,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 2.1944444444444446) internal successors, (316), 144 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:37:09,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 316 transitions. [2021-06-05 04:37:09,291 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 316 transitions. Word has length 19 [2021-06-05 04:37:09,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:37:09,291 INFO L482 AbstractCegarLoop]: Abstraction has 145 states and 316 transitions. [2021-06-05 04:37:09,291 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 04:37:09,291 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 316 transitions. [2021-06-05 04:37:09,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:37:09,291 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:37:09,291 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:37:09,491 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2296,435 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:37:09,491 INFO L430 AbstractCegarLoop]: === Iteration 441 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:37:09,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:37:09,492 INFO L82 PathProgramCache]: Analyzing trace with hash 1236614354, now seen corresponding path program 435 times [2021-06-05 04:37:09,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:37:09,492 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925368615] [2021-06-05 04:37:09,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:37:09,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:37:09,568 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:37:09,568 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:37:09,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925368615] [2021-06-05 04:37:09,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925368615] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:37:09,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560214069] [2021-06-05 04:37:09,568 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 436 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 436 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:37:09,594 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 04:37:09,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:37:09,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:37:09,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:37:09,718 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:09,718 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:09,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:37:09,719 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:37:09,721 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:09,722 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:09,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:37:09,723 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:37:09,725 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:09,725 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:09,726 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 16 treesize of output 12 [2021-06-05 04:37:09,726 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:37:09,728 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:09,728 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 04:37:09,729 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:37:09,760 INFO L628 ElimStorePlain]: treesize reduction 53, result has 36.9 percent of original size [2021-06-05 04:37:09,761 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 04:37:09,761 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 04:37:09,761 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:121, output treesize:15 [2021-06-05 04:37:09,799 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 04:37:09,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1560214069] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:37:09,799 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:37:09,799 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 04:37:09,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305698526] [2021-06-05 04:37:09,800 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:37:09,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:37:09,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:37:09,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:37:09,800 INFO L87 Difference]: Start difference. First operand 145 states and 316 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:37:10,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:37:10,397 INFO L93 Difference]: Finished difference Result 219 states and 456 transitions. [2021-06-05 04:37:10,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 04:37:10,398 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:37:10,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:37:10,398 INFO L225 Difference]: With dead ends: 219 [2021-06-05 04:37:10,398 INFO L226 Difference]: Without dead ends: 219 [2021-06-05 04:37:10,398 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 588.3ms TimeCoverageRelationStatistics Valid=141, Invalid=915, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 04:37:10,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2021-06-05 04:37:10,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 145. [2021-06-05 04:37:10,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 2.1944444444444446) internal successors, (316), 144 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:37:10,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 316 transitions. [2021-06-05 04:37:10,400 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 316 transitions. Word has length 19 [2021-06-05 04:37:10,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:37:10,400 INFO L482 AbstractCegarLoop]: Abstraction has 145 states and 316 transitions. [2021-06-05 04:37:10,400 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 04:37:10,400 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 316 transitions. [2021-06-05 04:37:10,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:37:10,400 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:37:10,400 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:37:10,600 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2297,436 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:37:10,600 INFO L430 AbstractCegarLoop]: === Iteration 442 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:37:10,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:37:10,601 INFO L82 PathProgramCache]: Analyzing trace with hash -174176478, now seen corresponding path program 436 times [2021-06-05 04:37:10,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:37:10,601 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999105591] [2021-06-05 04:37:10,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:37:10,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:37:10,673 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:37:10,673 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:37:10,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999105591] [2021-06-05 04:37:10,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999105591] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:37:10,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347686749] [2021-06-05 04:37:10,673 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 437 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 437 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:37:10,697 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:37:10,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:37:10,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 04:37:10,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:37:10,801 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:10,801 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:10,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:37:10,802 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:37:10,804 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:10,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:10,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:37:10,805 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:37:10,808 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:10,808 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:10,808 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 18 treesize of output 14 [2021-06-05 04:37:10,809 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:37:10,811 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:10,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 04:37:10,812 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:37:10,851 INFO L628 ElimStorePlain]: treesize reduction 73, result has 38.7 percent of original size [2021-06-05 04:37:10,853 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:10,853 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 12 treesize of output 8 [2021-06-05 04:37:10,854 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:37:10,870 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:37:10,871 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:37:10,871 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:141, output treesize:22 [2021-06-05 04:37:10,901 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 04:37:10,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [347686749] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:37:10,901 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:37:10,901 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:37:10,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034696400] [2021-06-05 04:37:10,901 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:37:10,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:37:10,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:37:10,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:37:10,902 INFO L87 Difference]: Start difference. First operand 145 states and 316 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:37:11,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:37:11,412 INFO L93 Difference]: Finished difference Result 186 states and 395 transitions. [2021-06-05 04:37:11,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 04:37:11,412 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 04:37:11,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:37:11,412 INFO L225 Difference]: With dead ends: 186 [2021-06-05 04:37:11,412 INFO L226 Difference]: Without dead ends: 184 [2021-06-05 04:37:11,412 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 496.3ms TimeCoverageRelationStatistics Valid=125, Invalid=745, Unknown=0, NotChecked=0, Total=870 [2021-06-05 04:37:11,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-06-05 04:37:11,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 145. [2021-06-05 04:37:11,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 2.1875) internal successors, (315), 144 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:37:11,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 315 transitions. [2021-06-05 04:37:11,414 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 315 transitions. Word has length 19 [2021-06-05 04:37:11,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:37:11,414 INFO L482 AbstractCegarLoop]: Abstraction has 145 states and 315 transitions. [2021-06-05 04:37:11,414 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 04:37:11,414 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 315 transitions. [2021-06-05 04:37:11,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:37:11,414 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:37:11,414 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:37:11,614 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2307,437 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:37:11,615 INFO L430 AbstractCegarLoop]: === Iteration 443 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:37:11,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:37:11,615 INFO L82 PathProgramCache]: Analyzing trace with hash -1698236202, now seen corresponding path program 437 times [2021-06-05 04:37:11,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:37:11,615 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819900034] [2021-06-05 04:37:11,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:37:11,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:37:11,711 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 04:37:11,712 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:37:11,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819900034] [2021-06-05 04:37:11,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819900034] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:37:11,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520758714] [2021-06-05 04:37:11,712 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 438 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 438 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:37:11,737 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:37:11,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:37:11,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:37:11,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:37:11,882 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 04:37:11,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1520758714] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:37:11,883 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:37:11,883 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:37:11,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535388524] [2021-06-05 04:37:11,883 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:37:11,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:37:11,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:37:11,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:37:11,883 INFO L87 Difference]: Start difference. First operand 145 states and 315 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:37:12,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:37:12,248 INFO L93 Difference]: Finished difference Result 168 states and 362 transitions. [2021-06-05 04:37:12,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:37:12,248 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 04:37:12,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:37:12,249 INFO L225 Difference]: With dead ends: 168 [2021-06-05 04:37:12,249 INFO L226 Difference]: Without dead ends: 168 [2021-06-05 04:37:12,249 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 382.7ms TimeCoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:37:12,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-06-05 04:37:12,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 142. [2021-06-05 04:37:12,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 2.1914893617021276) internal successors, (309), 141 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:37:12,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 309 transitions. [2021-06-05 04:37:12,250 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 309 transitions. Word has length 19 [2021-06-05 04:37:12,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:37:12,250 INFO L482 AbstractCegarLoop]: Abstraction has 142 states and 309 transitions. [2021-06-05 04:37:12,250 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 04:37:12,250 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 309 transitions. [2021-06-05 04:37:12,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:37:12,250 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:37:12,250 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:37:12,451 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 438 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2311 [2021-06-05 04:37:12,451 INFO L430 AbstractCegarLoop]: === Iteration 444 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:37:12,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:37:12,451 INFO L82 PathProgramCache]: Analyzing trace with hash 1360801562, now seen corresponding path program 438 times [2021-06-05 04:37:12,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:37:12,451 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985415435] [2021-06-05 04:37:12,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:37:12,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:37:12,527 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:37:12,528 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:37:12,528 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985415435] [2021-06-05 04:37:12,528 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985415435] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:37:12,528 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643369566] [2021-06-05 04:37:12,528 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 439 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 439 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:37:12,553 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:37:12,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:37:12,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:37:12,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:37:12,667 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:12,667 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:12,667 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 16 treesize of output 12 [2021-06-05 04:37:12,668 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:37:12,670 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:12,670 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 15 treesize of output 11 [2021-06-05 04:37:12,671 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:37:12,685 INFO L628 ElimStorePlain]: treesize reduction 29, result has 32.6 percent of original size [2021-06-05 04:37:12,685 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 04:37:12,685 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:37:12,685 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:57, output treesize:6 [2021-06-05 04:37:12,700 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:37:12,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [643369566] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:37:12,700 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:37:12,700 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 04:37:12,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331554946] [2021-06-05 04:37:12,700 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:37:12,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:37:12,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:37:12,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:37:12,701 INFO L87 Difference]: Start difference. First operand 142 states and 309 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:37:12,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:37:12,884 INFO L93 Difference]: Finished difference Result 184 states and 393 transitions. [2021-06-05 04:37:12,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:37:12,884 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:37:12,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:37:12,884 INFO L225 Difference]: With dead ends: 184 [2021-06-05 04:37:12,884 INFO L226 Difference]: Without dead ends: 184 [2021-06-05 04:37:12,884 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 217.4ms TimeCoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:37:12,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-06-05 04:37:12,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 144. [2021-06-05 04:37:12,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 2.1888111888111887) internal successors, (313), 143 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:37:12,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 313 transitions. [2021-06-05 04:37:12,886 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 313 transitions. Word has length 19 [2021-06-05 04:37:12,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:37:12,886 INFO L482 AbstractCegarLoop]: Abstraction has 144 states and 313 transitions. [2021-06-05 04:37:12,886 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 04:37:12,886 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 313 transitions. [2021-06-05 04:37:12,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:37:12,886 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:37:12,886 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:37:13,086 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 439 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2321 [2021-06-05 04:37:13,086 INFO L430 AbstractCegarLoop]: === Iteration 445 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:37:13,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:37:13,087 INFO L82 PathProgramCache]: Analyzing trace with hash 1000885044, now seen corresponding path program 439 times [2021-06-05 04:37:13,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:37:13,087 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055456431] [2021-06-05 04:37:13,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:37:13,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:37:13,163 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:37:13,163 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:37:13,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055456431] [2021-06-05 04:37:13,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055456431] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:37:13,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605029435] [2021-06-05 04:37:13,163 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 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 04:37:13,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:37:13,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:37:13,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:37:13,303 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:13,304 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:13,304 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 04:37:13,305 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:37:13,307 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:13,307 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:13,307 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 17 treesize of output 13 [2021-06-05 04:37:13,308 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:37:13,310 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:13,310 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:13,311 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 04:37:13,311 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:37:13,313 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:13,313 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 16 treesize of output 12 [2021-06-05 04:37:13,314 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:37:13,345 INFO L628 ElimStorePlain]: treesize reduction 53, result has 36.9 percent of original size [2021-06-05 04:37:13,345 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 04:37:13,346 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:37:13,346 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:121, output treesize:15 [2021-06-05 04:37:13,371 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 04:37:13,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [605029435] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:37:13,371 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:37:13,371 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:37:13,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543413567] [2021-06-05 04:37:13,371 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:37:13,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:37:13,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:37:13,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:37:13,372 INFO L87 Difference]: Start difference. First operand 144 states and 313 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:37:13,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:37:13,664 INFO L93 Difference]: Finished difference Result 201 states and 428 transitions. [2021-06-05 04:37:13,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:37:13,664 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 04:37:13,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:37:13,664 INFO L225 Difference]: With dead ends: 201 [2021-06-05 04:37:13,664 INFO L226 Difference]: Without dead ends: 201 [2021-06-05 04:37:13,664 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 306.8ms TimeCoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:37:13,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2021-06-05 04:37:13,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 145. [2021-06-05 04:37:13,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 2.1875) internal successors, (315), 144 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:37:13,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 315 transitions. [2021-06-05 04:37:13,666 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 315 transitions. Word has length 19 [2021-06-05 04:37:13,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:37:13,666 INFO L482 AbstractCegarLoop]: Abstraction has 145 states and 315 transitions. [2021-06-05 04:37:13,666 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 04:37:13,666 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 315 transitions. [2021-06-05 04:37:13,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:37:13,666 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:37:13,666 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:37:13,866 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2325,440 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:37:13,867 INFO L430 AbstractCegarLoop]: === Iteration 446 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:37:13,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:37:13,867 INFO L82 PathProgramCache]: Analyzing trace with hash 1710932814, now seen corresponding path program 440 times [2021-06-05 04:37:13,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:37:13,867 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747770894] [2021-06-05 04:37:13,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:37:13,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:37:13,949 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 04:37:13,949 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:37:13,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747770894] [2021-06-05 04:37:13,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747770894] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:37:13,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452023116] [2021-06-05 04:37:13,949 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 441 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 441 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:37:13,973 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:37:13,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:37:13,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 04:37:13,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:37:14,074 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:14,075 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:14,075 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 17 treesize of output 13 [2021-06-05 04:37:14,076 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:37:14,078 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:14,078 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:14,079 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 18 treesize of output 14 [2021-06-05 04:37:14,079 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:37:14,081 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:14,082 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:14,082 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 18 treesize of output 14 [2021-06-05 04:37:14,083 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:37:14,085 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:14,085 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 17 treesize of output 13 [2021-06-05 04:37:14,085 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:37:14,125 INFO L628 ElimStorePlain]: treesize reduction 65, result has 38.1 percent of original size [2021-06-05 04:37:14,127 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:14,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-06-05 04:37:14,128 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:37:14,144 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:37:14,145 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:37:14,145 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:133, output treesize:22 [2021-06-05 04:37:14,186 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:37:14,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [452023116] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:37:14,187 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:37:14,187 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 04:37:14,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876830742] [2021-06-05 04:37:14,187 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:37:14,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:37:14,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:37:14,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:37:14,187 INFO L87 Difference]: Start difference. First operand 145 states and 315 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:37:14,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:37:14,430 INFO L93 Difference]: Finished difference Result 169 states and 364 transitions. [2021-06-05 04:37:14,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:37:14,431 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 04:37:14,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:37:14,431 INFO L225 Difference]: With dead ends: 169 [2021-06-05 04:37:14,431 INFO L226 Difference]: Without dead ends: 169 [2021-06-05 04:37:14,431 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 276.3ms TimeCoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:37:14,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-06-05 04:37:14,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 143. [2021-06-05 04:37:14,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 2.1901408450704225) internal successors, (311), 142 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:37:14,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 311 transitions. [2021-06-05 04:37:14,432 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 311 transitions. Word has length 19 [2021-06-05 04:37:14,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:37:14,432 INFO L482 AbstractCegarLoop]: Abstraction has 143 states and 311 transitions. [2021-06-05 04:37:14,432 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 04:37:14,432 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 311 transitions. [2021-06-05 04:37:14,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:37:14,433 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:37:14,433 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:37:14,633 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 441 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2335 [2021-06-05 04:37:14,633 INFO L430 AbstractCegarLoop]: === Iteration 447 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:37:14,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:37:14,633 INFO L82 PathProgramCache]: Analyzing trace with hash -1755968046, now seen corresponding path program 441 times [2021-06-05 04:37:14,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:37:14,633 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187475520] [2021-06-05 04:37:14,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:37:14,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:37:14,717 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:37:14,717 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:37:14,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187475520] [2021-06-05 04:37:14,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187475520] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:37:14,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [801045233] [2021-06-05 04:37:14,717 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 04:37:14,746 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 04:37:14,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:37:14,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:37:14,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:37:14,867 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:14,868 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:14,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:37:14,870 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:37:14,873 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:14,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:37:14,874 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:37:14,922 INFO L628 ElimStorePlain]: treesize reduction 60, result has 38.8 percent of original size [2021-06-05 04:37:14,922 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 04:37:14,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index 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 04:37:14,925 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:37:14,940 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:37:14,941 INFO L518 ElimStorePlain]: Eliminatee v_prenex_365 vanished before elimination [2021-06-05 04:37:14,941 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 04:37:14,942 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-06-05 04:37:14,982 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 04:37:14,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [801045233] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:37:14,982 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:37:14,982 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 04:37:14,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234978909] [2021-06-05 04:37:14,982 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:37:14,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:37:14,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:37:14,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:37:14,982 INFO L87 Difference]: Start difference. First operand 143 states and 311 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:37:15,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:37:15,313 INFO L93 Difference]: Finished difference Result 188 states and 393 transitions. [2021-06-05 04:37:15,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:37:15,313 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:37:15,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:37:15,314 INFO L225 Difference]: With dead ends: 188 [2021-06-05 04:37:15,314 INFO L226 Difference]: Without dead ends: 188 [2021-06-05 04:37:15,314 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 342.4ms TimeCoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:37:15,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-06-05 04:37:15,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 145. [2021-06-05 04:37:15,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 2.1944444444444446) internal successors, (316), 144 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:37:15,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 316 transitions. [2021-06-05 04:37:15,315 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 316 transitions. Word has length 19 [2021-06-05 04:37:15,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:37:15,315 INFO L482 AbstractCegarLoop]: Abstraction has 145 states and 316 transitions. [2021-06-05 04:37:15,315 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 04:37:15,315 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 316 transitions. [2021-06-05 04:37:15,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:37:15,316 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:37:15,316 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:37:15,516 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2339,442 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:37:15,516 INFO L430 AbstractCegarLoop]: === Iteration 448 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:37:15,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:37:15,516 INFO L82 PathProgramCache]: Analyzing trace with hash 254217664, now seen corresponding path program 442 times [2021-06-05 04:37:15,516 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:37:15,516 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969431759] [2021-06-05 04:37:15,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:37:15,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:37:15,594 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:37:15,594 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:37:15,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969431759] [2021-06-05 04:37:15,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969431759] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:37:15,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397177688] [2021-06-05 04:37:15,594 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 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 04:37:15,618 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:37:15,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:37:15,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:37:15,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:37:15,792 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 04:37:15,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [397177688] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:37:15,792 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:37:15,792 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 04:37:15,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252866022] [2021-06-05 04:37:15,792 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:37:15,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:37:15,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:37:15,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:37:15,792 INFO L87 Difference]: Start difference. First operand 145 states and 316 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:37:16,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:37:16,129 INFO L93 Difference]: Finished difference Result 227 states and 469 transitions. [2021-06-05 04:37:16,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:37:16,130 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 04:37:16,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:37:16,130 INFO L225 Difference]: With dead ends: 227 [2021-06-05 04:37:16,130 INFO L226 Difference]: Without dead ends: 227 [2021-06-05 04:37:16,130 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 300.7ms TimeCoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:37:16,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2021-06-05 04:37:16,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 146. [2021-06-05 04:37:16,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 2.213793103448276) internal successors, (321), 145 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:37:16,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 321 transitions. [2021-06-05 04:37:16,132 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 321 transitions. Word has length 19 [2021-06-05 04:37:16,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:37:16,132 INFO L482 AbstractCegarLoop]: Abstraction has 146 states and 321 transitions. [2021-06-05 04:37:16,132 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 04:37:16,132 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 321 transitions. [2021-06-05 04:37:16,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:37:16,132 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:37:16,132 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:37:16,332 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 443 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2346 [2021-06-05 04:37:16,332 INFO L430 AbstractCegarLoop]: === Iteration 449 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:37:16,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:37:16,333 INFO L82 PathProgramCache]: Analyzing trace with hash 1666063996, now seen corresponding path program 443 times [2021-06-05 04:37:16,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:37:16,333 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409910701] [2021-06-05 04:37:16,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:37:16,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:37:16,418 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:37:16,418 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:37:16,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409910701] [2021-06-05 04:37:16,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409910701] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:37:16,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510005754] [2021-06-05 04:37:16,418 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 444 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 444 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:37:16,443 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:37:16,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:37:16,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:37:16,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:37:16,580 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 04:37:16,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [510005754] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:37:16,580 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:37:16,580 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:37:16,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415515937] [2021-06-05 04:37:16,580 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:37:16,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:37:16,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:37:16,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:37:16,581 INFO L87 Difference]: Start difference. First operand 146 states and 321 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:37:16,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:37:16,869 INFO L93 Difference]: Finished difference Result 156 states and 337 transitions. [2021-06-05 04:37:16,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:37:16,869 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 04:37:16,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:37:16,870 INFO L225 Difference]: With dead ends: 156 [2021-06-05 04:37:16,870 INFO L226 Difference]: Without dead ends: 152 [2021-06-05 04:37:16,870 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 307.0ms TimeCoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:37:16,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-06-05 04:37:16,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 146. [2021-06-05 04:37:16,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 2.206896551724138) internal successors, (320), 145 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:37:16,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 320 transitions. [2021-06-05 04:37:16,871 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 320 transitions. Word has length 19 [2021-06-05 04:37:16,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:37:16,871 INFO L482 AbstractCegarLoop]: Abstraction has 146 states and 320 transitions. [2021-06-05 04:37:16,871 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 04:37:16,871 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 320 transitions. [2021-06-05 04:37:16,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:37:16,871 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:37:16,871 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:37:17,072 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 444 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2358 [2021-06-05 04:37:17,072 INFO L430 AbstractCegarLoop]: === Iteration 450 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:37:17,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:37:17,072 INFO L82 PathProgramCache]: Analyzing trace with hash 1752945230, now seen corresponding path program 444 times [2021-06-05 04:37:17,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:37:17,072 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821190117] [2021-06-05 04:37:17,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:37:17,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:37:17,147 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:37:17,148 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:37:17,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821190117] [2021-06-05 04:37:17,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821190117] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:37:17,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350121546] [2021-06-05 04:37:17,148 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 445 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 445 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:37:17,173 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 04:37:17,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:37:17,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 04:37:17,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:37:17,291 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:17,291 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:17,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:37:17,292 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:37:17,294 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:17,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:37:17,295 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:37:17,313 INFO L628 ElimStorePlain]: treesize reduction 28, result has 42.9 percent of original size [2021-06-05 04:37:17,315 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:17,315 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 9 treesize of output 5 [2021-06-05 04:37:17,316 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:37:17,321 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:37:17,322 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:37:17,322 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:63, output treesize:9 [2021-06-05 04:37:17,340 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 04:37:17,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [350121546] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:37:17,340 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:37:17,340 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 04:37:17,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680447919] [2021-06-05 04:37:17,341 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:37:17,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:37:17,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:37:17,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:37:17,341 INFO L87 Difference]: Start difference. First operand 146 states and 320 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:37:17,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:37:17,518 INFO L93 Difference]: Finished difference Result 179 states and 383 transitions. [2021-06-05 04:37:17,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:37:17,518 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 04:37:17,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:37:17,519 INFO L225 Difference]: With dead ends: 179 [2021-06-05 04:37:17,519 INFO L226 Difference]: Without dead ends: 179 [2021-06-05 04:37:17,519 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 200.8ms TimeCoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:37:17,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-06-05 04:37:17,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 141. [2021-06-05 04:37:17,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 2.192857142857143) internal successors, (307), 140 states have internal predecessors, (307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:37:17,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 307 transitions. [2021-06-05 04:37:17,520 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 307 transitions. Word has length 19 [2021-06-05 04:37:17,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:37:17,520 INFO L482 AbstractCegarLoop]: Abstraction has 141 states and 307 transitions. [2021-06-05 04:37:17,520 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 04:37:17,520 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 307 transitions. [2021-06-05 04:37:17,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:37:17,520 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:37:17,520 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:37:17,721 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 445 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2364 [2021-06-05 04:37:17,721 INFO L430 AbstractCegarLoop]: === Iteration 451 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:37:17,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:37:17,721 INFO L82 PathProgramCache]: Analyzing trace with hash -329141342, now seen corresponding path program 445 times [2021-06-05 04:37:17,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:37:17,721 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683423200] [2021-06-05 04:37:17,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:37:17,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:37:17,794 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:37:17,794 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:37:17,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683423200] [2021-06-05 04:37:17,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683423200] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:37:17,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758840998] [2021-06-05 04:37:17,794 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 446 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 446 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:37:17,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:37:17,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:37:17,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:37:17,928 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:17,928 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:17,929 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 04:37:17,929 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:37:17,931 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:17,931 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 16 treesize of output 12 [2021-06-05 04:37:17,932 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:37:17,945 INFO L628 ElimStorePlain]: treesize reduction 29, result has 32.6 percent of original size [2021-06-05 04:37:17,945 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 04:37:17,945 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 04:37:17,946 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:57, output treesize:6 [2021-06-05 04:37:17,949 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 04:37:17,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1758840998] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:37:17,949 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:37:17,949 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:37:17,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484131639] [2021-06-05 04:37:17,949 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:37:17,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:37:17,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:37:17,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:37:17,950 INFO L87 Difference]: Start difference. First operand 141 states and 307 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:37:18,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:37:18,095 INFO L93 Difference]: Finished difference Result 173 states and 371 transitions. [2021-06-05 04:37:18,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:37:18,096 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 04:37:18,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:37:18,096 INFO L225 Difference]: With dead ends: 173 [2021-06-05 04:37:18,096 INFO L226 Difference]: Without dead ends: 173 [2021-06-05 04:37:18,096 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 172.3ms TimeCoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:37:18,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-06-05 04:37:18,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 144. [2021-06-05 04:37:18,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 2.1888111888111887) internal successors, (313), 143 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:37:18,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 313 transitions. [2021-06-05 04:37:18,097 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 313 transitions. Word has length 19 [2021-06-05 04:37:18,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:37:18,097 INFO L482 AbstractCegarLoop]: Abstraction has 144 states and 313 transitions. [2021-06-05 04:37:18,098 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 04:37:18,098 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 313 transitions. [2021-06-05 04:37:18,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:37:18,098 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:37:18,098 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:37:18,298 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 446 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2366 [2021-06-05 04:37:18,298 INFO L430 AbstractCegarLoop]: === Iteration 452 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:37:18,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:37:18,298 INFO L82 PathProgramCache]: Analyzing trace with hash -689057860, now seen corresponding path program 446 times [2021-06-05 04:37:18,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:37:18,299 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723072627] [2021-06-05 04:37:18,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:37:18,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:37:18,378 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:37:18,378 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:37:18,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723072627] [2021-06-05 04:37:18,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723072627] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:37:18,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774346909] [2021-06-05 04:37:18,378 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 447 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 447 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:37:18,403 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:37:18,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:37:18,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 04:37:18,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:37:18,496 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:18,497 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:18,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 04:37:18,498 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:37:18,500 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:18,500 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:18,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:37:18,501 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:37:18,503 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:18,504 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:18,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 04:37:18,504 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:37:18,507 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:18,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:37:18,507 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:37:18,549 INFO L628 ElimStorePlain]: treesize reduction 73, result has 38.7 percent of original size [2021-06-05 04:37:18,551 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:18,551 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 12 treesize of output 8 [2021-06-05 04:37:18,552 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:37:18,568 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:37:18,569 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 04:37:18,569 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:141, output treesize:22 [2021-06-05 04:37:18,609 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 04:37:18,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1774346909] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:37:18,609 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:37:18,609 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 04:37:18,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450408909] [2021-06-05 04:37:18,610 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:37:18,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:37:18,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:37:18,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:37:18,610 INFO L87 Difference]: Start difference. First operand 144 states and 313 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:37:18,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:37:18,799 INFO L93 Difference]: Finished difference Result 199 states and 423 transitions. [2021-06-05 04:37:18,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:37:18,799 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 04:37:18,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:37:18,800 INFO L225 Difference]: With dead ends: 199 [2021-06-05 04:37:18,800 INFO L226 Difference]: Without dead ends: 199 [2021-06-05 04:37:18,800 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 186.5ms TimeCoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:37:18,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-06-05 04:37:18,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 145. [2021-06-05 04:37:18,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 2.1875) internal successors, (315), 144 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:37:18,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 315 transitions. [2021-06-05 04:37:18,801 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 315 transitions. Word has length 19 [2021-06-05 04:37:18,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:37:18,801 INFO L482 AbstractCegarLoop]: Abstraction has 145 states and 315 transitions. [2021-06-05 04:37:18,801 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 04:37:18,801 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 315 transitions. [2021-06-05 04:37:18,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:37:18,801 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:37:18,802 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:37:19,002 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 447 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2370 [2021-06-05 04:37:19,002 INFO L430 AbstractCegarLoop]: === Iteration 453 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:37:19,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:37:19,002 INFO L82 PathProgramCache]: Analyzing trace with hash 20989910, now seen corresponding path program 447 times [2021-06-05 04:37:19,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:37:19,002 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157591478] [2021-06-05 04:37:19,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:37:19,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:37:19,085 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 04:37:19,085 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:37:19,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157591478] [2021-06-05 04:37:19,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157591478] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:37:19,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50691252] [2021-06-05 04:37:19,085 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 448 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 448 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:37:19,204 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 04:37:19,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:37:19,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:37:19,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:37:19,337 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:37:19,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [50691252] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:37:19,337 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:37:19,337 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:37:19,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553090039] [2021-06-05 04:37:19,337 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:37:19,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:37:19,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:37:19,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:37:19,338 INFO L87 Difference]: Start difference. First operand 145 states and 315 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:37:19,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:37:19,541 INFO L93 Difference]: Finished difference Result 160 states and 345 transitions. [2021-06-05 04:37:19,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:37:19,542 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 04:37:19,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:37:19,542 INFO L225 Difference]: With dead ends: 160 [2021-06-05 04:37:19,542 INFO L226 Difference]: Without dead ends: 160 [2021-06-05 04:37:19,542 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 221.8ms TimeCoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:37:19,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-06-05 04:37:19,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 143. [2021-06-05 04:37:19,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 2.1901408450704225) internal successors, (311), 142 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:37:19,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 311 transitions. [2021-06-05 04:37:19,544 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 311 transitions. Word has length 19 [2021-06-05 04:37:19,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:37:19,544 INFO L482 AbstractCegarLoop]: Abstraction has 143 states and 311 transitions. [2021-06-05 04:37:19,544 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 04:37:19,544 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 311 transitions. [2021-06-05 04:37:19,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:37:19,544 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:37:19,544 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:37:19,744 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2373,448 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:37:19,744 INFO L430 AbstractCegarLoop]: === Iteration 454 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:37:19,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:37:19,745 INFO L82 PathProgramCache]: Analyzing trace with hash 1499125316, now seen corresponding path program 448 times [2021-06-05 04:37:19,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:37:19,745 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596730091] [2021-06-05 04:37:19,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:37:19,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:37:19,827 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:37:19,827 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:37:19,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596730091] [2021-06-05 04:37:19,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596730091] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:37:19,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1586524979] [2021-06-05 04:37:19,828 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 449 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 449 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:37:19,851 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:37:19,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:37:19,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:37:19,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:37:19,969 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:19,970 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:19,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:37:19,971 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:37:19,973 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:19,973 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 16 treesize of output 12 [2021-06-05 04:37:19,974 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:37:20,012 INFO L628 ElimStorePlain]: treesize reduction 68, result has 36.4 percent of original size [2021-06-05 04:37:20,012 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 04:37:20,014 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 8 treesize of output 6 [2021-06-05 04:37:20,014 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:37:20,027 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:37:20,027 INFO L518 ElimStorePlain]: Eliminatee v_prenex_368 vanished before elimination [2021-06-05 04:37:20,027 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 04:37:20,028 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-06-05 04:37:20,052 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:37:20,052 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1586524979] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:37:20,052 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:37:20,052 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:37:20,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211259595] [2021-06-05 04:37:20,052 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:37:20,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:37:20,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:37:20,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:37:20,053 INFO L87 Difference]: Start difference. First operand 143 states and 311 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:37:20,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:37:20,330 INFO L93 Difference]: Finished difference Result 180 states and 378 transitions. [2021-06-05 04:37:20,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:37:20,330 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 04:37:20,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:37:20,331 INFO L225 Difference]: With dead ends: 180 [2021-06-05 04:37:20,331 INFO L226 Difference]: Without dead ends: 180 [2021-06-05 04:37:20,331 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 311.8ms TimeCoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:37:20,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2021-06-05 04:37:20,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 145. [2021-06-05 04:37:20,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 2.1944444444444446) internal successors, (316), 144 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:37:20,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 316 transitions. [2021-06-05 04:37:20,332 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 316 transitions. Word has length 19 [2021-06-05 04:37:20,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:37:20,332 INFO L482 AbstractCegarLoop]: Abstraction has 145 states and 316 transitions. [2021-06-05 04:37:20,332 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 04:37:20,332 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 316 transitions. [2021-06-05 04:37:20,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:37:20,332 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:37:20,333 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:37:20,533 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2383,449 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:37:20,533 INFO L430 AbstractCegarLoop]: === Iteration 455 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:37:20,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:37:20,533 INFO L82 PathProgramCache]: Analyzing trace with hash -1435725240, now seen corresponding path program 449 times [2021-06-05 04:37:20,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:37:20,533 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197602857] [2021-06-05 04:37:20,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:37:20,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:37:20,612 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:37:20,612 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:37:20,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197602857] [2021-06-05 04:37:20,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197602857] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:37:20,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573035887] [2021-06-05 04:37:20,613 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 450 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 450 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:37:20,638 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:37:20,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:37:20,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:37:20,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:37:20,794 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:37:20,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [573035887] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:37:20,795 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:37:20,795 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 04:37:20,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654488252] [2021-06-05 04:37:20,795 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:37:20,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:37:20,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:37:20,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:37:20,795 INFO L87 Difference]: Start difference. First operand 145 states and 316 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:37:21,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:37:21,094 INFO L93 Difference]: Finished difference Result 211 states and 436 transitions. [2021-06-05 04:37:21,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:37:21,094 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 04:37:21,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:37:21,094 INFO L225 Difference]: With dead ends: 211 [2021-06-05 04:37:21,094 INFO L226 Difference]: Without dead ends: 211 [2021-06-05 04:37:21,094 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 353.4ms TimeCoverageRelationStatistics Valid=103, Invalid=599, Unknown=0, NotChecked=0, Total=702 [2021-06-05 04:37:21,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-06-05 04:37:21,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 146. [2021-06-05 04:37:21,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 2.213793103448276) internal successors, (321), 145 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:37:21,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 321 transitions. [2021-06-05 04:37:21,096 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 321 transitions. Word has length 19 [2021-06-05 04:37:21,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:37:21,096 INFO L482 AbstractCegarLoop]: Abstraction has 146 states and 321 transitions. [2021-06-05 04:37:21,096 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 04:37:21,096 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 321 transitions. [2021-06-05 04:37:21,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:37:21,096 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:37:21,096 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:37:21,296 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2390,450 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:37:21,296 INFO L430 AbstractCegarLoop]: === Iteration 456 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:37:21,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:37:21,297 INFO L82 PathProgramCache]: Analyzing trace with hash -23878908, now seen corresponding path program 450 times [2021-06-05 04:37:21,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:37:21,297 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632173014] [2021-06-05 04:37:21,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:37:21,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:37:21,383 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 04:37:21,383 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:37:21,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632173014] [2021-06-05 04:37:21,384 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632173014] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:37:21,384 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346028849] [2021-06-05 04:37:21,384 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 451 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 451 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:37:21,408 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:37:21,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:37:21,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 04:37:21,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:37:21,542 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:37:21,542 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1346028849] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:37:21,542 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:37:21,542 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:37:21,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119249592] [2021-06-05 04:37:21,542 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:37:21,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:37:21,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:37:21,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:37:21,543 INFO L87 Difference]: Start difference. First operand 146 states and 321 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:37:21,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:37:21,743 INFO L93 Difference]: Finished difference Result 150 states and 325 transitions. [2021-06-05 04:37:21,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:37:21,743 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 04:37:21,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:37:21,743 INFO L225 Difference]: With dead ends: 150 [2021-06-05 04:37:21,744 INFO L226 Difference]: Without dead ends: 146 [2021-06-05 04:37:21,744 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 261.7ms TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:37:21,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-06-05 04:37:21,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 146. [2021-06-05 04:37:21,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 2.206896551724138) internal successors, (320), 145 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:37:21,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 320 transitions. [2021-06-05 04:37:21,745 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 320 transitions. Word has length 19 [2021-06-05 04:37:21,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:37:21,745 INFO L482 AbstractCegarLoop]: Abstraction has 146 states and 320 transitions. [2021-06-05 04:37:21,745 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 04:37:21,745 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 320 transitions. [2021-06-05 04:37:21,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:37:21,745 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:37:21,745 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:37:21,945 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 451 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2400 [2021-06-05 04:37:21,946 INFO L430 AbstractCegarLoop]: === Iteration 457 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:37:21,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:37:21,946 INFO L82 PathProgramCache]: Analyzing trace with hash 63002326, now seen corresponding path program 451 times [2021-06-05 04:37:21,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:37:21,946 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361876117] [2021-06-05 04:37:21,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:37:21,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:37:22,024 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:37:22,024 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:37:22,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361876117] [2021-06-05 04:37:22,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361876117] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:37:22,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452375679] [2021-06-05 04:37:22,025 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 04:37:22,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:37:22,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 04:37:22,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:37:22,171 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:22,172 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:22,172 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 17 treesize of output 13 [2021-06-05 04:37:22,173 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:37:22,174 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:22,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:37:22,175 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:37:22,193 INFO L628 ElimStorePlain]: treesize reduction 28, result has 42.9 percent of original size [2021-06-05 04:37:22,194 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:22,195 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 9 treesize of output 5 [2021-06-05 04:37:22,196 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:37:22,201 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:37:22,202 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:37:22,202 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:63, output treesize:9 [2021-06-05 04:37:22,219 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 04:37:22,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1452375679] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:37:22,220 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:37:22,220 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 04:37:22,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915931855] [2021-06-05 04:37:22,220 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:37:22,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:37:22,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:37:22,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:37:22,220 INFO L87 Difference]: Start difference. First operand 146 states and 320 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:37:22,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:37:22,411 INFO L93 Difference]: Finished difference Result 168 states and 361 transitions. [2021-06-05 04:37:22,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:37:22,412 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 04:37:22,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:37:22,412 INFO L225 Difference]: With dead ends: 168 [2021-06-05 04:37:22,412 INFO L226 Difference]: Without dead ends: 168 [2021-06-05 04:37:22,412 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 205.8ms TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:37:22,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-06-05 04:37:22,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 142. [2021-06-05 04:37:22,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 2.1914893617021276) internal successors, (309), 141 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:37:22,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 309 transitions. [2021-06-05 04:37:22,413 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 309 transitions. Word has length 19 [2021-06-05 04:37:22,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:37:22,414 INFO L482 AbstractCegarLoop]: Abstraction has 142 states and 309 transitions. [2021-06-05 04:37:22,414 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:37:22,414 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 309 transitions. [2021-06-05 04:37:22,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:37:22,414 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:37:22,414 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:37:22,614 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 452 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2405 [2021-06-05 04:37:22,614 INFO L430 AbstractCegarLoop]: === Iteration 458 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:37:22,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:37:22,614 INFO L82 PathProgramCache]: Analyzing trace with hash -36741934, now seen corresponding path program 452 times [2021-06-05 04:37:22,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:37:22,615 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481617416] [2021-06-05 04:37:22,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:37:22,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:37:22,700 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:37:22,700 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:37:22,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481617416] [2021-06-05 04:37:22,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481617416] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:37:22,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [711247890] [2021-06-05 04:37:22,700 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 453 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 453 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:37:22,724 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:37:22,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:37:22,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 04:37:22,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:37:22,869 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:22,870 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:22,870 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 18 treesize of output 14 [2021-06-05 04:37:22,871 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:37:22,874 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:22,875 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 17 treesize of output 13 [2021-06-05 04:37:22,875 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:37:22,927 INFO L628 ElimStorePlain]: treesize reduction 80, result has 38.9 percent of original size [2021-06-05 04:37:22,927 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 04:37:22,929 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:22,929 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 18 treesize of output 14 [2021-06-05 04:37:22,930 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:37:22,946 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:37:22,948 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:22,948 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 12 treesize of output 8 [2021-06-05 04:37:22,949 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:37:22,964 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:37:22,964 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 04:37:22,965 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:141, output treesize:22 [2021-06-05 04:37:23,009 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 04:37:23,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [711247890] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:37:23,009 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:37:23,009 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 04:37:23,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801796817] [2021-06-05 04:37:23,009 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:37:23,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:37:23,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:37:23,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:37:23,010 INFO L87 Difference]: Start difference. First operand 142 states and 309 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:37:23,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:37:23,240 INFO L93 Difference]: Finished difference Result 184 states and 385 transitions. [2021-06-05 04:37:23,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:37:23,240 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:37:23,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:37:23,241 INFO L225 Difference]: With dead ends: 184 [2021-06-05 04:37:23,241 INFO L226 Difference]: Without dead ends: 184 [2021-06-05 04:37:23,241 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 283.1ms TimeCoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:37:23,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-06-05 04:37:23,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 144. [2021-06-05 04:37:23,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 2.202797202797203) internal successors, (315), 143 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:37:23,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 315 transitions. [2021-06-05 04:37:23,242 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 315 transitions. Word has length 19 [2021-06-05 04:37:23,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:37:23,242 INFO L482 AbstractCegarLoop]: Abstraction has 144 states and 315 transitions. [2021-06-05 04:37:23,242 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 04:37:23,242 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 315 transitions. [2021-06-05 04:37:23,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:37:23,243 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:37:23,243 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:37:23,443 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2407,453 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:37:23,443 INFO L430 AbstractCegarLoop]: === Iteration 459 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:37:23,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:37:23,443 INFO L82 PathProgramCache]: Analyzing trace with hash -909677188, now seen corresponding path program 453 times [2021-06-05 04:37:23,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:37:23,443 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7239570] [2021-06-05 04:37:23,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:37:23,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:37:23,526 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 04:37:23,526 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:37:23,526 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7239570] [2021-06-05 04:37:23,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7239570] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:37:23,526 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1850012182] [2021-06-05 04:37:23,526 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 454 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 454 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:37:23,552 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:37:23,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:37:23,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:37:23,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:37:23,707 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:37:23,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1850012182] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:37:23,708 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:37:23,708 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:37:23,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75072599] [2021-06-05 04:37:23,708 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:37:23,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:37:23,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:37:23,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:37:23,708 INFO L87 Difference]: Start difference. First operand 144 states and 315 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:37:24,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:37:24,083 INFO L93 Difference]: Finished difference Result 152 states and 325 transitions. [2021-06-05 04:37:24,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:37:24,083 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 04:37:24,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:37:24,084 INFO L225 Difference]: With dead ends: 152 [2021-06-05 04:37:24,084 INFO L226 Difference]: Without dead ends: 148 [2021-06-05 04:37:24,084 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 409.3ms TimeCoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:37:24,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-06-05 04:37:24,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 144. [2021-06-05 04:37:24,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 2.195804195804196) internal successors, (314), 143 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:37:24,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 314 transitions. [2021-06-05 04:37:24,086 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 314 transitions. Word has length 19 [2021-06-05 04:37:24,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:37:24,086 INFO L482 AbstractCegarLoop]: Abstraction has 144 states and 314 transitions. [2021-06-05 04:37:24,086 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 04:37:24,086 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 314 transitions. [2021-06-05 04:37:24,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:37:24,086 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:37:24,086 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:37:24,304 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 454 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2413 [2021-06-05 04:37:24,305 INFO L430 AbstractCegarLoop]: === Iteration 460 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:37:24,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:37:24,305 INFO L82 PathProgramCache]: Analyzing trace with hash -822795954, now seen corresponding path program 454 times [2021-06-05 04:37:24,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:37:24,305 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171971279] [2021-06-05 04:37:24,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:37:24,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:37:24,377 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 04:37:24,378 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:37:24,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171971279] [2021-06-05 04:37:24,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171971279] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:37:24,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516939090] [2021-06-05 04:37:24,378 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 455 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 455 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:37:24,402 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:37:24,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:37:24,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 04:37:24,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:37:24,534 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:24,534 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:24,535 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 17 treesize of output 13 [2021-06-05 04:37:24,535 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:37:24,537 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:24,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:37:24,538 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:37:24,556 INFO L628 ElimStorePlain]: treesize reduction 28, result has 42.9 percent of original size [2021-06-05 04:37:24,557 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:24,557 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 9 treesize of output 5 [2021-06-05 04:37:24,559 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:37:24,564 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:37:24,564 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 04:37:24,564 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:63, output treesize:9 [2021-06-05 04:37:24,582 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:37:24,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [516939090] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:37:24,583 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:37:24,583 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 04:37:24,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850807739] [2021-06-05 04:37:24,583 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:37:24,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:37:24,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:37:24,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:37:24,583 INFO L87 Difference]: Start difference. First operand 144 states and 314 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:37:24,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:37:24,956 INFO L93 Difference]: Finished difference Result 184 states and 389 transitions. [2021-06-05 04:37:24,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:37:24,956 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 04:37:24,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:37:24,956 INFO L225 Difference]: With dead ends: 184 [2021-06-05 04:37:24,956 INFO L226 Difference]: Without dead ends: 184 [2021-06-05 04:37:24,956 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 362.7ms TimeCoverageRelationStatistics Valid=101, Invalid=601, Unknown=0, NotChecked=0, Total=702 [2021-06-05 04:37:24,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-06-05 04:37:24,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 145. [2021-06-05 04:37:24,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 2.2083333333333335) internal successors, (318), 144 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:37:24,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 318 transitions. [2021-06-05 04:37:24,958 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 318 transitions. Word has length 19 [2021-06-05 04:37:24,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:37:24,958 INFO L482 AbstractCegarLoop]: Abstraction has 145 states and 318 transitions. [2021-06-05 04:37:24,958 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 04:37:24,958 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 318 transitions. [2021-06-05 04:37:24,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:37:24,958 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:37:24,958 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:37:25,158 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 455 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2418 [2021-06-05 04:37:25,159 INFO L430 AbstractCegarLoop]: === Iteration 461 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:37:25,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:37:25,159 INFO L82 PathProgramCache]: Analyzing trace with hash -1416023454, now seen corresponding path program 455 times [2021-06-05 04:37:25,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:37:25,159 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561111080] [2021-06-05 04:37:25,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:37:25,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:37:25,231 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:37:25,231 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:37:25,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561111080] [2021-06-05 04:37:25,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561111080] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:37:25,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387530540] [2021-06-05 04:37:25,232 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 456 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 456 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:37:25,256 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:37:25,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:37:25,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:37:25,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:37:25,398 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 04:37:25,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1387530540] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:37:25,399 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:37:25,399 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:37:25,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652061275] [2021-06-05 04:37:25,399 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:37:25,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:37:25,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:37:25,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:37:25,399 INFO L87 Difference]: Start difference. First operand 145 states and 318 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:37:25,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:37:25,641 INFO L93 Difference]: Finished difference Result 151 states and 325 transitions. [2021-06-05 04:37:25,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:37:25,641 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 04:37:25,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:37:25,642 INFO L225 Difference]: With dead ends: 151 [2021-06-05 04:37:25,642 INFO L226 Difference]: Without dead ends: 145 [2021-06-05 04:37:25,642 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 275.1ms TimeCoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:37:25,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-06-05 04:37:25,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2021-06-05 04:37:25,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 2.201388888888889) internal successors, (317), 144 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:37:25,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 317 transitions. [2021-06-05 04:37:25,643 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 317 transitions. Word has length 19 [2021-06-05 04:37:25,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:37:25,643 INFO L482 AbstractCegarLoop]: Abstraction has 145 states and 317 transitions. [2021-06-05 04:37:25,643 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 04:37:25,643 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 317 transitions. [2021-06-05 04:37:25,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:37:25,643 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:37:25,643 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:37:25,844 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 456 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2420 [2021-06-05 04:37:25,844 INFO L430 AbstractCegarLoop]: === Iteration 462 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:37:25,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:37:25,844 INFO L82 PathProgramCache]: Analyzing trace with hash 1365387222, now seen corresponding path program 456 times [2021-06-05 04:37:25,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:37:25,844 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44167889] [2021-06-05 04:37:25,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:37:25,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:37:25,923 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:37:25,923 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:37:25,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44167889] [2021-06-05 04:37:25,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44167889] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:37:25,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801354566] [2021-06-05 04:37:25,923 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 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 04:37:25,949 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:37:25,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:37:25,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 04:37:25,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:37:26,070 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:26,071 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:26,071 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 17 treesize of output 13 [2021-06-05 04:37:26,072 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:37:26,073 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:26,074 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 17 treesize of output 13 [2021-06-05 04:37:26,074 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:37:26,092 INFO L628 ElimStorePlain]: treesize reduction 28, result has 42.9 percent of original size [2021-06-05 04:37:26,094 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:26,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-06-05 04:37:26,095 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:37:26,100 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:37:26,101 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 04:37:26,101 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:63, output treesize:9 [2021-06-05 04:37:26,119 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:37:26,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1801354566] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:37:26,119 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:37:26,119 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 04:37:26,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558900011] [2021-06-05 04:37:26,120 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:37:26,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:37:26,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:37:26,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:37:26,120 INFO L87 Difference]: Start difference. First operand 145 states and 317 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:37:26,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:37:26,308 INFO L93 Difference]: Finished difference Result 170 states and 362 transitions. [2021-06-05 04:37:26,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:37:26,308 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 04:37:26,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:37:26,308 INFO L225 Difference]: With dead ends: 170 [2021-06-05 04:37:26,308 INFO L226 Difference]: Without dead ends: 170 [2021-06-05 04:37:26,308 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 171.6ms TimeCoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:37:26,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-06-05 04:37:26,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 143. [2021-06-05 04:37:26,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 2.1901408450704225) internal successors, (311), 142 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:37:26,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 311 transitions. [2021-06-05 04:37:26,310 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 311 transitions. Word has length 19 [2021-06-05 04:37:26,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:37:26,310 INFO L482 AbstractCegarLoop]: Abstraction has 143 states and 311 transitions. [2021-06-05 04:37:26,310 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 04:37:26,310 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 311 transitions. [2021-06-05 04:37:26,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:37:26,310 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:37:26,310 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:37:26,510 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 457 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2425 [2021-06-05 04:37:26,511 INFO L430 AbstractCegarLoop]: === Iteration 463 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:37:26,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:37:26,511 INFO L82 PathProgramCache]: Analyzing trace with hash -1177763814, now seen corresponding path program 457 times [2021-06-05 04:37:26,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:37:26,511 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071282710] [2021-06-05 04:37:26,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:37:26,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:37:26,591 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:37:26,591 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:37:26,591 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071282710] [2021-06-05 04:37:26,591 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071282710] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:37:26,591 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811552241] [2021-06-05 04:37:26,591 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 458 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 458 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:37:26,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:37:26,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:37:26,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:37:26,775 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:26,776 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:26,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:37:26,777 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:37:26,779 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:26,779 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 16 treesize of output 12 [2021-06-05 04:37:26,779 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:37:26,794 INFO L628 ElimStorePlain]: treesize reduction 29, result has 32.6 percent of original size [2021-06-05 04:37:26,794 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 04:37:26,794 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 04:37:26,794 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:57, output treesize:6 [2021-06-05 04:37:26,809 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:37:26,809 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [811552241] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:37:26,809 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:37:26,809 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 04:37:26,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868961792] [2021-06-05 04:37:26,809 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:37:26,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:37:26,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:37:26,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:37:26,810 INFO L87 Difference]: Start difference. First operand 143 states and 311 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:37:26,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:37:26,978 INFO L93 Difference]: Finished difference Result 174 states and 373 transitions. [2021-06-05 04:37:26,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:37:26,979 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:37:26,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:37:26,979 INFO L225 Difference]: With dead ends: 174 [2021-06-05 04:37:26,979 INFO L226 Difference]: Without dead ends: 174 [2021-06-05 04:37:26,979 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 204.1ms TimeCoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:37:26,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-06-05 04:37:26,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 145. [2021-06-05 04:37:26,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 2.1875) internal successors, (315), 144 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:37:26,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 315 transitions. [2021-06-05 04:37:26,980 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 315 transitions. Word has length 19 [2021-06-05 04:37:26,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:37:26,980 INFO L482 AbstractCegarLoop]: Abstraction has 145 states and 315 transitions. [2021-06-05 04:37:26,981 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 04:37:26,981 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 315 transitions. [2021-06-05 04:37:26,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:37:26,981 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:37:26,981 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:37:27,181 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2427,458 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:37:27,181 INFO L430 AbstractCegarLoop]: === Iteration 464 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:37:27,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:37:27,181 INFO L82 PathProgramCache]: Analyzing trace with hash -1537680332, now seen corresponding path program 458 times [2021-06-05 04:37:27,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:37:27,182 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803274022] [2021-06-05 04:37:27,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:37:27,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:37:27,254 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 04:37:27,254 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:37:27,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803274022] [2021-06-05 04:37:27,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803274022] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:37:27,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218805124] [2021-06-05 04:37:27,254 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 459 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 459 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:37:27,278 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:37:27,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:37:27,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 04:37:27,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:37:27,375 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:27,375 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:27,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:37:27,376 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:37:27,378 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:27,379 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:27,379 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 17 treesize of output 13 [2021-06-05 04:37:27,380 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:37:27,382 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:27,382 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:27,382 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 18 treesize of output 14 [2021-06-05 04:37:27,383 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:37:27,385 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:27,385 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 18 treesize of output 14 [2021-06-05 04:37:27,386 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:37:27,426 INFO L628 ElimStorePlain]: treesize reduction 73, result has 38.7 percent of original size [2021-06-05 04:37:27,428 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:27,429 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 12 treesize of output 8 [2021-06-05 04:37:27,430 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:37:27,446 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:37:27,447 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 04:37:27,447 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:141, output treesize:22 [2021-06-05 04:37:27,488 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:37:27,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1218805124] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:37:27,488 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:37:27,488 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 04:37:27,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063007346] [2021-06-05 04:37:27,488 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:37:27,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:37:27,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:37:27,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:37:27,489 INFO L87 Difference]: Start difference. First operand 145 states and 315 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:37:27,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:37:27,624 INFO L93 Difference]: Finished difference Result 200 states and 425 transitions. [2021-06-05 04:37:27,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:37:27,625 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 04:37:27,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:37:27,625 INFO L225 Difference]: With dead ends: 200 [2021-06-05 04:37:27,625 INFO L226 Difference]: Without dead ends: 200 [2021-06-05 04:37:27,625 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 182.2ms TimeCoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:37:27,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-06-05 04:37:27,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 146. [2021-06-05 04:37:27,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 2.1862068965517243) internal successors, (317), 145 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:37:27,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 317 transitions. [2021-06-05 04:37:27,626 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 317 transitions. Word has length 19 [2021-06-05 04:37:27,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:37:27,627 INFO L482 AbstractCegarLoop]: Abstraction has 146 states and 317 transitions. [2021-06-05 04:37:27,627 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 04:37:27,627 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 317 transitions. [2021-06-05 04:37:27,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:37:27,627 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:37:27,627 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:37:27,827 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2431,459 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:37:27,827 INFO L430 AbstractCegarLoop]: === Iteration 465 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:37:27,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:37:27,827 INFO L82 PathProgramCache]: Analyzing trace with hash -827632562, now seen corresponding path program 459 times [2021-06-05 04:37:27,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:37:27,828 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652300472] [2021-06-05 04:37:27,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:37:27,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:37:27,914 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:37:27,914 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:37:27,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652300472] [2021-06-05 04:37:27,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652300472] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:37:27,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260842899] [2021-06-05 04:37:27,914 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 460 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 460 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:37:27,939 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:37:27,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:37:27,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:37:27,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:37:28,068 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 04:37:28,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1260842899] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:37:28,068 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:37:28,068 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:37:28,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345538233] [2021-06-05 04:37:28,068 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:37:28,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:37:28,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:37:28,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:37:28,069 INFO L87 Difference]: Start difference. First operand 146 states and 317 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:37:28,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:37:28,293 INFO L93 Difference]: Finished difference Result 161 states and 347 transitions. [2021-06-05 04:37:28,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:37:28,293 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 04:37:28,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:37:28,294 INFO L225 Difference]: With dead ends: 161 [2021-06-05 04:37:28,294 INFO L226 Difference]: Without dead ends: 161 [2021-06-05 04:37:28,294 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 226.0ms TimeCoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:37:28,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-06-05 04:37:28,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 144. [2021-06-05 04:37:28,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 2.1888111888111887) internal successors, (313), 143 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:37:28,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 313 transitions. [2021-06-05 04:37:28,295 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 313 transitions. Word has length 19 [2021-06-05 04:37:28,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:37:28,295 INFO L482 AbstractCegarLoop]: Abstraction has 144 states and 313 transitions. [2021-06-05 04:37:28,295 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 04:37:28,295 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 313 transitions. [2021-06-05 04:37:28,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:37:28,295 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:37:28,295 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:37:28,496 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2434,460 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:37:28,496 INFO L430 AbstractCegarLoop]: === Iteration 466 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:37:28,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:37:28,496 INFO L82 PathProgramCache]: Analyzing trace with hash 650502844, now seen corresponding path program 460 times [2021-06-05 04:37:28,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:37:28,496 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885784902] [2021-06-05 04:37:28,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:37:28,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:37:28,588 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:37:28,588 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:37:28,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885784902] [2021-06-05 04:37:28,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885784902] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:37:28,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661964456] [2021-06-05 04:37:28,589 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 461 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 461 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:37:28,613 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:37:28,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:37:28,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:37:28,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:37:28,732 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:28,733 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:28,733 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 15 treesize of output 11 [2021-06-05 04:37:28,733 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:37:28,736 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:28,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:37:28,736 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:37:28,773 INFO L628 ElimStorePlain]: treesize reduction 68, result has 36.4 percent of original size [2021-06-05 04:37:28,774 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 04:37:28,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:37:28,776 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:37:28,788 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:37:28,788 INFO L518 ElimStorePlain]: Eliminatee v_prenex_376 vanished before elimination [2021-06-05 04:37:28,789 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:37:28,789 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-06-05 04:37:28,826 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:37:28,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1661964456] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:37:28,826 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:37:28,826 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 04:37:28,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352920981] [2021-06-05 04:37:28,826 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:37:28,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:37:28,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:37:28,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:37:28,826 INFO L87 Difference]: Start difference. First operand 144 states and 313 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:37:29,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:37:29,101 INFO L93 Difference]: Finished difference Result 182 states and 382 transitions. [2021-06-05 04:37:29,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:37:29,102 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 04:37:29,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:37:29,102 INFO L225 Difference]: With dead ends: 182 [2021-06-05 04:37:29,102 INFO L226 Difference]: Without dead ends: 182 [2021-06-05 04:37:29,102 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 318.8ms TimeCoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:37:29,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2021-06-05 04:37:29,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 146. [2021-06-05 04:37:29,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 2.193103448275862) internal successors, (318), 145 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:37:29,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 318 transitions. [2021-06-05 04:37:29,103 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 318 transitions. Word has length 19 [2021-06-05 04:37:29,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:37:29,104 INFO L482 AbstractCegarLoop]: Abstraction has 146 states and 318 transitions. [2021-06-05 04:37:29,104 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 04:37:29,104 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 318 transitions. [2021-06-05 04:37:29,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:37:29,104 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:37:29,104 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:37:29,304 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 461 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2444 [2021-06-05 04:37:29,304 INFO L430 AbstractCegarLoop]: === Iteration 467 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:37:29,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:37:29,305 INFO L82 PathProgramCache]: Analyzing trace with hash 2010619584, now seen corresponding path program 461 times [2021-06-05 04:37:29,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:37:29,305 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870119243] [2021-06-05 04:37:29,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:37:29,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:37:29,378 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:37:29,378 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:37:29,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870119243] [2021-06-05 04:37:29,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870119243] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:37:29,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949215972] [2021-06-05 04:37:29,379 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 462 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 462 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:37:29,403 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:37:29,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:37:29,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:37:29,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:37:29,560 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 04:37:29,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [949215972] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:37:29,560 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:37:29,560 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:37:29,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872920245] [2021-06-05 04:37:29,560 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:37:29,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:37:29,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:37:29,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:37:29,561 INFO L87 Difference]: Start difference. First operand 146 states and 318 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:37:29,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:37:29,818 INFO L93 Difference]: Finished difference Result 205 states and 423 transitions. [2021-06-05 04:37:29,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:37:29,818 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 04:37:29,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:37:29,818 INFO L225 Difference]: With dead ends: 205 [2021-06-05 04:37:29,818 INFO L226 Difference]: Without dead ends: 205 [2021-06-05 04:37:29,818 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 242.1ms TimeCoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:37:29,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-06-05 04:37:29,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 147. [2021-06-05 04:37:29,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 146 states have (on average 2.212328767123288) internal successors, (323), 146 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:37:29,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 323 transitions. [2021-06-05 04:37:29,820 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 323 transitions. Word has length 19 [2021-06-05 04:37:29,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:37:29,820 INFO L482 AbstractCegarLoop]: Abstraction has 147 states and 323 transitions. [2021-06-05 04:37:29,820 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 04:37:29,820 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 323 transitions. [2021-06-05 04:37:29,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:37:29,820 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:37:29,820 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:37:30,036 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2451,462 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:37:30,036 INFO L430 AbstractCegarLoop]: === Iteration 468 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:37:30,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:37:30,039 INFO L82 PathProgramCache]: Analyzing trace with hash -872501380, now seen corresponding path program 462 times [2021-06-05 04:37:30,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:37:30,040 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677575814] [2021-06-05 04:37:30,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:37:30,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:37:30,122 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:37:30,122 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:37:30,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677575814] [2021-06-05 04:37:30,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677575814] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:37:30,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735397493] [2021-06-05 04:37:30,122 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 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 04:37:30,147 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:37:30,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:37:30,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 04:37:30,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:37:30,279 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:37:30,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1735397493] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:37:30,279 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:37:30,280 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:37:30,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380285300] [2021-06-05 04:37:30,280 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:37:30,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:37:30,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:37:30,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:37:30,280 INFO L87 Difference]: Start difference. First operand 147 states and 323 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:37:30,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:37:30,454 INFO L93 Difference]: Finished difference Result 151 states and 327 transitions. [2021-06-05 04:37:30,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:37:30,454 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 04:37:30,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:37:30,454 INFO L225 Difference]: With dead ends: 151 [2021-06-05 04:37:30,454 INFO L226 Difference]: Without dead ends: 147 [2021-06-05 04:37:30,455 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 223.6ms TimeCoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:37:30,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-06-05 04:37:30,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2021-06-05 04:37:30,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 146 states have (on average 2.2054794520547945) internal successors, (322), 146 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:37:30,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 322 transitions. [2021-06-05 04:37:30,456 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 322 transitions. Word has length 19 [2021-06-05 04:37:30,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:37:30,456 INFO L482 AbstractCegarLoop]: Abstraction has 147 states and 322 transitions. [2021-06-05 04:37:30,456 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 04:37:30,456 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 322 transitions. [2021-06-05 04:37:30,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:37:30,456 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:37:30,456 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:37:30,656 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 463 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2463 [2021-06-05 04:37:30,657 INFO L430 AbstractCegarLoop]: === Iteration 469 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:37:30,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:37:30,657 INFO L82 PathProgramCache]: Analyzing trace with hash -785620146, now seen corresponding path program 463 times [2021-06-05 04:37:30,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:37:30,657 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484547818] [2021-06-05 04:37:30,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:37:30,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:37:30,736 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:37:30,736 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:37:30,736 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484547818] [2021-06-05 04:37:30,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484547818] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:37:30,736 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772440704] [2021-06-05 04:37:30,736 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 464 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 464 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:37:30,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:37:30,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 04:37:30,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:37:30,876 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:30,876 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:30,876 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 17 treesize of output 13 [2021-06-05 04:37:30,877 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:37:30,879 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:30,879 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 17 treesize of output 13 [2021-06-05 04:37:30,880 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:37:30,897 INFO L628 ElimStorePlain]: treesize reduction 34, result has 30.6 percent of original size [2021-06-05 04:37:30,897 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 04:37:30,898 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:37:30,898 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:63, output treesize:9 [2021-06-05 04:37:30,915 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:37:30,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [772440704] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:37:30,916 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:37:30,916 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 04:37:30,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231757265] [2021-06-05 04:37:30,916 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:37:30,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:37:30,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:37:30,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:37:30,916 INFO L87 Difference]: Start difference. First operand 147 states and 322 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:37:31,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:37:31,058 INFO L93 Difference]: Finished difference Result 165 states and 353 transitions. [2021-06-05 04:37:31,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:37:31,058 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 04:37:31,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:37:31,058 INFO L225 Difference]: With dead ends: 165 [2021-06-05 04:37:31,058 INFO L226 Difference]: Without dead ends: 165 [2021-06-05 04:37:31,058 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 219.1ms TimeCoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:37:31,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-06-05 04:37:31,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 143. [2021-06-05 04:37:31,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 2.1901408450704225) internal successors, (311), 142 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:37:31,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 311 transitions. [2021-06-05 04:37:31,060 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 311 transitions. Word has length 19 [2021-06-05 04:37:31,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:37:31,060 INFO L482 AbstractCegarLoop]: Abstraction has 143 states and 311 transitions. [2021-06-05 04:37:31,060 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:37:31,060 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 311 transitions. [2021-06-05 04:37:31,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:37:31,060 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:37:31,060 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:37:31,260 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 464 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2467 [2021-06-05 04:37:31,260 INFO L430 AbstractCegarLoop]: === Iteration 470 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:37:31,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:37:31,261 INFO L82 PathProgramCache]: Analyzing trace with hash -885364406, now seen corresponding path program 464 times [2021-06-05 04:37:31,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:37:31,261 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145742616] [2021-06-05 04:37:31,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:37:31,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:37:31,349 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:37:31,349 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:37:31,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145742616] [2021-06-05 04:37:31,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145742616] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:37:31,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326418693] [2021-06-05 04:37:31,349 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 465 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 465 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:37:31,373 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:37:31,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:37:31,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 04:37:31,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:37:31,527 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:31,528 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:31,528 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 18 treesize of output 14 [2021-06-05 04:37:31,529 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:37:31,531 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:31,532 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 17 treesize of output 13 [2021-06-05 04:37:31,532 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:37:31,580 INFO L628 ElimStorePlain]: treesize reduction 76, result has 42.0 percent of original size [2021-06-05 04:37:31,583 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:31,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 04:37:31,584 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:37:31,600 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:37:31,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:37:31,603 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:37:31,618 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:37:31,618 INFO L518 ElimStorePlain]: Eliminatee v_prenex_379 vanished before elimination [2021-06-05 04:37:31,619 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 04:37:31,619 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:141, output treesize:22 [2021-06-05 04:37:31,664 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 04:37:31,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [326418693] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:37:31,665 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:37:31,665 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 04:37:31,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702614878] [2021-06-05 04:37:31,665 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:37:31,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:37:31,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:37:31,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:37:31,665 INFO L87 Difference]: Start difference. First operand 143 states and 311 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:37:31,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:37:31,935 INFO L93 Difference]: Finished difference Result 178 states and 372 transitions. [2021-06-05 04:37:31,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:37:31,936 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:37:31,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:37:31,936 INFO L225 Difference]: With dead ends: 178 [2021-06-05 04:37:31,936 INFO L226 Difference]: Without dead ends: 178 [2021-06-05 04:37:31,936 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 307.6ms TimeCoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:37:31,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-06-05 04:37:31,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 145. [2021-06-05 04:37:31,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 2.1944444444444446) internal successors, (316), 144 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:37:31,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 316 transitions. [2021-06-05 04:37:31,938 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 316 transitions. Word has length 19 [2021-06-05 04:37:31,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:37:31,938 INFO L482 AbstractCegarLoop]: Abstraction has 145 states and 316 transitions. [2021-06-05 04:37:31,938 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 04:37:31,938 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 316 transitions. [2021-06-05 04:37:31,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:37:31,938 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:37:31,938 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:37:32,160 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2469,465 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:37:32,160 INFO L430 AbstractCegarLoop]: === Iteration 471 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:37:32,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:37:32,161 INFO L82 PathProgramCache]: Analyzing trace with hash 1124821304, now seen corresponding path program 465 times [2021-06-05 04:37:32,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:37:32,161 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404619767] [2021-06-05 04:37:32,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:37:32,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:37:32,240 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:37:32,240 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:37:32,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404619767] [2021-06-05 04:37:32,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404619767] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:37:32,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088308194] [2021-06-05 04:37:32,240 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 466 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 466 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:37:32,266 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:37:32,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:37:32,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:37:32,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:37:32,438 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 04:37:32,438 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1088308194] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:37:32,438 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:37:32,438 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:37:32,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111412545] [2021-06-05 04:37:32,438 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:37:32,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:37:32,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:37:32,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:37:32,438 INFO L87 Difference]: Start difference. First operand 145 states and 316 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:37:32,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:37:32,879 INFO L93 Difference]: Finished difference Result 220 states and 452 transitions. [2021-06-05 04:37:32,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:37:32,879 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 04:37:32,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:37:32,880 INFO L225 Difference]: With dead ends: 220 [2021-06-05 04:37:32,880 INFO L226 Difference]: Without dead ends: 220 [2021-06-05 04:37:32,880 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 442.7ms TimeCoverageRelationStatistics Valid=104, Invalid=598, Unknown=0, NotChecked=0, Total=702 [2021-06-05 04:37:32,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2021-06-05 04:37:32,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 147. [2021-06-05 04:37:32,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 146 states have (on average 2.219178082191781) internal successors, (324), 146 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:37:32,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 324 transitions. [2021-06-05 04:37:32,881 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 324 transitions. Word has length 19 [2021-06-05 04:37:32,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:37:32,881 INFO L482 AbstractCegarLoop]: Abstraction has 147 states and 324 transitions. [2021-06-05 04:37:32,881 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 04:37:32,882 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 324 transitions. [2021-06-05 04:37:32,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:37:32,882 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:37:32,882 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:37:33,082 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 466 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2475 [2021-06-05 04:37:33,082 INFO L430 AbstractCegarLoop]: === Iteration 472 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:37:33,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:37:33,082 INFO L82 PathProgramCache]: Analyzing trace with hash -1758299660, now seen corresponding path program 466 times [2021-06-05 04:37:33,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:37:33,083 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032862228] [2021-06-05 04:37:33,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:37:33,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:37:33,172 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 04:37:33,172 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:37:33,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032862228] [2021-06-05 04:37:33,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032862228] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:37:33,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794084660] [2021-06-05 04:37:33,172 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 467 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 467 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:37:33,196 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:37:33,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:37:33,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:37:33,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:37:33,357 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:37:33,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [794084660] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:37:33,357 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:37:33,358 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:37:33,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666213124] [2021-06-05 04:37:33,358 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:37:33,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:37:33,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:37:33,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:37:33,358 INFO L87 Difference]: Start difference. First operand 147 states and 324 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:37:33,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:37:33,756 INFO L93 Difference]: Finished difference Result 155 states and 334 transitions. [2021-06-05 04:37:33,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:37:33,756 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 04:37:33,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:37:33,757 INFO L225 Difference]: With dead ends: 155 [2021-06-05 04:37:33,757 INFO L226 Difference]: Without dead ends: 151 [2021-06-05 04:37:33,757 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 418.8ms TimeCoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:37:33,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-06-05 04:37:33,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 147. [2021-06-05 04:37:33,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 146 states have (on average 2.212328767123288) internal successors, (323), 146 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:37:33,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 323 transitions. [2021-06-05 04:37:33,758 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 323 transitions. Word has length 19 [2021-06-05 04:37:33,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:37:33,758 INFO L482 AbstractCegarLoop]: Abstraction has 147 states and 323 transitions. [2021-06-05 04:37:33,758 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 04:37:33,758 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 323 transitions. [2021-06-05 04:37:33,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:37:33,758 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:37:33,758 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:37:33,959 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2487,467 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:37:33,959 INFO L430 AbstractCegarLoop]: === Iteration 473 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:37:33,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:37:33,959 INFO L82 PathProgramCache]: Analyzing trace with hash -1671418426, now seen corresponding path program 467 times [2021-06-05 04:37:33,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:37:33,959 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78110490] [2021-06-05 04:37:33,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:37:33,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:37:34,036 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:37:34,036 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:37:34,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78110490] [2021-06-05 04:37:34,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78110490] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:37:34,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053038681] [2021-06-05 04:37:34,036 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 468 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 468 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:37:34,061 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:37:34,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:37:34,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:37:34,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:37:34,210 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 04:37:34,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1053038681] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:37:34,210 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:37:34,210 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:37:34,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394669815] [2021-06-05 04:37:34,211 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:37:34,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:37:34,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:37:34,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:37:34,211 INFO L87 Difference]: Start difference. First operand 147 states and 323 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:37:34,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:37:34,582 INFO L93 Difference]: Finished difference Result 180 states and 383 transitions. [2021-06-05 04:37:34,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:37:34,582 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 04:37:34,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:37:34,582 INFO L225 Difference]: With dead ends: 180 [2021-06-05 04:37:34,582 INFO L226 Difference]: Without dead ends: 180 [2021-06-05 04:37:34,582 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 417.7ms TimeCoverageRelationStatistics Valid=115, Invalid=641, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:37:34,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2021-06-05 04:37:34,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 146. [2021-06-05 04:37:34,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 2.213793103448276) internal successors, (321), 145 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:37:34,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 321 transitions. [2021-06-05 04:37:34,584 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 321 transitions. Word has length 19 [2021-06-05 04:37:34,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:37:34,584 INFO L482 AbstractCegarLoop]: Abstraction has 146 states and 321 transitions. [2021-06-05 04:37:34,584 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 04:37:34,584 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 321 transitions. [2021-06-05 04:37:34,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:37:34,584 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:37:34,584 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:37:34,796 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2492,468 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:37:34,797 INFO L430 AbstractCegarLoop]: === Iteration 474 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:37:34,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:37:34,797 INFO L82 PathProgramCache]: Analyzing trace with hash 2030321370, now seen corresponding path program 468 times [2021-06-05 04:37:34,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:37:34,797 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433983379] [2021-06-05 04:37:34,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:37:34,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:37:34,881 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:37:34,881 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:37:34,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433983379] [2021-06-05 04:37:34,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433983379] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:37:34,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330099969] [2021-06-05 04:37:34,881 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 469 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 469 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:37:34,906 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:37:34,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:37:34,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 04:37:34,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:37:35,050 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:37:35,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [330099969] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:37:35,051 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:37:35,051 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:37:35,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362914796] [2021-06-05 04:37:35,051 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:37:35,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:37:35,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:37:35,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:37:35,051 INFO L87 Difference]: Start difference. First operand 146 states and 321 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:37:35,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:37:35,269 INFO L93 Difference]: Finished difference Result 152 states and 328 transitions. [2021-06-05 04:37:35,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:37:35,270 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 04:37:35,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:37:35,270 INFO L225 Difference]: With dead ends: 152 [2021-06-05 04:37:35,270 INFO L226 Difference]: Without dead ends: 146 [2021-06-05 04:37:35,270 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 262.3ms TimeCoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:37:35,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-06-05 04:37:35,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 146. [2021-06-05 04:37:35,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 2.206896551724138) internal successors, (320), 145 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:37:35,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 320 transitions. [2021-06-05 04:37:35,271 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 320 transitions. Word has length 19 [2021-06-05 04:37:35,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:37:35,272 INFO L482 AbstractCegarLoop]: Abstraction has 146 states and 320 transitions. [2021-06-05 04:37:35,272 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 04:37:35,272 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 320 transitions. [2021-06-05 04:37:35,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:37:35,272 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:37:35,272 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:37:35,495 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 469 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2496 [2021-06-05 04:37:35,495 INFO L430 AbstractCegarLoop]: === Iteration 475 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:37:35,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:37:35,495 INFO L82 PathProgramCache]: Analyzing trace with hash 516764750, now seen corresponding path program 469 times [2021-06-05 04:37:35,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:37:35,495 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755945795] [2021-06-05 04:37:35,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:37:35,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:37:35,577 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:37:35,578 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:37:35,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755945795] [2021-06-05 04:37:35,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755945795] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:37:35,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040248245] [2021-06-05 04:37:35,578 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 470 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 470 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:37:35,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:37:35,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 04:37:35,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:37:35,730 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:35,730 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:35,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:37:35,731 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:37:35,733 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:35,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:37:35,734 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:37:35,752 INFO L628 ElimStorePlain]: treesize reduction 28, result has 42.9 percent of original size [2021-06-05 04:37:35,753 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:35,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-06-05 04:37:35,755 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:37:35,760 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:37:35,761 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 04:37:35,761 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:63, output treesize:9 [2021-06-05 04:37:35,780 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:37:35,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2040248245] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:37:35,780 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:37:35,780 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 04:37:35,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506565278] [2021-06-05 04:37:35,780 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:37:35,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:37:35,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:37:35,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:37:35,781 INFO L87 Difference]: Start difference. First operand 146 states and 320 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:37:35,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:37:35,939 INFO L93 Difference]: Finished difference Result 170 states and 361 transitions. [2021-06-05 04:37:35,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:37:35,939 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 04:37:35,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:37:35,940 INFO L225 Difference]: With dead ends: 170 [2021-06-05 04:37:35,940 INFO L226 Difference]: Without dead ends: 170 [2021-06-05 04:37:35,940 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 201.2ms TimeCoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:37:35,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-06-05 04:37:35,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 141. [2021-06-05 04:37:35,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 2.1857142857142855) internal successors, (306), 140 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:37:35,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 306 transitions. [2021-06-05 04:37:35,941 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 306 transitions. Word has length 19 [2021-06-05 04:37:35,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:37:35,941 INFO L482 AbstractCegarLoop]: Abstraction has 141 states and 306 transitions. [2021-06-05 04:37:35,941 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 04:37:35,941 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 306 transitions. [2021-06-05 04:37:35,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:37:35,941 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:37:35,941 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:37:36,142 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 470 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2500 [2021-06-05 04:37:36,142 INFO L430 AbstractCegarLoop]: === Iteration 476 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:37:36,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:37:36,142 INFO L82 PathProgramCache]: Analyzing trace with hash -1925238340, now seen corresponding path program 470 times [2021-06-05 04:37:36,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:37:36,143 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620654221] [2021-06-05 04:37:36,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:37:36,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:37:36,262 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:37:36,262 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:37:36,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620654221] [2021-06-05 04:37:36,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620654221] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:37:36,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245993001] [2021-06-05 04:37:36,262 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 471 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 471 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:37:36,287 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:37:36,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:37:36,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 04:37:36,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:37:36,467 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:36,468 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:36,468 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 17 treesize of output 13 [2021-06-05 04:37:36,469 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:37:36,471 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:36,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 04:37:36,472 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:37:36,519 INFO L628 ElimStorePlain]: treesize reduction 78, result has 40.5 percent of original size [2021-06-05 04:37:36,521 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:36,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 04:37:36,523 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:37:36,539 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:37:36,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index 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 04:37:36,542 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:37:36,557 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:37:36,557 INFO L518 ElimStorePlain]: Eliminatee v_prenex_386 vanished before elimination [2021-06-05 04:37:36,558 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:37:36,558 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:141, output treesize:22 [2021-06-05 04:37:36,605 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 04:37:36,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1245993001] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:37:36,605 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:37:36,605 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 04:37:36,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107969637] [2021-06-05 04:37:36,606 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:37:36,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:37:36,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:37:36,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:37:36,606 INFO L87 Difference]: Start difference. First operand 141 states and 306 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:37:36,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:37:36,859 INFO L93 Difference]: Finished difference Result 184 states and 384 transitions. [2021-06-05 04:37:36,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:37:36,859 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 04:37:36,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:37:36,859 INFO L225 Difference]: With dead ends: 184 [2021-06-05 04:37:36,859 INFO L226 Difference]: Without dead ends: 184 [2021-06-05 04:37:36,860 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 323.9ms TimeCoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:37:36,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-06-05 04:37:36,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 141. [2021-06-05 04:37:36,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 2.1857142857142855) internal successors, (306), 140 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:37:36,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 306 transitions. [2021-06-05 04:37:36,861 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 306 transitions. Word has length 19 [2021-06-05 04:37:36,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:37:36,861 INFO L482 AbstractCegarLoop]: Abstraction has 141 states and 306 transitions. [2021-06-05 04:37:36,861 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 04:37:36,861 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 306 transitions. [2021-06-05 04:37:36,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:37:36,861 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:37:36,861 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:37:37,062 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 471 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2502 [2021-06-05 04:37:37,062 INFO L430 AbstractCegarLoop]: === Iteration 477 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:37:37,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:37:37,062 INFO L82 PathProgramCache]: Analyzing trace with hash -1215190570, now seen corresponding path program 471 times [2021-06-05 04:37:37,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:37:37,062 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367436611] [2021-06-05 04:37:37,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:37:37,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:37:37,161 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 04:37:37,161 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:37:37,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367436611] [2021-06-05 04:37:37,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367436611] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:37:37,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190357021] [2021-06-05 04:37:37,162 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 472 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 472 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:37:37,189 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:37:37,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:37:37,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:37:37,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:37:37,386 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:37:37,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1190357021] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:37:37,386 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:37:37,386 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:37:37,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065341267] [2021-06-05 04:37:37,386 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:37:37,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:37:37,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:37:37,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:37:37,386 INFO L87 Difference]: Start difference. First operand 141 states and 306 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:37:38,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:37:38,109 INFO L93 Difference]: Finished difference Result 211 states and 433 transitions. [2021-06-05 04:37:38,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:37:38,109 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 04:37:38,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:37:38,110 INFO L225 Difference]: With dead ends: 211 [2021-06-05 04:37:38,110 INFO L226 Difference]: Without dead ends: 211 [2021-06-05 04:37:38,110 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 658.6ms TimeCoverageRelationStatistics Valid=126, Invalid=744, Unknown=0, NotChecked=0, Total=870 [2021-06-05 04:37:38,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-06-05 04:37:38,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 144. [2021-06-05 04:37:38,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 2.2167832167832167) internal successors, (317), 143 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:37:38,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 317 transitions. [2021-06-05 04:37:38,112 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 317 transitions. Word has length 19 [2021-06-05 04:37:38,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:37:38,112 INFO L482 AbstractCegarLoop]: Abstraction has 144 states and 317 transitions. [2021-06-05 04:37:38,112 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 04:37:38,112 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 317 transitions. [2021-06-05 04:37:38,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:37:38,112 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:37:38,112 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:37:38,312 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2508,472 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:37:38,313 INFO L430 AbstractCegarLoop]: === Iteration 478 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:37:38,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:37:38,313 INFO L82 PathProgramCache]: Analyzing trace with hash 846724732, now seen corresponding path program 472 times [2021-06-05 04:37:38,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:37:38,313 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703477973] [2021-06-05 04:37:38,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:37:38,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:37:38,440 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:37:38,440 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:37:38,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703477973] [2021-06-05 04:37:38,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703477973] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:37:38,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903136880] [2021-06-05 04:37:38,440 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 04:37:38,465 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:37:38,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:37:38,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:37:38,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:37:38,654 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:37:38,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1903136880] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:37:38,654 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:37:38,654 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:37:38,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454045451] [2021-06-05 04:37:38,654 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:37:38,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:37:38,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:37:38,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:37:38,655 INFO L87 Difference]: Start difference. First operand 144 states and 317 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:37:39,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:37:39,129 INFO L93 Difference]: Finished difference Result 155 states and 332 transitions. [2021-06-05 04:37:39,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:37:39,129 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 04:37:39,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:37:39,129 INFO L225 Difference]: With dead ends: 155 [2021-06-05 04:37:39,129 INFO L226 Difference]: Without dead ends: 151 [2021-06-05 04:37:39,130 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 555.9ms TimeCoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:37:39,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-06-05 04:37:39,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 144. [2021-06-05 04:37:39,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 2.2097902097902096) internal successors, (316), 143 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:37:39,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 316 transitions. [2021-06-05 04:37:39,131 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 316 transitions. Word has length 19 [2021-06-05 04:37:39,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:37:39,131 INFO L482 AbstractCegarLoop]: Abstraction has 144 states and 316 transitions. [2021-06-05 04:37:39,131 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 04:37:39,131 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 316 transitions. [2021-06-05 04:37:39,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:37:39,131 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:37:39,131 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:37:39,331 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2520,473 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:37:39,332 INFO L430 AbstractCegarLoop]: === Iteration 479 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:37:39,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:37:39,332 INFO L82 PathProgramCache]: Analyzing trace with hash 933605966, now seen corresponding path program 473 times [2021-06-05 04:37:39,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:37:39,332 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636178893] [2021-06-05 04:37:39,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:37:39,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:37:39,413 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:37:39,413 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:37:39,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636178893] [2021-06-05 04:37:39,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636178893] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:37:39,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146540504] [2021-06-05 04:37:39,413 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 474 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 474 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:37:39,438 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:37:39,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:37:39,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:37:39,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:37:39,604 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 04:37:39,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1146540504] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:37:39,604 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:37:39,604 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:37:39,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551970669] [2021-06-05 04:37:39,604 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:37:39,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:37:39,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:37:39,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:37:39,605 INFO L87 Difference]: Start difference. First operand 144 states and 316 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:37:40,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:37:40,079 INFO L93 Difference]: Finished difference Result 186 states and 394 transitions. [2021-06-05 04:37:40,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:37:40,079 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 04:37:40,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:37:40,080 INFO L225 Difference]: With dead ends: 186 [2021-06-05 04:37:40,080 INFO L226 Difference]: Without dead ends: 186 [2021-06-05 04:37:40,080 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 464.8ms TimeCoverageRelationStatistics Valid=102, Invalid=600, Unknown=0, NotChecked=0, Total=702 [2021-06-05 04:37:40,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-06-05 04:37:40,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 143. [2021-06-05 04:37:40,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 2.211267605633803) internal successors, (314), 142 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:37:40,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 314 transitions. [2021-06-05 04:37:40,081 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 314 transitions. Word has length 19 [2021-06-05 04:37:40,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:37:40,081 INFO L482 AbstractCegarLoop]: Abstraction has 143 states and 314 transitions. [2021-06-05 04:37:40,081 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 04:37:40,081 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 314 transitions. [2021-06-05 04:37:40,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:37:40,082 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:37:40,082 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:37:40,282 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 474 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2525 [2021-06-05 04:37:40,282 INFO L430 AbstractCegarLoop]: === Iteration 480 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:37:40,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:37:40,282 INFO L82 PathProgramCache]: Analyzing trace with hash 340378466, now seen corresponding path program 474 times [2021-06-05 04:37:40,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:37:40,282 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406306335] [2021-06-05 04:37:40,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:37:40,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:37:40,390 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 04:37:40,390 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:37:40,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406306335] [2021-06-05 04:37:40,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406306335] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:37:40,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1679612996] [2021-06-05 04:37:40,391 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 475 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 475 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:37:40,415 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:37:40,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:37:40,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 04:37:40,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:37:40,596 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 04:37:40,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1679612996] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:37:40,597 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:37:40,597 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:37:40,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062814491] [2021-06-05 04:37:40,597 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:37:40,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:37:40,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:37:40,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:37:40,597 INFO L87 Difference]: Start difference. First operand 143 states and 314 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:37:40,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:37:40,815 INFO L93 Difference]: Finished difference Result 153 states and 327 transitions. [2021-06-05 04:37:40,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:37:40,815 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 04:37:40,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:37:40,815 INFO L225 Difference]: With dead ends: 153 [2021-06-05 04:37:40,815 INFO L226 Difference]: Without dead ends: 147 [2021-06-05 04:37:40,815 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 312.0ms TimeCoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:37:40,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-06-05 04:37:40,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 143. [2021-06-05 04:37:40,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 2.204225352112676) internal successors, (313), 142 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:37:40,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 313 transitions. [2021-06-05 04:37:40,817 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 313 transitions. Word has length 19 [2021-06-05 04:37:40,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:37:40,817 INFO L482 AbstractCegarLoop]: Abstraction has 143 states and 313 transitions. [2021-06-05 04:37:40,817 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 04:37:40,817 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 313 transitions. [2021-06-05 04:37:40,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:37:40,817 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:37:40,817 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:37:41,017 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2529,475 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:37:41,017 INFO L430 AbstractCegarLoop]: === Iteration 481 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:37:41,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:37:41,018 INFO L82 PathProgramCache]: Analyzing trace with hash -1173178154, now seen corresponding path program 475 times [2021-06-05 04:37:41,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:37:41,018 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627361144] [2021-06-05 04:37:41,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:37:41,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:37:41,097 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:37:41,097 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:37:41,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627361144] [2021-06-05 04:37:41,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627361144] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:37:41,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [692495336] [2021-06-05 04:37:41,097 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 04:37:41,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:37:41,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 04:37:41,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:37:41,270 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:41,271 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:41,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:37:41,272 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:37:41,273 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:41,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:37:41,274 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:37:41,292 INFO L628 ElimStorePlain]: treesize reduction 28, result has 42.9 percent of original size [2021-06-05 04:37:41,294 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:41,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-06-05 04:37:41,295 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:37:41,301 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:37:41,301 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 04:37:41,302 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:63, output treesize:9 [2021-06-05 04:37:41,321 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:37:41,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [692495336] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:37:41,321 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:37:41,321 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 04:37:41,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555365349] [2021-06-05 04:37:41,321 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:37:41,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:37:41,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:37:41,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:37:41,322 INFO L87 Difference]: Start difference. First operand 143 states and 313 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:37:41,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:37:41,674 INFO L93 Difference]: Finished difference Result 179 states and 381 transitions. [2021-06-05 04:37:41,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:37:41,674 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 04:37:41,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:37:41,674 INFO L225 Difference]: With dead ends: 179 [2021-06-05 04:37:41,674 INFO L226 Difference]: Without dead ends: 179 [2021-06-05 04:37:41,674 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 407.6ms TimeCoverageRelationStatistics Valid=99, Invalid=657, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:37:41,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-06-05 04:37:41,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 142. [2021-06-05 04:37:41,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 2.2056737588652484) internal successors, (311), 141 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:37:41,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 311 transitions. [2021-06-05 04:37:41,676 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 311 transitions. Word has length 19 [2021-06-05 04:37:41,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:37:41,676 INFO L482 AbstractCegarLoop]: Abstraction has 142 states and 311 transitions. [2021-06-05 04:37:41,676 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 04:37:41,676 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 311 transitions. [2021-06-05 04:37:41,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:37:41,676 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:37:41,676 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:37:41,876 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 476 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2533 [2021-06-05 04:37:41,876 INFO L430 AbstractCegarLoop]: === Iteration 482 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:37:41,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:37:41,877 INFO L82 PathProgramCache]: Analyzing trace with hash 1823513404, now seen corresponding path program 476 times [2021-06-05 04:37:41,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:37:41,877 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389957824] [2021-06-05 04:37:41,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:37:41,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:37:41,956 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 04:37:41,956 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:37:41,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389957824] [2021-06-05 04:37:41,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389957824] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:37:41,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33106576] [2021-06-05 04:37:41,956 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 477 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 477 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:37:41,980 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:37:41,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:37:41,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 04:37:41,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:37:42,141 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 04:37:42,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [33106576] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:37:42,141 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:37:42,141 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:37:42,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787543930] [2021-06-05 04:37:42,141 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:37:42,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:37:42,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:37:42,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:37:42,141 INFO L87 Difference]: Start difference. First operand 142 states and 311 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:37:42,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:37:42,283 INFO L93 Difference]: Finished difference Result 150 states and 321 transitions. [2021-06-05 04:37:42,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:37:42,284 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 04:37:42,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:37:42,284 INFO L225 Difference]: With dead ends: 150 [2021-06-05 04:37:42,284 INFO L226 Difference]: Without dead ends: 142 [2021-06-05 04:37:42,284 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 207.6ms TimeCoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:37:42,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-06-05 04:37:42,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2021-06-05 04:37:42,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 2.198581560283688) internal successors, (310), 141 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:37:42,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 310 transitions. [2021-06-05 04:37:42,285 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 310 transitions. Word has length 19 [2021-06-05 04:37:42,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:37:42,285 INFO L482 AbstractCegarLoop]: Abstraction has 142 states and 310 transitions. [2021-06-05 04:37:42,285 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 04:37:42,285 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 310 transitions. [2021-06-05 04:37:42,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:37:42,285 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:37:42,285 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:37:42,486 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 477 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2535 [2021-06-05 04:37:42,486 INFO L430 AbstractCegarLoop]: === Iteration 483 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:37:42,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:37:42,486 INFO L82 PathProgramCache]: Analyzing trace with hash -2058976434, now seen corresponding path program 477 times [2021-06-05 04:37:42,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:37:42,486 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185721737] [2021-06-05 04:37:42,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:37:42,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:37:42,561 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:37:42,561 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:37:42,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185721737] [2021-06-05 04:37:42,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185721737] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:37:42,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114507806] [2021-06-05 04:37:42,562 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 478 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 478 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:37:42,587 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:37:42,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:37:42,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:37:42,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:37:42,731 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:37:42,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1114507806] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:37:42,731 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:37:42,731 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:37:42,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517193204] [2021-06-05 04:37:42,731 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:37:42,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:37:42,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:37:42,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:37:42,731 INFO L87 Difference]: Start difference. First operand 142 states and 310 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:37:42,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:37:42,875 INFO L93 Difference]: Finished difference Result 159 states and 339 transitions. [2021-06-05 04:37:42,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:37:42,876 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 04:37:42,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:37:42,876 INFO L225 Difference]: With dead ends: 159 [2021-06-05 04:37:42,876 INFO L226 Difference]: Without dead ends: 159 [2021-06-05 04:37:42,876 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 170.2ms TimeCoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:37:42,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-06-05 04:37:42,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 136. [2021-06-05 04:37:42,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 2.1703703703703705) internal successors, (293), 135 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:37:42,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 293 transitions. [2021-06-05 04:37:42,877 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 293 transitions. Word has length 19 [2021-06-05 04:37:42,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:37:42,877 INFO L482 AbstractCegarLoop]: Abstraction has 136 states and 293 transitions. [2021-06-05 04:37:42,877 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 04:37:42,877 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 293 transitions. [2021-06-05 04:37:42,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:37:42,878 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:37:42,878 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:37:43,078 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 478 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2540 [2021-06-05 04:37:43,078 INFO L430 AbstractCegarLoop]: === Iteration 484 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:37:43,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:37:43,079 INFO L82 PathProgramCache]: Analyzing trace with hash -27202426, now seen corresponding path program 478 times [2021-06-05 04:37:43,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:37:43,079 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762216791] [2021-06-05 04:37:43,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:37:43,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:37:43,163 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:37:43,163 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:37:43,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762216791] [2021-06-05 04:37:43,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762216791] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:37:43,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164287495] [2021-06-05 04:37:43,163 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 04:37:43,188 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:37:43,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:37:43,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 04:37:43,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:37:43,289 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:43,290 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:43,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:37:43,291 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:37:43,293 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:43,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:37:43,293 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:37:43,311 INFO L628 ElimStorePlain]: treesize reduction 40, result has 29.8 percent of original size [2021-06-05 04:37:43,311 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 04:37:43,312 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:37:43,312 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:67, output treesize:9 [2021-06-05 04:37:43,328 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 04:37:43,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [164287495] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:37:43,328 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:37:43,328 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:37:43,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008274373] [2021-06-05 04:37:43,328 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:37:43,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:37:43,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:37:43,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:37:43,329 INFO L87 Difference]: Start difference. First operand 136 states and 293 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:37:43,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:37:43,549 INFO L93 Difference]: Finished difference Result 178 states and 377 transitions. [2021-06-05 04:37:43,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:37:43,549 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 04:37:43,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:37:43,550 INFO L225 Difference]: With dead ends: 178 [2021-06-05 04:37:43,550 INFO L226 Difference]: Without dead ends: 178 [2021-06-05 04:37:43,550 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 231.7ms TimeCoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:37:43,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-06-05 04:37:43,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 136. [2021-06-05 04:37:43,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 2.1703703703703705) internal successors, (293), 135 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:37:43,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 293 transitions. [2021-06-05 04:37:43,551 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 293 transitions. Word has length 19 [2021-06-05 04:37:43,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:37:43,551 INFO L482 AbstractCegarLoop]: Abstraction has 136 states and 293 transitions. [2021-06-05 04:37:43,551 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 04:37:43,551 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 293 transitions. [2021-06-05 04:37:43,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:37:43,551 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:37:43,551 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:37:43,752 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 479 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2544 [2021-06-05 04:37:43,752 INFO L430 AbstractCegarLoop]: === Iteration 485 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:37:43,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:37:43,752 INFO L82 PathProgramCache]: Analyzing trace with hash 1374926730, now seen corresponding path program 479 times [2021-06-05 04:37:43,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:37:43,752 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464991449] [2021-06-05 04:37:43,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:37:43,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:37:43,846 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:37:43,847 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:37:43,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464991449] [2021-06-05 04:37:43,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464991449] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:37:43,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311454705] [2021-06-05 04:37:43,847 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 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 04:37:43,871 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:37:43,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:37:43,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:37:43,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:37:43,990 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:37:43,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1311454705] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:37:43,990 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:37:43,990 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 04:37:43,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449566002] [2021-06-05 04:37:43,990 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:37:43,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:37:43,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:37:43,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:37:43,991 INFO L87 Difference]: Start difference. First operand 136 states and 293 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:37:44,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:37:44,404 INFO L93 Difference]: Finished difference Result 146 states and 308 transitions. [2021-06-05 04:37:44,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:37:44,404 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 04:37:44,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:37:44,405 INFO L225 Difference]: With dead ends: 146 [2021-06-05 04:37:44,405 INFO L226 Difference]: Without dead ends: 140 [2021-06-05 04:37:44,405 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 412.0ms TimeCoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:37:44,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-06-05 04:37:44,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 135. [2021-06-05 04:37:44,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 2.1641791044776117) internal successors, (290), 134 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:37:44,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 290 transitions. [2021-06-05 04:37:44,406 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 290 transitions. Word has length 19 [2021-06-05 04:37:44,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:37:44,406 INFO L482 AbstractCegarLoop]: Abstraction has 135 states and 290 transitions. [2021-06-05 04:37:44,406 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 04:37:44,406 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 290 transitions. [2021-06-05 04:37:44,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:37:44,406 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:37:44,406 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:37:44,606 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 480 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2545 [2021-06-05 04:37:44,607 INFO L430 AbstractCegarLoop]: === Iteration 486 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:37:44,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:37:44,607 INFO L82 PathProgramCache]: Analyzing trace with hash -1271981482, now seen corresponding path program 480 times [2021-06-05 04:37:44,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:37:44,607 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342901100] [2021-06-05 04:37:44,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:37:44,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:37:44,683 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:37:44,683 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:37:44,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342901100] [2021-06-05 04:37:44,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342901100] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:37:44,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [517997793] [2021-06-05 04:37:44,683 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 481 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 481 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:37:44,710 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:37:44,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:37:44,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:37:44,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:37:44,827 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:44,828 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:44,828 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 04:37:44,828 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:37:44,830 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:44,830 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 04:37:44,831 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:37:44,845 INFO L628 ElimStorePlain]: treesize reduction 29, result has 32.6 percent of original size [2021-06-05 04:37:44,845 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 04:37:44,846 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 04:37:44,846 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:57, output treesize:6 [2021-06-05 04:37:44,861 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 04:37:44,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [517997793] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:37:44,861 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:37:44,861 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:37:44,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032170754] [2021-06-05 04:37:44,861 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:37:44,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:37:44,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:37:44,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:37:44,861 INFO L87 Difference]: Start difference. First operand 135 states and 290 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:37:45,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:37:45,321 INFO L93 Difference]: Finished difference Result 188 states and 396 transitions. [2021-06-05 04:37:45,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:37:45,321 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 04:37:45,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:37:45,321 INFO L225 Difference]: With dead ends: 188 [2021-06-05 04:37:45,321 INFO L226 Difference]: Without dead ends: 188 [2021-06-05 04:37:45,321 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 411.3ms TimeCoverageRelationStatistics Valid=126, Invalid=744, Unknown=0, NotChecked=0, Total=870 [2021-06-05 04:37:45,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-06-05 04:37:45,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 136. [2021-06-05 04:37:45,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 2.162962962962963) internal successors, (292), 135 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:37:45,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 292 transitions. [2021-06-05 04:37:45,323 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 292 transitions. Word has length 19 [2021-06-05 04:37:45,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:37:45,323 INFO L482 AbstractCegarLoop]: Abstraction has 136 states and 292 transitions. [2021-06-05 04:37:45,323 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:37:45,323 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 292 transitions. [2021-06-05 04:37:45,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:37:45,323 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:37:45,323 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:37:45,523 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2549,481 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:37:45,524 INFO L430 AbstractCegarLoop]: === Iteration 487 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:37:45,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:37:45,524 INFO L82 PathProgramCache]: Analyzing trace with hash -2058035502, now seen corresponding path program 481 times [2021-06-05 04:37:45,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:37:45,524 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506275753] [2021-06-05 04:37:45,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:37:45,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:37:45,616 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 04:37:45,616 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:37:45,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506275753] [2021-06-05 04:37:45,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506275753] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:37:45,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786747141] [2021-06-05 04:37:45,616 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 482 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 482 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:37:45,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:37:45,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:37:45,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:37:45,774 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:37:45,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [786747141] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:37:45,774 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:37:45,774 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 04:37:45,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787169324] [2021-06-05 04:37:45,774 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:37:45,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:37:45,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:37:45,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:37:45,775 INFO L87 Difference]: Start difference. First operand 136 states and 292 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:37:46,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:37:46,328 INFO L93 Difference]: Finished difference Result 176 states and 363 transitions. [2021-06-05 04:37:46,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:37:46,329 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 04:37:46,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:37:46,329 INFO L225 Difference]: With dead ends: 176 [2021-06-05 04:37:46,329 INFO L226 Difference]: Without dead ends: 173 [2021-06-05 04:37:46,329 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 501.6ms TimeCoverageRelationStatistics Valid=95, Invalid=661, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:37:46,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-06-05 04:37:46,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 141. [2021-06-05 04:37:46,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 2.1714285714285713) internal successors, (304), 140 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:37:46,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 304 transitions. [2021-06-05 04:37:46,330 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 304 transitions. Word has length 19 [2021-06-05 04:37:46,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:37:46,331 INFO L482 AbstractCegarLoop]: Abstraction has 141 states and 304 transitions. [2021-06-05 04:37:46,331 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 04:37:46,331 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 304 transitions. [2021-06-05 04:37:46,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:37:46,331 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:37:46,331 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:37:46,531 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 482 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2553 [2021-06-05 04:37:46,531 INFO L430 AbstractCegarLoop]: === Iteration 488 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:37:46,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:37:46,532 INFO L82 PathProgramCache]: Analyzing trace with hash 2013000326, now seen corresponding path program 482 times [2021-06-05 04:37:46,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:37:46,532 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060712404] [2021-06-05 04:37:46,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:37:46,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:37:46,608 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:37:46,608 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:37:46,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060712404] [2021-06-05 04:37:46,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060712404] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:37:46,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143891209] [2021-06-05 04:37:46,609 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 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 04:37:46,633 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:37:46,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:37:46,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 04:37:46,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:37:46,734 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:46,735 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:46,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:37:46,736 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:37:46,738 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:46,738 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:46,739 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 17 treesize of output 13 [2021-06-05 04:37:46,739 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:37:46,742 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:46,742 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:46,742 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 18 treesize of output 14 [2021-06-05 04:37:46,743 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:37:46,745 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:46,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 04:37:46,746 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:37:46,785 INFO L628 ElimStorePlain]: treesize reduction 73, result has 38.7 percent of original size [2021-06-05 04:37:46,788 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:46,788 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 12 treesize of output 8 [2021-06-05 04:37:46,789 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:37:46,805 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:37:46,806 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 04:37:46,806 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:141, output treesize:22 [2021-06-05 04:37:46,849 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 04:37:46,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1143891209] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:37:46,849 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:37:46,849 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:37:46,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553057077] [2021-06-05 04:37:46,849 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:37:46,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:37:46,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:37:46,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:37:46,849 INFO L87 Difference]: Start difference. First operand 141 states and 304 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:37:47,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:37:47,523 INFO L93 Difference]: Finished difference Result 220 states and 454 transitions. [2021-06-05 04:37:47,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 04:37:47,523 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 04:37:47,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:37:47,524 INFO L225 Difference]: With dead ends: 220 [2021-06-05 04:37:47,524 INFO L226 Difference]: Without dead ends: 220 [2021-06-05 04:37:47,524 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 651.3ms TimeCoverageRelationStatistics Valid=171, Invalid=1019, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 04:37:47,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2021-06-05 04:37:47,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 141. [2021-06-05 04:37:47,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 2.1714285714285713) internal successors, (304), 140 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:37:47,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 304 transitions. [2021-06-05 04:37:47,525 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 304 transitions. Word has length 19 [2021-06-05 04:37:47,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:37:47,525 INFO L482 AbstractCegarLoop]: Abstraction has 141 states and 304 transitions. [2021-06-05 04:37:47,525 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 04:37:47,525 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 304 transitions. [2021-06-05 04:37:47,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:37:47,526 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:37:47,526 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:37:47,726 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2563,483 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:37:47,726 INFO L430 AbstractCegarLoop]: === Iteration 489 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:37:47,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:37:47,726 INFO L82 PathProgramCache]: Analyzing trace with hash 602209494, now seen corresponding path program 483 times [2021-06-05 04:37:47,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:37:47,726 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374984033] [2021-06-05 04:37:47,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:37:47,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:37:47,799 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:37:47,799 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:37:47,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374984033] [2021-06-05 04:37:47,800 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374984033] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:37:47,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609341702] [2021-06-05 04:37:47,800 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 484 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 484 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:37:47,825 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:37:47,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:37:47,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:37:47,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:37:47,941 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:47,942 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:47,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:37:47,943 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:37:47,945 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:47,945 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:47,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:37:47,946 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:37:47,948 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:47,948 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:47,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:37:47,949 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:37:47,951 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:47,952 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 04:37:47,952 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:37:47,984 INFO L628 ElimStorePlain]: treesize reduction 53, result has 36.9 percent of original size [2021-06-05 04:37:47,984 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 04:37:47,985 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 04:37:47,985 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:121, output treesize:15 [2021-06-05 04:37:48,012 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:37:48,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1609341702] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:37:48,012 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:37:48,012 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 04:37:48,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097888987] [2021-06-05 04:37:48,012 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:37:48,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:37:48,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:37:48,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:37:48,012 INFO L87 Difference]: Start difference. First operand 141 states and 304 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:37:48,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:37:48,580 INFO L93 Difference]: Finished difference Result 183 states and 385 transitions. [2021-06-05 04:37:48,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 04:37:48,580 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:37:48,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:37:48,580 INFO L225 Difference]: With dead ends: 183 [2021-06-05 04:37:48,580 INFO L226 Difference]: Without dead ends: 181 [2021-06-05 04:37:48,581 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 557.4ms TimeCoverageRelationStatistics Valid=142, Invalid=850, Unknown=0, NotChecked=0, Total=992 [2021-06-05 04:37:48,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-06-05 04:37:48,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 141. [2021-06-05 04:37:48,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 2.164285714285714) internal successors, (303), 140 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:37:48,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 303 transitions. [2021-06-05 04:37:48,582 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 303 transitions. Word has length 19 [2021-06-05 04:37:48,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:37:48,582 INFO L482 AbstractCegarLoop]: Abstraction has 141 states and 303 transitions. [2021-06-05 04:37:48,582 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:37:48,582 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 303 transitions. [2021-06-05 04:37:48,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:37:48,582 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:37:48,582 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:37:48,782 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 484 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2566 [2021-06-05 04:37:48,783 INFO L430 AbstractCegarLoop]: === Iteration 490 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:37:48,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:37:48,783 INFO L82 PathProgramCache]: Analyzing trace with hash -921850230, now seen corresponding path program 484 times [2021-06-05 04:37:48,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:37:48,783 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085971848] [2021-06-05 04:37:48,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:37:48,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:37:48,894 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:37:48,894 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:37:48,894 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085971848] [2021-06-05 04:37:48,894 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085971848] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:37:48,894 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339426528] [2021-06-05 04:37:48,894 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 485 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 485 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:37:48,924 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:37:48,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:37:48,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:37:48,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:37:49,054 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 04:37:49,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [339426528] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:37:49,054 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:37:49,054 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 04:37:49,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530504012] [2021-06-05 04:37:49,055 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:37:49,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:37:49,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:37:49,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:37:49,055 INFO L87 Difference]: Start difference. First operand 141 states and 303 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:37:49,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:37:49,456 INFO L93 Difference]: Finished difference Result 159 states and 338 transitions. [2021-06-05 04:37:49,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:37:49,456 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 04:37:49,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:37:49,457 INFO L225 Difference]: With dead ends: 159 [2021-06-05 04:37:49,457 INFO L226 Difference]: Without dead ends: 159 [2021-06-05 04:37:49,457 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 397.2ms TimeCoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:37:49,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-06-05 04:37:49,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 134. [2021-06-05 04:37:49,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 2.1654135338345863) internal successors, (288), 133 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:37:49,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 288 transitions. [2021-06-05 04:37:49,458 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 288 transitions. Word has length 19 [2021-06-05 04:37:49,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:37:49,458 INFO L482 AbstractCegarLoop]: Abstraction has 134 states and 288 transitions. [2021-06-05 04:37:49,458 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 04:37:49,458 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 288 transitions. [2021-06-05 04:37:49,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:37:49,458 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:37:49,458 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:37:49,659 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2577,485 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:37:49,659 INFO L430 AbstractCegarLoop]: === Iteration 491 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:37:49,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:37:49,659 INFO L82 PathProgramCache]: Analyzing trace with hash 2137187534, now seen corresponding path program 485 times [2021-06-05 04:37:49,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:37:49,659 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069290057] [2021-06-05 04:37:49,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:37:49,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:37:49,739 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:37:49,740 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:37:49,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069290057] [2021-06-05 04:37:49,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069290057] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:37:49,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1883075046] [2021-06-05 04:37:49,740 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 486 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 486 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:37:49,765 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:37:49,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:37:49,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:37:49,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:37:49,870 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:49,871 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:49,871 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 15 treesize of output 11 [2021-06-05 04:37:49,871 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:37:49,873 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:49,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:37:49,874 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:37:49,888 INFO L628 ElimStorePlain]: treesize reduction 29, result has 32.6 percent of original size [2021-06-05 04:37:49,888 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 04:37:49,888 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:37:49,889 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:57, output treesize:6 [2021-06-05 04:37:49,903 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 04:37:49,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1883075046] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:37:49,903 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:37:49,903 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:37:49,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557563885] [2021-06-05 04:37:49,903 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:37:49,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:37:49,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:37:49,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:37:49,904 INFO L87 Difference]: Start difference. First operand 134 states and 288 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:37:50,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:37:50,163 INFO L93 Difference]: Finished difference Result 175 states and 370 transitions. [2021-06-05 04:37:50,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:37:50,163 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 04:37:50,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:37:50,163 INFO L225 Difference]: With dead ends: 175 [2021-06-05 04:37:50,163 INFO L226 Difference]: Without dead ends: 175 [2021-06-05 04:37:50,163 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 248.8ms TimeCoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:37:50,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-06-05 04:37:50,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 135. [2021-06-05 04:37:50,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 2.1641791044776117) internal successors, (290), 134 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:37:50,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 290 transitions. [2021-06-05 04:37:50,165 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 290 transitions. Word has length 19 [2021-06-05 04:37:50,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:37:50,165 INFO L482 AbstractCegarLoop]: Abstraction has 135 states and 290 transitions. [2021-06-05 04:37:50,165 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 04:37:50,165 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 290 transitions. [2021-06-05 04:37:50,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:37:50,165 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:37:50,165 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:37:50,365 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 486 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2587 [2021-06-05 04:37:50,366 INFO L430 AbstractCegarLoop]: === Iteration 492 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:37:50,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:37:50,366 INFO L82 PathProgramCache]: Analyzing trace with hash 1777271016, now seen corresponding path program 486 times [2021-06-05 04:37:50,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:37:50,366 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932711812] [2021-06-05 04:37:50,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:37:50,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:37:50,443 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 04:37:50,444 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:37:50,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932711812] [2021-06-05 04:37:50,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932711812] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:37:50,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30234025] [2021-06-05 04:37:50,444 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 04:37:50,470 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:37:50,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:37:50,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 04:37:50,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:37:50,556 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:50,557 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:50,557 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 17 treesize of output 13 [2021-06-05 04:37:50,558 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:37:50,560 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:50,560 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:50,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 04:37:50,561 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:37:50,563 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:50,564 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:50,564 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 18 treesize of output 14 [2021-06-05 04:37:50,565 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:37:50,567 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:50,567 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 17 treesize of output 13 [2021-06-05 04:37:50,568 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:37:50,608 INFO L628 ElimStorePlain]: treesize reduction 73, result has 38.7 percent of original size [2021-06-05 04:37:50,610 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:50,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 04:37:50,611 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:37:50,628 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:37:50,629 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 04:37:50,629 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:141, output treesize:22 [2021-06-05 04:37:50,669 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 04:37:50,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [30234025] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:37:50,669 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:37:50,669 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:37:50,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579046863] [2021-06-05 04:37:50,669 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:37:50,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:37:50,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:37:50,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:37:50,670 INFO L87 Difference]: Start difference. First operand 135 states and 290 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:37:51,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:37:51,115 INFO L93 Difference]: Finished difference Result 197 states and 415 transitions. [2021-06-05 04:37:51,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 04:37:51,115 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 04:37:51,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:37:51,115 INFO L225 Difference]: With dead ends: 197 [2021-06-05 04:37:51,115 INFO L226 Difference]: Without dead ends: 197 [2021-06-05 04:37:51,115 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 408.5ms TimeCoverageRelationStatistics Valid=132, Invalid=798, Unknown=0, NotChecked=0, Total=930 [2021-06-05 04:37:51,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-06-05 04:37:51,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 136. [2021-06-05 04:37:51,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 2.162962962962963) internal successors, (292), 135 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:37:51,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 292 transitions. [2021-06-05 04:37:51,117 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 292 transitions. Word has length 19 [2021-06-05 04:37:51,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:37:51,117 INFO L482 AbstractCegarLoop]: Abstraction has 136 states and 292 transitions. [2021-06-05 04:37:51,117 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 04:37:51,117 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 292 transitions. [2021-06-05 04:37:51,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:37:51,117 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:37:51,117 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:37:51,317 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2591,487 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:37:51,317 INFO L430 AbstractCegarLoop]: === Iteration 493 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:37:51,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:37:51,318 INFO L82 PathProgramCache]: Analyzing trace with hash -1807648510, now seen corresponding path program 487 times [2021-06-05 04:37:51,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:37:51,318 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740663259] [2021-06-05 04:37:51,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:37:51,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:37:51,402 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 04:37:51,403 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:37:51,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740663259] [2021-06-05 04:37:51,403 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740663259] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:37:51,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608141059] [2021-06-05 04:37:51,403 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 488 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 488 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:37:51,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:37:51,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:37:51,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:37:51,544 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:37:51,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [608141059] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:37:51,544 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:37:51,544 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 04:37:51,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154945364] [2021-06-05 04:37:51,544 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:37:51,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:37:51,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:37:51,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:37:51,544 INFO L87 Difference]: Start difference. First operand 136 states and 292 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:37:51,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:37:51,811 INFO L93 Difference]: Finished difference Result 156 states and 332 transitions. [2021-06-05 04:37:51,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:37:51,811 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 04:37:51,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:37:51,812 INFO L225 Difference]: With dead ends: 156 [2021-06-05 04:37:51,812 INFO L226 Difference]: Without dead ends: 156 [2021-06-05 04:37:51,812 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 300.5ms TimeCoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:37:51,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-06-05 04:37:51,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 134. [2021-06-05 04:37:51,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 2.1654135338345863) internal successors, (288), 133 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:37:51,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 288 transitions. [2021-06-05 04:37:51,813 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 288 transitions. Word has length 19 [2021-06-05 04:37:51,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:37:51,813 INFO L482 AbstractCegarLoop]: Abstraction has 134 states and 288 transitions. [2021-06-05 04:37:51,813 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 04:37:51,813 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 288 transitions. [2021-06-05 04:37:51,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:37:51,813 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:37:51,813 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:37:52,014 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2594,488 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:37:52,014 INFO L430 AbstractCegarLoop]: === Iteration 494 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:37:52,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:37:52,014 INFO L82 PathProgramCache]: Analyzing trace with hash -979582074, now seen corresponding path program 488 times [2021-06-05 04:37:52,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:37:52,014 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019378732] [2021-06-05 04:37:52,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:37:52,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:37:52,099 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:37:52,099 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:37:52,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019378732] [2021-06-05 04:37:52,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019378732] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:37:52,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53700838] [2021-06-05 04:37:52,100 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 489 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 489 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:37:52,124 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:37:52,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:37:52,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 04:37:52,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:37:52,227 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:52,228 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:52,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:37:52,228 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:37:52,231 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:52,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 04:37:52,232 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:37:52,280 INFO L628 ElimStorePlain]: treesize reduction 78, result has 39.5 percent of original size [2021-06-05 04:37:52,281 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 04:37:52,283 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:52,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 04:37:52,284 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:37:52,299 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:37:52,301 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:52,301 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 12 treesize of output 8 [2021-06-05 04:37:52,302 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:37:52,317 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:37:52,318 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 04:37:52,318 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:141, output treesize:22 [2021-06-05 04:37:52,360 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 04:37:52,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [53700838] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:37:52,360 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:37:52,360 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:37:52,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101673353] [2021-06-05 04:37:52,361 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:37:52,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:37:52,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:37:52,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:37:52,361 INFO L87 Difference]: Start difference. First operand 134 states and 288 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:37:52,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:37:52,595 INFO L93 Difference]: Finished difference Result 181 states and 373 transitions. [2021-06-05 04:37:52,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 04:37:52,595 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 04:37:52,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:37:52,595 INFO L225 Difference]: With dead ends: 181 [2021-06-05 04:37:52,595 INFO L226 Difference]: Without dead ends: 181 [2021-06-05 04:37:52,596 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 276.4ms TimeCoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:37:52,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-06-05 04:37:52,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 134. [2021-06-05 04:37:52,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 2.1654135338345863) internal successors, (288), 133 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:37:52,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 288 transitions. [2021-06-05 04:37:52,597 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 288 transitions. Word has length 19 [2021-06-05 04:37:52,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:37:52,597 INFO L482 AbstractCegarLoop]: Abstraction has 134 states and 288 transitions. [2021-06-05 04:37:52,597 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 04:37:52,597 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 288 transitions. [2021-06-05 04:37:52,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:37:52,598 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:37:52,598 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:37:52,804 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2604,489 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:37:52,805 INFO L430 AbstractCegarLoop]: === Iteration 495 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:37:52,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:37:52,805 INFO L82 PathProgramCache]: Analyzing trace with hash 1030603636, now seen corresponding path program 489 times [2021-06-05 04:37:52,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:37:52,805 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493978480] [2021-06-05 04:37:52,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:37:52,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:37:52,883 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:37:52,883 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:37:52,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493978480] [2021-06-05 04:37:52,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493978480] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:37:52,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930409632] [2021-06-05 04:37:52,883 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 490 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 490 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:37:52,908 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:37:52,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:37:52,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:37:52,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:37:53,055 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 04:37:53,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [930409632] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:37:53,056 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:37:53,056 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:37:53,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422395450] [2021-06-05 04:37:53,056 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:37:53,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:37:53,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:37:53,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:37:53,056 INFO L87 Difference]: Start difference. First operand 134 states and 288 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:37:53,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:37:53,381 INFO L93 Difference]: Finished difference Result 220 states and 451 transitions. [2021-06-05 04:37:53,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:37:53,382 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 04:37:53,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:37:53,382 INFO L225 Difference]: With dead ends: 220 [2021-06-05 04:37:53,382 INFO L226 Difference]: Without dead ends: 220 [2021-06-05 04:37:53,382 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 293.7ms TimeCoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:37:53,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2021-06-05 04:37:53,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 135. [2021-06-05 04:37:53,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 2.1865671641791047) internal successors, (293), 134 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:37:53,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 293 transitions. [2021-06-05 04:37:53,383 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 293 transitions. Word has length 19 [2021-06-05 04:37:53,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:37:53,383 INFO L482 AbstractCegarLoop]: Abstraction has 135 states and 293 transitions. [2021-06-05 04:37:53,383 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 04:37:53,383 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 293 transitions. [2021-06-05 04:37:53,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:37:53,384 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:37:53,384 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:37:53,584 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 490 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2608 [2021-06-05 04:37:53,584 INFO L430 AbstractCegarLoop]: === Iteration 496 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:37:53,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:37:53,584 INFO L82 PathProgramCache]: Analyzing trace with hash -1852517328, now seen corresponding path program 490 times [2021-06-05 04:37:53,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:37:53,584 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540137106] [2021-06-05 04:37:53,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:37:53,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:37:53,663 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:37:53,663 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:37:53,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540137106] [2021-06-05 04:37:53,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540137106] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:37:53,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1073352008] [2021-06-05 04:37:53,663 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 491 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 491 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:37:53,688 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:37:53,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:37:53,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:37:53,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:37:53,821 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 04:37:53,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1073352008] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:37:53,821 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:37:53,821 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 04:37:53,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559215833] [2021-06-05 04:37:53,821 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:37:53,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:37:53,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:37:53,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:37:53,821 INFO L87 Difference]: Start difference. First operand 135 states and 293 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:37:54,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:37:54,104 INFO L93 Difference]: Finished difference Result 144 states and 307 transitions. [2021-06-05 04:37:54,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:37:54,105 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 04:37:54,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:37:54,105 INFO L225 Difference]: With dead ends: 144 [2021-06-05 04:37:54,105 INFO L226 Difference]: Without dead ends: 140 [2021-06-05 04:37:54,105 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 307.5ms TimeCoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:37:54,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-06-05 04:37:54,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 135. [2021-06-05 04:37:54,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 2.1791044776119404) internal successors, (292), 134 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:37:54,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 292 transitions. [2021-06-05 04:37:54,106 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 292 transitions. Word has length 19 [2021-06-05 04:37:54,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:37:54,106 INFO L482 AbstractCegarLoop]: Abstraction has 135 states and 292 transitions. [2021-06-05 04:37:54,106 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 04:37:54,106 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 292 transitions. [2021-06-05 04:37:54,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:37:54,107 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:37:54,107 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:37:54,307 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2618,491 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:37:54,307 INFO L430 AbstractCegarLoop]: === Iteration 497 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:37:54,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:37:54,307 INFO L82 PathProgramCache]: Analyzing trace with hash -1765636094, now seen corresponding path program 491 times [2021-06-05 04:37:54,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:37:54,307 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835457496] [2021-06-05 04:37:54,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:37:54,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:37:54,382 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:37:54,382 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:37:54,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835457496] [2021-06-05 04:37:54,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835457496] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:37:54,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186385399] [2021-06-05 04:37:54,382 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 492 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 492 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:37:54,407 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 04:37:54,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:37:54,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:37:54,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:37:54,522 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:37:54,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [186385399] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:37:54,522 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:37:54,522 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 04:37:54,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110233005] [2021-06-05 04:37:54,522 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:37:54,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:37:54,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:37:54,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:37:54,522 INFO L87 Difference]: Start difference. First operand 135 states and 292 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:37:54,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:37:54,677 INFO L93 Difference]: Finished difference Result 172 states and 363 transitions. [2021-06-05 04:37:54,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:37:54,678 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 04:37:54,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:37:54,678 INFO L225 Difference]: With dead ends: 172 [2021-06-05 04:37:54,678 INFO L226 Difference]: Without dead ends: 172 [2021-06-05 04:37:54,678 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 190.2ms TimeCoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:37:54,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-06-05 04:37:54,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 130. [2021-06-05 04:37:54,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 129 states have (on average 2.1627906976744184) internal successors, (279), 129 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:37:54,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 279 transitions. [2021-06-05 04:37:54,679 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 279 transitions. Word has length 19 [2021-06-05 04:37:54,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:37:54,679 INFO L482 AbstractCegarLoop]: Abstraction has 130 states and 279 transitions. [2021-06-05 04:37:54,679 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 04:37:54,680 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 279 transitions. [2021-06-05 04:37:54,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:37:54,680 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:37:54,680 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:37:54,880 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 492 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2624 [2021-06-05 04:37:54,880 INFO L430 AbstractCegarLoop]: === Iteration 498 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:37:54,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:37:54,880 INFO L82 PathProgramCache]: Analyzing trace with hash 447244630, now seen corresponding path program 492 times [2021-06-05 04:37:54,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:37:54,881 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059199028] [2021-06-05 04:37:54,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:37:54,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:37:54,952 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:37:54,952 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:37:54,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059199028] [2021-06-05 04:37:54,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059199028] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:37:54,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943912404] [2021-06-05 04:37:54,952 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 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 04:37:54,977 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:37:54,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:37:54,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:37:54,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:37:55,081 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:55,082 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:55,082 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 04:37:55,083 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:37:55,084 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:55,084 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 04:37:55,085 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:37:55,099 INFO L628 ElimStorePlain]: treesize reduction 29, result has 32.6 percent of original size [2021-06-05 04:37:55,099 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 04:37:55,100 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 04:37:55,100 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:57, output treesize:6 [2021-06-05 04:37:55,104 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 04:37:55,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [943912404] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:37:55,104 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:37:55,104 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 04:37:55,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866471484] [2021-06-05 04:37:55,104 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:37:55,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:37:55,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:37:55,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:37:55,104 INFO L87 Difference]: Start difference. First operand 130 states and 279 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:37:55,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:37:55,311 INFO L93 Difference]: Finished difference Result 171 states and 361 transitions. [2021-06-05 04:37:55,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:37:55,312 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 04:37:55,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:37:55,312 INFO L225 Difference]: With dead ends: 171 [2021-06-05 04:37:55,312 INFO L226 Difference]: Without dead ends: 171 [2021-06-05 04:37:55,312 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 216.4ms TimeCoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:37:55,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-06-05 04:37:55,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 132. [2021-06-05 04:37:55,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 2.1603053435114505) internal successors, (283), 131 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:37:55,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 283 transitions. [2021-06-05 04:37:55,313 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 283 transitions. Word has length 19 [2021-06-05 04:37:55,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:37:55,313 INFO L482 AbstractCegarLoop]: Abstraction has 132 states and 283 transitions. [2021-06-05 04:37:55,313 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 04:37:55,313 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 283 transitions. [2021-06-05 04:37:55,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:37:55,313 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:37:55,313 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:37:55,514 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2628,493 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:37:55,514 INFO L430 AbstractCegarLoop]: === Iteration 499 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:37:55,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:37:55,514 INFO L82 PathProgramCache]: Analyzing trace with hash 87328112, now seen corresponding path program 493 times [2021-06-05 04:37:55,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:37:55,514 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828736840] [2021-06-05 04:37:55,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:37:55,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:37:55,593 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:37:55,593 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:37:55,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828736840] [2021-06-05 04:37:55,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828736840] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:37:55,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388394844] [2021-06-05 04:37:55,593 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 04:37:55,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:37:55,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:37:55,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:37:55,717 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:55,718 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:55,718 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 16 treesize of output 12 [2021-06-05 04:37:55,719 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:37:55,721 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:55,721 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:55,721 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 04:37:55,722 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:37:55,724 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:55,724 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:55,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:37:55,725 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:37:55,727 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:55,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:37:55,728 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:37:55,759 INFO L628 ElimStorePlain]: treesize reduction 53, result has 36.9 percent of original size [2021-06-05 04:37:55,760 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 04:37:55,760 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:37:55,760 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:121, output treesize:15 [2021-06-05 04:37:55,795 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:37:55,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [388394844] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:37:55,795 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:37:55,795 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:37:55,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382931130] [2021-06-05 04:37:55,796 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:37:55,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:37:55,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:37:55,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:37:55,796 INFO L87 Difference]: Start difference. First operand 132 states and 283 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:37:56,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:37:56,079 INFO L93 Difference]: Finished difference Result 187 states and 394 transitions. [2021-06-05 04:37:56,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:37:56,080 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 04:37:56,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:37:56,080 INFO L225 Difference]: With dead ends: 187 [2021-06-05 04:37:56,080 INFO L226 Difference]: Without dead ends: 187 [2021-06-05 04:37:56,080 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 263.0ms TimeCoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:37:56,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-06-05 04:37:56,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 133. [2021-06-05 04:37:56,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 2.159090909090909) internal successors, (285), 132 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:37:56,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 285 transitions. [2021-06-05 04:37:56,081 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 285 transitions. Word has length 19 [2021-06-05 04:37:56,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:37:56,082 INFO L482 AbstractCegarLoop]: Abstraction has 133 states and 285 transitions. [2021-06-05 04:37:56,082 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 04:37:56,082 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 285 transitions. [2021-06-05 04:37:56,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:37:56,082 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:37:56,082 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:37:56,282 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 494 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2632 [2021-06-05 04:37:56,282 INFO L430 AbstractCegarLoop]: === Iteration 500 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:37:56,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:37:56,283 INFO L82 PathProgramCache]: Analyzing trace with hash 797375882, now seen corresponding path program 494 times [2021-06-05 04:37:56,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:37:56,283 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053790765] [2021-06-05 04:37:56,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:37:56,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:37:56,367 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:37:56,367 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:37:56,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053790765] [2021-06-05 04:37:56,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053790765] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:37:56,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1250476528] [2021-06-05 04:37:56,367 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 495 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 495 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:37:56,393 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:37:56,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:37:56,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 04:37:56,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:37:56,481 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:56,481 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:56,482 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 17 treesize of output 13 [2021-06-05 04:37:56,482 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:37:56,484 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:56,485 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:56,485 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 18 treesize of output 14 [2021-06-05 04:37:56,486 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:37:56,488 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:56,488 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:56,488 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 17 treesize of output 13 [2021-06-05 04:37:56,489 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:37:56,491 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:56,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 04:37:56,492 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:37:56,531 INFO L628 ElimStorePlain]: treesize reduction 59, result has 43.8 percent of original size [2021-06-05 04:37:56,533 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:56,533 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:56,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:37:56,535 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:37:56,537 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:56,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-06-05 04:37:56,538 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:37:56,554 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:37:56,555 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 04:37:56,555 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:133, output treesize:22 [2021-06-05 04:37:56,595 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 04:37:56,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1250476528] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:37:56,595 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:37:56,595 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:37:56,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689027493] [2021-06-05 04:37:56,596 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:37:56,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:37:56,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:37:56,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:37:56,596 INFO L87 Difference]: Start difference. First operand 133 states and 285 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:37:56,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:37:56,767 INFO L93 Difference]: Finished difference Result 154 states and 327 transitions. [2021-06-05 04:37:56,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:37:56,767 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 04:37:56,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:37:56,767 INFO L225 Difference]: With dead ends: 154 [2021-06-05 04:37:56,767 INFO L226 Difference]: Without dead ends: 154 [2021-06-05 04:37:56,767 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 226.9ms TimeCoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:37:56,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-06-05 04:37:56,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 131. [2021-06-05 04:37:56,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 130 states have (on average 2.1615384615384614) internal successors, (281), 130 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:37:56,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 281 transitions. [2021-06-05 04:37:56,769 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 281 transitions. Word has length 19 [2021-06-05 04:37:56,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:37:56,769 INFO L482 AbstractCegarLoop]: Abstraction has 131 states and 281 transitions. [2021-06-05 04:37:56,769 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 04:37:56,769 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 281 transitions. [2021-06-05 04:37:56,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:37:56,769 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:37:56,769 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:37:56,969 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 495 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2642 [2021-06-05 04:37:56,969 INFO L430 AbstractCegarLoop]: === Iteration 501 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:37:56,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:37:56,970 INFO L82 PathProgramCache]: Analyzing trace with hash -2019456008, now seen corresponding path program 495 times [2021-06-05 04:37:56,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:37:56,970 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308029500] [2021-06-05 04:37:56,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:37:56,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:37:57,049 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:37:57,050 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:37:57,050 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308029500] [2021-06-05 04:37:57,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308029500] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:37:57,050 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231872002] [2021-06-05 04:37:57,050 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 496 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 496 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:37:57,075 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:37:57,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:37:57,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:37:57,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:37:57,183 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:57,183 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:57,184 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 16 treesize of output 12 [2021-06-05 04:37:57,184 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:37:57,187 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:57,187 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 17 treesize of output 13 [2021-06-05 04:37:57,188 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:37:57,224 INFO L628 ElimStorePlain]: treesize reduction 60, result has 38.8 percent of original size [2021-06-05 04:37:57,224 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 04:37:57,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index 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 04:37:57,227 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:37:57,239 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:37:57,239 INFO L518 ElimStorePlain]: Eliminatee v_prenex_396 vanished before elimination [2021-06-05 04:37:57,240 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 04:37:57,240 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-06-05 04:37:57,265 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:37:57,265 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [231872002] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:37:57,265 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:37:57,265 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 04:37:57,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089379763] [2021-06-05 04:37:57,265 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:37:57,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:37:57,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:37:57,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:37:57,266 INFO L87 Difference]: Start difference. First operand 131 states and 281 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:37:57,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:37:57,581 INFO L93 Difference]: Finished difference Result 172 states and 357 transitions. [2021-06-05 04:37:57,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:37:57,581 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 04:37:57,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:37:57,582 INFO L225 Difference]: With dead ends: 172 [2021-06-05 04:37:57,582 INFO L226 Difference]: Without dead ends: 172 [2021-06-05 04:37:57,582 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 324.8ms TimeCoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:37:57,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-06-05 04:37:57,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 133. [2021-06-05 04:37:57,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 2.1666666666666665) internal successors, (286), 132 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:37:57,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 286 transitions. [2021-06-05 04:37:57,583 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 286 transitions. Word has length 19 [2021-06-05 04:37:57,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:37:57,583 INFO L482 AbstractCegarLoop]: Abstraction has 133 states and 286 transitions. [2021-06-05 04:37:57,583 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 04:37:57,583 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 286 transitions. [2021-06-05 04:37:57,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:37:57,583 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:37:57,583 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:37:57,783 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2646,496 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:37:57,784 INFO L430 AbstractCegarLoop]: === Iteration 502 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:37:57,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:37:57,784 INFO L82 PathProgramCache]: Analyzing trace with hash -659339268, now seen corresponding path program 496 times [2021-06-05 04:37:57,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:37:57,784 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223750076] [2021-06-05 04:37:57,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:37:57,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:37:57,863 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:37:57,863 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:37:57,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223750076] [2021-06-05 04:37:57,863 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223750076] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:37:57,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851746036] [2021-06-05 04:37:57,863 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 497 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 497 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:37:57,887 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:37:57,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:37:57,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:37:57,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:37:58,035 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 04:37:58,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [851746036] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:37:58,036 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:37:58,036 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:37:58,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073359840] [2021-06-05 04:37:58,036 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:37:58,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:37:58,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:37:58,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:37:58,036 INFO L87 Difference]: Start difference. First operand 133 states and 286 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:37:58,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:37:58,447 INFO L93 Difference]: Finished difference Result 212 states and 433 transitions. [2021-06-05 04:37:58,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:37:58,448 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 04:37:58,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:37:58,448 INFO L225 Difference]: With dead ends: 212 [2021-06-05 04:37:58,448 INFO L226 Difference]: Without dead ends: 212 [2021-06-05 04:37:58,448 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 376.5ms TimeCoverageRelationStatistics Valid=110, Invalid=646, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:37:58,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2021-06-05 04:37:58,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 134. [2021-06-05 04:37:58,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 2.18796992481203) internal successors, (291), 133 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:37:58,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 291 transitions. [2021-06-05 04:37:58,450 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 291 transitions. Word has length 19 [2021-06-05 04:37:58,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:37:58,450 INFO L482 AbstractCegarLoop]: Abstraction has 134 states and 291 transitions. [2021-06-05 04:37:58,450 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 04:37:58,450 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 291 transitions. [2021-06-05 04:37:58,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:37:58,450 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:37:58,450 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:37:58,650 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 497 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2653 [2021-06-05 04:37:58,651 INFO L430 AbstractCegarLoop]: === Iteration 503 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:37:58,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:37:58,651 INFO L82 PathProgramCache]: Analyzing trace with hash 752507064, now seen corresponding path program 497 times [2021-06-05 04:37:58,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:37:58,651 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523147670] [2021-06-05 04:37:58,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:37:58,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:37:58,738 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:37:58,738 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:37:58,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523147670] [2021-06-05 04:37:58,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523147670] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:37:58,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405430802] [2021-06-05 04:37:58,738 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 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 04:37:58,763 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:37:58,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:37:58,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 04:37:58,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:37:58,886 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:37:58,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [405430802] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:37:58,886 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:37:58,886 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 04:37:58,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120664416] [2021-06-05 04:37:58,886 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:37:58,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:37:58,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:37:58,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:37:58,886 INFO L87 Difference]: Start difference. First operand 134 states and 291 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:37:59,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:37:59,127 INFO L93 Difference]: Finished difference Result 140 states and 299 transitions. [2021-06-05 04:37:59,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:37:59,127 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 04:37:59,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:37:59,128 INFO L225 Difference]: With dead ends: 140 [2021-06-05 04:37:59,128 INFO L226 Difference]: Without dead ends: 136 [2021-06-05 04:37:59,128 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 263.8ms TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:37:59,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-06-05 04:37:59,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 134. [2021-06-05 04:37:59,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 2.180451127819549) internal successors, (290), 133 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:37:59,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 290 transitions. [2021-06-05 04:37:59,129 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 290 transitions. Word has length 19 [2021-06-05 04:37:59,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:37:59,129 INFO L482 AbstractCegarLoop]: Abstraction has 134 states and 290 transitions. [2021-06-05 04:37:59,129 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 04:37:59,129 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 290 transitions. [2021-06-05 04:37:59,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:37:59,129 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:37:59,129 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:37:59,330 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 498 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2665 [2021-06-05 04:37:59,330 INFO L430 AbstractCegarLoop]: === Iteration 504 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:37:59,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:37:59,330 INFO L82 PathProgramCache]: Analyzing trace with hash 839388298, now seen corresponding path program 498 times [2021-06-05 04:37:59,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:37:59,330 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705085823] [2021-06-05 04:37:59,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:37:59,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:37:59,407 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:37:59,407 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:37:59,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705085823] [2021-06-05 04:37:59,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705085823] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:37:59,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515402741] [2021-06-05 04:37:59,407 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 499 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 499 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:37:59,432 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:37:59,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:37:59,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 04:37:59,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:37:59,537 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:59,537 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:59,538 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 17 treesize of output 13 [2021-06-05 04:37:59,538 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:37:59,540 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:59,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:37:59,541 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:37:59,559 INFO L628 ElimStorePlain]: treesize reduction 28, result has 42.9 percent of original size [2021-06-05 04:37:59,560 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:59,560 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 9 treesize of output 5 [2021-06-05 04:37:59,562 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:37:59,567 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:37:59,568 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:37:59,568 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:63, output treesize:9 [2021-06-05 04:37:59,585 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:37:59,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1515402741] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:37:59,585 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:37:59,585 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:37:59,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495913429] [2021-06-05 04:37:59,586 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:37:59,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:37:59,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:37:59,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:37:59,586 INFO L87 Difference]: Start difference. First operand 134 states and 290 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:37:59,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:37:59,775 INFO L93 Difference]: Finished difference Result 166 states and 351 transitions. [2021-06-05 04:37:59,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:37:59,775 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 04:37:59,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:37:59,775 INFO L225 Difference]: With dead ends: 166 [2021-06-05 04:37:59,775 INFO L226 Difference]: Without dead ends: 166 [2021-06-05 04:37:59,775 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 209.7ms TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:37:59,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-06-05 04:37:59,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 130. [2021-06-05 04:37:59,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 129 states have (on average 2.1627906976744184) internal successors, (279), 129 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:37:59,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 279 transitions. [2021-06-05 04:37:59,777 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 279 transitions. Word has length 19 [2021-06-05 04:37:59,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:37:59,777 INFO L482 AbstractCegarLoop]: Abstraction has 130 states and 279 transitions. [2021-06-05 04:37:59,777 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 04:37:59,777 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 279 transitions. [2021-06-05 04:37:59,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:37:59,777 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:37:59,777 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:37:59,977 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 499 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2669 [2021-06-05 04:37:59,977 INFO L430 AbstractCegarLoop]: === Iteration 505 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:37:59,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:37:59,978 INFO L82 PathProgramCache]: Analyzing trace with hash 739644038, now seen corresponding path program 499 times [2021-06-05 04:37:59,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:37:59,978 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722109296] [2021-06-05 04:37:59,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:37:59,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:38:00,064 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:38:00,065 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:38:00,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722109296] [2021-06-05 04:38:00,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722109296] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:38:00,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900133134] [2021-06-05 04:38:00,065 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 500 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 500 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:38:00,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:38:00,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:38:00,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:38:00,221 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:38:00,221 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:38:00,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:38:00,222 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:38:00,225 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:38:00,225 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 17 treesize of output 13 [2021-06-05 04:38:00,226 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:38:00,262 INFO L628 ElimStorePlain]: treesize reduction 60, result has 38.8 percent of original size [2021-06-05 04:38:00,262 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 04:38:00,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index 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 04:38:00,264 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:38:00,277 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:38:00,277 INFO L518 ElimStorePlain]: Eliminatee v_prenex_400 vanished before elimination [2021-06-05 04:38:00,277 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 04:38:00,277 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-06-05 04:38:00,317 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 04:38:00,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1900133134] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:38:00,318 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:38:00,318 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:38:00,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138781299] [2021-06-05 04:38:00,318 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:38:00,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:38:00,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:38:00,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:38:00,318 INFO L87 Difference]: Start difference. First operand 130 states and 279 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:38:00,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:38:00,772 INFO L93 Difference]: Finished difference Result 172 states and 353 transitions. [2021-06-05 04:38:00,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:38:00,772 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 04:38:00,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:38:00,773 INFO L225 Difference]: With dead ends: 172 [2021-06-05 04:38:00,773 INFO L226 Difference]: Without dead ends: 172 [2021-06-05 04:38:00,773 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 438.6ms TimeCoverageRelationStatistics Valid=86, Invalid=564, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:38:00,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-06-05 04:38:00,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 129. [2021-06-05 04:38:00,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 2.1640625) internal successors, (277), 128 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:38:00,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 277 transitions. [2021-06-05 04:38:00,774 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 277 transitions. Word has length 19 [2021-06-05 04:38:00,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:38:00,774 INFO L482 AbstractCegarLoop]: Abstraction has 129 states and 277 transitions. [2021-06-05 04:38:00,774 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 04:38:00,774 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 277 transitions. [2021-06-05 04:38:00,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:38:00,774 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:38:00,774 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:38:00,974 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2671,500 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:38:00,975 INFO L430 AbstractCegarLoop]: === Iteration 506 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:38:00,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:38:00,975 INFO L82 PathProgramCache]: Analyzing trace with hash -133291216, now seen corresponding path program 500 times [2021-06-05 04:38:00,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:38:00,975 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443285294] [2021-06-05 04:38:00,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:38:00,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:38:01,066 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:38:01,066 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:38:01,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443285294] [2021-06-05 04:38:01,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443285294] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:38:01,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548076730] [2021-06-05 04:38:01,066 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 501 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 501 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:38:01,091 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:38:01,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:38:01,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:38:01,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:38:01,238 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:38:01,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [548076730] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:38:01,238 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:38:01,238 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 04:38:01,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631937078] [2021-06-05 04:38:01,238 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:38:01,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:38:01,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:38:01,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:38:01,238 INFO L87 Difference]: Start difference. First operand 129 states and 277 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:38:01,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:38:01,669 INFO L93 Difference]: Finished difference Result 140 states and 293 transitions. [2021-06-05 04:38:01,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:38:01,670 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 04:38:01,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:38:01,670 INFO L225 Difference]: With dead ends: 140 [2021-06-05 04:38:01,670 INFO L226 Difference]: Without dead ends: 136 [2021-06-05 04:38:01,670 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 415.4ms TimeCoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:38:01,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-06-05 04:38:01,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 129. [2021-06-05 04:38:01,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 2.15625) internal successors, (276), 128 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:38:01,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 276 transitions. [2021-06-05 04:38:01,671 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 276 transitions. Word has length 19 [2021-06-05 04:38:01,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:38:01,671 INFO L482 AbstractCegarLoop]: Abstraction has 129 states and 276 transitions. [2021-06-05 04:38:01,671 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 04:38:01,671 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 276 transitions. [2021-06-05 04:38:01,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:38:01,671 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:38:01,671 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:38:01,872 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2678,501 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:38:01,872 INFO L430 AbstractCegarLoop]: === Iteration 507 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:38:01,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:38:01,872 INFO L82 PathProgramCache]: Analyzing trace with hash -46409982, now seen corresponding path program 501 times [2021-06-05 04:38:01,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:38:01,872 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348325764] [2021-06-05 04:38:01,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:38:01,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:38:01,968 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:38:01,968 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:38:01,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348325764] [2021-06-05 04:38:01,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348325764] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:38:01,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835320047] [2021-06-05 04:38:01,968 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 502 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 502 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:38:01,993 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:38:01,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:38:01,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:38:01,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:38:02,125 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 04:38:02,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1835320047] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:38:02,125 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:38:02,125 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 04:38:02,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104541704] [2021-06-05 04:38:02,125 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:38:02,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:38:02,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:38:02,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:38:02,126 INFO L87 Difference]: Start difference. First operand 129 states and 276 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:38:02,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:38:02,502 INFO L93 Difference]: Finished difference Result 201 states and 419 transitions. [2021-06-05 04:38:02,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:38:02,502 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 04:38:02,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:38:02,502 INFO L225 Difference]: With dead ends: 201 [2021-06-05 04:38:02,502 INFO L226 Difference]: Without dead ends: 201 [2021-06-05 04:38:02,503 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 366.4ms TimeCoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:38:02,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2021-06-05 04:38:02,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 130. [2021-06-05 04:38:02,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 129 states have (on average 2.1705426356589146) internal successors, (280), 129 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:38:02,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 280 transitions. [2021-06-05 04:38:02,504 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 280 transitions. Word has length 19 [2021-06-05 04:38:02,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:38:02,504 INFO L482 AbstractCegarLoop]: Abstraction has 130 states and 280 transitions. [2021-06-05 04:38:02,504 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 04:38:02,504 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 280 transitions. [2021-06-05 04:38:02,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:38:02,504 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:38:02,504 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:38:02,704 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 502 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2683 [2021-06-05 04:38:02,705 INFO L430 AbstractCegarLoop]: === Iteration 508 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:38:02,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:38:02,705 INFO L82 PathProgramCache]: Analyzing trace with hash -639637482, now seen corresponding path program 502 times [2021-06-05 04:38:02,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:38:02,705 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574372757] [2021-06-05 04:38:02,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:38:02,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:38:02,781 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:38:02,782 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:38:02,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574372757] [2021-06-05 04:38:02,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574372757] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:38:02,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101592389] [2021-06-05 04:38:02,782 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 503 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 503 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:38:02,806 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:38:02,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:38:02,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:38:02,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:38:02,935 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:38:02,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1101592389] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:38:02,935 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:38:02,935 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 04:38:02,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572872821] [2021-06-05 04:38:02,935 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:38:02,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:38:02,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:38:02,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:38:02,935 INFO L87 Difference]: Start difference. First operand 130 states and 280 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:38:03,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:38:03,200 INFO L93 Difference]: Finished difference Result 137 states and 289 transitions. [2021-06-05 04:38:03,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:38:03,200 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 04:38:03,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:38:03,200 INFO L225 Difference]: With dead ends: 137 [2021-06-05 04:38:03,200 INFO L226 Difference]: Without dead ends: 131 [2021-06-05 04:38:03,201 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 291.5ms TimeCoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:38:03,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-06-05 04:38:03,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 130. [2021-06-05 04:38:03,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 129 states have (on average 2.1627906976744184) internal successors, (279), 129 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:38:03,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 279 transitions. [2021-06-05 04:38:03,202 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 279 transitions. Word has length 19 [2021-06-05 04:38:03,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:38:03,202 INFO L482 AbstractCegarLoop]: Abstraction has 130 states and 279 transitions. [2021-06-05 04:38:03,202 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 04:38:03,202 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 279 transitions. [2021-06-05 04:38:03,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:38:03,202 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:38:03,202 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:38:03,402 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 503 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2687 [2021-06-05 04:38:03,403 INFO L430 AbstractCegarLoop]: === Iteration 509 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:38:03,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:38:03,403 INFO L82 PathProgramCache]: Analyzing trace with hash 2141773194, now seen corresponding path program 503 times [2021-06-05 04:38:03,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:38:03,403 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363682317] [2021-06-05 04:38:03,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:38:03,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:38:03,473 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:38:03,473 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:38:03,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363682317] [2021-06-05 04:38:03,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363682317] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:38:03,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103015504] [2021-06-05 04:38:03,473 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 504 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 504 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:38:03,498 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:38:03,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:38:03,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:38:03,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:38:03,638 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:38:03,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1103015504] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:38:03,639 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:38:03,639 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 04:38:03,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156638226] [2021-06-05 04:38:03,639 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:38:03,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:38:03,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:38:03,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:38:03,639 INFO L87 Difference]: Start difference. First operand 130 states and 279 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:38:03,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:38:03,869 INFO L93 Difference]: Finished difference Result 168 states and 356 transitions. [2021-06-05 04:38:03,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:38:03,869 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 04:38:03,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:38:03,869 INFO L225 Difference]: With dead ends: 168 [2021-06-05 04:38:03,869 INFO L226 Difference]: Without dead ends: 168 [2021-06-05 04:38:03,869 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 174.2ms TimeCoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:38:03,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-06-05 04:38:03,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 125. [2021-06-05 04:38:03,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 2.153225806451613) internal successors, (267), 124 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:38:03,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 267 transitions. [2021-06-05 04:38:03,870 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 267 transitions. Word has length 19 [2021-06-05 04:38:03,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:38:03,871 INFO L482 AbstractCegarLoop]: Abstraction has 125 states and 267 transitions. [2021-06-05 04:38:03,871 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 04:38:03,871 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 267 transitions. [2021-06-05 04:38:03,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:38:03,871 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:38:03,871 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:38:04,071 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2692,504 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:38:04,071 INFO L430 AbstractCegarLoop]: === Iteration 510 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:38:04,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:38:04,071 INFO L82 PathProgramCache]: Analyzing trace with hash -401377842, now seen corresponding path program 504 times [2021-06-05 04:38:04,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:38:04,072 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769507908] [2021-06-05 04:38:04,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:38:04,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:38:04,161 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:38:04,161 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:38:04,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769507908] [2021-06-05 04:38:04,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769507908] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:38:04,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785997888] [2021-06-05 04:38:04,161 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 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 04:38:04,187 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 04:38:04,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:38:04,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 04:38:04,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:38:04,285 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:38:04,285 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:38:04,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:38:04,286 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:38:04,288 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:38:04,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:38:04,289 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:38:04,306 INFO L628 ElimStorePlain]: treesize reduction 38, result has 30.9 percent of original size [2021-06-05 04:38:04,306 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 04:38:04,306 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 04:38:04,306 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:67, output treesize:9 [2021-06-05 04:38:04,322 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 04:38:04,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1785997888] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:38:04,323 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:38:04,323 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:38:04,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850522456] [2021-06-05 04:38:04,323 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:38:04,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:38:04,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:38:04,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:38:04,323 INFO L87 Difference]: Start difference. First operand 125 states and 267 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:38:04,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:38:04,591 INFO L93 Difference]: Finished difference Result 167 states and 351 transitions. [2021-06-05 04:38:04,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:38:04,592 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 04:38:04,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:38:04,592 INFO L225 Difference]: With dead ends: 167 [2021-06-05 04:38:04,592 INFO L226 Difference]: Without dead ends: 167 [2021-06-05 04:38:04,592 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 261.7ms TimeCoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:38:04,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-06-05 04:38:04,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 126. [2021-06-05 04:38:04,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 2.152) internal successors, (269), 125 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:38:04,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 269 transitions. [2021-06-05 04:38:04,593 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 269 transitions. Word has length 19 [2021-06-05 04:38:04,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:38:04,593 INFO L482 AbstractCegarLoop]: Abstraction has 126 states and 269 transitions. [2021-06-05 04:38:04,593 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 04:38:04,593 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 269 transitions. [2021-06-05 04:38:04,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:38:04,594 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:38:04,594 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:38:04,794 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 505 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2696 [2021-06-05 04:38:04,794 INFO L430 AbstractCegarLoop]: === Iteration 511 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:38:04,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:38:04,794 INFO L82 PathProgramCache]: Analyzing trace with hash -761294360, now seen corresponding path program 505 times [2021-06-05 04:38:04,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:38:04,795 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187983274] [2021-06-05 04:38:04,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:38:04,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:38:04,876 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:38:04,876 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:38:04,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187983274] [2021-06-05 04:38:04,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187983274] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:38:04,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453319676] [2021-06-05 04:38:04,877 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 04:38:04,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:38:04,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:38:04,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:38:05,003 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:38:05,004 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:38:05,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:38:05,005 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:38:05,007 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:38:05,007 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:38:05,007 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 17 treesize of output 13 [2021-06-05 04:38:05,008 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:38:05,010 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:38:05,010 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:38:05,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:38:05,011 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:38:05,013 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:38:05,013 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 04:38:05,014 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:38:05,045 INFO L628 ElimStorePlain]: treesize reduction 53, result has 36.9 percent of original size [2021-06-05 04:38:05,045 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 04:38:05,046 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 04:38:05,046 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:121, output treesize:15 [2021-06-05 04:38:05,081 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:38:05,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1453319676] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:38:05,081 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:38:05,081 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:38:05,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475286850] [2021-06-05 04:38:05,081 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:38:05,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:38:05,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:38:05,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:38:05,082 INFO L87 Difference]: Start difference. First operand 126 states and 269 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:38:05,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:38:05,370 INFO L93 Difference]: Finished difference Result 183 states and 384 transitions. [2021-06-05 04:38:05,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:38:05,370 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 04:38:05,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:38:05,371 INFO L225 Difference]: With dead ends: 183 [2021-06-05 04:38:05,371 INFO L226 Difference]: Without dead ends: 183 [2021-06-05 04:38:05,371 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 281.0ms TimeCoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:38:05,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-06-05 04:38:05,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 127. [2021-06-05 04:38:05,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 126 states have (on average 2.1507936507936507) internal successors, (271), 126 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:38:05,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 271 transitions. [2021-06-05 04:38:05,372 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 271 transitions. Word has length 19 [2021-06-05 04:38:05,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:38:05,372 INFO L482 AbstractCegarLoop]: Abstraction has 127 states and 271 transitions. [2021-06-05 04:38:05,372 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 04:38:05,372 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 271 transitions. [2021-06-05 04:38:05,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:38:05,372 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:38:05,372 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:38:05,573 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 506 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2697 [2021-06-05 04:38:05,573 INFO L430 AbstractCegarLoop]: === Iteration 512 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:38:05,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:38:05,573 INFO L82 PathProgramCache]: Analyzing trace with hash -51246590, now seen corresponding path program 506 times [2021-06-05 04:38:05,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:38:05,573 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980900381] [2021-06-05 04:38:05,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:38:05,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:38:05,660 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:38:05,660 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:38:05,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980900381] [2021-06-05 04:38:05,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980900381] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:38:05,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171952270] [2021-06-05 04:38:05,661 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 04:38:05,685 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:38:05,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:38:05,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 04:38:05,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:38:05,776 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:38:05,776 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:38:05,777 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 17 treesize of output 13 [2021-06-05 04:38:05,777 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:38:05,779 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:38:05,780 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:38:05,780 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 18 treesize of output 14 [2021-06-05 04:38:05,781 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:38:05,783 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:38:05,783 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:38:05,783 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 18 treesize of output 14 [2021-06-05 04:38:05,784 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:38:05,786 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:38:05,786 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 17 treesize of output 13 [2021-06-05 04:38:05,787 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:38:05,830 INFO L628 ElimStorePlain]: treesize reduction 65, result has 38.1 percent of original size [2021-06-05 04:38:05,832 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:38:05,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-06-05 04:38:05,833 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:38:05,849 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:38:05,850 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 04:38:05,850 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:133, output treesize:22 [2021-06-05 04:38:05,891 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 04:38:05,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [171952270] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:38:05,891 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:38:05,891 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:38:05,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697903395] [2021-06-05 04:38:05,891 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:38:05,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:38:05,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:38:05,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:38:05,892 INFO L87 Difference]: Start difference. First operand 127 states and 271 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:38:06,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:38:06,149 INFO L93 Difference]: Finished difference Result 150 states and 317 transitions. [2021-06-05 04:38:06,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:38:06,149 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 04:38:06,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:38:06,149 INFO L225 Difference]: With dead ends: 150 [2021-06-05 04:38:06,149 INFO L226 Difference]: Without dead ends: 150 [2021-06-05 04:38:06,150 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 244.6ms TimeCoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:38:06,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-06-05 04:38:06,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 125. [2021-06-05 04:38:06,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 2.153225806451613) internal successors, (267), 124 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:38:06,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 267 transitions. [2021-06-05 04:38:06,152 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 267 transitions. Word has length 19 [2021-06-05 04:38:06,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:38:06,152 INFO L482 AbstractCegarLoop]: Abstraction has 125 states and 267 transitions. [2021-06-05 04:38:06,152 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 04:38:06,153 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 267 transitions. [2021-06-05 04:38:06,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:38:06,153 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:38:06,153 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:38:06,356 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2707,507 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:38:06,357 INFO L430 AbstractCegarLoop]: === Iteration 513 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:38:06,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:38:06,357 INFO L82 PathProgramCache]: Analyzing trace with hash 1426888816, now seen corresponding path program 507 times [2021-06-05 04:38:06,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:38:06,357 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223297088] [2021-06-05 04:38:06,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:38:06,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:38:06,440 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:38:06,440 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:38:06,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223297088] [2021-06-05 04:38:06,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223297088] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:38:06,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512503165] [2021-06-05 04:38:06,440 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 508 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 508 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:38:06,465 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:38:06,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:38:06,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:38:06,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:38:06,575 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:38:06,576 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:38:06,576 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 04:38:06,577 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:38:06,579 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:38:06,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:38:06,580 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:38:06,618 INFO L628 ElimStorePlain]: treesize reduction 68, result has 36.4 percent of original size [2021-06-05 04:38:06,620 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 04:38:06,621 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:38:06,633 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:38:06,633 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 04:38:06,633 INFO L518 ElimStorePlain]: Eliminatee v_prenex_403 vanished before elimination [2021-06-05 04:38:06,634 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 04:38:06,634 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-06-05 04:38:06,660 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:38:06,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1512503165] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:38:06,660 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:38:06,660 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 04:38:06,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121735041] [2021-06-05 04:38:06,660 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:38:06,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:38:06,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:38:06,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:38:06,661 INFO L87 Difference]: Start difference. First operand 125 states and 267 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:38:07,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:38:07,029 INFO L93 Difference]: Finished difference Result 168 states and 346 transitions. [2021-06-05 04:38:07,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:38:07,029 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 04:38:07,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:38:07,030 INFO L225 Difference]: With dead ends: 168 [2021-06-05 04:38:07,030 INFO L226 Difference]: Without dead ends: 168 [2021-06-05 04:38:07,030 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 349.6ms TimeCoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:38:07,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-06-05 04:38:07,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 125. [2021-06-05 04:38:07,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 2.153225806451613) internal successors, (267), 124 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:38:07,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 267 transitions. [2021-06-05 04:38:07,031 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 267 transitions. Word has length 19 [2021-06-05 04:38:07,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:38:07,031 INFO L482 AbstractCegarLoop]: Abstraction has 125 states and 267 transitions. [2021-06-05 04:38:07,031 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 04:38:07,031 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 267 transitions. [2021-06-05 04:38:07,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:38:07,031 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:38:07,032 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:38:07,232 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2711,508 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:38:07,232 INFO L430 AbstractCegarLoop]: === Iteration 514 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:38:07,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:38:07,232 INFO L82 PathProgramCache]: Analyzing trace with hash -1507961740, now seen corresponding path program 508 times [2021-06-05 04:38:07,232 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:38:07,232 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677452621] [2021-06-05 04:38:07,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:38:07,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:38:07,333 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:38:07,333 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:38:07,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677452621] [2021-06-05 04:38:07,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677452621] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:38:07,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769146829] [2021-06-05 04:38:07,333 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 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 04:38:07,357 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:38:07,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:38:07,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:38:07,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:38:07,497 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 04:38:07,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [769146829] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:38:07,497 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:38:07,497 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 04:38:07,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612318681] [2021-06-05 04:38:07,498 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:38:07,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:38:07,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:38:07,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:38:07,498 INFO L87 Difference]: Start difference. First operand 125 states and 267 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:38:07,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:38:07,875 INFO L93 Difference]: Finished difference Result 210 states and 427 transitions. [2021-06-05 04:38:07,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 04:38:07,875 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 04:38:07,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:38:07,876 INFO L225 Difference]: With dead ends: 210 [2021-06-05 04:38:07,876 INFO L226 Difference]: Without dead ends: 210 [2021-06-05 04:38:07,876 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 400.7ms TimeCoverageRelationStatistics Valid=111, Invalid=701, Unknown=0, NotChecked=0, Total=812 [2021-06-05 04:38:07,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2021-06-05 04:38:07,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 126. [2021-06-05 04:38:07,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 2.176) internal successors, (272), 125 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:38:07,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 272 transitions. [2021-06-05 04:38:07,877 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 272 transitions. Word has length 19 [2021-06-05 04:38:07,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:38:07,877 INFO L482 AbstractCegarLoop]: Abstraction has 126 states and 272 transitions. [2021-06-05 04:38:07,877 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 04:38:07,877 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 272 transitions. [2021-06-05 04:38:07,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:38:07,877 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:38:07,877 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:38:08,078 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2718,509 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:38:08,078 INFO L430 AbstractCegarLoop]: === Iteration 515 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:38:08,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:38:08,078 INFO L82 PathProgramCache]: Analyzing trace with hash -96115408, now seen corresponding path program 509 times [2021-06-05 04:38:08,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:38:08,079 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389858373] [2021-06-05 04:38:08,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:38:08,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:38:08,175 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:38:08,175 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:38:08,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389858373] [2021-06-05 04:38:08,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389858373] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:38:08,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393771896] [2021-06-05 04:38:08,176 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 510 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 510 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:38:08,201 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:38:08,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:38:08,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:38:08,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:38:08,327 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 04:38:08,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [393771896] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:38:08,327 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:38:08,327 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 04:38:08,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779043818] [2021-06-05 04:38:08,327 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:38:08,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:38:08,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:38:08,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:38:08,328 INFO L87 Difference]: Start difference. First operand 126 states and 272 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:38:08,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:38:08,657 INFO L93 Difference]: Finished difference Result 134 states and 284 transitions. [2021-06-05 04:38:08,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:38:08,657 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 04:38:08,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:38:08,657 INFO L225 Difference]: With dead ends: 134 [2021-06-05 04:38:08,657 INFO L226 Difference]: Without dead ends: 130 [2021-06-05 04:38:08,658 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 347.1ms TimeCoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:38:08,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-06-05 04:38:08,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 126. [2021-06-05 04:38:08,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 2.168) internal successors, (271), 125 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:38:08,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 271 transitions. [2021-06-05 04:38:08,659 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 271 transitions. Word has length 19 [2021-06-05 04:38:08,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:38:08,659 INFO L482 AbstractCegarLoop]: Abstraction has 126 states and 271 transitions. [2021-06-05 04:38:08,659 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 04:38:08,659 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 271 transitions. [2021-06-05 04:38:08,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:38:08,659 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:38:08,659 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:38:08,859 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2728,510 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:38:08,860 INFO L430 AbstractCegarLoop]: === Iteration 516 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:38:08,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:38:08,860 INFO L82 PathProgramCache]: Analyzing trace with hash -9234174, now seen corresponding path program 510 times [2021-06-05 04:38:08,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:38:08,860 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612864242] [2021-06-05 04:38:08,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:38:08,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:38:08,941 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 04:38:08,942 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:38:08,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612864242] [2021-06-05 04:38:08,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612864242] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:38:08,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776560310] [2021-06-05 04:38:08,942 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 511 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 511 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:38:08,967 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:38:08,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:38:08,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 04:38:08,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:38:09,080 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:38:09,081 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:38:09,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:38:09,082 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:38:09,083 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:38:09,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:38:09,084 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:38:09,102 INFO L628 ElimStorePlain]: treesize reduction 28, result has 42.9 percent of original size [2021-06-05 04:38:09,104 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:38:09,104 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 9 treesize of output 5 [2021-06-05 04:38:09,105 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:38:09,110 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:38:09,111 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 04:38:09,111 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:63, output treesize:9 [2021-06-05 04:38:09,129 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:38:09,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1776560310] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:38:09,129 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:38:09,130 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:38:09,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667686912] [2021-06-05 04:38:09,130 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:38:09,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:38:09,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:38:09,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:38:09,130 INFO L87 Difference]: Start difference. First operand 126 states and 271 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:38:09,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:38:09,379 INFO L93 Difference]: Finished difference Result 155 states and 326 transitions. [2021-06-05 04:38:09,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:38:09,379 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 04:38:09,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:38:09,380 INFO L225 Difference]: With dead ends: 155 [2021-06-05 04:38:09,380 INFO L226 Difference]: Without dead ends: 155 [2021-06-05 04:38:09,380 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 262.8ms TimeCoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:38:09,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-06-05 04:38:09,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 122. [2021-06-05 04:38:09,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 2.1487603305785123) internal successors, (260), 121 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:38:09,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 260 transitions. [2021-06-05 04:38:09,381 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 260 transitions. Word has length 19 [2021-06-05 04:38:09,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:38:09,381 INFO L482 AbstractCegarLoop]: Abstraction has 122 states and 260 transitions. [2021-06-05 04:38:09,381 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 04:38:09,381 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 260 transitions. [2021-06-05 04:38:09,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:38:09,381 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:38:09,381 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:38:09,581 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2734,511 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:38:09,582 INFO L430 AbstractCegarLoop]: === Iteration 517 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:38:09,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:38:09,582 INFO L82 PathProgramCache]: Analyzing trace with hash -108978434, now seen corresponding path program 511 times [2021-06-05 04:38:09,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:38:09,582 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908483373] [2021-06-05 04:38:09,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:38:09,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:38:09,669 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:38:09,670 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:38:09,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908483373] [2021-06-05 04:38:09,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908483373] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:38:09,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134161281] [2021-06-05 04:38:09,670 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 512 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 512 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:38:09,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:38:09,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:38:09,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:38:09,831 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:38:09,831 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:38:09,831 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 04:38:09,832 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:38:09,834 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:38:09,834 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 04:38:09,835 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:38:09,874 INFO L628 ElimStorePlain]: treesize reduction 68, result has 36.4 percent of original size [2021-06-05 04:38:09,874 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 04:38:09,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:38:09,876 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:38:09,888 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:38:09,889 INFO L518 ElimStorePlain]: Eliminatee v_prenex_408 vanished before elimination [2021-06-05 04:38:09,889 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 04:38:09,889 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-06-05 04:38:09,930 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 04:38:09,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2134161281] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:38:09,930 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:38:09,930 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:38:09,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485732030] [2021-06-05 04:38:09,930 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:38:09,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:38:09,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:38:09,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:38:09,930 INFO L87 Difference]: Start difference. First operand 122 states and 260 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:38:10,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:38:10,343 INFO L93 Difference]: Finished difference Result 152 states and 312 transitions. [2021-06-05 04:38:10,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:38:10,343 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 04:38:10,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:38:10,343 INFO L225 Difference]: With dead ends: 152 [2021-06-05 04:38:10,343 INFO L226 Difference]: Without dead ends: 152 [2021-06-05 04:38:10,343 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 402.6ms TimeCoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:38:10,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-06-05 04:38:10,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 125. [2021-06-05 04:38:10,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 2.161290322580645) internal successors, (268), 124 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:38:10,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 268 transitions. [2021-06-05 04:38:10,345 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 268 transitions. Word has length 19 [2021-06-05 04:38:10,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:38:10,345 INFO L482 AbstractCegarLoop]: Abstraction has 125 states and 268 transitions. [2021-06-05 04:38:10,345 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 04:38:10,345 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 268 transitions. [2021-06-05 04:38:10,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:38:10,345 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:38:10,345 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:38:10,545 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 512 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2736 [2021-06-05 04:38:10,545 INFO L430 AbstractCegarLoop]: === Iteration 518 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:38:10,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:38:10,546 INFO L82 PathProgramCache]: Analyzing trace with hash 1251138306, now seen corresponding path program 512 times [2021-06-05 04:38:10,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:38:10,546 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797708654] [2021-06-05 04:38:10,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:38:10,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:38:10,620 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 04:38:10,621 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:38:10,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797708654] [2021-06-05 04:38:10,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797708654] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:38:10,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2002599576] [2021-06-05 04:38:10,621 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 513 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 513 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:38:10,645 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:38:10,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:38:10,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 04:38:10,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:38:10,762 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:38:10,763 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:38:10,763 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 18 treesize of output 14 [2021-06-05 04:38:10,764 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:38:10,766 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:38:10,766 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 18 treesize of output 14 [2021-06-05 04:38:10,767 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:38:10,811 INFO L628 ElimStorePlain]: treesize reduction 72, result has 39.5 percent of original size [2021-06-05 04:38:10,811 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 04:38:10,813 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:38:10,813 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 17 treesize of output 13 [2021-06-05 04:38:10,814 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:38:10,829 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:38:10,831 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:38:10,831 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 9 treesize of output 5 [2021-06-05 04:38:10,832 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:38:10,847 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:38:10,848 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 04:38:10,848 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:133, output treesize:22 [2021-06-05 04:38:10,889 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:38:10,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2002599576] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:38:10,889 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:38:10,889 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:38:10,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648879932] [2021-06-05 04:38:10,889 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:38:10,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:38:10,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:38:10,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:38:10,889 INFO L87 Difference]: Start difference. First operand 125 states and 268 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:38:11,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:38:11,273 INFO L93 Difference]: Finished difference Result 199 states and 404 transitions. [2021-06-05 04:38:11,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:38:11,274 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 04:38:11,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:38:11,274 INFO L225 Difference]: With dead ends: 199 [2021-06-05 04:38:11,274 INFO L226 Difference]: Without dead ends: 199 [2021-06-05 04:38:11,274 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 361.2ms TimeCoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:38:11,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-06-05 04:38:11,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 127. [2021-06-05 04:38:11,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 126 states have (on average 2.1904761904761907) internal successors, (276), 126 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:38:11,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 276 transitions. [2021-06-05 04:38:11,275 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 276 transitions. Word has length 19 [2021-06-05 04:38:11,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:38:11,275 INFO L482 AbstractCegarLoop]: Abstraction has 127 states and 276 transitions. [2021-06-05 04:38:11,275 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 04:38:11,275 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 276 transitions. [2021-06-05 04:38:11,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:38:11,276 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:38:11,276 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:38:11,476 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 513 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2743 [2021-06-05 04:38:11,476 INFO L430 AbstractCegarLoop]: === Iteration 519 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:38:11,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:38:11,476 INFO L82 PathProgramCache]: Analyzing trace with hash -981913688, now seen corresponding path program 513 times [2021-06-05 04:38:11,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:38:11,476 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168999471] [2021-06-05 04:38:11,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:38:11,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:38:11,565 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 04:38:11,565 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:38:11,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168999471] [2021-06-05 04:38:11,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168999471] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:38:11,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957090984] [2021-06-05 04:38:11,565 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 514 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 514 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:38:11,590 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:38:11,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:38:11,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:38:11,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:38:11,742 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 04:38:11,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1957090984] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:38:11,743 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:38:11,743 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 04:38:11,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840444262] [2021-06-05 04:38:11,743 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:38:11,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:38:11,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:38:11,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:38:11,743 INFO L87 Difference]: Start difference. First operand 127 states and 276 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:38:12,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:38:12,111 INFO L93 Difference]: Finished difference Result 135 states and 286 transitions. [2021-06-05 04:38:12,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:38:12,112 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 04:38:12,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:38:12,112 INFO L225 Difference]: With dead ends: 135 [2021-06-05 04:38:12,112 INFO L226 Difference]: Without dead ends: 131 [2021-06-05 04:38:12,112 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 380.1ms TimeCoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:38:12,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-06-05 04:38:12,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 127. [2021-06-05 04:38:12,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 126 states have (on average 2.1825396825396823) internal successors, (275), 126 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:38:12,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 275 transitions. [2021-06-05 04:38:12,113 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 275 transitions. Word has length 19 [2021-06-05 04:38:12,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:38:12,113 INFO L482 AbstractCegarLoop]: Abstraction has 127 states and 275 transitions. [2021-06-05 04:38:12,113 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:38:12,113 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 275 transitions. [2021-06-05 04:38:12,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:38:12,113 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:38:12,113 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:38:12,314 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2747,514 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:38:12,314 INFO L430 AbstractCegarLoop]: === Iteration 520 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:38:12,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:38:12,314 INFO L82 PathProgramCache]: Analyzing trace with hash -895032454, now seen corresponding path program 514 times [2021-06-05 04:38:12,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:38:12,314 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479594938] [2021-06-05 04:38:12,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:38:12,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:38:12,388 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:38:12,388 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:38:12,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479594938] [2021-06-05 04:38:12,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479594938] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:38:12,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557698766] [2021-06-05 04:38:12,389 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 515 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 515 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:38:12,413 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:38:12,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:38:12,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 04:38:12,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:38:12,539 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:38:12,540 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:38:12,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:38:12,541 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:38:12,543 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:38:12,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:38:12,543 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:38:12,561 INFO L628 ElimStorePlain]: treesize reduction 28, result has 42.9 percent of original size [2021-06-05 04:38:12,563 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:38:12,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-06-05 04:38:12,564 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:38:12,569 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:38:12,570 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 04:38:12,570 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:63, output treesize:9 [2021-06-05 04:38:12,589 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:38:12,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1557698766] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:38:12,589 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:38:12,589 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:38:12,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270977870] [2021-06-05 04:38:12,589 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:38:12,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:38:12,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:38:12,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:38:12,589 INFO L87 Difference]: Start difference. First operand 127 states and 275 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:38:12,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:38:12,900 INFO L93 Difference]: Finished difference Result 162 states and 341 transitions. [2021-06-05 04:38:12,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:38:12,900 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:38:12,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:38:12,900 INFO L225 Difference]: With dead ends: 162 [2021-06-05 04:38:12,900 INFO L226 Difference]: Without dead ends: 162 [2021-06-05 04:38:12,900 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 358.7ms TimeCoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:38:12,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-06-05 04:38:12,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 126. [2021-06-05 04:38:12,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 2.184) internal successors, (273), 125 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:38:12,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 273 transitions. [2021-06-05 04:38:12,902 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 273 transitions. Word has length 19 [2021-06-05 04:38:12,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:38:12,902 INFO L482 AbstractCegarLoop]: Abstraction has 126 states and 273 transitions. [2021-06-05 04:38:12,902 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:38:12,902 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 273 transitions. [2021-06-05 04:38:12,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:38:12,902 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:38:12,902 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:38:13,102 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 515 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2752 [2021-06-05 04:38:13,103 INFO L430 AbstractCegarLoop]: === Iteration 521 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:38:13,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:38:13,103 INFO L82 PathProgramCache]: Analyzing trace with hash -1488259954, now seen corresponding path program 515 times [2021-06-05 04:38:13,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:38:13,103 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411381696] [2021-06-05 04:38:13,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:38:13,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:38:13,178 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 04:38:13,178 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:38:13,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411381696] [2021-06-05 04:38:13,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411381696] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:38:13,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932007058] [2021-06-05 04:38:13,178 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 516 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 516 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:38:13,203 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:38:13,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:38:13,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:38:13,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:38:13,341 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 04:38:13,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1932007058] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:38:13,341 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:38:13,341 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 04:38:13,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433643796] [2021-06-05 04:38:13,341 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:38:13,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:38:13,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:38:13,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:38:13,341 INFO L87 Difference]: Start difference. First operand 126 states and 273 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:38:13,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:38:13,622 INFO L93 Difference]: Finished difference Result 132 states and 280 transitions. [2021-06-05 04:38:13,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:38:13,622 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 04:38:13,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:38:13,622 INFO L225 Difference]: With dead ends: 132 [2021-06-05 04:38:13,622 INFO L226 Difference]: Without dead ends: 126 [2021-06-05 04:38:13,622 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 297.3ms TimeCoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:38:13,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-06-05 04:38:13,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2021-06-05 04:38:13,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 2.176) internal successors, (272), 125 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:38:13,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 272 transitions. [2021-06-05 04:38:13,624 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 272 transitions. Word has length 19 [2021-06-05 04:38:13,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:38:13,624 INFO L482 AbstractCegarLoop]: Abstraction has 126 states and 272 transitions. [2021-06-05 04:38:13,624 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 04:38:13,624 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 272 transitions. [2021-06-05 04:38:13,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:38:13,624 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:38:13,624 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:38:13,824 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2754,516 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:38:13,824 INFO L430 AbstractCegarLoop]: === Iteration 522 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:38:13,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:38:13,825 INFO L82 PathProgramCache]: Analyzing trace with hash 1293150722, now seen corresponding path program 516 times [2021-06-05 04:38:13,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:38:13,825 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535449600] [2021-06-05 04:38:13,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:38:13,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:38:13,913 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:38:13,913 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:38:13,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535449600] [2021-06-05 04:38:13,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535449600] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:38:13,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123941190] [2021-06-05 04:38:13,914 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 517 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 517 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:38:13,949 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:38:13,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:38:13,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 04:38:13,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:38:14,100 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:38:14,101 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:38:14,101 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 17 treesize of output 13 [2021-06-05 04:38:14,102 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:38:14,104 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:38:14,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:38:14,106 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:38:14,128 INFO L628 ElimStorePlain]: treesize reduction 28, result has 42.9 percent of original size [2021-06-05 04:38:14,130 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:38:14,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-06-05 04:38:14,131 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:38:14,138 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:38:14,139 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 04:38:14,139 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:63, output treesize:9 [2021-06-05 04:38:14,162 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:38:14,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [123941190] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:38:14,162 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:38:14,162 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:38:14,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480317450] [2021-06-05 04:38:14,163 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:38:14,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:38:14,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:38:14,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:38:14,163 INFO L87 Difference]: Start difference. First operand 126 states and 272 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:38:14,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:38:14,322 INFO L93 Difference]: Finished difference Result 153 states and 322 transitions. [2021-06-05 04:38:14,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:38:14,323 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 04:38:14,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:38:14,323 INFO L225 Difference]: With dead ends: 153 [2021-06-05 04:38:14,323 INFO L226 Difference]: Without dead ends: 153 [2021-06-05 04:38:14,323 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 225.1ms TimeCoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:38:14,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-06-05 04:38:14,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 121. [2021-06-05 04:38:14,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 2.15) internal successors, (258), 120 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:38:14,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 258 transitions. [2021-06-05 04:38:14,324 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 258 transitions. Word has length 19 [2021-06-05 04:38:14,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:38:14,324 INFO L482 AbstractCegarLoop]: Abstraction has 121 states and 258 transitions. [2021-06-05 04:38:14,324 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 04:38:14,324 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 258 transitions. [2021-06-05 04:38:14,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:38:14,324 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:38:14,325 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:38:14,525 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 517 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2760 [2021-06-05 04:38:14,525 INFO L430 AbstractCegarLoop]: === Iteration 523 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:38:14,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:38:14,525 INFO L82 PathProgramCache]: Analyzing trace with hash -1574989870, now seen corresponding path program 517 times [2021-06-05 04:38:14,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:38:14,525 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998225176] [2021-06-05 04:38:14,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:38:14,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:38:14,603 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 04:38:14,603 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:38:14,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998225176] [2021-06-05 04:38:14,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998225176] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:38:14,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263476894] [2021-06-05 04:38:14,603 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 518 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 518 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:38:14,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:38:14,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:38:14,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:38:14,807 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 04:38:14,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1263476894] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:38:14,807 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:38:14,807 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 04:38:14,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750917130] [2021-06-05 04:38:14,807 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:38:14,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:38:14,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:38:14,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:38:14,808 INFO L87 Difference]: Start difference. First operand 121 states and 258 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:38:15,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:38:15,284 INFO L93 Difference]: Finished difference Result 170 states and 347 transitions. [2021-06-05 04:38:15,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:38:15,285 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 04:38:15,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:38:15,285 INFO L225 Difference]: With dead ends: 170 [2021-06-05 04:38:15,285 INFO L226 Difference]: Without dead ends: 167 [2021-06-05 04:38:15,285 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 451.9ms TimeCoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:38:15,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-06-05 04:38:15,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 132. [2021-06-05 04:38:15,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 2.198473282442748) internal successors, (288), 131 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:38:15,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 288 transitions. [2021-06-05 04:38:15,286 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 288 transitions. Word has length 19 [2021-06-05 04:38:15,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:38:15,286 INFO L482 AbstractCegarLoop]: Abstraction has 132 states and 288 transitions. [2021-06-05 04:38:15,286 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 04:38:15,286 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 288 transitions. [2021-06-05 04:38:15,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:38:15,287 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:38:15,287 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:38:15,487 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 518 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2762 [2021-06-05 04:38:15,487 INFO L430 AbstractCegarLoop]: === Iteration 524 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:38:15,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:38:15,487 INFO L82 PathProgramCache]: Analyzing trace with hash -1798921338, now seen corresponding path program 518 times [2021-06-05 04:38:15,487 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:38:15,487 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581591129] [2021-06-05 04:38:15,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:38:15,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:38:15,597 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:38:15,597 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:38:15,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581591129] [2021-06-05 04:38:15,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581591129] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:38:15,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048205651] [2021-06-05 04:38:15,597 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 519 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 519 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:38:15,622 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:38:15,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:38:15,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 04:38:15,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:38:15,786 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:38:15,786 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:38:15,786 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 18 treesize of output 14 [2021-06-05 04:38:15,787 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:38:15,789 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:38:15,790 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 17 treesize of output 13 [2021-06-05 04:38:15,790 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:38:15,836 INFO L628 ElimStorePlain]: treesize reduction 78, result has 40.5 percent of original size [2021-06-05 04:38:15,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index 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 04:38:15,839 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:38:15,855 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:38:15,857 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:38:15,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 04:38:15,858 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:38:15,873 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:38:15,873 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 04:38:15,874 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:38:15,874 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:141, output treesize:22 [2021-06-05 04:38:15,921 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 04:38:15,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1048205651] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:38:15,921 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:38:15,921 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:38:15,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081329644] [2021-06-05 04:38:15,921 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:38:15,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:38:15,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:38:15,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:38:15,922 INFO L87 Difference]: Start difference. First operand 132 states and 288 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:38:16,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:38:16,128 INFO L93 Difference]: Finished difference Result 162 states and 337 transitions. [2021-06-05 04:38:16,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:38:16,128 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 04:38:16,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:38:16,128 INFO L225 Difference]: With dead ends: 162 [2021-06-05 04:38:16,128 INFO L226 Difference]: Without dead ends: 162 [2021-06-05 04:38:16,128 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 280.3ms TimeCoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:38:16,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-06-05 04:38:16,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 132. [2021-06-05 04:38:16,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 2.198473282442748) internal successors, (288), 131 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:38:16,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 288 transitions. [2021-06-05 04:38:16,130 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 288 transitions. Word has length 19 [2021-06-05 04:38:16,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:38:16,130 INFO L482 AbstractCegarLoop]: Abstraction has 132 states and 288 transitions. [2021-06-05 04:38:16,130 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 04:38:16,130 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 288 transitions. [2021-06-05 04:38:16,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:38:16,130 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:38:16,130 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:38:16,330 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 519 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2773 [2021-06-05 04:38:16,330 INFO L430 AbstractCegarLoop]: === Iteration 525 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:38:16,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:38:16,331 INFO L82 PathProgramCache]: Analyzing trace with hash 1085255126, now seen corresponding path program 519 times [2021-06-05 04:38:16,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:38:16,331 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251867778] [2021-06-05 04:38:16,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:38:16,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:38:16,451 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:38:16,451 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:38:16,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251867778] [2021-06-05 04:38:16,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251867778] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:38:16,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393998790] [2021-06-05 04:38:16,451 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 520 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 520 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:38:16,476 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:38:16,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:38:16,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:38:16,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:38:16,639 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:38:16,640 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:38:16,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:38:16,641 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:38:16,643 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:38:16,643 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 16 treesize of output 12 [2021-06-05 04:38:16,644 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:38:16,682 INFO L628 ElimStorePlain]: treesize reduction 68, result has 36.4 percent of original size [2021-06-05 04:38:16,682 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 04:38:16,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:38:16,685 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:38:16,697 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:38:16,697 INFO L518 ElimStorePlain]: Eliminatee v_prenex_420 vanished before elimination [2021-06-05 04:38:16,698 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 04:38:16,698 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-06-05 04:38:16,734 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 04:38:16,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1393998790] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:38:16,734 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:38:16,734 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 04:38:16,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711324492] [2021-06-05 04:38:16,735 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:38:16,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:38:16,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:38:16,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=237, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:38:16,735 INFO L87 Difference]: Start difference. First operand 132 states and 288 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:38:17,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:38:17,324 INFO L93 Difference]: Finished difference Result 164 states and 338 transitions. [2021-06-05 04:38:17,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:38:17,324 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 04:38:17,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:38:17,324 INFO L225 Difference]: With dead ends: 164 [2021-06-05 04:38:17,324 INFO L226 Difference]: Without dead ends: 162 [2021-06-05 04:38:17,324 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 546.6ms TimeCoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:38:17,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-06-05 04:38:17,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 132. [2021-06-05 04:38:17,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 2.1908396946564888) internal successors, (287), 131 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:38:17,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 287 transitions. [2021-06-05 04:38:17,326 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 287 transitions. Word has length 19 [2021-06-05 04:38:17,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:38:17,326 INFO L482 AbstractCegarLoop]: Abstraction has 132 states and 287 transitions. [2021-06-05 04:38:17,326 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 04:38:17,326 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 287 transitions. [2021-06-05 04:38:17,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:38:17,326 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:38:17,326 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:38:17,526 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2779,520 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:38:17,526 INFO L430 AbstractCegarLoop]: === Iteration 526 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:38:17,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:38:17,527 INFO L82 PathProgramCache]: Analyzing trace with hash -438804598, now seen corresponding path program 520 times [2021-06-05 04:38:17,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:38:17,527 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948028445] [2021-06-05 04:38:17,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:38:17,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:38:17,604 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 04:38:17,604 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:38:17,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948028445] [2021-06-05 04:38:17,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948028445] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:38:17,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886483199] [2021-06-05 04:38:17,604 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 521 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 521 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:38:17,628 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:38:17,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:38:17,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:38:17,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:38:17,810 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:38:17,810 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1886483199] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:38:17,810 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:38:17,810 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 04:38:17,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678797526] [2021-06-05 04:38:17,810 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:38:17,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:38:17,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:38:17,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:38:17,811 INFO L87 Difference]: Start difference. First operand 132 states and 287 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:38:18,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:38:18,326 INFO L93 Difference]: Finished difference Result 177 states and 363 transitions. [2021-06-05 04:38:18,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:38:18,326 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 04:38:18,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:38:18,327 INFO L225 Difference]: With dead ends: 177 [2021-06-05 04:38:18,327 INFO L226 Difference]: Without dead ends: 177 [2021-06-05 04:38:18,327 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 456.5ms TimeCoverageRelationStatistics Valid=89, Invalid=561, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:38:18,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-06-05 04:38:18,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 131. [2021-06-05 04:38:18,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 130 states have (on average 2.1923076923076925) internal successors, (285), 130 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:38:18,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 285 transitions. [2021-06-05 04:38:18,328 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 285 transitions. Word has length 19 [2021-06-05 04:38:18,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:38:18,328 INFO L482 AbstractCegarLoop]: Abstraction has 131 states and 285 transitions. [2021-06-05 04:38:18,328 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 04:38:18,328 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 285 transitions. [2021-06-05 04:38:18,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:38:18,328 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:38:18,328 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:38:18,529 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 521 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2787 [2021-06-05 04:38:18,529 INFO L430 AbstractCegarLoop]: === Iteration 527 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:38:18,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:38:18,529 INFO L82 PathProgramCache]: Analyzing trace with hash 1623110704, now seen corresponding path program 521 times [2021-06-05 04:38:18,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:38:18,529 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380128557] [2021-06-05 04:38:18,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:38:18,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:38:18,640 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:38:18,640 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:38:18,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380128557] [2021-06-05 04:38:18,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380128557] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:38:18,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [329078297] [2021-06-05 04:38:18,641 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 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 04:38:18,665 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:38:18,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:38:18,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:38:18,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:38:18,840 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:38:18,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [329078297] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:38:18,840 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:38:18,840 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 04:38:18,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653445031] [2021-06-05 04:38:18,840 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:38:18,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:38:18,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:38:18,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=238, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:38:18,840 INFO L87 Difference]: Start difference. First operand 131 states and 285 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:38:19,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:38:19,304 INFO L93 Difference]: Finished difference Result 142 states and 300 transitions. [2021-06-05 04:38:19,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:38:19,305 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 04:38:19,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:38:19,305 INFO L225 Difference]: With dead ends: 142 [2021-06-05 04:38:19,305 INFO L226 Difference]: Without dead ends: 138 [2021-06-05 04:38:19,305 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 486.5ms TimeCoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:38:19,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-06-05 04:38:19,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 131. [2021-06-05 04:38:19,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 130 states have (on average 2.1846153846153844) internal successors, (284), 130 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:38:19,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 284 transitions. [2021-06-05 04:38:19,306 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 284 transitions. Word has length 19 [2021-06-05 04:38:19,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:38:19,306 INFO L482 AbstractCegarLoop]: Abstraction has 131 states and 284 transitions. [2021-06-05 04:38:19,306 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 04:38:19,306 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 284 transitions. [2021-06-05 04:38:19,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:38:19,307 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:38:19,307 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:38:19,507 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2799,522 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:38:19,507 INFO L430 AbstractCegarLoop]: === Iteration 528 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:38:19,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:38:19,507 INFO L82 PathProgramCache]: Analyzing trace with hash 1709991938, now seen corresponding path program 522 times [2021-06-05 04:38:19,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:38:19,507 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326522943] [2021-06-05 04:38:19,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:38:19,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:38:19,608 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:38:19,608 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:38:19,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326522943] [2021-06-05 04:38:19,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326522943] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:38:19,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045764063] [2021-06-05 04:38:19,608 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 523 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 523 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:38:19,633 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:38:19,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:38:19,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 04:38:19,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:38:19,781 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:38:19,781 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:38:19,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:38:19,782 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:38:19,784 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:38:19,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:38:19,785 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:38:19,802 INFO L628 ElimStorePlain]: treesize reduction 28, result has 42.9 percent of original size [2021-06-05 04:38:19,804 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:38:19,804 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 9 treesize of output 5 [2021-06-05 04:38:19,805 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:38:19,811 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:38:19,811 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 04:38:19,811 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:63, output treesize:9 [2021-06-05 04:38:19,830 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:38:19,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2045764063] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:38:19,830 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:38:19,830 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:38:19,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102424428] [2021-06-05 04:38:19,831 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:38:19,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:38:19,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:38:19,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:38:19,831 INFO L87 Difference]: Start difference. First operand 131 states and 284 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:38:20,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:38:20,321 INFO L93 Difference]: Finished difference Result 173 states and 362 transitions. [2021-06-05 04:38:20,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:38:20,322 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 04:38:20,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:38:20,322 INFO L225 Difference]: With dead ends: 173 [2021-06-05 04:38:20,322 INFO L226 Difference]: Without dead ends: 173 [2021-06-05 04:38:20,322 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 423.1ms TimeCoverageRelationStatistics Valid=86, Invalid=564, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:38:20,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-06-05 04:38:20,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 130. [2021-06-05 04:38:20,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 129 states have (on average 2.186046511627907) internal successors, (282), 129 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:38:20,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 282 transitions. [2021-06-05 04:38:20,323 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 282 transitions. Word has length 19 [2021-06-05 04:38:20,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:38:20,324 INFO L482 AbstractCegarLoop]: Abstraction has 130 states and 282 transitions. [2021-06-05 04:38:20,324 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 04:38:20,324 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 282 transitions. [2021-06-05 04:38:20,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:38:20,324 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:38:20,324 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:38:20,524 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2804,523 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:38:20,524 INFO L430 AbstractCegarLoop]: === Iteration 529 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:38:20,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:38:20,524 INFO L82 PathProgramCache]: Analyzing trace with hash 1116764438, now seen corresponding path program 523 times [2021-06-05 04:38:20,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:38:20,525 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17445401] [2021-06-05 04:38:20,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:38:20,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:38:20,624 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:38:20,624 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:38:20,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17445401] [2021-06-05 04:38:20,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17445401] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:38:20,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521887486] [2021-06-05 04:38:20,624 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 524 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 524 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:38:20,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:38:20,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:38:20,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:38:20,808 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 04:38:20,809 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1521887486] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:38:20,809 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:38:20,809 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 04:38:20,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547957278] [2021-06-05 04:38:20,809 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:38:20,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:38:20,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:38:20,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=238, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:38:20,809 INFO L87 Difference]: Start difference. First operand 130 states and 282 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:38:21,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:38:21,212 INFO L93 Difference]: Finished difference Result 140 states and 295 transitions. [2021-06-05 04:38:21,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:38:21,212 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 04:38:21,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:38:21,213 INFO L225 Difference]: With dead ends: 140 [2021-06-05 04:38:21,213 INFO L226 Difference]: Without dead ends: 134 [2021-06-05 04:38:21,213 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 430.6ms TimeCoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:38:21,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-06-05 04:38:21,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 130. [2021-06-05 04:38:21,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 129 states have (on average 2.1782945736434107) internal successors, (281), 129 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:38:21,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 281 transitions. [2021-06-05 04:38:21,214 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 281 transitions. Word has length 19 [2021-06-05 04:38:21,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:38:21,214 INFO L482 AbstractCegarLoop]: Abstraction has 130 states and 281 transitions. [2021-06-05 04:38:21,214 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 04:38:21,214 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 281 transitions. [2021-06-05 04:38:21,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:38:21,214 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:38:21,214 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:38:21,414 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2806,524 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:38:21,415 INFO L430 AbstractCegarLoop]: === Iteration 530 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:38:21,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:38:21,415 INFO L82 PathProgramCache]: Analyzing trace with hash -396792182, now seen corresponding path program 524 times [2021-06-05 04:38:21,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:38:21,415 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432571115] [2021-06-05 04:38:21,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:38:21,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:38:21,493 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 04:38:21,493 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:38:21,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432571115] [2021-06-05 04:38:21,493 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432571115] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:38:21,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190355715] [2021-06-05 04:38:21,493 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 525 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 525 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:38:21,519 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:38:21,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:38:21,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 04:38:21,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:38:21,653 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:38:21,653 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:38:21,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:38:21,654 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:38:21,656 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:38:21,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:38:21,657 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:38:21,675 INFO L628 ElimStorePlain]: treesize reduction 28, result has 42.9 percent of original size [2021-06-05 04:38:21,676 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:38:21,677 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 9 treesize of output 5 [2021-06-05 04:38:21,678 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:38:21,683 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:38:21,684 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 04:38:21,684 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:63, output treesize:9 [2021-06-05 04:38:21,703 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:38:21,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [190355715] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:38:21,703 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:38:21,703 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:38:21,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723739400] [2021-06-05 04:38:21,703 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:38:21,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:38:21,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:38:21,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:38:21,703 INFO L87 Difference]: Start difference. First operand 130 states and 281 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:38:22,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:38:22,107 INFO L93 Difference]: Finished difference Result 166 states and 349 transitions. [2021-06-05 04:38:22,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:38:22,107 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 04:38:22,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:38:22,107 INFO L225 Difference]: With dead ends: 166 [2021-06-05 04:38:22,107 INFO L226 Difference]: Without dead ends: 166 [2021-06-05 04:38:22,107 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 397.9ms TimeCoverageRelationStatistics Valid=96, Invalid=606, Unknown=0, NotChecked=0, Total=702 [2021-06-05 04:38:22,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-06-05 04:38:22,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 129. [2021-06-05 04:38:22,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 2.1796875) internal successors, (279), 128 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:38:22,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 279 transitions. [2021-06-05 04:38:22,109 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 279 transitions. Word has length 19 [2021-06-05 04:38:22,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:38:22,109 INFO L482 AbstractCegarLoop]: Abstraction has 129 states and 279 transitions. [2021-06-05 04:38:22,109 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 04:38:22,109 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 279 transitions. [2021-06-05 04:38:22,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:38:22,109 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:38:22,109 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:38:22,309 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2811,525 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:38:22,310 INFO L430 AbstractCegarLoop]: === Iteration 531 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:38:22,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:38:22,310 INFO L82 PathProgramCache]: Analyzing trace with hash -1695067920, now seen corresponding path program 525 times [2021-06-05 04:38:22,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:38:22,310 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920709449] [2021-06-05 04:38:22,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:38:22,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:38:22,386 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:38:22,387 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:38:22,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920709449] [2021-06-05 04:38:22,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920709449] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:38:22,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637600234] [2021-06-05 04:38:22,387 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 526 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 526 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:38:22,415 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:38:22,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:38:22,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:38:22,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:38:22,553 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:38:22,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1637600234] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:38:22,553 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:38:22,553 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 04:38:22,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986608799] [2021-06-05 04:38:22,553 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:38:22,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:38:22,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:38:22,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:38:22,554 INFO L87 Difference]: Start difference. First operand 129 states and 279 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:38:22,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:38:22,800 INFO L93 Difference]: Finished difference Result 137 states and 289 transitions. [2021-06-05 04:38:22,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:38:22,800 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 04:38:22,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:38:22,801 INFO L225 Difference]: With dead ends: 137 [2021-06-05 04:38:22,801 INFO L226 Difference]: Without dead ends: 129 [2021-06-05 04:38:22,801 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 261.7ms TimeCoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:38:22,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-06-05 04:38:22,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2021-06-05 04:38:22,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 2.171875) internal successors, (278), 128 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:38:22,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 278 transitions. [2021-06-05 04:38:22,802 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 278 transitions. Word has length 19 [2021-06-05 04:38:22,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:38:22,802 INFO L482 AbstractCegarLoop]: Abstraction has 129 states and 278 transitions. [2021-06-05 04:38:22,802 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 04:38:22,802 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 278 transitions. [2021-06-05 04:38:22,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:38:22,802 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:38:22,802 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:38:23,002 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 526 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2813 [2021-06-05 04:38:23,003 INFO L430 AbstractCegarLoop]: === Iteration 532 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:38:23,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:38:23,003 INFO L82 PathProgramCache]: Analyzing trace with hash -1282590462, now seen corresponding path program 526 times [2021-06-05 04:38:23,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:38:23,003 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787005555] [2021-06-05 04:38:23,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:38:23,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:38:23,075 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:38:23,075 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:38:23,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787005555] [2021-06-05 04:38:23,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787005555] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:38:23,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1140496900] [2021-06-05 04:38:23,075 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 527 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 527 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:38:23,099 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:38:23,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:38:23,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 04:38:23,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:38:23,221 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:38:23,221 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:38:23,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:38:23,222 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:38:23,224 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:38:23,224 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 17 treesize of output 13 [2021-06-05 04:38:23,225 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:38:23,243 INFO L628 ElimStorePlain]: treesize reduction 28, result has 42.9 percent of original size [2021-06-05 04:38:23,245 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:38:23,245 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 9 treesize of output 5 [2021-06-05 04:38:23,246 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:38:23,251 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:38:23,252 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 04:38:23,252 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:63, output treesize:9 [2021-06-05 04:38:23,271 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 04:38:23,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1140496900] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:38:23,271 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:38:23,271 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:38:23,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075564242] [2021-06-05 04:38:23,271 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:38:23,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:38:23,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:38:23,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:38:23,271 INFO L87 Difference]: Start difference. First operand 129 states and 278 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:38:23,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:38:23,410 INFO L93 Difference]: Finished difference Result 143 states and 302 transitions. [2021-06-05 04:38:23,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:38:23,410 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 04:38:23,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:38:23,410 INFO L225 Difference]: With dead ends: 143 [2021-06-05 04:38:23,410 INFO L226 Difference]: Without dead ends: 143 [2021-06-05 04:38:23,410 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 164.8ms TimeCoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:38:23,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-06-05 04:38:23,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 119. [2021-06-05 04:38:23,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 2.152542372881356) internal successors, (254), 118 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:38:23,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 254 transitions. [2021-06-05 04:38:23,411 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 254 transitions. Word has length 19 [2021-06-05 04:38:23,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:38:23,411 INFO L482 AbstractCegarLoop]: Abstraction has 119 states and 254 transitions. [2021-06-05 04:38:23,411 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 04:38:23,411 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 254 transitions. [2021-06-05 04:38:23,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:38:23,412 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:38:23,412 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:38:23,612 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2818,527 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:38:23,612 INFO L430 AbstractCegarLoop]: === Iteration 533 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:38:23,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:38:23,612 INFO L82 PathProgramCache]: Analyzing trace with hash -1207617126, now seen corresponding path program 527 times [2021-06-05 04:38:23,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:38:23,612 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373252157] [2021-06-05 04:38:23,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:38:23,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:38:23,695 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:38:23,696 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:38:23,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373252157] [2021-06-05 04:38:23,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373252157] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:38:23,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172450602] [2021-06-05 04:38:23,696 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 528 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 528 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:38:23,721 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 04:38:23,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:38:23,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:38:23,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:38:23,819 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:38:23,820 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:38:23,820 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 04:38:23,821 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:38:23,823 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:38:23,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:38:23,823 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:38:23,838 INFO L628 ElimStorePlain]: treesize reduction 29, result has 32.6 percent of original size [2021-06-05 04:38:23,838 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 04:38:23,838 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 04:38:23,838 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:57, output treesize:6 [2021-06-05 04:38:23,853 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 04:38:23,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [172450602] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:38:23,853 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:38:23,853 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 04:38:23,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618549506] [2021-06-05 04:38:23,854 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:38:23,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:38:23,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:38:23,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:38:23,854 INFO L87 Difference]: Start difference. First operand 119 states and 254 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:38:24,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:38:24,168 INFO L93 Difference]: Finished difference Result 160 states and 336 transitions. [2021-06-05 04:38:24,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 04:38:24,168 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 04:38:24,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:38:24,169 INFO L225 Difference]: With dead ends: 160 [2021-06-05 04:38:24,169 INFO L226 Difference]: Without dead ends: 160 [2021-06-05 04:38:24,169 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 276.0ms TimeCoverageRelationStatistics Valid=86, Invalid=564, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:38:24,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-06-05 04:38:24,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 119. [2021-06-05 04:38:24,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 2.152542372881356) internal successors, (254), 118 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:38:24,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 254 transitions. [2021-06-05 04:38:24,170 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 254 transitions. Word has length 19 [2021-06-05 04:38:24,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:38:24,170 INFO L482 AbstractCegarLoop]: Abstraction has 119 states and 254 transitions. [2021-06-05 04:38:24,170 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 04:38:24,170 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 254 transitions. [2021-06-05 04:38:24,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:38:24,170 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:38:24,170 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:38:24,370 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 528 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2820 [2021-06-05 04:38:24,371 INFO L430 AbstractCegarLoop]: === Iteration 534 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:38:24,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:38:24,371 INFO L82 PathProgramCache]: Analyzing trace with hash -1567533644, now seen corresponding path program 528 times [2021-06-05 04:38:24,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:38:24,371 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693454704] [2021-06-05 04:38:24,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:38:24,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:38:24,454 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:38:24,454 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:38:24,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693454704] [2021-06-05 04:38:24,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693454704] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:38:24,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007033464] [2021-06-05 04:38:24,454 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 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 04:38:24,479 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:38:24,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:38:24,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:38:24,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:38:24,574 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:38:24,575 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:38:24,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:38:24,576 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:38:24,578 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:38:24,578 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:38:24,578 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 16 treesize of output 12 [2021-06-05 04:38:24,579 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:38:24,581 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:38:24,581 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:38:24,582 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 16 treesize of output 12 [2021-06-05 04:38:24,582 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:38:24,584 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:38:24,584 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 17 treesize of output 13 [2021-06-05 04:38:24,585 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:38:24,617 INFO L628 ElimStorePlain]: treesize reduction 53, result has 36.9 percent of original size [2021-06-05 04:38:24,617 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 04:38:24,618 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 04:38:24,618 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:121, output treesize:15 [2021-06-05 04:38:24,654 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:38:24,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1007033464] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:38:24,654 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:38:24,654 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 04:38:24,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946626480] [2021-06-05 04:38:24,654 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:38:24,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:38:24,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:38:24,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:38:24,654 INFO L87 Difference]: Start difference. First operand 119 states and 254 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:38:25,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:38:25,077 INFO L93 Difference]: Finished difference Result 175 states and 367 transitions. [2021-06-05 04:38:25,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 04:38:25,078 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:38:25,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:38:25,078 INFO L225 Difference]: With dead ends: 175 [2021-06-05 04:38:25,078 INFO L226 Difference]: Without dead ends: 175 [2021-06-05 04:38:25,078 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 336.0ms TimeCoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:38:25,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-06-05 04:38:25,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 119. [2021-06-05 04:38:25,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 2.152542372881356) internal successors, (254), 118 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:38:25,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 254 transitions. [2021-06-05 04:38:25,079 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 254 transitions. Word has length 19 [2021-06-05 04:38:25,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:38:25,079 INFO L482 AbstractCegarLoop]: Abstraction has 119 states and 254 transitions. [2021-06-05 04:38:25,079 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 04:38:25,079 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 254 transitions. [2021-06-05 04:38:25,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:38:25,079 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:38:25,079 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:38:25,280 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2824,529 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:38:25,280 INFO L430 AbstractCegarLoop]: === Iteration 535 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:38:25,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:38:25,280 INFO L82 PathProgramCache]: Analyzing trace with hash -857485874, now seen corresponding path program 529 times [2021-06-05 04:38:25,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:38:25,280 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524724544] [2021-06-05 04:38:25,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:38:25,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:38:25,367 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:38:25,368 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:38:25,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524724544] [2021-06-05 04:38:25,368 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524724544] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:38:25,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261351017] [2021-06-05 04:38:25,368 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 530 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 530 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:38:25,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:38:25,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:38:25,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:38:25,506 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:38:25,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1261351017] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:38:25,506 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:38:25,506 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 04:38:25,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580751506] [2021-06-05 04:38:25,506 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:38:25,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:38:25,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:38:25,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:38:25,506 INFO L87 Difference]: Start difference. First operand 119 states and 254 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:38:25,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:38:25,843 INFO L93 Difference]: Finished difference Result 142 states and 300 transitions. [2021-06-05 04:38:25,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:38:25,843 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:38:25,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:38:25,843 INFO L225 Difference]: With dead ends: 142 [2021-06-05 04:38:25,843 INFO L226 Difference]: Without dead ends: 142 [2021-06-05 04:38:25,844 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 294.8ms TimeCoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:38:25,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-06-05 04:38:25,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 117. [2021-06-05 04:38:25,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 2.1551724137931036) internal successors, (250), 116 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:38:25,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 250 transitions. [2021-06-05 04:38:25,845 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 250 transitions. Word has length 19 [2021-06-05 04:38:25,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:38:25,845 INFO L482 AbstractCegarLoop]: Abstraction has 117 states and 250 transitions. [2021-06-05 04:38:25,845 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 04:38:25,845 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 250 transitions. [2021-06-05 04:38:25,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:38:25,845 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:38:25,845 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:38:26,045 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2834,530 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:38:26,046 INFO L430 AbstractCegarLoop]: === Iteration 536 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:38:26,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:38:26,046 INFO L82 PathProgramCache]: Analyzing trace with hash 620649532, now seen corresponding path program 530 times [2021-06-05 04:38:26,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:38:26,046 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546917507] [2021-06-05 04:38:26,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:38:26,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:38:26,132 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 04:38:26,132 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:38:26,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546917507] [2021-06-05 04:38:26,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546917507] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:38:26,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1233882766] [2021-06-05 04:38:26,132 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 531 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 531 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:38:26,157 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:38:26,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:38:26,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:38:26,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:38:26,258 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:38:26,258 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:38:26,258 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 17 treesize of output 13 [2021-06-05 04:38:26,259 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:38:26,262 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:38:26,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:38:26,262 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:38:26,299 INFO L628 ElimStorePlain]: treesize reduction 60, result has 38.8 percent of original size [2021-06-05 04:38:26,301 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 04:38:26,302 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:38:26,314 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:38:26,314 INFO L518 ElimStorePlain]: Eliminatee v_prenex_427 vanished before elimination [2021-06-05 04:38:26,314 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 04:38:26,315 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 04:38:26,315 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-06-05 04:38:26,341 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 04:38:26,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1233882766] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:38:26,341 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:38:26,341 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 04:38:26,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368959299] [2021-06-05 04:38:26,342 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:38:26,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:38:26,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:38:26,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:38:26,342 INFO L87 Difference]: Start difference. First operand 117 states and 250 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:38:26,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:38:26,750 INFO L93 Difference]: Finished difference Result 161 states and 331 transitions. [2021-06-05 04:38:26,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 04:38:26,750 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:38:26,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:38:26,750 INFO L225 Difference]: With dead ends: 161 [2021-06-05 04:38:26,750 INFO L226 Difference]: Without dead ends: 161 [2021-06-05 04:38:26,750 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 371.3ms TimeCoverageRelationStatistics Valid=90, Invalid=560, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:38:26,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-06-05 04:38:26,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 117. [2021-06-05 04:38:26,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 2.1551724137931036) internal successors, (250), 116 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:38:26,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 250 transitions. [2021-06-05 04:38:26,752 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 250 transitions. Word has length 19 [2021-06-05 04:38:26,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:38:26,752 INFO L482 AbstractCegarLoop]: Abstraction has 117 states and 250 transitions. [2021-06-05 04:38:26,752 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 04:38:26,752 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 250 transitions. [2021-06-05 04:38:26,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:38:26,752 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:38:26,752 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:38:26,952 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 531 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2844 [2021-06-05 04:38:26,952 INFO L430 AbstractCegarLoop]: === Iteration 537 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:38:26,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:38:26,956 INFO L82 PathProgramCache]: Analyzing trace with hash 1330697302, now seen corresponding path program 531 times [2021-06-05 04:38:26,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:38:26,956 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051671419] [2021-06-05 04:38:26,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:38:26,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:38:27,036 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:38:27,036 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:38:27,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051671419] [2021-06-05 04:38:27,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051671419] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:38:27,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176143270] [2021-06-05 04:38:27,036 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 532 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 532 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:38:27,061 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:38:27,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:38:27,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:38:27,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:38:27,202 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:38:27,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1176143270] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:38:27,203 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:38:27,203 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 04:38:27,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622122477] [2021-06-05 04:38:27,203 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:38:27,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:38:27,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:38:27,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:38:27,203 INFO L87 Difference]: Start difference. First operand 117 states and 250 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:38:27,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:38:27,635 INFO L93 Difference]: Finished difference Result 204 states and 413 transitions. [2021-06-05 04:38:27,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 04:38:27,635 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:38:27,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:38:27,636 INFO L225 Difference]: With dead ends: 204 [2021-06-05 04:38:27,636 INFO L226 Difference]: Without dead ends: 204 [2021-06-05 04:38:27,636 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 392.9ms TimeCoverageRelationStatistics Valid=116, Invalid=696, Unknown=0, NotChecked=0, Total=812 [2021-06-05 04:38:27,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-06-05 04:38:27,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 118. [2021-06-05 04:38:27,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 2.1794871794871793) internal successors, (255), 117 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:38:27,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 255 transitions. [2021-06-05 04:38:27,638 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 255 transitions. Word has length 19 [2021-06-05 04:38:27,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:38:27,638 INFO L482 AbstractCegarLoop]: Abstraction has 118 states and 255 transitions. [2021-06-05 04:38:27,638 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 04:38:27,638 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 255 transitions. [2021-06-05 04:38:27,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:38:27,638 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:38:27,638 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:38:27,840 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 532 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2851 [2021-06-05 04:38:27,841 INFO L430 AbstractCegarLoop]: === Iteration 538 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:38:27,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:38:27,841 INFO L82 PathProgramCache]: Analyzing trace with hash -902354692, now seen corresponding path program 532 times [2021-06-05 04:38:27,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:38:27,841 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455337373] [2021-06-05 04:38:27,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:38:27,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:38:27,935 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:38:27,935 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:38:27,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455337373] [2021-06-05 04:38:27,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455337373] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:38:27,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288462985] [2021-06-05 04:38:27,936 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 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 04:38:27,960 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:38:27,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:38:27,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:38:27,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:38:28,075 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:38:28,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1288462985] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:38:28,075 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:38:28,075 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 04:38:28,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555939368] [2021-06-05 04:38:28,076 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:38:28,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:38:28,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:38:28,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:38:28,076 INFO L87 Difference]: Start difference. First operand 118 states and 255 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:38:28,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:38:28,444 INFO L93 Difference]: Finished difference Result 127 states and 269 transitions. [2021-06-05 04:38:28,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:38:28,444 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:38:28,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:38:28,445 INFO L225 Difference]: With dead ends: 127 [2021-06-05 04:38:28,445 INFO L226 Difference]: Without dead ends: 123 [2021-06-05 04:38:28,445 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 358.2ms TimeCoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:38:28,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-06-05 04:38:28,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 118. [2021-06-05 04:38:28,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 2.1709401709401708) internal successors, (254), 117 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:38:28,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 254 transitions. [2021-06-05 04:38:28,446 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 254 transitions. Word has length 19 [2021-06-05 04:38:28,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:38:28,446 INFO L482 AbstractCegarLoop]: Abstraction has 118 states and 254 transitions. [2021-06-05 04:38:28,446 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 04:38:28,446 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 254 transitions. [2021-06-05 04:38:28,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:38:28,446 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:38:28,446 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:38:28,647 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 533 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2861 [2021-06-05 04:38:28,647 INFO L430 AbstractCegarLoop]: === Iteration 539 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:38:28,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:38:28,647 INFO L82 PathProgramCache]: Analyzing trace with hash -815473458, now seen corresponding path program 533 times [2021-06-05 04:38:28,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:38:28,647 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848674816] [2021-06-05 04:38:28,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:38:28,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:38:28,735 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:38:28,735 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:38:28,735 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848674816] [2021-06-05 04:38:28,735 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848674816] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:38:28,735 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906263009] [2021-06-05 04:38:28,735 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 534 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 534 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:38:28,760 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:38:28,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:38:28,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:38:28,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:38:28,866 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:38:28,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1906263009] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:38:28,866 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:38:28,866 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 04:38:28,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979679018] [2021-06-05 04:38:28,867 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:38:28,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:38:28,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:38:28,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:38:28,867 INFO L87 Difference]: Start difference. First operand 118 states and 254 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:38:29,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:38:29,139 INFO L93 Difference]: Finished difference Result 150 states and 315 transitions. [2021-06-05 04:38:29,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:38:29,139 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:38:29,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:38:29,139 INFO L225 Difference]: With dead ends: 150 [2021-06-05 04:38:29,139 INFO L226 Difference]: Without dead ends: 150 [2021-06-05 04:38:29,139 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 253.9ms TimeCoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:38:29,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-06-05 04:38:29,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 114. [2021-06-05 04:38:29,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 2.150442477876106) internal successors, (243), 113 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:38:29,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 243 transitions. [2021-06-05 04:38:29,141 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 243 transitions. Word has length 19 [2021-06-05 04:38:29,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:38:29,141 INFO L482 AbstractCegarLoop]: Abstraction has 114 states and 243 transitions. [2021-06-05 04:38:29,141 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 04:38:29,141 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 243 transitions. [2021-06-05 04:38:29,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:38:29,141 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:38:29,141 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:38:29,341 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2866,534 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:38:29,341 INFO L430 AbstractCegarLoop]: === Iteration 540 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:38:29,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:38:29,342 INFO L82 PathProgramCache]: Analyzing trace with hash -915217718, now seen corresponding path program 534 times [2021-06-05 04:38:29,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:38:29,342 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543429973] [2021-06-05 04:38:29,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:38:29,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:38:29,428 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:38:29,428 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:38:29,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543429973] [2021-06-05 04:38:29,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543429973] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:38:29,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629329744] [2021-06-05 04:38:29,429 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 04:38:29,453 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:38:29,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:38:29,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:38:29,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:38:29,591 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:38:29,591 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:38:29,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:38:29,592 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:38:29,595 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:38:29,595 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 16 treesize of output 12 [2021-06-05 04:38:29,596 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:38:29,643 INFO L628 ElimStorePlain]: treesize reduction 68, result has 36.4 percent of original size [2021-06-05 04:38:29,643 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 04:38:29,645 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 04:38:29,645 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:38:29,658 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:38:29,658 INFO L518 ElimStorePlain]: Eliminatee v_prenex_431 vanished before elimination [2021-06-05 04:38:29,659 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 04:38:29,659 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-06-05 04:38:29,699 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 04:38:29,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [629329744] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:38:29,700 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:38:29,700 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 04:38:29,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001462053] [2021-06-05 04:38:29,700 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:38:29,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:38:29,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:38:29,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:38:29,700 INFO L87 Difference]: Start difference. First operand 114 states and 243 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:38:30,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:38:30,152 INFO L93 Difference]: Finished difference Result 151 states and 307 transitions. [2021-06-05 04:38:30,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:38:30,153 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 04:38:30,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:38:30,153 INFO L225 Difference]: With dead ends: 151 [2021-06-05 04:38:30,153 INFO L226 Difference]: Without dead ends: 151 [2021-06-05 04:38:30,153 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 437.3ms TimeCoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:38:30,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-06-05 04:38:30,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 114. [2021-06-05 04:38:30,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 2.150442477876106) internal successors, (243), 113 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:38:30,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 243 transitions. [2021-06-05 04:38:30,154 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 243 transitions. Word has length 19 [2021-06-05 04:38:30,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:38:30,154 INFO L482 AbstractCegarLoop]: Abstraction has 114 states and 243 transitions. [2021-06-05 04:38:30,154 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 04:38:30,154 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 243 transitions. [2021-06-05 04:38:30,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:38:30,154 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:38:30,154 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:38:30,355 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 535 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2870 [2021-06-05 04:38:30,355 INFO L430 AbstractCegarLoop]: === Iteration 541 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:38:30,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:38:30,355 INFO L82 PathProgramCache]: Analyzing trace with hash 444899022, now seen corresponding path program 535 times [2021-06-05 04:38:30,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:38:30,355 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441026408] [2021-06-05 04:38:30,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:38:30,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:38:30,429 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:38:30,430 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:38:30,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441026408] [2021-06-05 04:38:30,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441026408] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:38:30,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932554053] [2021-06-05 04:38:30,430 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 536 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 536 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:38:30,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:38:30,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:38:30,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:38:30,602 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 04:38:30,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1932554053] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:38:30,602 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:38:30,602 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 04:38:30,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606187184] [2021-06-05 04:38:30,602 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:38:30,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:38:30,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:38:30,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:38:30,602 INFO L87 Difference]: Start difference. First operand 114 states and 243 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:38:31,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:38:31,007 INFO L93 Difference]: Finished difference Result 194 states and 391 transitions. [2021-06-05 04:38:31,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 04:38:31,007 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:38:31,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:38:31,007 INFO L225 Difference]: With dead ends: 194 [2021-06-05 04:38:31,007 INFO L226 Difference]: Without dead ends: 194 [2021-06-05 04:38:31,007 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 356.2ms TimeCoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:38:31,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2021-06-05 04:38:31,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 116. [2021-06-05 04:38:31,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 2.1826086956521737) internal successors, (251), 115 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:38:31,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 251 transitions. [2021-06-05 04:38:31,009 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 251 transitions. Word has length 19 [2021-06-05 04:38:31,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:38:31,009 INFO L482 AbstractCegarLoop]: Abstraction has 116 states and 251 transitions. [2021-06-05 04:38:31,009 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 04:38:31,009 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 251 transitions. [2021-06-05 04:38:31,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:38:31,009 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:38:31,009 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:38:31,209 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 536 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2877 [2021-06-05 04:38:31,209 INFO L430 AbstractCegarLoop]: === Iteration 542 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:38:31,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:38:31,210 INFO L82 PathProgramCache]: Analyzing trace with hash -1788152972, now seen corresponding path program 536 times [2021-06-05 04:38:31,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:38:31,210 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486387614] [2021-06-05 04:38:31,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:38:31,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:38:31,293 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:38:31,293 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:38:31,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486387614] [2021-06-05 04:38:31,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486387614] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:38:31,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680410287] [2021-06-05 04:38:31,293 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 537 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 537 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:38:31,318 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:38:31,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:38:31,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:38:31,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:38:31,459 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 04:38:31,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [680410287] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:38:31,459 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:38:31,460 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 04:38:31,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154677350] [2021-06-05 04:38:31,460 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:38:31,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:38:31,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:38:31,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:38:31,460 INFO L87 Difference]: Start difference. First operand 116 states and 251 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:38:31,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:38:31,831 INFO L93 Difference]: Finished difference Result 129 states and 271 transitions. [2021-06-05 04:38:31,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:38:31,832 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:38:31,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:38:31,832 INFO L225 Difference]: With dead ends: 129 [2021-06-05 04:38:31,832 INFO L226 Difference]: Without dead ends: 125 [2021-06-05 04:38:31,832 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 390.3ms TimeCoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:38:31,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-06-05 04:38:31,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 116. [2021-06-05 04:38:31,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 2.1739130434782608) internal successors, (250), 115 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:38:31,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 250 transitions. [2021-06-05 04:38:31,833 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 250 transitions. Word has length 19 [2021-06-05 04:38:31,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:38:31,833 INFO L482 AbstractCegarLoop]: Abstraction has 116 states and 250 transitions. [2021-06-05 04:38:31,833 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 04:38:31,833 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 250 transitions. [2021-06-05 04:38:31,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:38:31,833 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:38:31,833 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:38:32,034 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2889,537 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:38:32,034 INFO L430 AbstractCegarLoop]: === Iteration 543 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:38:32,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:38:32,034 INFO L82 PathProgramCache]: Analyzing trace with hash -1701271738, now seen corresponding path program 537 times [2021-06-05 04:38:32,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:38:32,034 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97407709] [2021-06-05 04:38:32,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:38:32,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:38:32,108 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 04:38:32,109 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:38:32,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97407709] [2021-06-05 04:38:32,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97407709] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:38:32,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [206886788] [2021-06-05 04:38:32,109 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 538 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 538 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:38:32,134 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:38:32,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:38:32,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:38:32,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:38:32,257 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 04:38:32,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [206886788] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:38:32,257 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:38:32,257 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 04:38:32,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185437059] [2021-06-05 04:38:32,257 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:38:32,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:38:32,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:38:32,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:38:32,258 INFO L87 Difference]: Start difference. First operand 116 states and 250 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:38:32,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:38:32,605 INFO L93 Difference]: Finished difference Result 167 states and 348 transitions. [2021-06-05 04:38:32,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 04:38:32,605 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:38:32,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:38:32,605 INFO L225 Difference]: With dead ends: 167 [2021-06-05 04:38:32,605 INFO L226 Difference]: Without dead ends: 167 [2021-06-05 04:38:32,605 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 338.1ms TimeCoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:38:32,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-06-05 04:38:32,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 115. [2021-06-05 04:38:32,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 2.175438596491228) internal successors, (248), 114 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:38:32,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 248 transitions. [2021-06-05 04:38:32,607 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 248 transitions. Word has length 19 [2021-06-05 04:38:32,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:38:32,607 INFO L482 AbstractCegarLoop]: Abstraction has 115 states and 248 transitions. [2021-06-05 04:38:32,607 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 04:38:32,607 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 248 transitions. [2021-06-05 04:38:32,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:38:32,607 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:38:32,607 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:38:32,807 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 538 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2894 [2021-06-05 04:38:32,807 INFO L430 AbstractCegarLoop]: === Iteration 544 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:38:32,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:38:32,808 INFO L82 PathProgramCache]: Analyzing trace with hash 2000468058, now seen corresponding path program 538 times [2021-06-05 04:38:32,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:38:32,808 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31350793] [2021-06-05 04:38:32,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:38:32,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:38:32,889 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:38:32,890 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:38:32,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31350793] [2021-06-05 04:38:32,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31350793] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:38:32,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368088038] [2021-06-05 04:38:32,890 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 04:38:32,914 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:38:32,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:38:32,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:38:32,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:38:33,037 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:38:33,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [368088038] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:38:33,037 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:38:33,037 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 04:38:33,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424559516] [2021-06-05 04:38:33,038 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:38:33,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:38:33,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:38:33,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:38:33,038 INFO L87 Difference]: Start difference. First operand 115 states and 248 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:38:33,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:38:33,349 INFO L93 Difference]: Finished difference Result 125 states and 263 transitions. [2021-06-05 04:38:33,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:38:33,349 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:38:33,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:38:33,350 INFO L225 Difference]: With dead ends: 125 [2021-06-05 04:38:33,350 INFO L226 Difference]: Without dead ends: 119 [2021-06-05 04:38:33,350 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 317.9ms TimeCoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:38:33,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-06-05 04:38:33,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 115. [2021-06-05 04:38:33,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 2.1666666666666665) internal successors, (247), 114 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:38:33,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 247 transitions. [2021-06-05 04:38:33,351 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 247 transitions. Word has length 19 [2021-06-05 04:38:33,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:38:33,351 INFO L482 AbstractCegarLoop]: Abstraction has 115 states and 247 transitions. [2021-06-05 04:38:33,351 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 04:38:33,351 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 247 transitions. [2021-06-05 04:38:33,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:38:33,351 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:38:33,351 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:38:33,552 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2898,539 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:38:33,553 INFO L430 AbstractCegarLoop]: === Iteration 545 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:38:33,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:38:33,553 INFO L82 PathProgramCache]: Analyzing trace with hash 486911438, now seen corresponding path program 539 times [2021-06-05 04:38:33,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:38:33,553 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244447787] [2021-06-05 04:38:33,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:38:33,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:38:33,625 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:38:33,626 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:38:33,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244447787] [2021-06-05 04:38:33,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244447787] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:38:33,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971790845] [2021-06-05 04:38:33,626 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 04:38:33,650 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:38:33,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:38:33,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:38:33,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:38:33,763 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:38:33,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [971790845] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:38:33,764 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:38:33,764 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 04:38:33,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490928988] [2021-06-05 04:38:33,764 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:38:33,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:38:33,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:38:33,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:38:33,764 INFO L87 Difference]: Start difference. First operand 115 states and 247 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:38:33,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:38:33,992 INFO L93 Difference]: Finished difference Result 146 states and 305 transitions. [2021-06-05 04:38:33,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:38:33,992 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:38:33,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:38:33,993 INFO L225 Difference]: With dead ends: 146 [2021-06-05 04:38:33,993 INFO L226 Difference]: Without dead ends: 146 [2021-06-05 04:38:33,993 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 172.2ms TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:38:33,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-06-05 04:38:33,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 110. [2021-06-05 04:38:33,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 2.1376146788990824) internal successors, (233), 109 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:38:33,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 233 transitions. [2021-06-05 04:38:33,994 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 233 transitions. Word has length 19 [2021-06-05 04:38:33,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:38:33,994 INFO L482 AbstractCegarLoop]: Abstraction has 110 states and 233 transitions. [2021-06-05 04:38:33,994 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 04:38:33,995 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 233 transitions. [2021-06-05 04:38:33,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:38:33,995 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:38:33,995 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:38:34,200 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2903,540 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:38:34,201 INFO L430 AbstractCegarLoop]: === Iteration 546 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:38:34,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:38:34,201 INFO L82 PathProgramCache]: Analyzing trace with hash 1913738142, now seen corresponding path program 540 times [2021-06-05 04:38:34,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:38:34,201 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312707340] [2021-06-05 04:38:34,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:38:34,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:38:34,275 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:38:34,275 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:38:34,275 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312707340] [2021-06-05 04:38:34,276 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312707340] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:38:34,276 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370250778] [2021-06-05 04:38:34,276 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 04:38:34,301 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 04:38:34,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:38:34,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:38:34,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:38:34,477 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:38:34,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [370250778] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:38:34,477 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:38:34,477 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 04:38:34,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436466883] [2021-06-05 04:38:34,478 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:38:34,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:38:34,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:38:34,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:38:34,478 INFO L87 Difference]: Start difference. First operand 110 states and 233 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:38:34,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:38:34,710 INFO L93 Difference]: Finished difference Result 145 states and 289 transitions. [2021-06-05 04:38:34,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:38:34,710 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:38:34,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:38:34,710 INFO L225 Difference]: With dead ends: 145 [2021-06-05 04:38:34,711 INFO L226 Difference]: Without dead ends: 142 [2021-06-05 04:38:34,711 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 206.5ms TimeCoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:38:34,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-06-05 04:38:34,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 117. [2021-06-05 04:38:34,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 2.1551724137931036) internal successors, (250), 116 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:38:34,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 250 transitions. [2021-06-05 04:38:34,712 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 250 transitions. Word has length 19 [2021-06-05 04:38:34,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:38:34,712 INFO L482 AbstractCegarLoop]: Abstraction has 117 states and 250 transitions. [2021-06-05 04:38:34,712 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 04:38:34,712 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 250 transitions. [2021-06-05 04:38:34,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:38:34,712 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:38:34,712 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:38:34,912 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2907,541 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:38:34,913 INFO L430 AbstractCegarLoop]: === Iteration 547 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:38:34,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:38:34,913 INFO L82 PathProgramCache]: Analyzing trace with hash -1955091652, now seen corresponding path program 541 times [2021-06-05 04:38:34,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:38:34,913 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989261223] [2021-06-05 04:38:34,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:38:34,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:38:35,011 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:38:35,011 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:38:35,011 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989261223] [2021-06-05 04:38:35,011 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989261223] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:38:35,011 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399650617] [2021-06-05 04:38:35,011 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 542 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 542 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:38:35,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:38:35,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:38:35,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:38:35,216 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:38:35,216 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:38:35,217 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 16 treesize of output 12 [2021-06-05 04:38:35,217 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:38:35,220 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:38:35,220 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 17 treesize of output 13 [2021-06-05 04:38:35,221 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:38:35,257 INFO L628 ElimStorePlain]: treesize reduction 60, result has 38.8 percent of original size [2021-06-05 04:38:35,257 INFO L518 ElimStorePlain]: Eliminatee v_prenex_438 vanished before elimination [2021-06-05 04:38:35,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:38:35,260 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:38:35,272 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:38:35,272 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 04:38:35,273 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 04:38:35,273 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-06-05 04:38:35,314 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 04:38:35,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [399650617] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:38:35,314 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:38:35,315 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 04:38:35,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63126686] [2021-06-05 04:38:35,315 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:38:35,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:38:35,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:38:35,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:38:35,315 INFO L87 Difference]: Start difference. First operand 117 states and 250 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:38:35,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:38:35,734 INFO L93 Difference]: Finished difference Result 143 states and 286 transitions. [2021-06-05 04:38:35,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:38:35,734 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 04:38:35,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:38:35,735 INFO L225 Difference]: With dead ends: 143 [2021-06-05 04:38:35,735 INFO L226 Difference]: Without dead ends: 143 [2021-06-05 04:38:35,735 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 443.8ms TimeCoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:38:35,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-06-05 04:38:35,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 113. [2021-06-05 04:38:35,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.0892857142857144) internal successors, (234), 112 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:38:35,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 234 transitions. [2021-06-05 04:38:35,736 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 234 transitions. Word has length 19 [2021-06-05 04:38:35,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:38:35,736 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 234 transitions. [2021-06-05 04:38:35,736 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 04:38:35,736 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 234 transitions. [2021-06-05 04:38:35,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:38:35,736 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:38:35,736 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:38:35,936 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2920,542 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:38:35,937 INFO L430 AbstractCegarLoop]: === Iteration 548 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:38:35,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:38:35,937 INFO L82 PathProgramCache]: Analyzing trace with hash -1245043882, now seen corresponding path program 542 times [2021-06-05 04:38:35,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:38:35,937 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538212673] [2021-06-05 04:38:35,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:38:35,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:38:36,014 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:38:36,014 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:38:36,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538212673] [2021-06-05 04:38:36,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538212673] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:38:36,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855696428] [2021-06-05 04:38:36,014 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 543 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 543 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:38:36,052 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:38:36,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:38:36,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 04:38:36,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:38:36,179 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:38:36,179 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:38:36,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:38:36,180 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:38:36,183 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:38:36,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:38:36,184 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:38:36,229 INFO L628 ElimStorePlain]: treesize reduction 70, result has 41.2 percent of original size [2021-06-05 04:38:36,231 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:38:36,231 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 9 treesize of output 5 [2021-06-05 04:38:36,233 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:38:36,249 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:38:36,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-05 04:38:36,252 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:38:36,267 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:38:36,267 INFO L518 ElimStorePlain]: Eliminatee v_prenex_441 vanished before elimination [2021-06-05 04:38:36,269 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 04:38:36,269 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:133, output treesize:22 [2021-06-05 04:38:36,310 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:38:36,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [855696428] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:38:36,310 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:38:36,310 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 04:38:36,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951584062] [2021-06-05 04:38:36,310 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:38:36,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:38:36,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:38:36,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:38:36,311 INFO L87 Difference]: Start difference. First operand 113 states and 234 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:38:36,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:38:36,535 INFO L93 Difference]: Finished difference Result 144 states and 282 transitions. [2021-06-05 04:38:36,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:38:36,535 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 04:38:36,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:38:36,535 INFO L225 Difference]: With dead ends: 144 [2021-06-05 04:38:36,535 INFO L226 Difference]: Without dead ends: 144 [2021-06-05 04:38:36,535 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 230.1ms TimeCoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:38:36,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-06-05 04:38:36,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 112. [2021-06-05 04:38:36,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.09009009009009) internal successors, (232), 111 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:38:36,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 232 transitions. [2021-06-05 04:38:36,537 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 232 transitions. Word has length 19 [2021-06-05 04:38:36,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:38:36,537 INFO L482 AbstractCegarLoop]: Abstraction has 112 states and 232 transitions. [2021-06-05 04:38:36,537 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 04:38:36,537 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 232 transitions. [2021-06-05 04:38:36,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:38:36,537 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:38:36,537 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:38:36,737 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2927,543 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:38:36,738 INFO L430 AbstractCegarLoop]: === Iteration 549 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:38:36,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:38:36,738 INFO L82 PathProgramCache]: Analyzing trace with hash 816871420, now seen corresponding path program 543 times [2021-06-05 04:38:36,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:38:36,738 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257836595] [2021-06-05 04:38:36,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:38:36,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:38:36,868 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 04:38:36,869 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:38:36,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257836595] [2021-06-05 04:38:36,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257836595] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:38:36,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1738972800] [2021-06-05 04:38:36,869 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 544 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 544 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:38:36,902 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:38:36,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:38:36,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:38:36,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:38:37,104 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:38:37,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1738972800] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:38:37,105 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:38:37,105 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 04:38:37,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837628127] [2021-06-05 04:38:37,105 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:38:37,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:38:37,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:38:37,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:38:37,105 INFO L87 Difference]: Start difference. First operand 112 states and 232 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:38:37,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:38:37,535 INFO L93 Difference]: Finished difference Result 122 states and 245 transitions. [2021-06-05 04:38:37,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:38:37,535 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:38:37,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:38:37,536 INFO L225 Difference]: With dead ends: 122 [2021-06-05 04:38:37,536 INFO L226 Difference]: Without dead ends: 118 [2021-06-05 04:38:37,536 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 484.2ms TimeCoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:38:37,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-06-05 04:38:37,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 112. [2021-06-05 04:38:37,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.081081081081081) internal successors, (231), 111 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:38:37,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 231 transitions. [2021-06-05 04:38:37,537 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 231 transitions. Word has length 19 [2021-06-05 04:38:37,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:38:37,537 INFO L482 AbstractCegarLoop]: Abstraction has 112 states and 231 transitions. [2021-06-05 04:38:37,537 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 04:38:37,537 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 231 transitions. [2021-06-05 04:38:37,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:38:37,537 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:38:37,537 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:38:37,737 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2931,544 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:38:37,738 INFO L430 AbstractCegarLoop]: === Iteration 550 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:38:37,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:38:37,738 INFO L82 PathProgramCache]: Analyzing trace with hash 903752654, now seen corresponding path program 544 times [2021-06-05 04:38:37,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:38:37,738 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292373367] [2021-06-05 04:38:37,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:38:37,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:38:37,816 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:38:37,816 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:38:37,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292373367] [2021-06-05 04:38:37,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292373367] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:38:37,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871276249] [2021-06-05 04:38:37,817 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 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 04:38:37,841 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:38:37,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:38:37,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 04:38:37,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:38:37,975 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:38:37,976 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:38:37,976 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 17 treesize of output 13 [2021-06-05 04:38:37,977 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:38:37,978 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:38:37,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:38:37,979 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:38:37,997 INFO L628 ElimStorePlain]: treesize reduction 28, result has 42.9 percent of original size [2021-06-05 04:38:37,998 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:38:37,999 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 9 treesize of output 5 [2021-06-05 04:38:38,000 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:38:38,005 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:38:38,006 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:38:38,006 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:63, output treesize:9 [2021-06-05 04:38:38,024 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:38:38,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [871276249] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:38:38,024 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:38:38,025 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 04:38:38,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756967022] [2021-06-05 04:38:38,025 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:38:38,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:38:38,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:38:38,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:38:38,025 INFO L87 Difference]: Start difference. First operand 112 states and 231 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:38:38,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:38:38,200 INFO L93 Difference]: Finished difference Result 136 states and 273 transitions. [2021-06-05 04:38:38,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:38:38,200 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 04:38:38,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:38:38,201 INFO L225 Difference]: With dead ends: 136 [2021-06-05 04:38:38,201 INFO L226 Difference]: Without dead ends: 136 [2021-06-05 04:38:38,201 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 177.8ms TimeCoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:38:38,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-06-05 04:38:38,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 111. [2021-06-05 04:38:38,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.081818181818182) internal successors, (229), 110 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:38:38,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 229 transitions. [2021-06-05 04:38:38,202 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 229 transitions. Word has length 19 [2021-06-05 04:38:38,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:38:38,202 INFO L482 AbstractCegarLoop]: Abstraction has 111 states and 229 transitions. [2021-06-05 04:38:38,202 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 04:38:38,202 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 229 transitions. [2021-06-05 04:38:38,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:38:38,202 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:38:38,202 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:38:38,402 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 545 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2937 [2021-06-05 04:38:38,403 INFO L430 AbstractCegarLoop]: === Iteration 551 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:38:38,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:38:38,403 INFO L82 PathProgramCache]: Analyzing trace with hash 310525154, now seen corresponding path program 545 times [2021-06-05 04:38:38,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:38:38,403 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822949568] [2021-06-05 04:38:38,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:38:38,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:38:38,500 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:38:38,500 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:38:38,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822949568] [2021-06-05 04:38:38,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822949568] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:38:38,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993797114] [2021-06-05 04:38:38,500 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 546 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 546 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:38:38,524 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:38:38,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:38:38,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:38:38,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:38:38,680 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 04:38:38,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [993797114] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:38:38,681 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:38:38,681 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 04:38:38,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671893357] [2021-06-05 04:38:38,681 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:38:38,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:38:38,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:38:38,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:38:38,681 INFO L87 Difference]: Start difference. First operand 111 states and 229 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:38:39,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:38:39,057 INFO L93 Difference]: Finished difference Result 121 states and 242 transitions. [2021-06-05 04:38:39,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:38:39,057 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:38:39,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:38:39,057 INFO L225 Difference]: With dead ends: 121 [2021-06-05 04:38:39,057 INFO L226 Difference]: Without dead ends: 115 [2021-06-05 04:38:39,057 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 377.2ms TimeCoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:38:39,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-06-05 04:38:39,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 111. [2021-06-05 04:38:39,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.0727272727272728) internal successors, (228), 110 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:38:39,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 228 transitions. [2021-06-05 04:38:39,058 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 228 transitions. Word has length 19 [2021-06-05 04:38:39,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:38:39,058 INFO L482 AbstractCegarLoop]: Abstraction has 111 states and 228 transitions. [2021-06-05 04:38:39,061 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 04:38:39,061 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 228 transitions. [2021-06-05 04:38:39,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:38:39,061 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:38:39,061 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:38:39,262 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2939,546 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:38:39,262 INFO L430 AbstractCegarLoop]: === Iteration 552 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:38:39,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:38:39,262 INFO L82 PathProgramCache]: Analyzing trace with hash -1203031466, now seen corresponding path program 546 times [2021-06-05 04:38:39,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:38:39,262 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416826228] [2021-06-05 04:38:39,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:38:39,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:38:39,338 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:38:39,339 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:38:39,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416826228] [2021-06-05 04:38:39,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416826228] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:38:39,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335843122] [2021-06-05 04:38:39,339 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 547 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 547 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:38:39,363 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:38:39,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:38:39,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 04:38:39,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:38:39,484 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:38:39,485 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:38:39,485 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 17 treesize of output 13 [2021-06-05 04:38:39,485 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:38:39,487 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:38:39,487 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 17 treesize of output 13 [2021-06-05 04:38:39,488 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:38:39,505 INFO L628 ElimStorePlain]: treesize reduction 34, result has 30.6 percent of original size [2021-06-05 04:38:39,505 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 04:38:39,506 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 04:38:39,506 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:63, output treesize:9 [2021-06-05 04:38:39,525 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 04:38:39,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1335843122] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:38:39,525 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:38:39,525 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 04:38:39,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170091073] [2021-06-05 04:38:39,525 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:38:39,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:38:39,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:38:39,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:38:39,526 INFO L87 Difference]: Start difference. First operand 111 states and 228 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:38:39,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:38:39,689 INFO L93 Difference]: Finished difference Result 143 states and 288 transitions. [2021-06-05 04:38:39,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:38:39,690 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 04:38:39,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:38:39,690 INFO L225 Difference]: With dead ends: 143 [2021-06-05 04:38:39,690 INFO L226 Difference]: Without dead ends: 143 [2021-06-05 04:38:39,690 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 165.0ms TimeCoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:38:39,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-06-05 04:38:39,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 110. [2021-06-05 04:38:39,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 2.073394495412844) internal successors, (226), 109 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:38:39,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 226 transitions. [2021-06-05 04:38:39,691 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 226 transitions. Word has length 19 [2021-06-05 04:38:39,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:38:39,691 INFO L482 AbstractCegarLoop]: Abstraction has 110 states and 226 transitions. [2021-06-05 04:38:39,691 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 04:38:39,691 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 226 transitions. [2021-06-05 04:38:39,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:38:39,691 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:38:39,691 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:38:39,891 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2944,547 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:38:39,892 INFO L430 AbstractCegarLoop]: === Iteration 553 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:38:39,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:38:39,892 INFO L82 PathProgramCache]: Analyzing trace with hash 1793660092, now seen corresponding path program 547 times [2021-06-05 04:38:39,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:38:39,892 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937264441] [2021-06-05 04:38:39,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:38:39,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:38:39,966 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:38:39,967 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:38:39,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937264441] [2021-06-05 04:38:39,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937264441] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:38:39,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750666112] [2021-06-05 04:38:39,967 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 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 04:38:39,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:38:39,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:38:39,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:38:40,120 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:38:40,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [750666112] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:38:40,120 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:38:40,120 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 04:38:40,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120668177] [2021-06-05 04:38:40,120 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:38:40,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:38:40,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:38:40,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:38:40,121 INFO L87 Difference]: Start difference. First operand 110 states and 226 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:38:40,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:38:40,347 INFO L93 Difference]: Finished difference Result 118 states and 236 transitions. [2021-06-05 04:38:40,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:38:40,347 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:38:40,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:38:40,347 INFO L225 Difference]: With dead ends: 118 [2021-06-05 04:38:40,347 INFO L226 Difference]: Without dead ends: 110 [2021-06-05 04:38:40,347 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 243.5ms TimeCoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:38:40,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-06-05 04:38:40,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2021-06-05 04:38:40,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 2.0642201834862384) internal successors, (225), 109 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:38:40,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 225 transitions. [2021-06-05 04:38:40,348 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 225 transitions. Word has length 19 [2021-06-05 04:38:40,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:38:40,348 INFO L482 AbstractCegarLoop]: Abstraction has 110 states and 225 transitions. [2021-06-05 04:38:40,349 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 04:38:40,349 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 225 transitions. [2021-06-05 04:38:40,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:38:40,349 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:38:40,349 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:38:40,549 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 548 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2946 [2021-06-05 04:38:40,549 INFO L430 AbstractCegarLoop]: === Iteration 554 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:38:40,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:38:40,549 INFO L82 PathProgramCache]: Analyzing trace with hash -2088829746, now seen corresponding path program 548 times [2021-06-05 04:38:40,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:38:40,550 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358097514] [2021-06-05 04:38:40,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:38:40,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:38:40,622 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:38:40,622 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:38:40,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358097514] [2021-06-05 04:38:40,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358097514] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:38:40,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868708267] [2021-06-05 04:38:40,622 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 04:38:40,646 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:38:40,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:38:40,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 04:38:40,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:38:40,757 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:38:40,757 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:38:40,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:38:40,758 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:38:40,760 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:38:40,760 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 17 treesize of output 13 [2021-06-05 04:38:40,761 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:38:40,782 INFO L628 ElimStorePlain]: treesize reduction 28, result has 42.9 percent of original size [2021-06-05 04:38:40,784 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:38:40,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-06-05 04:38:40,785 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:38:40,791 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:38:40,791 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 04:38:40,791 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:63, output treesize:9 [2021-06-05 04:38:40,810 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:38:40,810 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [868708267] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:38:40,810 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:38:40,810 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 04:38:40,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100690404] [2021-06-05 04:38:40,810 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:38:40,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:38:40,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:38:40,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:38:40,810 INFO L87 Difference]: Start difference. First operand 110 states and 225 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:38:40,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:38:40,960 INFO L93 Difference]: Finished difference Result 124 states and 249 transitions. [2021-06-05 04:38:40,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:38:40,960 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 04:38:40,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:38:40,960 INFO L225 Difference]: With dead ends: 124 [2021-06-05 04:38:40,960 INFO L226 Difference]: Without dead ends: 124 [2021-06-05 04:38:40,960 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 152.9ms TimeCoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:38:40,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-06-05 04:38:40,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 101. [2021-06-05 04:38:40,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 2.03) internal successors, (203), 100 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:38:40,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 203 transitions. [2021-06-05 04:38:40,961 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 203 transitions. Word has length 19 [2021-06-05 04:38:40,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:38:40,961 INFO L482 AbstractCegarLoop]: Abstraction has 101 states and 203 transitions. [2021-06-05 04:38:40,961 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 04:38:40,961 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 203 transitions. [2021-06-05 04:38:40,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:38:40,962 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:38:40,962 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:38:41,162 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2951,549 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:38:41,162 INFO L430 AbstractCegarLoop]: === Iteration 555 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:38:41,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:38:41,162 INFO L82 PathProgramCache]: Analyzing trace with hash 640804434, now seen corresponding path program 549 times [2021-06-05 04:38:41,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:38:41,162 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196536603] [2021-06-05 04:38:41,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:38:41,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:38:41,242 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:38:41,242 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:38:41,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196536603] [2021-06-05 04:38:41,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196536603] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:38:41,243 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408644269] [2021-06-05 04:38:41,243 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 550 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 550 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:38:41,268 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 04:38:41,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:38:41,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:38:41,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:38:41,457 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:38:41,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [408644269] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:38:41,457 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:38:41,457 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 04:38:41,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310810105] [2021-06-05 04:38:41,457 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:38:41,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:38:41,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:38:41,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:38:41,458 INFO L87 Difference]: Start difference. First operand 101 states and 203 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:38:41,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:38:41,730 INFO L93 Difference]: Finished difference Result 155 states and 295 transitions. [2021-06-05 04:38:41,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:38:41,730 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:38:41,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:38:41,730 INFO L225 Difference]: With dead ends: 155 [2021-06-05 04:38:41,730 INFO L226 Difference]: Without dead ends: 152 [2021-06-05 04:38:41,730 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 305.2ms TimeCoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:38:41,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-06-05 04:38:41,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 109. [2021-06-05 04:38:41,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 2.074074074074074) internal successors, (224), 108 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:38:41,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 224 transitions. [2021-06-05 04:38:41,731 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 224 transitions. Word has length 19 [2021-06-05 04:38:41,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:38:41,731 INFO L482 AbstractCegarLoop]: Abstraction has 109 states and 224 transitions. [2021-06-05 04:38:41,731 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 04:38:41,731 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 224 transitions. [2021-06-05 04:38:41,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:38:41,732 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:38:41,732 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:38:41,932 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 550 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2953 [2021-06-05 04:38:41,932 INFO L430 AbstractCegarLoop]: === Iteration 556 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:38:41,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:38:41,932 INFO L82 PathProgramCache]: Analyzing trace with hash 416872966, now seen corresponding path program 550 times [2021-06-05 04:38:41,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:38:41,932 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370923298] [2021-06-05 04:38:41,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:38:41,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:38:42,037 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:38:42,037 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:38:42,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370923298] [2021-06-05 04:38:42,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370923298] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:38:42,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858586813] [2021-06-05 04:38:42,037 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 551 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 551 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:38:42,061 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:38:42,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:38:42,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:38:42,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:38:42,231 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:38:42,232 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:38:42,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:38:42,233 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:38:42,235 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:38:42,235 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 15 treesize of output 11 [2021-06-05 04:38:42,236 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:38:42,274 INFO L628 ElimStorePlain]: treesize reduction 68, result has 36.4 percent of original size [2021-06-05 04:38:42,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:38:42,277 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:38:42,289 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:38:42,289 INFO L518 ElimStorePlain]: Eliminatee v_prenex_449 vanished before elimination [2021-06-05 04:38:42,289 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 04:38:42,290 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:38:42,290 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-06-05 04:38:42,331 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 04:38:42,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1858586813] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:38:42,331 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:38:42,332 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 04:38:42,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352176726] [2021-06-05 04:38:42,332 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:38:42,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:38:42,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:38:42,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:38:42,332 INFO L87 Difference]: Start difference. First operand 109 states and 224 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:38:42,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:38:42,900 INFO L93 Difference]: Finished difference Result 135 states and 264 transitions. [2021-06-05 04:38:42,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:38:42,900 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 04:38:42,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:38:42,900 INFO L225 Difference]: With dead ends: 135 [2021-06-05 04:38:42,900 INFO L226 Difference]: Without dead ends: 135 [2021-06-05 04:38:42,900 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 610.2ms TimeCoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:38:42,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-06-05 04:38:42,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 109. [2021-06-05 04:38:42,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 2.074074074074074) internal successors, (224), 108 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:38:42,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 224 transitions. [2021-06-05 04:38:42,902 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 224 transitions. Word has length 19 [2021-06-05 04:38:42,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:38:42,902 INFO L482 AbstractCegarLoop]: Abstraction has 109 states and 224 transitions. [2021-06-05 04:38:42,902 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 04:38:42,902 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 224 transitions. [2021-06-05 04:38:42,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:38:42,902 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:38:42,902 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:38:43,108 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2966,551 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:38:43,109 INFO L430 AbstractCegarLoop]: === Iteration 557 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:38:43,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:38:43,109 INFO L82 PathProgramCache]: Analyzing trace with hash -993917866, now seen corresponding path program 551 times [2021-06-05 04:38:43,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:38:43,109 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391511566] [2021-06-05 04:38:43,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:38:43,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:38:43,211 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:38:43,211 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:38:43,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391511566] [2021-06-05 04:38:43,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391511566] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:38:43,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866609465] [2021-06-05 04:38:43,212 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 552 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 552 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:38:43,236 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:38:43,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:38:43,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:38:43,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:38:43,428 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:38:43,428 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:38:43,428 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 04:38:43,429 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:38:43,431 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:38:43,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:38:43,432 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:38:43,470 INFO L628 ElimStorePlain]: treesize reduction 60, result has 38.8 percent of original size [2021-06-05 04:38:43,470 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 04:38:43,472 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 7 treesize of output 5 [2021-06-05 04:38:43,473 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:38:43,486 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:38:43,486 INFO L518 ElimStorePlain]: Eliminatee v_prenex_452 vanished before elimination [2021-06-05 04:38:43,486 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:38:43,487 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-06-05 04:38:43,517 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 04:38:43,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [866609465] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:38:43,517 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:38:43,517 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 04:38:43,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244868494] [2021-06-05 04:38:43,517 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:38:43,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:38:43,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:38:43,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:38:43,517 INFO L87 Difference]: Start difference. First operand 109 states and 224 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:38:44,122 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 66 [2021-06-05 04:38:44,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:38:44,206 INFO L93 Difference]: Finished difference Result 137 states and 265 transitions. [2021-06-05 04:38:44,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:38:44,206 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:38:44,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:38:44,206 INFO L225 Difference]: With dead ends: 137 [2021-06-05 04:38:44,206 INFO L226 Difference]: Without dead ends: 135 [2021-06-05 04:38:44,206 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 716.5ms TimeCoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:38:44,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-06-05 04:38:44,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 109. [2021-06-05 04:38:44,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 2.064814814814815) internal successors, (223), 108 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:38:44,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 223 transitions. [2021-06-05 04:38:44,208 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 223 transitions. Word has length 19 [2021-06-05 04:38:44,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:38:44,208 INFO L482 AbstractCegarLoop]: Abstraction has 109 states and 223 transitions. [2021-06-05 04:38:44,208 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 04:38:44,208 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 223 transitions. [2021-06-05 04:38:44,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:38:44,208 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:38:44,208 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:38:44,408 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 552 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2973 [2021-06-05 04:38:44,408 INFO L430 AbstractCegarLoop]: === Iteration 558 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:38:44,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:38:44,409 INFO L82 PathProgramCache]: Analyzing trace with hash 1776989706, now seen corresponding path program 552 times [2021-06-05 04:38:44,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:38:44,409 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532603969] [2021-06-05 04:38:44,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:38:44,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:38:44,489 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:38:44,489 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:38:44,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532603969] [2021-06-05 04:38:44,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532603969] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:38:44,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082873645] [2021-06-05 04:38:44,489 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 553 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 553 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:38:44,515 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:38:44,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:38:44,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 04:38:44,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:38:44,657 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:38:44,657 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:38:44,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 04:38:44,658 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:38:44,660 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:38:44,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 04:38:44,661 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:38:44,705 INFO L628 ElimStorePlain]: treesize reduction 72, result has 39.5 percent of original size [2021-06-05 04:38:44,705 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 04:38:44,707 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:38:44,708 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 17 treesize of output 13 [2021-06-05 04:38:44,708 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:38:44,724 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:38:44,726 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:38:44,726 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 9 treesize of output 5 [2021-06-05 04:38:44,727 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:38:44,741 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:38:44,743 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 04:38:44,743 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:133, output treesize:22 [2021-06-05 04:38:44,784 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:38:44,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2082873645] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:38:44,784 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:38:44,784 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 04:38:44,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136665378] [2021-06-05 04:38:44,784 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:38:44,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:38:44,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:38:44,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:38:44,785 INFO L87 Difference]: Start difference. First operand 109 states and 223 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:38:45,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:38:45,069 INFO L93 Difference]: Finished difference Result 154 states and 291 transitions. [2021-06-05 04:38:45,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:38:45,069 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 04:38:45,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:38:45,070 INFO L225 Difference]: With dead ends: 154 [2021-06-05 04:38:45,070 INFO L226 Difference]: Without dead ends: 154 [2021-06-05 04:38:45,070 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 313.1ms TimeCoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:38:45,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-06-05 04:38:45,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 108. [2021-06-05 04:38:45,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 2.0654205607476634) internal successors, (221), 107 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:38:45,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 221 transitions. [2021-06-05 04:38:45,071 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 221 transitions. Word has length 19 [2021-06-05 04:38:45,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:38:45,071 INFO L482 AbstractCegarLoop]: Abstraction has 108 states and 221 transitions. [2021-06-05 04:38:45,071 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 04:38:45,071 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 221 transitions. [2021-06-05 04:38:45,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:38:45,071 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:38:45,071 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:38:45,271 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 553 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2981 [2021-06-05 04:38:45,272 INFO L430 AbstractCegarLoop]: === Iteration 559 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:38:45,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:38:45,272 INFO L82 PathProgramCache]: Analyzing trace with hash -456062288, now seen corresponding path program 553 times [2021-06-05 04:38:45,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:38:45,272 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685354797] [2021-06-05 04:38:45,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:38:45,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:38:45,386 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:38:45,387 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:38:45,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685354797] [2021-06-05 04:38:45,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685354797] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:38:45,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368694365] [2021-06-05 04:38:45,387 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 554 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 554 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:38:45,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:38:45,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:38:45,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:38:45,590 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:38:45,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1368694365] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:38:45,590 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:38:45,590 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 04:38:45,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890747479] [2021-06-05 04:38:45,590 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:38:45,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:38:45,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:38:45,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:38:45,591 INFO L87 Difference]: Start difference. First operand 108 states and 221 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:38:46,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:38:46,198 INFO L93 Difference]: Finished difference Result 134 states and 257 transitions. [2021-06-05 04:38:46,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:38:46,199 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:38:46,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:38:46,199 INFO L225 Difference]: With dead ends: 134 [2021-06-05 04:38:46,199 INFO L226 Difference]: Without dead ends: 130 [2021-06-05 04:38:46,199 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 640.2ms TimeCoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:38:46,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-06-05 04:38:46,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 108. [2021-06-05 04:38:46,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 2.05607476635514) internal successors, (220), 107 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:38:46,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 220 transitions. [2021-06-05 04:38:46,200 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 220 transitions. Word has length 19 [2021-06-05 04:38:46,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:38:46,200 INFO L482 AbstractCegarLoop]: Abstraction has 108 states and 220 transitions. [2021-06-05 04:38:46,200 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 04:38:46,200 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 220 transitions. [2021-06-05 04:38:46,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:38:46,200 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:38:46,200 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:38:46,401 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 554 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2985 [2021-06-05 04:38:46,401 INFO L430 AbstractCegarLoop]: === Iteration 560 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:38:46,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:38:46,401 INFO L82 PathProgramCache]: Analyzing trace with hash -369181054, now seen corresponding path program 554 times [2021-06-05 04:38:46,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:38:46,401 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525969653] [2021-06-05 04:38:46,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:38:46,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:38:46,480 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 04:38:46,481 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:38:46,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525969653] [2021-06-05 04:38:46,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525969653] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:38:46,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476940097] [2021-06-05 04:38:46,481 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 555 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 555 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:38:46,505 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:38:46,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:38:46,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 04:38:46,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:38:46,661 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:38:46,661 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:38:46,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:38:46,662 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:38:46,664 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:38:46,664 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 17 treesize of output 13 [2021-06-05 04:38:46,665 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:38:46,689 INFO L628 ElimStorePlain]: treesize reduction 28, result has 42.9 percent of original size [2021-06-05 04:38:46,690 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:38:46,691 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 9 treesize of output 5 [2021-06-05 04:38:46,692 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:38:46,697 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:38:46,698 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 04:38:46,698 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:63, output treesize:9 [2021-06-05 04:38:46,716 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 04:38:46,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [476940097] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:38:46,716 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:38:46,716 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 04:38:46,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220387018] [2021-06-05 04:38:46,716 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:38:46,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:38:46,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:38:46,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:38:46,717 INFO L87 Difference]: Start difference. First operand 108 states and 220 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:38:46,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:38:46,932 INFO L93 Difference]: Finished difference Result 148 states and 285 transitions. [2021-06-05 04:38:46,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:38:46,932 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 04:38:46,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:38:46,932 INFO L225 Difference]: With dead ends: 148 [2021-06-05 04:38:46,932 INFO L226 Difference]: Without dead ends: 148 [2021-06-05 04:38:46,932 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 266.7ms TimeCoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:38:46,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-06-05 04:38:46,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 107. [2021-06-05 04:38:46,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 2.056603773584906) internal successors, (218), 106 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:38:46,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 218 transitions. [2021-06-05 04:38:46,933 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 218 transitions. Word has length 19 [2021-06-05 04:38:46,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:38:46,934 INFO L482 AbstractCegarLoop]: Abstraction has 107 states and 218 transitions. [2021-06-05 04:38:46,934 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 04:38:46,934 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 218 transitions. [2021-06-05 04:38:46,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:38:46,934 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:38:46,934 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:38:47,134 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2990,555 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:38:47,134 INFO L430 AbstractCegarLoop]: === Iteration 561 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:38:47,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:38:47,134 INFO L82 PathProgramCache]: Analyzing trace with hash -962408554, now seen corresponding path program 555 times [2021-06-05 04:38:47,135 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:38:47,135 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137116290] [2021-06-05 04:38:47,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:38:47,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:38:47,226 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:38:47,226 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:38:47,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137116290] [2021-06-05 04:38:47,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137116290] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:38:47,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835906384] [2021-06-05 04:38:47,226 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 556 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 556 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:38:47,251 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:38:47,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:38:47,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:38:47,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:38:47,412 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:38:47,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [835906384] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:38:47,412 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:38:47,412 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 04:38:47,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6937717] [2021-06-05 04:38:47,412 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:38:47,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:38:47,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:38:47,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:38:47,413 INFO L87 Difference]: Start difference. First operand 107 states and 218 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:38:47,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:38:47,914 INFO L93 Difference]: Finished difference Result 135 states and 257 transitions. [2021-06-05 04:38:47,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:38:47,914 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:38:47,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:38:47,915 INFO L225 Difference]: With dead ends: 135 [2021-06-05 04:38:47,915 INFO L226 Difference]: Without dead ends: 129 [2021-06-05 04:38:47,915 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 528.8ms TimeCoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:38:47,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-06-05 04:38:47,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 107. [2021-06-05 04:38:47,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 2.047169811320755) internal successors, (217), 106 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:38:47,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 217 transitions. [2021-06-05 04:38:47,916 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 217 transitions. Word has length 19 [2021-06-05 04:38:47,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:38:47,916 INFO L482 AbstractCegarLoop]: Abstraction has 107 states and 217 transitions. [2021-06-05 04:38:47,916 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 04:38:47,916 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 217 transitions. [2021-06-05 04:38:47,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:38:47,916 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:38:47,916 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:38:48,116 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 556 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2992 [2021-06-05 04:38:48,117 INFO L430 AbstractCegarLoop]: === Iteration 562 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:38:48,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:38:48,117 INFO L82 PathProgramCache]: Analyzing trace with hash 1819002122, now seen corresponding path program 556 times [2021-06-05 04:38:48,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:38:48,117 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462749905] [2021-06-05 04:38:48,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:38:48,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:38:48,193 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:38:48,193 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:38:48,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462749905] [2021-06-05 04:38:48,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462749905] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:38:48,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [21587512] [2021-06-05 04:38:48,193 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 557 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 557 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:38:48,217 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:38:48,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:38:48,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 04:38:48,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:38:48,359 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:38:48,360 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:38:48,360 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 17 treesize of output 13 [2021-06-05 04:38:48,361 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:38:48,362 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:38:48,363 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 17 treesize of output 13 [2021-06-05 04:38:48,363 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:38:48,381 INFO L628 ElimStorePlain]: treesize reduction 28, result has 42.9 percent of original size [2021-06-05 04:38:48,383 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:38:48,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-06-05 04:38:48,384 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:38:48,389 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:38:48,390 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:38:48,390 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:63, output treesize:9 [2021-06-05 04:38:48,409 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:38:48,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [21587512] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:38:48,409 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:38:48,409 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 04:38:48,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805761329] [2021-06-05 04:38:48,409 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:38:48,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:38:48,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:38:48,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:38:48,409 INFO L87 Difference]: Start difference. First operand 107 states and 217 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:38:48,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:38:48,639 INFO L93 Difference]: Finished difference Result 157 states and 303 transitions. [2021-06-05 04:38:48,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:38:48,640 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 04:38:48,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:38:48,640 INFO L225 Difference]: With dead ends: 157 [2021-06-05 04:38:48,640 INFO L226 Difference]: Without dead ends: 157 [2021-06-05 04:38:48,640 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 253.1ms TimeCoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:38:48,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-06-05 04:38:48,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 106. [2021-06-05 04:38:48,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 2.0476190476190474) internal successors, (215), 105 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:38:48,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 215 transitions. [2021-06-05 04:38:48,641 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 215 transitions. Word has length 19 [2021-06-05 04:38:48,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:38:48,641 INFO L482 AbstractCegarLoop]: Abstraction has 106 states and 215 transitions. [2021-06-05 04:38:48,641 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 04:38:48,641 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 215 transitions. [2021-06-05 04:38:48,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:38:48,642 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:38:48,642 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:38:48,842 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2997,557 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:38:48,842 INFO L430 AbstractCegarLoop]: === Iteration 563 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:38:48,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:38:48,842 INFO L82 PathProgramCache]: Analyzing trace with hash 520726384, now seen corresponding path program 557 times [2021-06-05 04:38:48,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:38:48,842 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315284045] [2021-06-05 04:38:48,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:38:48,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:38:48,925 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:38:48,925 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:38:48,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315284045] [2021-06-05 04:38:48,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315284045] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:38:48,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536280241] [2021-06-05 04:38:48,925 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 558 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 558 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:38:48,949 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:38:48,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:38:48,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:38:48,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:38:49,094 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:38:49,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [536280241] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:38:49,095 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:38:49,095 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 04:38:49,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026986026] [2021-06-05 04:38:49,095 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:38:49,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:38:49,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:38:49,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:38:49,095 INFO L87 Difference]: Start difference. First operand 106 states and 215 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:38:49,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:38:49,574 INFO L93 Difference]: Finished difference Result 136 states and 257 transitions. [2021-06-05 04:38:49,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:38:49,574 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:38:49,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:38:49,574 INFO L225 Difference]: With dead ends: 136 [2021-06-05 04:38:49,574 INFO L226 Difference]: Without dead ends: 128 [2021-06-05 04:38:49,575 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 498.1ms TimeCoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:38:49,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-06-05 04:38:49,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 106. [2021-06-05 04:38:49,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 2.038095238095238) internal successors, (214), 105 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:38:49,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 214 transitions. [2021-06-05 04:38:49,576 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 214 transitions. Word has length 19 [2021-06-05 04:38:49,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:38:49,576 INFO L482 AbstractCegarLoop]: Abstraction has 106 states and 214 transitions. [2021-06-05 04:38:49,576 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 04:38:49,576 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 214 transitions. [2021-06-05 04:38:49,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:38:49,576 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:38:49,576 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:38:49,776 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2999,558 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:38:49,776 INFO L430 AbstractCegarLoop]: === Iteration 564 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:38:49,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:38:49,777 INFO L82 PathProgramCache]: Analyzing trace with hash 933203842, now seen corresponding path program 558 times [2021-06-05 04:38:49,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:38:49,777 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355191833] [2021-06-05 04:38:49,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:38:49,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:38:49,850 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:38:49,850 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:38:49,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355191833] [2021-06-05 04:38:49,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355191833] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:38:49,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335467575] [2021-06-05 04:38:49,851 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 559 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 559 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:38:49,876 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:38:49,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:38:49,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 04:38:49,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:38:50,010 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:38:50,010 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:38:50,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:38:50,011 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:38:50,013 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:38:50,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:38:50,014 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:38:50,032 INFO L628 ElimStorePlain]: treesize reduction 28, result has 42.9 percent of original size [2021-06-05 04:38:50,034 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:38:50,034 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 9 treesize of output 5 [2021-06-05 04:38:50,035 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:38:50,040 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:38:50,041 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 04:38:50,041 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:63, output treesize:9 [2021-06-05 04:38:50,059 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:38:50,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [335467575] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:38:50,059 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:38:50,059 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 04:38:50,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217078768] [2021-06-05 04:38:50,060 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:38:50,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:38:50,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:38:50,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:38:50,060 INFO L87 Difference]: Start difference. First operand 106 states and 214 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:38:50,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:38:50,279 INFO L93 Difference]: Finished difference Result 166 states and 321 transitions. [2021-06-05 04:38:50,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:38:50,279 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 04:38:50,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:38:50,279 INFO L225 Difference]: With dead ends: 166 [2021-06-05 04:38:50,279 INFO L226 Difference]: Without dead ends: 166 [2021-06-05 04:38:50,279 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 238.9ms TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:38:50,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-06-05 04:38:50,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 105. [2021-06-05 04:38:50,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 2.0384615384615383) internal successors, (212), 104 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:38:50,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 212 transitions. [2021-06-05 04:38:50,280 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 212 transitions. Word has length 19 [2021-06-05 04:38:50,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:38:50,280 INFO L482 AbstractCegarLoop]: Abstraction has 105 states and 212 transitions. [2021-06-05 04:38:50,280 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 04:38:50,281 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 212 transitions. [2021-06-05 04:38:50,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:38:50,281 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:38:50,281 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:38:50,481 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 559 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3004 [2021-06-05 04:38:50,481 INFO L430 AbstractCegarLoop]: === Iteration 565 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:38:50,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:38:50,481 INFO L82 PathProgramCache]: Analyzing trace with hash -1591702246, now seen corresponding path program 559 times [2021-06-05 04:38:50,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:38:50,481 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92018707] [2021-06-05 04:38:50,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:38:50,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:38:50,558 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 04:38:50,558 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:38:50,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92018707] [2021-06-05 04:38:50,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92018707] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:38:50,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834249512] [2021-06-05 04:38:50,558 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 560 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 560 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:38:50,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:38:50,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:38:50,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:38:50,678 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:38:50,678 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1834249512] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:38:50,678 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:38:50,678 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-06-05 04:38:50,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078731783] [2021-06-05 04:38:50,678 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:38:50,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:38:50,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:38:50,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:38:50,679 INFO L87 Difference]: Start difference. First operand 105 states and 212 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:38:51,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:38:51,011 INFO L93 Difference]: Finished difference Result 116 states and 227 transitions. [2021-06-05 04:38:51,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:38:51,011 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:38:51,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:38:51,011 INFO L225 Difference]: With dead ends: 116 [2021-06-05 04:38:51,011 INFO L226 Difference]: Without dead ends: 106 [2021-06-05 04:38:51,011 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 381.7ms TimeCoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:38:51,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-06-05 04:38:51,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 103. [2021-06-05 04:38:51,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 2.0392156862745097) internal successors, (208), 102 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:38:51,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 208 transitions. [2021-06-05 04:38:51,012 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 208 transitions. Word has length 19 [2021-06-05 04:38:51,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:38:51,012 INFO L482 AbstractCegarLoop]: Abstraction has 103 states and 208 transitions. [2021-06-05 04:38:51,012 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 04:38:51,012 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 208 transitions. [2021-06-05 04:38:51,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:38:51,013 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:38:51,013 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:38:51,213 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3006,560 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:38:51,213 INFO L430 AbstractCegarLoop]: === Iteration 566 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:38:51,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:38:51,213 INFO L82 PathProgramCache]: Analyzing trace with hash -1601710514, now seen corresponding path program 560 times [2021-06-05 04:38:51,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:38:51,213 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735276623] [2021-06-05 04:38:51,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:38:51,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:38:51,282 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 04:38:51,283 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:38:51,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735276623] [2021-06-05 04:38:51,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735276623] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:38:51,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2095848256] [2021-06-05 04:38:51,283 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 561 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 561 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:38:51,307 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:38:51,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:38:51,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 04:38:51,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:38:51,407 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 24 treesize of output 18 [2021-06-05 04:38:51,408 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:38:51,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:38:51,411 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:38:51,430 INFO L628 ElimStorePlain]: treesize reduction 19, result has 38.7 percent of original size [2021-06-05 04:38:51,430 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 04:38:51,430 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:38:51,431 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:65, output treesize:12 [2021-06-05 04:38:51,460 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:38:51,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2095848256] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:38:51,460 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:38:51,460 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 04:38:51,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535422994] [2021-06-05 04:38:51,461 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:38:51,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:38:51,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:38:51,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:38:51,461 INFO L87 Difference]: Start difference. First operand 103 states and 208 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:38:51,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:38:51,583 INFO L93 Difference]: Finished difference Result 123 states and 243 transitions. [2021-06-05 04:38:51,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:38:51,583 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 04:38:51,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:38:51,584 INFO L225 Difference]: With dead ends: 123 [2021-06-05 04:38:51,584 INFO L226 Difference]: Without dead ends: 123 [2021-06-05 04:38:51,584 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 158.0ms TimeCoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:38:51,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-06-05 04:38:51,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 96. [2021-06-05 04:38:51,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 2.0) internal successors, (190), 95 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:38:51,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 190 transitions. [2021-06-05 04:38:51,585 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 190 transitions. Word has length 19 [2021-06-05 04:38:51,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:38:51,585 INFO L482 AbstractCegarLoop]: Abstraction has 96 states and 190 transitions. [2021-06-05 04:38:51,585 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 04:38:51,585 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 190 transitions. [2021-06-05 04:38:51,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:38:51,585 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:38:51,585 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:38:51,785 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 561 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3011 [2021-06-05 04:38:51,786 INFO L430 AbstractCegarLoop]: === Iteration 567 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:38:51,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:38:51,786 INFO L82 PathProgramCache]: Analyzing trace with hash 926464630, now seen corresponding path program 561 times [2021-06-05 04:38:51,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:38:51,786 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292236160] [2021-06-05 04:38:51,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:38:51,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:38:51,993 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:38:51,993 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:38:51,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292236160] [2021-06-05 04:38:51,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292236160] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:38:51,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24154741] [2021-06-05 04:38:51,993 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 562 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 562 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:38:52,019 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:38:52,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:38:52,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 04:38:52,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:38:52,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 30 [2021-06-05 04:38:52,161 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:38:52,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-06-05 04:38:52,163 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:38:52,174 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:38:52,174 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 04:38:52,175 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:38:52,175 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:76, output treesize:37 [2021-06-05 04:38:52,246 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 04:38:52,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [24154741] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:38:52,246 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:38:52,246 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2021-06-05 04:38:52,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657636311] [2021-06-05 04:38:52,247 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:38:52,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:38:52,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:38:52,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:38:52,247 INFO L87 Difference]: Start difference. First operand 96 states and 190 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:38:52,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:38:52,628 INFO L93 Difference]: Finished difference Result 174 states and 331 transitions. [2021-06-05 04:38:52,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:38:52,628 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 04:38:52,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:38:52,629 INFO L225 Difference]: With dead ends: 174 [2021-06-05 04:38:52,629 INFO L226 Difference]: Without dead ends: 167 [2021-06-05 04:38:52,629 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 547.0ms TimeCoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:38:52,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-06-05 04:38:52,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 106. [2021-06-05 04:38:52,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 1.9904761904761905) internal successors, (209), 105 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:38:52,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 209 transitions. [2021-06-05 04:38:52,630 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 209 transitions. Word has length 20 [2021-06-05 04:38:52,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:38:52,630 INFO L482 AbstractCegarLoop]: Abstraction has 106 states and 209 transitions. [2021-06-05 04:38:52,630 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 04:38:52,630 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 209 transitions. [2021-06-05 04:38:52,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:38:52,630 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:38:52,630 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:38:52,830 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3013,562 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:38:52,831 INFO L430 AbstractCegarLoop]: === Iteration 568 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:38:52,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:38:52,831 INFO L82 PathProgramCache]: Analyzing trace with hash 1503642474, now seen corresponding path program 562 times [2021-06-05 04:38:52,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:38:52,831 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698390275] [2021-06-05 04:38:52,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:38:52,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:38:53,019 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 04:38:53,019 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:38:53,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698390275] [2021-06-05 04:38:53,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698390275] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:38:53,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085087924] [2021-06-05 04:38:53,019 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 563 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 563 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:38:53,048 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:38:53,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:38:53,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:38:53,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:38:53,254 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:38:53,254 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:38:53,255 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 27 treesize of output 21 [2021-06-05 04:38:53,255 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:38:53,257 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:38:53,258 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 27 treesize of output 21 [2021-06-05 04:38:53,258 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:38:53,280 INFO L628 ElimStorePlain]: treesize reduction 34, result has 47.7 percent of original size [2021-06-05 04:38:53,282 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:38:53,282 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 21 treesize of output 13 [2021-06-05 04:38:53,282 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:38:53,289 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:38:53,290 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 04:38:53,290 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:83, output treesize:14 [2021-06-05 04:38:53,338 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 04:38:53,338 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2085087924] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:38:53,338 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:38:53,338 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 22 [2021-06-05 04:38:53,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328504610] [2021-06-05 04:38:53,338 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 04:38:53,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:38:53,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 04:38:53,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:38:53,339 INFO L87 Difference]: Start difference. First operand 106 states and 209 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:38:53,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:38:53,679 INFO L93 Difference]: Finished difference Result 178 states and 336 transitions. [2021-06-05 04:38:53,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:38:53,679 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 04:38:53,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:38:53,679 INFO L225 Difference]: With dead ends: 178 [2021-06-05 04:38:53,680 INFO L226 Difference]: Without dead ends: 156 [2021-06-05 04:38:53,680 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 501.1ms TimeCoverageRelationStatistics Valid=87, Invalid=615, Unknown=0, NotChecked=0, Total=702 [2021-06-05 04:38:53,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-06-05 04:38:53,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 107. [2021-06-05 04:38:53,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 1.990566037735849) internal successors, (211), 106 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:38:53,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 211 transitions. [2021-06-05 04:38:53,681 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 211 transitions. Word has length 20 [2021-06-05 04:38:53,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:38:53,681 INFO L482 AbstractCegarLoop]: Abstraction has 107 states and 211 transitions. [2021-06-05 04:38:53,681 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 04:38:53,681 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 211 transitions. [2021-06-05 04:38:53,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:38:53,681 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:38:53,681 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:38:53,881 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 563 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3022 [2021-06-05 04:38:53,882 INFO L430 AbstractCegarLoop]: === Iteration 569 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:38:53,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:38:53,882 INFO L82 PathProgramCache]: Analyzing trace with hash 961820850, now seen corresponding path program 563 times [2021-06-05 04:38:53,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:38:53,882 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130362749] [2021-06-05 04:38:53,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:38:53,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:38:54,080 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:38:54,080 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:38:54,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130362749] [2021-06-05 04:38:54,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130362749] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:38:54,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52628248] [2021-06-05 04:38:54,081 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 564 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 564 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:38:54,106 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:38:54,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:38:54,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:38:54,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:38:54,331 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:38:54,331 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:38:54,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 04:38:54,336 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:38:54,338 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:38:54,338 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 27 treesize of output 21 [2021-06-05 04:38:54,339 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:38:54,361 INFO L628 ElimStorePlain]: treesize reduction 34, result has 42.4 percent of original size [2021-06-05 04:38:54,362 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:38:54,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:38:54,363 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:38:54,370 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:38:54,371 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:38:54,371 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:83, output treesize:14 [2021-06-05 04:38:54,411 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:38:54,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [52628248] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:38:54,412 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:38:54,412 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 21 [2021-06-05 04:38:54,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386781559] [2021-06-05 04:38:54,412 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 04:38:54,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:38:54,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 04:38:54,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:38:54,412 INFO L87 Difference]: Start difference. First operand 107 states and 211 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:38:54,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:38:54,705 INFO L93 Difference]: Finished difference Result 179 states and 338 transitions. [2021-06-05 04:38:54,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:38:54,706 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 04:38:54,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:38:54,706 INFO L225 Difference]: With dead ends: 179 [2021-06-05 04:38:54,706 INFO L226 Difference]: Without dead ends: 160 [2021-06-05 04:38:54,706 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 494.7ms TimeCoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:38:54,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-06-05 04:38:54,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 108. [2021-06-05 04:38:54,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 1.9906542056074767) internal successors, (213), 107 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:38:54,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 213 transitions. [2021-06-05 04:38:54,707 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 213 transitions. Word has length 20 [2021-06-05 04:38:54,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:38:54,708 INFO L482 AbstractCegarLoop]: Abstraction has 108 states and 213 transitions. [2021-06-05 04:38:54,708 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 04:38:54,708 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 213 transitions. [2021-06-05 04:38:54,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:38:54,708 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:38:54,708 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:38:54,912 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 564 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3025 [2021-06-05 04:38:54,913 INFO L430 AbstractCegarLoop]: === Iteration 570 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:38:54,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:38:54,913 INFO L82 PathProgramCache]: Analyzing trace with hash 1914174058, now seen corresponding path program 564 times [2021-06-05 04:38:54,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:38:54,913 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655368188] [2021-06-05 04:38:54,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:38:54,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:38:55,102 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 04:38:55,102 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:38:55,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655368188] [2021-06-05 04:38:55,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655368188] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:38:55,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720425636] [2021-06-05 04:38:55,102 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 04:38:55,128 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:38:55,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:38:55,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 04:38:55,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:38:55,377 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:38:55,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 04:38:55,378 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:38:55,384 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:38:55,385 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:38:55,386 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 10 treesize of output 6 [2021-06-05 04:38:55,387 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:38:55,392 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:38:55,393 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 04:38:55,393 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:36, output treesize:13 [2021-06-05 04:38:55,436 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:38:55,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [720425636] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:38:55,437 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:38:55,437 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 22 [2021-06-05 04:38:55,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845800514] [2021-06-05 04:38:55,437 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 04:38:55,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:38:55,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 04:38:55,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=405, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:38:55,437 INFO L87 Difference]: Start difference. First operand 108 states and 213 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:38:55,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:38:55,734 INFO L93 Difference]: Finished difference Result 180 states and 343 transitions. [2021-06-05 04:38:55,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:38:55,735 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 04:38:55,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:38:55,735 INFO L225 Difference]: With dead ends: 180 [2021-06-05 04:38:55,735 INFO L226 Difference]: Without dead ends: 173 [2021-06-05 04:38:55,735 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 482.1ms TimeCoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:38:55,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-06-05 04:38:55,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 109. [2021-06-05 04:38:55,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 2.0) internal successors, (216), 108 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:38:55,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 216 transitions. [2021-06-05 04:38:55,736 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 216 transitions. Word has length 20 [2021-06-05 04:38:55,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:38:55,736 INFO L482 AbstractCegarLoop]: Abstraction has 109 states and 216 transitions. [2021-06-05 04:38:55,736 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 04:38:55,736 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 216 transitions. [2021-06-05 04:38:55,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:38:55,737 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:38:55,737 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:38:55,937 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3028,565 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:38:55,937 INFO L430 AbstractCegarLoop]: === Iteration 571 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:38:55,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:38:55,937 INFO L82 PathProgramCache]: Analyzing trace with hash -1518788174, now seen corresponding path program 565 times [2021-06-05 04:38:55,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:38:55,937 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820413058] [2021-06-05 04:38:55,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:38:55,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:38:56,123 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:38:56,123 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:38:56,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820413058] [2021-06-05 04:38:56,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820413058] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:38:56,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581013848] [2021-06-05 04:38:56,124 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 566 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 566 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:38:56,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:38:56,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:38:56,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:38:56,415 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:38:56,416 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:38:56,416 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 27 treesize of output 21 [2021-06-05 04:38:56,417 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:38:56,419 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:38:56,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 04:38:56,420 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:38:56,441 INFO L628 ElimStorePlain]: treesize reduction 40, result has 38.5 percent of original size [2021-06-05 04:38:56,442 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:38:56,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:38:56,444 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:38:56,450 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:38:56,451 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 04:38:56,451 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:83, output treesize:14 [2021-06-05 04:38:56,490 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 04:38:56,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [581013848] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:38:56,491 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:38:56,491 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 21 [2021-06-05 04:38:56,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827727967] [2021-06-05 04:38:56,491 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 04:38:56,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:38:56,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 04:38:56,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:38:56,491 INFO L87 Difference]: Start difference. First operand 109 states and 216 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:38:56,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:38:56,896 INFO L93 Difference]: Finished difference Result 200 states and 380 transitions. [2021-06-05 04:38:56,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:38:56,896 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 04:38:56,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:38:56,896 INFO L225 Difference]: With dead ends: 200 [2021-06-05 04:38:56,896 INFO L226 Difference]: Without dead ends: 178 [2021-06-05 04:38:56,896 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 544.8ms TimeCoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:38:56,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-06-05 04:38:56,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 111. [2021-06-05 04:38:56,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.0090909090909093) internal successors, (221), 110 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:38:56,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 221 transitions. [2021-06-05 04:38:56,898 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 221 transitions. Word has length 20 [2021-06-05 04:38:56,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:38:56,898 INFO L482 AbstractCegarLoop]: Abstraction has 111 states and 221 transitions. [2021-06-05 04:38:56,898 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 04:38:56,898 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 221 transitions. [2021-06-05 04:38:56,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:38:56,898 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:38:56,898 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:38:57,098 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 566 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3032 [2021-06-05 04:38:57,098 INFO L430 AbstractCegarLoop]: === Iteration 572 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:38:57,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:38:57,099 INFO L82 PathProgramCache]: Analyzing trace with hash 1079331238, now seen corresponding path program 566 times [2021-06-05 04:38:57,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:38:57,099 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228334515] [2021-06-05 04:38:57,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:38:57,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:38:57,287 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 04:38:57,287 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:38:57,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228334515] [2021-06-05 04:38:57,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228334515] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:38:57,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1137050183] [2021-06-05 04:38:57,287 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 567 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 567 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:38:57,313 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:38:57,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:38:57,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:38:57,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:38:57,487 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:38:57,487 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:38:57,487 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 27 treesize of output 21 [2021-06-05 04:38:57,488 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:38:57,490 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:38:57,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 04:38:57,491 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:38:57,512 INFO L628 ElimStorePlain]: treesize reduction 40, result has 38.5 percent of original size [2021-06-05 04:38:57,514 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:38:57,514 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 10 treesize of output 6 [2021-06-05 04:38:57,515 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:38:57,522 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:38:57,523 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:38:57,523 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:83, output treesize:14 [2021-06-05 04:38:57,565 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:38:57,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1137050183] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:38:57,565 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:38:57,565 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 22 [2021-06-05 04:38:57,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193312553] [2021-06-05 04:38:57,565 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 04:38:57,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:38:57,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 04:38:57,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:38:57,566 INFO L87 Difference]: Start difference. First operand 111 states and 221 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:38:57,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:38:57,758 INFO L93 Difference]: Finished difference Result 153 states and 291 transitions. [2021-06-05 04:38:57,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:38:57,759 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 04:38:57,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:38:57,759 INFO L225 Difference]: With dead ends: 153 [2021-06-05 04:38:57,759 INFO L226 Difference]: Without dead ends: 131 [2021-06-05 04:38:57,759 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 361.0ms TimeCoverageRelationStatistics Valid=59, Invalid=447, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:38:57,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-06-05 04:38:57,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 113. [2021-06-05 04:38:57,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.0089285714285716) internal successors, (225), 112 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:38:57,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 225 transitions. [2021-06-05 04:38:57,760 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 225 transitions. Word has length 20 [2021-06-05 04:38:57,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:38:57,760 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 225 transitions. [2021-06-05 04:38:57,760 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 04:38:57,760 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 225 transitions. [2021-06-05 04:38:57,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:38:57,760 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:38:57,760 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:38:57,961 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3036,567 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:38:57,961 INFO L430 AbstractCegarLoop]: === Iteration 573 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:38:57,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:38:57,961 INFO L82 PathProgramCache]: Analyzing trace with hash 537509614, now seen corresponding path program 567 times [2021-06-05 04:38:57,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:38:57,961 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77433053] [2021-06-05 04:38:57,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:38:57,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:38:58,154 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 04:38:58,154 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:38:58,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77433053] [2021-06-05 04:38:58,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77433053] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:38:58,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876283003] [2021-06-05 04:38:58,154 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 568 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 568 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:38:58,179 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:38:58,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:38:58,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:38:58,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:38:58,381 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:38:58,382 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:38:58,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 04:38:58,383 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:38:58,385 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:38:58,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 04:38:58,386 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:38:58,406 INFO L628 ElimStorePlain]: treesize reduction 34, result has 47.7 percent of original size [2021-06-05 04:38:58,408 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:38:58,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 04:38:58,409 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:38:58,420 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:38:58,421 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:38:58,421 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:83, output treesize:14 [2021-06-05 04:38:58,460 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:38:58,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [876283003] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:38:58,461 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:38:58,461 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 21 [2021-06-05 04:38:58,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483125598] [2021-06-05 04:38:58,461 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 04:38:58,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:38:58,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 04:38:58,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=372, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:38:58,461 INFO L87 Difference]: Start difference. First operand 113 states and 225 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:38:58,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:38:58,730 INFO L93 Difference]: Finished difference Result 151 states and 288 transitions. [2021-06-05 04:38:58,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:38:58,730 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 04:38:58,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:38:58,730 INFO L225 Difference]: With dead ends: 151 [2021-06-05 04:38:58,730 INFO L226 Difference]: Without dead ends: 132 [2021-06-05 04:38:58,730 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 380.1ms TimeCoverageRelationStatistics Valid=54, Invalid=408, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:38:58,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-06-05 04:38:58,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 114. [2021-06-05 04:38:58,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 2.0088495575221237) internal successors, (227), 113 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:38:58,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 227 transitions. [2021-06-05 04:38:58,731 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 227 transitions. Word has length 20 [2021-06-05 04:38:58,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:38:58,731 INFO L482 AbstractCegarLoop]: Abstraction has 114 states and 227 transitions. [2021-06-05 04:38:58,731 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 04:38:58,731 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 227 transitions. [2021-06-05 04:38:58,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:38:58,732 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:38:58,732 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:38:58,932 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3039,568 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:38:58,932 INFO L430 AbstractCegarLoop]: === Iteration 574 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:38:58,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:38:58,932 INFO L82 PathProgramCache]: Analyzing trace with hash 1489862822, now seen corresponding path program 568 times [2021-06-05 04:38:58,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:38:58,932 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588349005] [2021-06-05 04:38:58,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:38:58,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:38:59,107 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:38:59,108 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:38:59,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588349005] [2021-06-05 04:38:59,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588349005] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:38:59,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437963419] [2021-06-05 04:38:59,108 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 569 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 569 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:38:59,133 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:38:59,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:38:59,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:38:59,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:38:59,351 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:38:59,351 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:38:59,352 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 19 treesize of output 15 [2021-06-05 04:38:59,352 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:38:59,354 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:38:59,354 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 19 treesize of output 15 [2021-06-05 04:38:59,355 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:38:59,375 INFO L628 ElimStorePlain]: treesize reduction 37, result has 40.3 percent of original size [2021-06-05 04:38:59,376 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:38:59,377 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 10 treesize of output 6 [2021-06-05 04:38:59,378 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:38:59,384 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:38:59,385 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 04:38:59,385 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:75, output treesize:14 [2021-06-05 04:38:59,427 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 04:38:59,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1437963419] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:38:59,427 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:38:59,427 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 22 [2021-06-05 04:38:59,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717709439] [2021-06-05 04:38:59,427 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 04:38:59,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:38:59,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 04:38:59,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:38:59,428 INFO L87 Difference]: Start difference. First operand 114 states and 227 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:38:59,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:38:59,723 INFO L93 Difference]: Finished difference Result 149 states and 285 transitions. [2021-06-05 04:38:59,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:38:59,724 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 04:38:59,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:38:59,724 INFO L225 Difference]: With dead ends: 149 [2021-06-05 04:38:59,724 INFO L226 Difference]: Without dead ends: 133 [2021-06-05 04:38:59,724 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 382.5ms TimeCoverageRelationStatistics Valid=58, Invalid=448, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:38:59,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-06-05 04:38:59,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 115. [2021-06-05 04:38:59,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 2.008771929824561) internal successors, (229), 114 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:38:59,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 229 transitions. [2021-06-05 04:38:59,725 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 229 transitions. Word has length 20 [2021-06-05 04:38:59,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:38:59,725 INFO L482 AbstractCegarLoop]: Abstraction has 115 states and 229 transitions. [2021-06-05 04:38:59,725 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 04:38:59,725 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 229 transitions. [2021-06-05 04:38:59,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:38:59,725 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:38:59,726 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:38:59,926 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 569 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3043 [2021-06-05 04:38:59,926 INFO L430 AbstractCegarLoop]: === Iteration 575 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:38:59,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:38:59,926 INFO L82 PathProgramCache]: Analyzing trace with hash -1943099410, now seen corresponding path program 569 times [2021-06-05 04:38:59,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:38:59,926 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028520435] [2021-06-05 04:38:59,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:38:59,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:39:00,110 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 04:39:00,110 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:39:00,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028520435] [2021-06-05 04:39:00,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028520435] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:39:00,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817885575] [2021-06-05 04:39:00,110 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 570 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 570 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:39:00,136 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:39:00,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:39:00,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:39:00,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:39:00,378 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:00,378 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:00,378 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 27 treesize of output 21 [2021-06-05 04:39:00,379 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:00,381 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:00,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 04:39:00,382 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:00,404 INFO L628 ElimStorePlain]: treesize reduction 46, result has 35.2 percent of original size [2021-06-05 04:39:00,406 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:00,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:39:00,407 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:39:00,414 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:39:00,414 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 04:39:00,414 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:83, output treesize:14 [2021-06-05 04:39:00,458 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:39:00,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [817885575] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:39:00,458 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:39:00,458 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 22 [2021-06-05 04:39:00,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481006669] [2021-06-05 04:39:00,458 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 04:39:00,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:39:00,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 04:39:00,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:39:00,459 INFO L87 Difference]: Start difference. First operand 115 states and 229 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:39:00,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:39:00,778 INFO L93 Difference]: Finished difference Result 150 states and 291 transitions. [2021-06-05 04:39:00,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:39:00,778 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 04:39:00,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:39:00,779 INFO L225 Difference]: With dead ends: 150 [2021-06-05 04:39:00,779 INFO L226 Difference]: Without dead ends: 137 [2021-06-05 04:39:00,779 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 439.3ms TimeCoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:39:00,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-06-05 04:39:00,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 116. [2021-06-05 04:39:00,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 2.008695652173913) internal successors, (231), 115 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:39:00,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 231 transitions. [2021-06-05 04:39:00,780 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 231 transitions. Word has length 20 [2021-06-05 04:39:00,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:39:00,780 INFO L482 AbstractCegarLoop]: Abstraction has 116 states and 231 transitions. [2021-06-05 04:39:00,780 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 04:39:00,780 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 231 transitions. [2021-06-05 04:39:00,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:39:00,780 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:39:00,780 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:39:00,980 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3046,570 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:39:00,981 INFO L430 AbstractCegarLoop]: === Iteration 576 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:39:00,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:39:00,981 INFO L82 PathProgramCache]: Analyzing trace with hash -806914138, now seen corresponding path program 570 times [2021-06-05 04:39:00,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:39:00,981 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993481727] [2021-06-05 04:39:00,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:39:00,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:39:01,216 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:39:01,216 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:39:01,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993481727] [2021-06-05 04:39:01,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993481727] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:39:01,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508022128] [2021-06-05 04:39:01,216 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 571 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 571 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:39:01,242 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:39:01,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:39:01,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:39:01,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:39:01,458 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:01,458 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:01,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:39:01,459 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:01,462 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:01,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:39:01,463 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:01,524 INFO L628 ElimStorePlain]: treesize reduction 85, result has 45.9 percent of original size [2021-06-05 04:39:01,526 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:01,527 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 10 treesize of output 6 [2021-06-05 04:39:01,528 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:39:01,551 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:39:01,554 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:01,554 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 19 treesize of output 15 [2021-06-05 04:39:01,555 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:01,576 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:39:01,579 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:01,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 04:39:01,580 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:39:01,601 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:39:01,602 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 04:39:01,602 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-06-05 04:39:01,688 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:39:01,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1508022128] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:39:01,688 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:39:01,688 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 22 [2021-06-05 04:39:01,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242222973] [2021-06-05 04:39:01,689 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 04:39:01,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:39:01,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 04:39:01,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:39:01,689 INFO L87 Difference]: Start difference. First operand 116 states and 231 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:39:02,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:39:02,159 INFO L93 Difference]: Finished difference Result 169 states and 318 transitions. [2021-06-05 04:39:02,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:39:02,160 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 04:39:02,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:39:02,160 INFO L225 Difference]: With dead ends: 169 [2021-06-05 04:39:02,160 INFO L226 Difference]: Without dead ends: 150 [2021-06-05 04:39:02,160 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 583.2ms TimeCoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:39:02,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-06-05 04:39:02,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 118. [2021-06-05 04:39:02,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 2.0256410256410255) internal successors, (237), 117 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:39:02,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 237 transitions. [2021-06-05 04:39:02,161 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 237 transitions. Word has length 20 [2021-06-05 04:39:02,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:39:02,161 INFO L482 AbstractCegarLoop]: Abstraction has 118 states and 237 transitions. [2021-06-05 04:39:02,161 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 04:39:02,161 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 237 transitions. [2021-06-05 04:39:02,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:39:02,162 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:39:02,162 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:39:02,362 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 571 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3050 [2021-06-05 04:39:02,362 INFO L430 AbstractCegarLoop]: === Iteration 577 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:39:02,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:39:02,362 INFO L82 PathProgramCache]: Analyzing trace with hash -1152433290, now seen corresponding path program 571 times [2021-06-05 04:39:02,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:39:02,362 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264007524] [2021-06-05 04:39:02,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:39:02,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:39:02,531 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 04:39:02,531 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:39:02,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264007524] [2021-06-05 04:39:02,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264007524] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:39:02,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1860535684] [2021-06-05 04:39:02,531 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 572 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 572 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:39:02,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:39:02,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:39:02,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:39:02,731 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:02,731 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:02,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 04:39:02,732 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:02,734 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:02,735 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 27 treesize of output 21 [2021-06-05 04:39:02,735 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:02,756 INFO L628 ElimStorePlain]: treesize reduction 40, result has 38.5 percent of original size [2021-06-05 04:39:02,758 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:02,758 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 10 treesize of output 6 [2021-06-05 04:39:02,759 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:39:02,766 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:39:02,767 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 04:39:02,767 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:83, output treesize:14 [2021-06-05 04:39:02,809 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:39:02,809 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1860535684] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:39:02,809 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:39:02,809 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 22 [2021-06-05 04:39:02,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695933441] [2021-06-05 04:39:02,809 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 04:39:02,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:39:02,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 04:39:02,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:39:02,810 INFO L87 Difference]: Start difference. First operand 118 states and 237 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:39:03,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:39:03,066 INFO L93 Difference]: Finished difference Result 159 states and 306 transitions. [2021-06-05 04:39:03,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:39:03,066 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 04:39:03,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:39:03,066 INFO L225 Difference]: With dead ends: 159 [2021-06-05 04:39:03,066 INFO L226 Difference]: Without dead ends: 140 [2021-06-05 04:39:03,067 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 382.3ms TimeCoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:39:03,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-06-05 04:39:03,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 122. [2021-06-05 04:39:03,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 2.024793388429752) internal successors, (245), 121 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:39:03,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 245 transitions. [2021-06-05 04:39:03,068 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 245 transitions. Word has length 20 [2021-06-05 04:39:03,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:39:03,068 INFO L482 AbstractCegarLoop]: Abstraction has 122 states and 245 transitions. [2021-06-05 04:39:03,068 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 04:39:03,068 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 245 transitions. [2021-06-05 04:39:03,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:39:03,068 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:39:03,068 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:39:03,268 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 572 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3055 [2021-06-05 04:39:03,268 INFO L430 AbstractCegarLoop]: === Iteration 578 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:39:03,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:39:03,269 INFO L82 PathProgramCache]: Analyzing trace with hash -200080082, now seen corresponding path program 572 times [2021-06-05 04:39:03,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:39:03,269 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202365832] [2021-06-05 04:39:03,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:39:03,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:39:03,433 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 04:39:03,433 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:39:03,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202365832] [2021-06-05 04:39:03,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202365832] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:39:03,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121147447] [2021-06-05 04:39:03,433 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 573 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 573 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:39:03,458 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:39:03,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:39:03,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:39:03,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:39:03,651 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:03,652 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:03,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:39:03,652 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:03,654 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:03,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:39:03,655 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:03,676 INFO L628 ElimStorePlain]: treesize reduction 34, result has 42.4 percent of original size [2021-06-05 04:39:03,677 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:03,678 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 10 treesize of output 6 [2021-06-05 04:39:03,679 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:39:03,685 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:39:03,686 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:39:03,686 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:75, output treesize:14 [2021-06-05 04:39:03,725 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:39:03,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [121147447] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:39:03,725 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:39:03,725 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 21 [2021-06-05 04:39:03,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994965886] [2021-06-05 04:39:03,725 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 04:39:03,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:39:03,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 04:39:03,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:39:03,726 INFO L87 Difference]: Start difference. First operand 122 states and 245 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:39:04,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:39:04,063 INFO L93 Difference]: Finished difference Result 158 states and 305 transitions. [2021-06-05 04:39:04,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:39:04,064 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 04:39:04,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:39:04,064 INFO L225 Difference]: With dead ends: 158 [2021-06-05 04:39:04,064 INFO L226 Difference]: Without dead ends: 142 [2021-06-05 04:39:04,064 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 416.8ms TimeCoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:39:04,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-06-05 04:39:04,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 123. [2021-06-05 04:39:04,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 122 states have (on average 2.0245901639344264) internal successors, (247), 122 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:39:04,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 247 transitions. [2021-06-05 04:39:04,065 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 247 transitions. Word has length 20 [2021-06-05 04:39:04,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:39:04,065 INFO L482 AbstractCegarLoop]: Abstraction has 123 states and 247 transitions. [2021-06-05 04:39:04,065 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 04:39:04,065 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 247 transitions. [2021-06-05 04:39:04,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:39:04,065 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:39:04,065 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:39:04,266 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3059,573 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:39:04,266 INFO L430 AbstractCegarLoop]: === Iteration 579 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:39:04,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:39:04,266 INFO L82 PathProgramCache]: Analyzing trace with hash 661924982, now seen corresponding path program 573 times [2021-06-05 04:39:04,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:39:04,266 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751445876] [2021-06-05 04:39:04,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:39:04,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:39:04,490 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 04:39:04,490 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:39:04,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751445876] [2021-06-05 04:39:04,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751445876] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:39:04,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606053257] [2021-06-05 04:39:04,490 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 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 04:39:04,516 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:39:04,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:39:04,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:39:04,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:39:04,731 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:04,731 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:04,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:39:04,732 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:04,734 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:04,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:39:04,735 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:04,757 INFO L628 ElimStorePlain]: treesize reduction 37, result has 43.1 percent of original size [2021-06-05 04:39:04,758 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:04,759 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 13 treesize of output 9 [2021-06-05 04:39:04,760 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:39:04,766 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:39:04,767 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 04:39:04,767 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:75, output treesize:14 [2021-06-05 04:39:04,810 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:39:04,810 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1606053257] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:39:04,810 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:39:04,810 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 22 [2021-06-05 04:39:04,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522773505] [2021-06-05 04:39:04,811 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 04:39:04,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:39:04,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 04:39:04,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:39:04,811 INFO L87 Difference]: Start difference. First operand 123 states and 247 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:39:05,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:39:05,327 INFO L93 Difference]: Finished difference Result 160 states and 313 transitions. [2021-06-05 04:39:05,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:39:05,327 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 04:39:05,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:39:05,327 INFO L225 Difference]: With dead ends: 160 [2021-06-05 04:39:05,327 INFO L226 Difference]: Without dead ends: 147 [2021-06-05 04:39:05,327 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 583.4ms TimeCoverageRelationStatistics Valid=84, Invalid=672, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:39:05,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-06-05 04:39:05,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 124. [2021-06-05 04:39:05,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 2.024390243902439) internal successors, (249), 123 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:39:05,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 249 transitions. [2021-06-05 04:39:05,329 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 249 transitions. Word has length 20 [2021-06-05 04:39:05,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:39:05,329 INFO L482 AbstractCegarLoop]: Abstraction has 124 states and 249 transitions. [2021-06-05 04:39:05,329 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 04:39:05,329 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 249 transitions. [2021-06-05 04:39:05,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:39:05,329 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:39:05,329 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:39:05,529 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 574 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3063 [2021-06-05 04:39:05,529 INFO L430 AbstractCegarLoop]: === Iteration 580 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:39:05,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:39:05,530 INFO L82 PathProgramCache]: Analyzing trace with hash 1798110254, now seen corresponding path program 574 times [2021-06-05 04:39:05,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:39:05,530 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473136138] [2021-06-05 04:39:05,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:39:05,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:39:05,717 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 04:39:05,718 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:39:05,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473136138] [2021-06-05 04:39:05,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473136138] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:39:05,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89478702] [2021-06-05 04:39:05,718 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 575 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 575 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:39:05,743 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:39:05,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:39:05,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:39:05,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:39:05,919 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:05,919 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:05,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:39:05,920 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:05,923 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:05,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:39:05,924 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:05,985 INFO L628 ElimStorePlain]: treesize reduction 88, result has 46.0 percent of original size [2021-06-05 04:39:05,988 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:05,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 04:39:05,989 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:39:06,012 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:39:06,014 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:06,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:39:06,015 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:06,037 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:39:06,039 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:06,040 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 13 treesize of output 9 [2021-06-05 04:39:06,041 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:39:06,061 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:39:06,063 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 04:39:06,063 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-06-05 04:39:06,145 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 04:39:06,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [89478702] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:39:06,146 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:39:06,146 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 22 [2021-06-05 04:39:06,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884008250] [2021-06-05 04:39:06,146 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 04:39:06,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:39:06,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 04:39:06,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:39:06,147 INFO L87 Difference]: Start difference. First operand 124 states and 249 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:39:06,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:39:06,646 INFO L93 Difference]: Finished difference Result 180 states and 342 transitions. [2021-06-05 04:39:06,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 04:39:06,646 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 04:39:06,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:39:06,646 INFO L225 Difference]: With dead ends: 180 [2021-06-05 04:39:06,646 INFO L226 Difference]: Without dead ends: 161 [2021-06-05 04:39:06,646 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 541.7ms TimeCoverageRelationStatistics Valid=94, Invalid=718, Unknown=0, NotChecked=0, Total=812 [2021-06-05 04:39:06,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-06-05 04:39:06,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 121. [2021-06-05 04:39:06,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 2.025) internal successors, (243), 120 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:39:06,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 243 transitions. [2021-06-05 04:39:06,647 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 243 transitions. Word has length 20 [2021-06-05 04:39:06,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:39:06,648 INFO L482 AbstractCegarLoop]: Abstraction has 121 states and 243 transitions. [2021-06-05 04:39:06,648 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 04:39:06,648 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 243 transitions. [2021-06-05 04:39:06,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:39:06,648 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:39:06,648 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:39:06,848 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 575 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3067 [2021-06-05 04:39:06,848 INFO L430 AbstractCegarLoop]: === Iteration 581 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:39:06,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:39:06,849 INFO L82 PathProgramCache]: Analyzing trace with hash -1085878362, now seen corresponding path program 575 times [2021-06-05 04:39:06,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:39:06,849 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272301112] [2021-06-05 04:39:06,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:39:06,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:39:07,008 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:39:07,009 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:39:07,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272301112] [2021-06-05 04:39:07,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272301112] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:39:07,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965621123] [2021-06-05 04:39:07,009 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 576 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 576 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:39:07,035 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:39:07,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:39:07,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:39:07,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:39:07,198 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:07,198 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:07,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:39:07,199 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:07,201 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:07,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:39:07,202 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:07,224 INFO L628 ElimStorePlain]: treesize reduction 37, result has 43.1 percent of original size [2021-06-05 04:39:07,225 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:07,225 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 13 treesize of output 9 [2021-06-05 04:39:07,227 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:39:07,233 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:39:07,234 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:39:07,234 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:75, output treesize:14 [2021-06-05 04:39:07,270 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 04:39:07,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [965621123] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:39:07,270 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:39:07,270 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 21 [2021-06-05 04:39:07,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453849067] [2021-06-05 04:39:07,271 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 04:39:07,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:39:07,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 04:39:07,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:39:07,271 INFO L87 Difference]: Start difference. First operand 121 states and 243 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:39:07,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:39:07,659 INFO L93 Difference]: Finished difference Result 163 states and 315 transitions. [2021-06-05 04:39:07,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:39:07,659 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 04:39:07,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:39:07,660 INFO L225 Difference]: With dead ends: 163 [2021-06-05 04:39:07,660 INFO L226 Difference]: Without dead ends: 147 [2021-06-05 04:39:07,660 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 423.8ms TimeCoverageRelationStatistics Valid=81, Invalid=621, Unknown=0, NotChecked=0, Total=702 [2021-06-05 04:39:07,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-06-05 04:39:07,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 128. [2021-06-05 04:39:07,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 127 states have (on average 2.0236220472440944) internal successors, (257), 127 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:39:07,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 257 transitions. [2021-06-05 04:39:07,661 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 257 transitions. Word has length 20 [2021-06-05 04:39:07,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:39:07,661 INFO L482 AbstractCegarLoop]: Abstraction has 128 states and 257 transitions. [2021-06-05 04:39:07,661 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 04:39:07,661 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 257 transitions. [2021-06-05 04:39:07,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:39:07,661 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:39:07,661 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:39:07,862 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 576 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3072 [2021-06-05 04:39:07,862 INFO L430 AbstractCegarLoop]: === Iteration 582 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:39:07,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:39:07,862 INFO L82 PathProgramCache]: Analyzing trace with hash -223873298, now seen corresponding path program 576 times [2021-06-05 04:39:07,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:39:07,862 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329624729] [2021-06-05 04:39:07,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:39:07,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:39:08,060 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:39:08,060 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:39:08,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329624729] [2021-06-05 04:39:08,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329624729] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:39:08,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757326640] [2021-06-05 04:39:08,060 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 577 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 577 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:39:08,087 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:39:08,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:39:08,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:39:08,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:39:08,278 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:08,278 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:08,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:39:08,279 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:08,281 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:08,281 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 19 treesize of output 15 [2021-06-05 04:39:08,282 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:08,303 INFO L628 ElimStorePlain]: treesize reduction 34, result has 45.2 percent of original size [2021-06-05 04:39:08,305 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:08,305 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 13 treesize of output 9 [2021-06-05 04:39:08,307 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:39:08,313 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:39:08,314 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 04:39:08,314 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:75, output treesize:14 [2021-06-05 04:39:08,357 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:39:08,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [757326640] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:39:08,357 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:39:08,357 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 22 [2021-06-05 04:39:08,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43026693] [2021-06-05 04:39:08,357 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 04:39:08,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:39:08,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 04:39:08,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=408, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:39:08,358 INFO L87 Difference]: Start difference. First operand 128 states and 257 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:39:08,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:39:08,911 INFO L93 Difference]: Finished difference Result 166 states and 325 transitions. [2021-06-05 04:39:08,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 04:39:08,911 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 04:39:08,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:39:08,911 INFO L225 Difference]: With dead ends: 166 [2021-06-05 04:39:08,911 INFO L226 Difference]: Without dead ends: 153 [2021-06-05 04:39:08,912 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 587.6ms TimeCoverageRelationStatistics Valid=101, Invalid=829, Unknown=0, NotChecked=0, Total=930 [2021-06-05 04:39:08,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-06-05 04:39:08,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 129. [2021-06-05 04:39:08,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 2.0234375) internal successors, (259), 128 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:39:08,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 259 transitions. [2021-06-05 04:39:08,913 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 259 transitions. Word has length 20 [2021-06-05 04:39:08,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:39:08,913 INFO L482 AbstractCegarLoop]: Abstraction has 129 states and 259 transitions. [2021-06-05 04:39:08,913 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 04:39:08,913 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 259 transitions. [2021-06-05 04:39:08,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:39:08,913 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:39:08,913 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:39:09,113 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 577 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3076 [2021-06-05 04:39:09,114 INFO L430 AbstractCegarLoop]: === Iteration 583 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:39:09,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:39:09,114 INFO L82 PathProgramCache]: Analyzing trace with hash 912311974, now seen corresponding path program 577 times [2021-06-05 04:39:09,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:39:09,114 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000600895] [2021-06-05 04:39:09,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:39:09,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:39:09,304 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 04:39:09,304 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:39:09,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000600895] [2021-06-05 04:39:09,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000600895] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:39:09,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525346147] [2021-06-05 04:39:09,304 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 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 04:39:09,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:39:09,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:39:09,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:39:09,487 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:09,488 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:09,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:39:09,489 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:09,492 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:09,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:39:09,492 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:09,555 INFO L628 ElimStorePlain]: treesize reduction 85, result has 45.9 percent of original size [2021-06-05 04:39:09,557 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:09,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:39:09,559 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:39:09,582 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:39:09,585 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:09,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:39:09,586 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:09,607 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:39:09,610 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:09,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 04:39:09,612 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:39:09,632 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:39:09,633 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 04:39:09,633 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-06-05 04:39:09,715 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 04:39:09,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1525346147] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:39:09,715 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:39:09,715 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 22 [2021-06-05 04:39:09,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866424725] [2021-06-05 04:39:09,715 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 04:39:09,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:39:09,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 04:39:09,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=406, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:39:09,716 INFO L87 Difference]: Start difference. First operand 129 states and 259 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:39:10,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:39:10,348 INFO L93 Difference]: Finished difference Result 187 states and 356 transitions. [2021-06-05 04:39:10,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 04:39:10,348 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 04:39:10,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:39:10,348 INFO L225 Difference]: With dead ends: 187 [2021-06-05 04:39:10,349 INFO L226 Difference]: Without dead ends: 168 [2021-06-05 04:39:10,349 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 619.1ms TimeCoverageRelationStatistics Valid=116, Invalid=940, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 04:39:10,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-06-05 04:39:10,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 127. [2021-06-05 04:39:10,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 126 states have (on average 2.0238095238095237) internal successors, (255), 126 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:39:10,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 255 transitions. [2021-06-05 04:39:10,350 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 255 transitions. Word has length 20 [2021-06-05 04:39:10,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:39:10,350 INFO L482 AbstractCegarLoop]: Abstraction has 127 states and 255 transitions. [2021-06-05 04:39:10,350 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 04:39:10,350 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 255 transitions. [2021-06-05 04:39:10,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:39:10,350 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:39:10,350 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:39:10,550 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 578 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3080 [2021-06-05 04:39:10,551 INFO L430 AbstractCegarLoop]: === Iteration 584 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:39:10,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:39:10,551 INFO L82 PathProgramCache]: Analyzing trace with hash 1964309878, now seen corresponding path program 578 times [2021-06-05 04:39:10,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:39:10,551 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076790454] [2021-06-05 04:39:10,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:39:10,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:39:10,747 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 04:39:10,747 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:39:10,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076790454] [2021-06-05 04:39:10,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076790454] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:39:10,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935804461] [2021-06-05 04:39:10,747 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 579 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 579 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:39:10,772 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:39:10,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:39:10,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:39:10,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:39:10,929 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:10,929 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:10,930 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 27 treesize of output 21 [2021-06-05 04:39:10,930 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:10,932 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:10,932 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 27 treesize of output 21 [2021-06-05 04:39:10,933 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:10,955 INFO L628 ElimStorePlain]: treesize reduction 40, result has 43.7 percent of original size [2021-06-05 04:39:10,957 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:10,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 04:39:10,957 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:10,964 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:39:10,965 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 04:39:10,965 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:83, output treesize:14 [2021-06-05 04:39:11,007 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 04:39:11,007 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1935804461] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:39:11,007 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:39:11,007 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 22 [2021-06-05 04:39:11,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608644051] [2021-06-05 04:39:11,007 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 04:39:11,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:39:11,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 04:39:11,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:39:11,007 INFO L87 Difference]: Start difference. First operand 127 states and 255 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:39:11,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:39:11,572 INFO L93 Difference]: Finished difference Result 171 states and 335 transitions. [2021-06-05 04:39:11,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 04:39:11,572 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 04:39:11,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:39:11,572 INFO L225 Difference]: With dead ends: 171 [2021-06-05 04:39:11,572 INFO L226 Difference]: Without dead ends: 158 [2021-06-05 04:39:11,572 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 587.7ms TimeCoverageRelationStatistics Valid=108, Invalid=948, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 04:39:11,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-06-05 04:39:11,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 135. [2021-06-05 04:39:11,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 2.0223880597014925) internal successors, (271), 134 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:39:11,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 271 transitions. [2021-06-05 04:39:11,573 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 271 transitions. Word has length 20 [2021-06-05 04:39:11,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:39:11,574 INFO L482 AbstractCegarLoop]: Abstraction has 135 states and 271 transitions. [2021-06-05 04:39:11,574 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 04:39:11,574 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 271 transitions. [2021-06-05 04:39:11,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:39:11,574 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:39:11,574 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:39:11,774 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 579 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3085 [2021-06-05 04:39:11,774 INFO L430 AbstractCegarLoop]: === Iteration 585 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:39:11,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:39:11,774 INFO L82 PathProgramCache]: Analyzing trace with hash -1194472146, now seen corresponding path program 579 times [2021-06-05 04:39:11,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:39:11,775 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294420417] [2021-06-05 04:39:11,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:39:11,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:39:11,981 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:39:11,982 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:39:11,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294420417] [2021-06-05 04:39:11,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294420417] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:39:11,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70533048] [2021-06-05 04:39:11,982 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 580 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 580 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:39:12,007 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:39:12,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:39:12,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:39:12,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:39:12,135 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:12,135 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:12,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:39:12,136 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:12,139 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:12,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:39:12,140 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:12,200 INFO L628 ElimStorePlain]: treesize reduction 85, result has 46.9 percent of original size [2021-06-05 04:39:12,202 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:12,203 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 13 treesize of output 9 [2021-06-05 04:39:12,204 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:39:12,227 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:39:12,230 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:12,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:39:12,231 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:12,252 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:39:12,255 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:12,255 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 13 treesize of output 9 [2021-06-05 04:39:12,256 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:39:12,277 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:39:12,278 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 04:39:12,278 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-06-05 04:39:12,360 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 04:39:12,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [70533048] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:39:12,360 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:39:12,360 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 22 [2021-06-05 04:39:12,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78812839] [2021-06-05 04:39:12,360 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 04:39:12,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:39:12,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 04:39:12,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=406, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:39:12,361 INFO L87 Difference]: Start difference. First operand 135 states and 271 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:39:13,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:39:13,153 INFO L93 Difference]: Finished difference Result 193 states and 368 transitions. [2021-06-05 04:39:13,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 04:39:13,153 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 04:39:13,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:39:13,153 INFO L225 Difference]: With dead ends: 193 [2021-06-05 04:39:13,153 INFO L226 Difference]: Without dead ends: 174 [2021-06-05 04:39:13,153 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 798.4ms TimeCoverageRelationStatistics Valid=137, Invalid=1195, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 04:39:13,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-06-05 04:39:13,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 134. [2021-06-05 04:39:13,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 2.0225563909774436) internal successors, (269), 133 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:39:13,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 269 transitions. [2021-06-05 04:39:13,155 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 269 transitions. Word has length 20 [2021-06-05 04:39:13,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:39:13,155 INFO L482 AbstractCegarLoop]: Abstraction has 134 states and 269 transitions. [2021-06-05 04:39:13,155 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 04:39:13,155 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 269 transitions. [2021-06-05 04:39:13,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:39:13,155 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:39:13,155 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:39:13,355 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 580 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3089 [2021-06-05 04:39:13,355 INFO L430 AbstractCegarLoop]: === Iteration 586 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:39:13,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:39:13,356 INFO L82 PathProgramCache]: Analyzing trace with hash 954324390, now seen corresponding path program 580 times [2021-06-05 04:39:13,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:39:13,356 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211316168] [2021-06-05 04:39:13,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:39:13,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:39:13,571 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:39:13,571 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:39:13,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211316168] [2021-06-05 04:39:13,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211316168] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:39:13,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749213742] [2021-06-05 04:39:13,571 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 581 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 581 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:39:13,596 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:39:13,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:39:13,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:39:13,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:39:13,701 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:13,702 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:13,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:39:13,702 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:13,705 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:13,705 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:13,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:39:13,706 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:13,709 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:13,709 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:13,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:39:13,710 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:13,713 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:13,713 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 19 treesize of output 15 [2021-06-05 04:39:13,713 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:13,767 INFO L628 ElimStorePlain]: treesize reduction 77, result has 46.5 percent of original size [2021-06-05 04:39:13,769 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:13,769 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:13,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 04:39:13,771 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:39:13,773 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:13,774 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 10 treesize of output 6 [2021-06-05 04:39:13,775 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:39:13,797 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:39:13,798 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 04:39:13,798 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:173, output treesize:38 [2021-06-05 04:39:13,879 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 04:39:13,879 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1749213742] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:39:13,879 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:39:13,879 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 22 [2021-06-05 04:39:13,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278736806] [2021-06-05 04:39:13,879 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 04:39:13,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:39:13,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 04:39:13,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=405, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:39:13,880 INFO L87 Difference]: Start difference. First operand 134 states and 269 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:39:14,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:39:14,746 INFO L93 Difference]: Finished difference Result 202 states and 391 transitions. [2021-06-05 04:39:14,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 04:39:14,747 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 04:39:14,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:39:14,747 INFO L225 Difference]: With dead ends: 202 [2021-06-05 04:39:14,747 INFO L226 Difference]: Without dead ends: 183 [2021-06-05 04:39:14,747 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 870.2ms TimeCoverageRelationStatistics Valid=139, Invalid=1267, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 04:39:14,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-06-05 04:39:14,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 136. [2021-06-05 04:39:14,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 2.0296296296296297) internal successors, (274), 135 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:39:14,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 274 transitions. [2021-06-05 04:39:14,748 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 274 transitions. Word has length 20 [2021-06-05 04:39:14,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:39:14,749 INFO L482 AbstractCegarLoop]: Abstraction has 136 states and 274 transitions. [2021-06-05 04:39:14,749 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 04:39:14,749 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 274 transitions. [2021-06-05 04:39:14,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:39:14,749 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:39:14,749 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:39:14,949 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3094,581 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:39:14,949 INFO L430 AbstractCegarLoop]: === Iteration 587 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:39:14,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:39:14,949 INFO L82 PathProgramCache]: Analyzing trace with hash 810584810, now seen corresponding path program 581 times [2021-06-05 04:39:14,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:39:14,950 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288380071] [2021-06-05 04:39:14,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:39:14,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:39:15,081 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:39:15,081 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:39:15,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288380071] [2021-06-05 04:39:15,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288380071] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:39:15,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649681900] [2021-06-05 04:39:15,081 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 582 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 582 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:39:15,107 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:39:15,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:39:15,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:39:15,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:39:15,296 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:15,296 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:15,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 04:39:15,297 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:15,299 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:15,300 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 27 treesize of output 21 [2021-06-05 04:39:15,301 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:15,323 INFO L628 ElimStorePlain]: treesize reduction 46, result has 35.2 percent of original size [2021-06-05 04:39:15,325 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:15,325 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 10 treesize of output 6 [2021-06-05 04:39:15,326 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:39:15,333 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:39:15,334 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 04:39:15,334 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:83, output treesize:14 [2021-06-05 04:39:15,373 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 04:39:15,373 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1649681900] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:39:15,373 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:39:15,373 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 22 [2021-06-05 04:39:15,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067108904] [2021-06-05 04:39:15,373 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 04:39:15,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:39:15,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 04:39:15,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:39:15,373 INFO L87 Difference]: Start difference. First operand 136 states and 274 transitions. Second operand has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:39:15,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:39:15,760 INFO L93 Difference]: Finished difference Result 170 states and 337 transitions. [2021-06-05 04:39:15,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:39:15,760 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:39:15,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:39:15,760 INFO L225 Difference]: With dead ends: 170 [2021-06-05 04:39:15,760 INFO L226 Difference]: Without dead ends: 148 [2021-06-05 04:39:15,760 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 360.6ms TimeCoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:39:15,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-06-05 04:39:15,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 137. [2021-06-05 04:39:15,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 2.0294117647058822) internal successors, (276), 136 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:39:15,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 276 transitions. [2021-06-05 04:39:15,761 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 276 transitions. Word has length 20 [2021-06-05 04:39:15,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:39:15,762 INFO L482 AbstractCegarLoop]: Abstraction has 137 states and 276 transitions. [2021-06-05 04:39:15,762 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:39:15,762 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 276 transitions. [2021-06-05 04:39:15,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:39:15,762 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:39:15,762 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:39:15,962 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 582 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3097 [2021-06-05 04:39:15,962 INFO L430 AbstractCegarLoop]: === Iteration 588 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:39:15,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:39:15,962 INFO L82 PathProgramCache]: Analyzing trace with hash 268763186, now seen corresponding path program 582 times [2021-06-05 04:39:15,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:39:15,963 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642161509] [2021-06-05 04:39:15,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:39:15,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:39:16,101 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 04:39:16,101 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:39:16,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642161509] [2021-06-05 04:39:16,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642161509] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:39:16,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469606507] [2021-06-05 04:39:16,101 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 583 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 583 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:39:16,127 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:39:16,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:39:16,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 04:39:16,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:39:16,335 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:16,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 04:39:16,336 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:16,342 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:39:16,343 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:16,343 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 10 treesize of output 6 [2021-06-05 04:39:16,345 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:39:16,350 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:39:16,351 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 04:39:16,351 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:36, output treesize:13 [2021-06-05 04:39:16,389 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:39:16,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [469606507] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:39:16,389 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:39:16,389 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 22 [2021-06-05 04:39:16,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977301292] [2021-06-05 04:39:16,389 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 04:39:16,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:39:16,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 04:39:16,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:39:16,389 INFO L87 Difference]: Start difference. First operand 137 states and 276 transitions. Second operand has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:39:16,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:39:16,712 INFO L93 Difference]: Finished difference Result 167 states and 334 transitions. [2021-06-05 04:39:16,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:39:16,713 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:39:16,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:39:16,713 INFO L225 Difference]: With dead ends: 167 [2021-06-05 04:39:16,713 INFO L226 Difference]: Without dead ends: 160 [2021-06-05 04:39:16,713 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 385.0ms TimeCoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:39:16,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-06-05 04:39:16,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 138. [2021-06-05 04:39:16,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 2.0364963503649633) internal successors, (279), 137 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:39:16,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 279 transitions. [2021-06-05 04:39:16,714 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 279 transitions. Word has length 20 [2021-06-05 04:39:16,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:39:16,714 INFO L482 AbstractCegarLoop]: Abstraction has 138 states and 279 transitions. [2021-06-05 04:39:16,714 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:39:16,715 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 279 transitions. [2021-06-05 04:39:16,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:39:16,715 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:39:16,715 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:39:16,915 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 583 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3100 [2021-06-05 04:39:16,915 INFO L430 AbstractCegarLoop]: === Iteration 589 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:39:16,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:39:16,915 INFO L82 PathProgramCache]: Analyzing trace with hash 1221116394, now seen corresponding path program 583 times [2021-06-05 04:39:16,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:39:16,915 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179000716] [2021-06-05 04:39:16,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:39:16,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:39:17,199 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:39:17,199 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:39:17,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179000716] [2021-06-05 04:39:17,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179000716] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:39:17,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87663340] [2021-06-05 04:39:17,199 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 04:39:17,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:39:17,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:39:17,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:39:17,465 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:17,466 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:17,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 04:39:17,467 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:17,469 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:17,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 04:39:17,470 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:17,491 INFO L628 ElimStorePlain]: treesize reduction 34, result has 47.7 percent of original size [2021-06-05 04:39:17,493 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:17,493 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 21 treesize of output 13 [2021-06-05 04:39:17,494 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:17,501 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:39:17,501 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 04:39:17,502 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:83, output treesize:14 [2021-06-05 04:39:17,545 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:39:17,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [87663340] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:39:17,545 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:39:17,545 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-06-05 04:39:17,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308704807] [2021-06-05 04:39:17,545 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 04:39:17,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:39:17,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 04:39:17,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=450, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:39:17,546 INFO L87 Difference]: Start difference. First operand 138 states and 279 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:39:17,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:39:17,850 INFO L93 Difference]: Finished difference Result 164 states and 320 transitions. [2021-06-05 04:39:17,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:39:17,850 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 04:39:17,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:39:17,850 INFO L225 Difference]: With dead ends: 164 [2021-06-05 04:39:17,850 INFO L226 Difference]: Without dead ends: 148 [2021-06-05 04:39:17,850 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 541.8ms TimeCoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:39:17,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-06-05 04:39:17,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 139. [2021-06-05 04:39:17,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 2.036231884057971) internal successors, (281), 138 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:39:17,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 281 transitions. [2021-06-05 04:39:17,852 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 281 transitions. Word has length 20 [2021-06-05 04:39:17,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:39:17,852 INFO L482 AbstractCegarLoop]: Abstraction has 139 states and 281 transitions. [2021-06-05 04:39:17,852 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 04:39:17,852 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 281 transitions. [2021-06-05 04:39:17,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:39:17,852 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:39:17,852 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:39:18,068 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3103,584 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:39:18,069 INFO L430 AbstractCegarLoop]: === Iteration 590 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:39:18,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:39:18,069 INFO L82 PathProgramCache]: Analyzing trace with hash 2083121458, now seen corresponding path program 584 times [2021-06-05 04:39:18,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:39:18,069 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34396511] [2021-06-05 04:39:18,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:39:18,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:39:18,252 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 04:39:18,252 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:39:18,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34396511] [2021-06-05 04:39:18,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34396511] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:39:18,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660663743] [2021-06-05 04:39:18,253 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 04:39:18,278 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:39:18,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:39:18,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:39:18,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:39:18,532 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:18,532 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:18,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:39:18,533 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:18,536 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:18,536 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 19 treesize of output 15 [2021-06-05 04:39:18,537 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:18,558 INFO L628 ElimStorePlain]: treesize reduction 34, result has 45.2 percent of original size [2021-06-05 04:39:18,559 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:18,560 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 13 treesize of output 9 [2021-06-05 04:39:18,562 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:39:18,569 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:39:18,570 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 04:39:18,570 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:75, output treesize:14 [2021-06-05 04:39:18,609 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 04:39:18,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [660663743] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:39:18,610 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:39:18,610 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 22 [2021-06-05 04:39:18,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175677268] [2021-06-05 04:39:18,610 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 04:39:18,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:39:18,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 04:39:18,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:39:18,610 INFO L87 Difference]: Start difference. First operand 139 states and 281 transitions. Second operand has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:39:18,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:39:18,920 INFO L93 Difference]: Finished difference Result 166 states and 324 transitions. [2021-06-05 04:39:18,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:39:18,920 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:39:18,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:39:18,921 INFO L225 Difference]: With dead ends: 166 [2021-06-05 04:39:18,921 INFO L226 Difference]: Without dead ends: 153 [2021-06-05 04:39:18,921 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 444.7ms TimeCoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:39:18,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-06-05 04:39:18,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 140. [2021-06-05 04:39:18,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 2.035971223021583) internal successors, (283), 139 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:39:18,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 283 transitions. [2021-06-05 04:39:18,922 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 283 transitions. Word has length 20 [2021-06-05 04:39:18,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:39:18,922 INFO L482 AbstractCegarLoop]: Abstraction has 140 states and 283 transitions. [2021-06-05 04:39:18,922 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:39:18,922 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 283 transitions. [2021-06-05 04:39:18,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:39:18,922 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:39:18,922 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:39:19,123 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 585 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3107 [2021-06-05 04:39:19,123 INFO L430 AbstractCegarLoop]: === Iteration 591 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:39:19,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:39:19,123 INFO L82 PathProgramCache]: Analyzing trace with hash -1075660566, now seen corresponding path program 585 times [2021-06-05 04:39:19,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:39:19,123 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128782363] [2021-06-05 04:39:19,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:39:19,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:39:19,372 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 04:39:19,373 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:39:19,373 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128782363] [2021-06-05 04:39:19,373 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128782363] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:39:19,373 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588868747] [2021-06-05 04:39:19,373 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 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 04:39:19,399 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:39:19,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:39:19,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:39:19,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:39:19,627 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:19,628 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:19,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:39:19,628 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:19,631 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:19,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:39:19,632 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:19,694 INFO L628 ElimStorePlain]: treesize reduction 88, result has 46.0 percent of original size [2021-06-05 04:39:19,697 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:19,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 04:39:19,698 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:39:19,722 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:39:19,725 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:19,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:39:19,726 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:19,748 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:39:19,750 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:19,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:39:19,752 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:39:19,772 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:39:19,774 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 04:39:19,774 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-06-05 04:39:19,862 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:39:19,862 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1588868747] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:39:19,862 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:39:19,862 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-06-05 04:39:19,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807484199] [2021-06-05 04:39:19,862 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 04:39:19,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:39:19,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 04:39:19,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=450, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:39:19,862 INFO L87 Difference]: Start difference. First operand 140 states and 283 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:39:20,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:39:20,384 INFO L93 Difference]: Finished difference Result 192 states and 367 transitions. [2021-06-05 04:39:20,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:39:20,384 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 04:39:20,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:39:20,384 INFO L225 Difference]: With dead ends: 192 [2021-06-05 04:39:20,384 INFO L226 Difference]: Without dead ends: 173 [2021-06-05 04:39:20,385 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 667.5ms TimeCoverageRelationStatistics Valid=82, Invalid=620, Unknown=0, NotChecked=0, Total=702 [2021-06-05 04:39:20,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-06-05 04:39:20,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 138. [2021-06-05 04:39:20,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 2.0364963503649633) internal successors, (279), 137 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:39:20,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 279 transitions. [2021-06-05 04:39:20,386 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 279 transitions. Word has length 20 [2021-06-05 04:39:20,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:39:20,386 INFO L482 AbstractCegarLoop]: Abstraction has 138 states and 279 transitions. [2021-06-05 04:39:20,386 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 04:39:20,386 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 279 transitions. [2021-06-05 04:39:20,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:39:20,386 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:39:20,386 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:39:20,586 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 586 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3110 [2021-06-05 04:39:20,587 INFO L430 AbstractCegarLoop]: === Iteration 592 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:39:20,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:39:20,587 INFO L82 PathProgramCache]: Analyzing trace with hash 2025165106, now seen corresponding path program 586 times [2021-06-05 04:39:20,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:39:20,587 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369915561] [2021-06-05 04:39:20,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:39:20,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:39:20,776 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:39:20,776 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:39:20,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369915561] [2021-06-05 04:39:20,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369915561] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:39:20,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294164834] [2021-06-05 04:39:20,776 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 587 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 587 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:39:20,801 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:39:20,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:39:20,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:39:20,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:39:21,001 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:21,002 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:21,002 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 19 treesize of output 15 [2021-06-05 04:39:21,003 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:21,005 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:21,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:39:21,006 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:21,028 INFO L628 ElimStorePlain]: treesize reduction 37, result has 43.1 percent of original size [2021-06-05 04:39:21,030 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:21,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 04:39:21,031 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:39:21,038 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:39:21,039 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 04:39:21,039 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:75, output treesize:14 [2021-06-05 04:39:21,078 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 04:39:21,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1294164834] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:39:21,079 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:39:21,079 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 22 [2021-06-05 04:39:21,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914268338] [2021-06-05 04:39:21,079 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 04:39:21,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:39:21,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 04:39:21,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=408, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:39:21,079 INFO L87 Difference]: Start difference. First operand 138 states and 279 transitions. Second operand has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:39:21,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:39:21,334 INFO L93 Difference]: Finished difference Result 161 states and 315 transitions. [2021-06-05 04:39:21,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:39:21,335 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:39:21,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:39:21,335 INFO L225 Difference]: With dead ends: 161 [2021-06-05 04:39:21,335 INFO L226 Difference]: Without dead ends: 142 [2021-06-05 04:39:21,335 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 378.6ms TimeCoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:39:21,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-06-05 04:39:21,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 140. [2021-06-05 04:39:21,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 2.035971223021583) internal successors, (283), 139 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:39:21,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 283 transitions. [2021-06-05 04:39:21,336 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 283 transitions. Word has length 20 [2021-06-05 04:39:21,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:39:21,336 INFO L482 AbstractCegarLoop]: Abstraction has 140 states and 283 transitions. [2021-06-05 04:39:21,336 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:39:21,336 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 283 transitions. [2021-06-05 04:39:21,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:39:21,337 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:39:21,337 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:39:21,537 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3115,587 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:39:21,537 INFO L430 AbstractCegarLoop]: === Iteration 593 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:39:21,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:39:21,537 INFO L82 PathProgramCache]: Analyzing trace with hash -1317448982, now seen corresponding path program 587 times [2021-06-05 04:39:21,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:39:21,537 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319121650] [2021-06-05 04:39:21,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:39:21,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:39:21,707 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:39:21,707 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:39:21,707 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319121650] [2021-06-05 04:39:21,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319121650] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:39:21,707 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852513335] [2021-06-05 04:39:21,707 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 588 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 588 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:39:21,733 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:39:21,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:39:21,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:39:21,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:39:21,942 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:21,942 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:21,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 04:39:21,943 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:21,945 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:21,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 04:39:21,946 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:21,968 INFO L628 ElimStorePlain]: treesize reduction 34, result has 42.4 percent of original size [2021-06-05 04:39:21,970 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:21,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:39:21,971 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:39:21,978 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:39:21,979 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 04:39:21,979 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:83, output treesize:14 [2021-06-05 04:39:22,021 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 04:39:22,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [852513335] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:39:22,022 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:39:22,022 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-06-05 04:39:22,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480192840] [2021-06-05 04:39:22,022 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 04:39:22,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:39:22,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 04:39:22,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=448, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:39:22,022 INFO L87 Difference]: Start difference. First operand 140 states and 283 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:39:22,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:39:22,365 INFO L93 Difference]: Finished difference Result 160 states and 314 transitions. [2021-06-05 04:39:22,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:39:22,366 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 04:39:22,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:39:22,366 INFO L225 Difference]: With dead ends: 160 [2021-06-05 04:39:22,366 INFO L226 Difference]: Without dead ends: 144 [2021-06-05 04:39:22,366 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 457.8ms TimeCoverageRelationStatistics Valid=80, Invalid=622, Unknown=0, NotChecked=0, Total=702 [2021-06-05 04:39:22,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-06-05 04:39:22,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 141. [2021-06-05 04:39:22,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 2.0357142857142856) internal successors, (285), 140 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:39:22,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 285 transitions. [2021-06-05 04:39:22,367 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 285 transitions. Word has length 20 [2021-06-05 04:39:22,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:39:22,368 INFO L482 AbstractCegarLoop]: Abstraction has 141 states and 285 transitions. [2021-06-05 04:39:22,368 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 04:39:22,368 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 285 transitions. [2021-06-05 04:39:22,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:39:22,368 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:39:22,368 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:39:22,568 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3118,588 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:39:22,568 INFO L430 AbstractCegarLoop]: === Iteration 594 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:39:22,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:39:22,568 INFO L82 PathProgramCache]: Analyzing trace with hash -455443918, now seen corresponding path program 588 times [2021-06-05 04:39:22,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:39:22,569 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231144943] [2021-06-05 04:39:22,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:39:22,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:39:22,745 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:39:22,746 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:39:22,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231144943] [2021-06-05 04:39:22,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231144943] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:39:22,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337454544] [2021-06-05 04:39:22,746 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 589 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 589 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:39:22,772 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:39:22,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:39:22,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 04:39:22,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:39:23,049 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:23,050 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 27 treesize of output 21 [2021-06-05 04:39:23,051 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:23,056 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:39:23,058 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:23,058 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 21 treesize of output 13 [2021-06-05 04:39:23,059 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:23,064 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:39:23,065 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 04:39:23,065 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:36, output treesize:13 [2021-06-05 04:39:23,107 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:39:23,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [337454544] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:39:23,107 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:39:23,107 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-06-05 04:39:23,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977200020] [2021-06-05 04:39:23,107 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 04:39:23,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:39:23,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 04:39:23,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=448, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:39:23,107 INFO L87 Difference]: Start difference. First operand 141 states and 285 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:39:23,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:39:23,634 INFO L93 Difference]: Finished difference Result 163 states and 327 transitions. [2021-06-05 04:39:23,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 04:39:23,634 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 04:39:23,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:39:23,635 INFO L225 Difference]: With dead ends: 163 [2021-06-05 04:39:23,635 INFO L226 Difference]: Without dead ends: 156 [2021-06-05 04:39:23,635 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 548.9ms TimeCoverageRelationStatistics Valid=91, Invalid=721, Unknown=0, NotChecked=0, Total=812 [2021-06-05 04:39:23,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-06-05 04:39:23,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 142. [2021-06-05 04:39:23,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 2.0425531914893615) internal successors, (288), 141 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:39:23,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 288 transitions. [2021-06-05 04:39:23,636 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 288 transitions. Word has length 20 [2021-06-05 04:39:23,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:39:23,636 INFO L482 AbstractCegarLoop]: Abstraction has 142 states and 288 transitions. [2021-06-05 04:39:23,636 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 04:39:23,636 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 288 transitions. [2021-06-05 04:39:23,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:39:23,636 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:39:23,636 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:39:23,837 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 589 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3122 [2021-06-05 04:39:23,837 INFO L430 AbstractCegarLoop]: === Iteration 595 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:39:23,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:39:23,837 INFO L82 PathProgramCache]: Analyzing trace with hash 680741354, now seen corresponding path program 589 times [2021-06-05 04:39:23,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:39:23,837 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957074933] [2021-06-05 04:39:23,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:39:23,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:39:24,040 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:39:24,041 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:39:24,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957074933] [2021-06-05 04:39:24,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957074933] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:39:24,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810564561] [2021-06-05 04:39:24,041 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 590 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 590 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:39:24,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:39:24,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:39:24,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:39:24,271 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:24,271 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:24,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:39:24,272 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:24,275 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:24,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:39:24,276 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:24,337 INFO L628 ElimStorePlain]: treesize reduction 88, result has 46.0 percent of original size [2021-06-05 04:39:24,340 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:24,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 04:39:24,341 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:39:24,365 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:39:24,367 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:24,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:39:24,369 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:24,390 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:39:24,392 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:24,393 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 10 treesize of output 6 [2021-06-05 04:39:24,394 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:39:24,415 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:39:24,416 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:39:24,416 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-06-05 04:39:24,499 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 04:39:24,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [810564561] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:39:24,499 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:39:24,499 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-06-05 04:39:24,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790629233] [2021-06-05 04:39:24,500 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 04:39:24,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:39:24,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 04:39:24,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=447, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:39:24,500 INFO L87 Difference]: Start difference. First operand 142 states and 288 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:39:25,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:39:25,130 INFO L93 Difference]: Finished difference Result 190 states and 366 transitions. [2021-06-05 04:39:25,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 04:39:25,130 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:39:25,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:39:25,130 INFO L225 Difference]: With dead ends: 190 [2021-06-05 04:39:25,130 INFO L226 Difference]: Without dead ends: 171 [2021-06-05 04:39:25,131 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 707.2ms TimeCoverageRelationStatistics Valid=106, Invalid=824, Unknown=0, NotChecked=0, Total=930 [2021-06-05 04:39:25,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-06-05 04:39:25,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 142. [2021-06-05 04:39:25,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 2.0425531914893615) internal successors, (288), 141 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:39:25,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 288 transitions. [2021-06-05 04:39:25,132 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 288 transitions. Word has length 20 [2021-06-05 04:39:25,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:39:25,133 INFO L482 AbstractCegarLoop]: Abstraction has 142 states and 288 transitions. [2021-06-05 04:39:25,133 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 04:39:25,133 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 288 transitions. [2021-06-05 04:39:25,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:39:25,133 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:39:25,133 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:39:25,355 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 590 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3125 [2021-06-05 04:39:25,355 INFO L430 AbstractCegarLoop]: === Iteration 596 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:39:25,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:39:25,355 INFO L82 PathProgramCache]: Analyzing trace with hash 401777130, now seen corresponding path program 590 times [2021-06-05 04:39:25,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:39:25,355 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349286029] [2021-06-05 04:39:25,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:39:25,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:39:25,491 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 04:39:25,491 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:39:25,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349286029] [2021-06-05 04:39:25,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349286029] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:39:25,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1073487418] [2021-06-05 04:39:25,491 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 04:39:25,516 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:39:25,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:39:25,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:39:25,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:39:25,696 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:25,697 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:25,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:39:25,698 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:25,700 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:25,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:39:25,700 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:25,722 INFO L628 ElimStorePlain]: treesize reduction 34, result has 42.4 percent of original size [2021-06-05 04:39:25,724 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:25,724 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 10 treesize of output 6 [2021-06-05 04:39:25,725 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:39:25,732 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:39:25,733 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 04:39:25,733 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:75, output treesize:14 [2021-06-05 04:39:25,769 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:39:25,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1073487418] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:39:25,770 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:39:25,770 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 22 [2021-06-05 04:39:25,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613793543] [2021-06-05 04:39:25,770 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 04:39:25,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:39:25,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 04:39:25,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=405, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:39:25,770 INFO L87 Difference]: Start difference. First operand 142 states and 288 transitions. Second operand has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:39:26,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:39:26,319 INFO L93 Difference]: Finished difference Result 173 states and 345 transitions. [2021-06-05 04:39:26,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 04:39:26,319 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:39:26,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:39:26,319 INFO L225 Difference]: With dead ends: 173 [2021-06-05 04:39:26,319 INFO L226 Difference]: Without dead ends: 157 [2021-06-05 04:39:26,320 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 507.3ms TimeCoverageRelationStatistics Valid=119, Invalid=937, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 04:39:26,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-06-05 04:39:26,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 144. [2021-06-05 04:39:26,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 2.041958041958042) internal successors, (292), 143 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:39:26,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 292 transitions. [2021-06-05 04:39:26,321 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 292 transitions. Word has length 20 [2021-06-05 04:39:26,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:39:26,321 INFO L482 AbstractCegarLoop]: Abstraction has 144 states and 292 transitions. [2021-06-05 04:39:26,321 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:39:26,321 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 292 transitions. [2021-06-05 04:39:26,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:39:26,321 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:39:26,321 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:39:26,521 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 591 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3130 [2021-06-05 04:39:26,522 INFO L430 AbstractCegarLoop]: === Iteration 597 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:39:26,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:39:26,522 INFO L82 PathProgramCache]: Analyzing trace with hash 1263782194, now seen corresponding path program 591 times [2021-06-05 04:39:26,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:39:26,522 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453562892] [2021-06-05 04:39:26,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:39:26,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:39:26,684 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 04:39:26,684 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:39:26,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453562892] [2021-06-05 04:39:26,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453562892] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:39:26,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677511051] [2021-06-05 04:39:26,685 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 592 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 592 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:39:26,710 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:39:26,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:39:26,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:39:26,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:39:26,907 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:26,907 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:26,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:39:26,908 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:26,910 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:26,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:39:26,911 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:26,933 INFO L628 ElimStorePlain]: treesize reduction 37, result has 43.1 percent of original size [2021-06-05 04:39:26,935 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:26,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 04:39:26,937 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:39:26,943 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:39:26,944 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 04:39:26,944 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:75, output treesize:14 [2021-06-05 04:39:26,981 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:39:26,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [677511051] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:39:26,981 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:39:26,981 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 22 [2021-06-05 04:39:26,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865083562] [2021-06-05 04:39:26,981 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 04:39:26,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:39:26,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 04:39:26,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=406, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:39:26,982 INFO L87 Difference]: Start difference. First operand 144 states and 292 transitions. Second operand has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:39:27,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:39:27,399 INFO L93 Difference]: Finished difference Result 164 states and 324 transitions. [2021-06-05 04:39:27,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 04:39:27,399 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:39:27,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:39:27,399 INFO L225 Difference]: With dead ends: 164 [2021-06-05 04:39:27,399 INFO L226 Difference]: Without dead ends: 151 [2021-06-05 04:39:27,399 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 504.5ms TimeCoverageRelationStatistics Valid=100, Invalid=770, Unknown=0, NotChecked=0, Total=870 [2021-06-05 04:39:27,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-06-05 04:39:27,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 145. [2021-06-05 04:39:27,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 2.0416666666666665) internal successors, (294), 144 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:39:27,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 294 transitions. [2021-06-05 04:39:27,400 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 294 transitions. Word has length 20 [2021-06-05 04:39:27,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:39:27,401 INFO L482 AbstractCegarLoop]: Abstraction has 145 states and 294 transitions. [2021-06-05 04:39:27,401 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:39:27,401 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 294 transitions. [2021-06-05 04:39:27,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:39:27,401 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:39:27,401 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:39:27,601 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3134,592 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:39:27,601 INFO L430 AbstractCegarLoop]: === Iteration 598 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:39:27,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:39:27,601 INFO L82 PathProgramCache]: Analyzing trace with hash -1894999830, now seen corresponding path program 592 times [2021-06-05 04:39:27,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:39:27,602 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094645086] [2021-06-05 04:39:27,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:39:27,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:39:27,836 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 04:39:27,836 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:39:27,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094645086] [2021-06-05 04:39:27,836 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094645086] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:39:27,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911665057] [2021-06-05 04:39:27,836 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 593 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 593 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:39:27,861 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:39:27,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:39:27,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:39:27,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:39:28,025 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:28,025 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:28,025 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 19 treesize of output 15 [2021-06-05 04:39:28,026 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:28,029 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:28,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:39:28,030 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:28,091 INFO L628 ElimStorePlain]: treesize reduction 85, result has 45.9 percent of original size [2021-06-05 04:39:28,093 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:28,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:39:28,095 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:39:28,118 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:39:28,121 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:28,121 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 19 treesize of output 15 [2021-06-05 04:39:28,122 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:28,143 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:39:28,145 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:28,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 04:39:28,147 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:39:28,167 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:39:28,169 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 04:39:28,169 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-06-05 04:39:28,256 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:39:28,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1911665057] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:39:28,256 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:39:28,256 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-06-05 04:39:28,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579379661] [2021-06-05 04:39:28,256 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 04:39:28,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:39:28,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 04:39:28,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:39:28,257 INFO L87 Difference]: Start difference. First operand 145 states and 294 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:39:28,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:39:28,796 INFO L93 Difference]: Finished difference Result 167 states and 331 transitions. [2021-06-05 04:39:28,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 04:39:28,797 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:39:28,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:39:28,797 INFO L225 Difference]: With dead ends: 167 [2021-06-05 04:39:28,797 INFO L226 Difference]: Without dead ends: 155 [2021-06-05 04:39:28,797 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 670.8ms TimeCoverageRelationStatistics Valid=118, Invalid=938, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 04:39:28,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-06-05 04:39:28,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 146. [2021-06-05 04:39:28,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 2.0413793103448277) internal successors, (296), 145 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:39:28,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 296 transitions. [2021-06-05 04:39:28,799 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 296 transitions. Word has length 20 [2021-06-05 04:39:28,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:39:28,799 INFO L482 AbstractCegarLoop]: Abstraction has 146 states and 296 transitions. [2021-06-05 04:39:28,799 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 04:39:28,799 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 296 transitions. [2021-06-05 04:39:28,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:39:28,799 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:39:28,800 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:39:29,012 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3138,593 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:39:29,013 INFO L430 AbstractCegarLoop]: === Iteration 599 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:39:29,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:39:29,013 INFO L82 PathProgramCache]: Analyzing trace with hash -1728800206, now seen corresponding path program 593 times [2021-06-05 04:39:29,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:39:29,013 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536898766] [2021-06-05 04:39:29,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:39:29,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:39:29,202 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:39:29,202 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:39:29,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536898766] [2021-06-05 04:39:29,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536898766] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:39:29,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053712180] [2021-06-05 04:39:29,202 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 594 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 594 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:39:29,228 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:39:29,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:39:29,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:39:29,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:39:29,396 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:29,396 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:29,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:39:29,397 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:29,399 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:29,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:39:29,400 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:29,422 INFO L628 ElimStorePlain]: treesize reduction 37, result has 43.1 percent of original size [2021-06-05 04:39:29,423 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:29,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 04:39:29,425 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:39:29,431 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:39:29,432 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 04:39:29,432 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:75, output treesize:14 [2021-06-05 04:39:29,473 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 04:39:29,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2053712180] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:39:29,473 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:39:29,473 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-06-05 04:39:29,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139168451] [2021-06-05 04:39:29,474 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 04:39:29,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:39:29,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 04:39:29,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:39:29,474 INFO L87 Difference]: Start difference. First operand 146 states and 296 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:39:30,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:39:30,004 INFO L93 Difference]: Finished difference Result 173 states and 345 transitions. [2021-06-05 04:39:30,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 04:39:30,005 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 04:39:30,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:39:30,005 INFO L225 Difference]: With dead ends: 173 [2021-06-05 04:39:30,005 INFO L226 Difference]: Without dead ends: 160 [2021-06-05 04:39:30,005 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 529.6ms TimeCoverageRelationStatistics Valid=105, Invalid=887, Unknown=0, NotChecked=0, Total=992 [2021-06-05 04:39:30,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-06-05 04:39:30,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 153. [2021-06-05 04:39:30,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 2.039473684210526) internal successors, (310), 152 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:39:30,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 310 transitions. [2021-06-05 04:39:30,007 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 310 transitions. Word has length 20 [2021-06-05 04:39:30,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:39:30,007 INFO L482 AbstractCegarLoop]: Abstraction has 153 states and 310 transitions. [2021-06-05 04:39:30,007 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 04:39:30,007 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 310 transitions. [2021-06-05 04:39:30,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:39:30,007 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:39:30,007 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:39:30,212 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 594 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3143 [2021-06-05 04:39:30,213 INFO L430 AbstractCegarLoop]: === Iteration 600 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:39:30,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:39:30,213 INFO L82 PathProgramCache]: Analyzing trace with hash -592614934, now seen corresponding path program 594 times [2021-06-05 04:39:30,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:39:30,213 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442768282] [2021-06-05 04:39:30,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:39:30,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:39:30,450 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 04:39:30,450 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:39:30,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442768282] [2021-06-05 04:39:30,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442768282] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:39:30,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982001745] [2021-06-05 04:39:30,450 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 04:39:30,477 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:39:30,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:39:30,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:39:30,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:39:30,614 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:30,615 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:30,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:39:30,616 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:30,619 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:30,619 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 19 treesize of output 15 [2021-06-05 04:39:30,619 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:30,680 INFO L628 ElimStorePlain]: treesize reduction 88, result has 46.0 percent of original size [2021-06-05 04:39:30,682 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:30,682 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 13 treesize of output 9 [2021-06-05 04:39:30,684 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:39:30,707 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:39:30,709 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:30,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:39:30,710 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:30,732 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:39:30,734 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:30,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:39:30,735 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:39:30,756 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:39:30,757 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 04:39:30,757 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-06-05 04:39:30,837 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:39:30,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1982001745] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:39:30,838 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:39:30,838 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-06-05 04:39:30,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547681413] [2021-06-05 04:39:30,838 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 04:39:30,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:39:30,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 04:39:30,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:39:30,838 INFO L87 Difference]: Start difference. First operand 153 states and 310 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:39:31,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:39:31,570 INFO L93 Difference]: Finished difference Result 197 states and 382 transitions. [2021-06-05 04:39:31,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 04:39:31,570 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 04:39:31,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:39:31,570 INFO L225 Difference]: With dead ends: 197 [2021-06-05 04:39:31,570 INFO L226 Difference]: Without dead ends: 178 [2021-06-05 04:39:31,571 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 730.6ms TimeCoverageRelationStatistics Valid=130, Invalid=1060, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 04:39:31,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-06-05 04:39:31,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 152. [2021-06-05 04:39:31,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 2.0397350993377485) internal successors, (308), 151 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:39:31,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 308 transitions. [2021-06-05 04:39:31,572 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 308 transitions. Word has length 20 [2021-06-05 04:39:31,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:39:31,572 INFO L482 AbstractCegarLoop]: Abstraction has 152 states and 308 transitions. [2021-06-05 04:39:31,572 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 04:39:31,572 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 308 transitions. [2021-06-05 04:39:31,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:39:31,572 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:39:31,572 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:39:31,772 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3146,595 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:39:31,773 INFO L430 AbstractCegarLoop]: === Iteration 601 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:39:31,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:39:31,773 INFO L82 PathProgramCache]: Analyzing trace with hash 1556181602, now seen corresponding path program 595 times [2021-06-05 04:39:31,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:39:31,773 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528177305] [2021-06-05 04:39:31,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:39:31,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:39:31,977 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:39:31,978 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:39:31,978 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528177305] [2021-06-05 04:39:31,978 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528177305] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:39:31,978 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429258651] [2021-06-05 04:39:31,978 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 596 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 596 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:39:32,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:39:32,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:39:32,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:39:32,123 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:32,124 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:32,124 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 19 treesize of output 15 [2021-06-05 04:39:32,124 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:32,127 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:32,128 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:32,128 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 19 treesize of output 15 [2021-06-05 04:39:32,128 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:32,131 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:32,131 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:32,132 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 19 treesize of output 15 [2021-06-05 04:39:32,132 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:32,135 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:32,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:39:32,136 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:32,191 INFO L628 ElimStorePlain]: treesize reduction 80, result has 45.6 percent of original size [2021-06-05 04:39:32,194 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:32,194 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:32,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 04:39:32,196 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:39:32,198 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:32,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:39:32,199 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:39:32,222 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:39:32,223 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 04:39:32,223 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:173, output treesize:38 [2021-06-05 04:39:32,307 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 04:39:32,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1429258651] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:39:32,307 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:39:32,307 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-06-05 04:39:32,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716159028] [2021-06-05 04:39:32,307 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 04:39:32,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:39:32,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 04:39:32,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:39:32,308 INFO L87 Difference]: Start difference. First operand 152 states and 308 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:39:33,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:39:33,225 INFO L93 Difference]: Finished difference Result 219 states and 423 transitions. [2021-06-05 04:39:33,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 04:39:33,225 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 04:39:33,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:39:33,225 INFO L225 Difference]: With dead ends: 219 [2021-06-05 04:39:33,225 INFO L226 Difference]: Without dead ends: 193 [2021-06-05 04:39:33,225 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 901.9ms TimeCoverageRelationStatistics Valid=152, Invalid=1180, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 04:39:33,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-06-05 04:39:33,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 155. [2021-06-05 04:39:33,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 2.0584415584415585) internal successors, (317), 154 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:39:33,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 317 transitions. [2021-06-05 04:39:33,227 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 317 transitions. Word has length 20 [2021-06-05 04:39:33,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:39:33,227 INFO L482 AbstractCegarLoop]: Abstraction has 155 states and 317 transitions. [2021-06-05 04:39:33,227 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 04:39:33,227 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 317 transitions. [2021-06-05 04:39:33,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:39:33,227 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:39:33,227 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:39:33,427 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 596 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3151 [2021-06-05 04:39:33,428 INFO L430 AbstractCegarLoop]: === Iteration 602 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:39:33,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:39:33,428 INFO L82 PathProgramCache]: Analyzing trace with hash -550602518, now seen corresponding path program 596 times [2021-06-05 04:39:33,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:39:33,428 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183871402] [2021-06-05 04:39:33,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:39:33,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:39:33,646 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:39:33,646 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:39:33,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183871402] [2021-06-05 04:39:33,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183871402] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:39:33,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469348701] [2021-06-05 04:39:33,647 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 597 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 597 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:39:33,672 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:39:33,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:39:33,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:39:33,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:39:33,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:33,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:33,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:39:33,806 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:33,809 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:33,809 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:33,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:39:33,810 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:33,813 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:33,813 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:33,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:39:33,814 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:33,816 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:33,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:39:33,817 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:33,872 INFO L628 ElimStorePlain]: treesize reduction 80, result has 45.6 percent of original size [2021-06-05 04:39:33,875 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:33,875 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:33,875 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 13 treesize of output 9 [2021-06-05 04:39:33,877 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:39:33,879 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:33,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:39:33,880 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:39:33,903 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:39:33,904 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 04:39:33,904 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:173, output treesize:38 [2021-06-05 04:39:33,987 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:39:33,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [469348701] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:39:33,987 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:39:33,987 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-06-05 04:39:33,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365092249] [2021-06-05 04:39:33,987 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 04:39:33,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:39:33,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 04:39:33,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:39:33,988 INFO L87 Difference]: Start difference. First operand 155 states and 317 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:39:34,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:39:34,947 INFO L93 Difference]: Finished difference Result 212 states and 420 transitions. [2021-06-05 04:39:34,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 04:39:34,947 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 04:39:34,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:39:34,948 INFO L225 Difference]: With dead ends: 212 [2021-06-05 04:39:34,948 INFO L226 Difference]: Without dead ends: 193 [2021-06-05 04:39:34,948 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 975.5ms TimeCoverageRelationStatistics Valid=157, Invalid=1403, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 04:39:34,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-06-05 04:39:34,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 156. [2021-06-05 04:39:34,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 2.064516129032258) internal successors, (320), 155 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:39:34,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 320 transitions. [2021-06-05 04:39:34,949 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 320 transitions. Word has length 20 [2021-06-05 04:39:34,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:39:34,949 INFO L482 AbstractCegarLoop]: Abstraction has 156 states and 320 transitions. [2021-06-05 04:39:34,949 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 04:39:34,949 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 320 transitions. [2021-06-05 04:39:34,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:39:34,950 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:39:34,950 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:39:35,150 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 597 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3154 [2021-06-05 04:39:35,150 INFO L430 AbstractCegarLoop]: === Iteration 603 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:39:35,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:39:35,150 INFO L82 PathProgramCache]: Analyzing trace with hash 1069380134, now seen corresponding path program 597 times [2021-06-05 04:39:35,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:39:35,150 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921245546] [2021-06-05 04:39:35,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:39:35,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:39:35,290 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 04:39:35,290 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:39:35,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921245546] [2021-06-05 04:39:35,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921245546] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:39:35,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114339085] [2021-06-05 04:39:35,290 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 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 04:39:35,316 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:39:35,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:39:35,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 04:39:35,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:39:35,528 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:35,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 04:39:35,529 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:35,535 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:39:35,537 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:35,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:39:35,539 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:39:35,544 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:39:35,545 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 04:39:35,545 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:36, output treesize:13 [2021-06-05 04:39:35,582 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 04:39:35,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1114339085] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:39:35,583 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:39:35,583 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-06-05 04:39:35,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515336804] [2021-06-05 04:39:35,583 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 04:39:35,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:39:35,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 04:39:35,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=450, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:39:35,583 INFO L87 Difference]: Start difference. First operand 156 states and 320 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:39:35,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:39:35,960 INFO L93 Difference]: Finished difference Result 191 states and 388 transitions. [2021-06-05 04:39:35,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:39:35,961 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:39:35,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:39:35,961 INFO L225 Difference]: With dead ends: 191 [2021-06-05 04:39:35,961 INFO L226 Difference]: Without dead ends: 184 [2021-06-05 04:39:35,961 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 406.2ms TimeCoverageRelationStatistics Valid=77, Invalid=625, Unknown=0, NotChecked=0, Total=702 [2021-06-05 04:39:35,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-06-05 04:39:35,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 157. [2021-06-05 04:39:35,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 2.0705128205128207) internal successors, (323), 156 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:39:35,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 323 transitions. [2021-06-05 04:39:35,962 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 323 transitions. Word has length 20 [2021-06-05 04:39:35,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:39:35,962 INFO L482 AbstractCegarLoop]: Abstraction has 157 states and 323 transitions. [2021-06-05 04:39:35,962 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:39:35,962 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 323 transitions. [2021-06-05 04:39:35,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:39:35,963 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:39:35,963 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:39:36,163 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3157,598 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:39:36,163 INFO L430 AbstractCegarLoop]: === Iteration 604 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:39:36,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:39:36,163 INFO L82 PathProgramCache]: Analyzing trace with hash 527558510, now seen corresponding path program 598 times [2021-06-05 04:39:36,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:39:36,163 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14890148] [2021-06-05 04:39:36,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:39:36,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:39:36,314 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 04:39:36,315 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:39:36,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14890148] [2021-06-05 04:39:36,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14890148] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:39:36,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226909729] [2021-06-05 04:39:36,315 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 599 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 599 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:39:36,343 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:39:36,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:39:36,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:39:36,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:39:36,571 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:36,571 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:36,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:39:36,572 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:36,574 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:36,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:39:36,575 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:36,597 INFO L628 ElimStorePlain]: treesize reduction 37, result has 43.1 percent of original size [2021-06-05 04:39:36,598 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:36,599 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 13 treesize of output 9 [2021-06-05 04:39:36,600 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:39:36,606 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:39:36,607 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 04:39:36,607 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:75, output treesize:14 [2021-06-05 04:39:36,646 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:39:36,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [226909729] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:39:36,646 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:39:36,646 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-06-05 04:39:36,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107725128] [2021-06-05 04:39:36,646 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 04:39:36,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:39:36,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 04:39:36,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=450, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:39:36,646 INFO L87 Difference]: Start difference. First operand 157 states and 323 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:39:37,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:39:37,020 INFO L93 Difference]: Finished difference Result 203 states and 405 transitions. [2021-06-05 04:39:37,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:39:37,020 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:39:37,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:39:37,020 INFO L225 Difference]: With dead ends: 203 [2021-06-05 04:39:37,021 INFO L226 Difference]: Without dead ends: 184 [2021-06-05 04:39:37,021 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 429.4ms TimeCoverageRelationStatistics Valid=78, Invalid=624, Unknown=0, NotChecked=0, Total=702 [2021-06-05 04:39:37,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-06-05 04:39:37,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 158. [2021-06-05 04:39:37,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 2.070063694267516) internal successors, (325), 157 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:39:37,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 325 transitions. [2021-06-05 04:39:37,022 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 325 transitions. Word has length 20 [2021-06-05 04:39:37,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:39:37,022 INFO L482 AbstractCegarLoop]: Abstraction has 158 states and 325 transitions. [2021-06-05 04:39:37,022 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:39:37,022 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 325 transitions. [2021-06-05 04:39:37,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:39:37,022 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:39:37,022 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:39:37,223 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 599 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3161 [2021-06-05 04:39:37,223 INFO L430 AbstractCegarLoop]: === Iteration 605 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:39:37,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:39:37,223 INFO L82 PathProgramCache]: Analyzing trace with hash 1479911718, now seen corresponding path program 599 times [2021-06-05 04:39:37,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:39:37,223 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708054173] [2021-06-05 04:39:37,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:39:37,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:39:37,513 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:39:37,514 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:39:37,514 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708054173] [2021-06-05 04:39:37,514 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708054173] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:39:37,514 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506819575] [2021-06-05 04:39:37,514 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 600 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 600 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:39:37,583 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:39:37,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:39:37,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:39:37,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:39:37,846 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:37,846 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:37,846 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 27 treesize of output 21 [2021-06-05 04:39:37,847 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:37,849 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:37,849 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 27 treesize of output 21 [2021-06-05 04:39:37,850 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:37,871 INFO L628 ElimStorePlain]: treesize reduction 34, result has 42.4 percent of original size [2021-06-05 04:39:37,873 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:37,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:39:37,875 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:39:37,881 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:39:37,882 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 04:39:37,882 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:83, output treesize:14 [2021-06-05 04:39:37,926 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:39:37,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1506819575] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:39:37,927 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:39:37,927 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 04:39:37,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357568205] [2021-06-05 04:39:37,927 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 04:39:37,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:39:37,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 04:39:37,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:39:37,927 INFO L87 Difference]: Start difference. First operand 158 states and 325 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:39:38,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:39:38,234 INFO L93 Difference]: Finished difference Result 186 states and 369 transitions. [2021-06-05 04:39:38,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:39:38,234 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 04:39:38,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:39:38,235 INFO L225 Difference]: With dead ends: 186 [2021-06-05 04:39:38,235 INFO L226 Difference]: Without dead ends: 170 [2021-06-05 04:39:38,235 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 607.4ms TimeCoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2021-06-05 04:39:38,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-06-05 04:39:38,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 159. [2021-06-05 04:39:38,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 2.069620253164557) internal successors, (327), 158 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:39:38,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 327 transitions. [2021-06-05 04:39:38,236 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 327 transitions. Word has length 20 [2021-06-05 04:39:38,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:39:38,236 INFO L482 AbstractCegarLoop]: Abstraction has 159 states and 327 transitions. [2021-06-05 04:39:38,236 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 04:39:38,236 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 327 transitions. [2021-06-05 04:39:38,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:39:38,237 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:39:38,237 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:39:38,437 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 600 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3164 [2021-06-05 04:39:38,437 INFO L430 AbstractCegarLoop]: === Iteration 606 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:39:38,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:39:38,437 INFO L82 PathProgramCache]: Analyzing trace with hash -1953050514, now seen corresponding path program 600 times [2021-06-05 04:39:38,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:39:38,437 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777120806] [2021-06-05 04:39:38,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:39:38,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:39:38,628 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 04:39:38,628 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:39:38,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777120806] [2021-06-05 04:39:38,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777120806] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:39:38,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065170895] [2021-06-05 04:39:38,628 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 601 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 601 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:39:38,654 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:39:38,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:39:38,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 04:39:38,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:39:38,920 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:38,920 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 27 treesize of output 21 [2021-06-05 04:39:38,921 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:38,928 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:39:38,929 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:38,929 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 21 treesize of output 13 [2021-06-05 04:39:38,930 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:38,935 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:39:38,936 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 04:39:38,936 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:36, output treesize:13 [2021-06-05 04:39:38,961 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 04:39:38,961 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2065170895] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:39:38,961 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:39:38,961 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 22 [2021-06-05 04:39:38,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067390453] [2021-06-05 04:39:38,962 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 04:39:38,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:39:38,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 04:39:38,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=411, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:39:38,962 INFO L87 Difference]: Start difference. First operand 159 states and 327 transitions. Second operand has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:39:39,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:39:39,268 INFO L93 Difference]: Finished difference Result 189 states and 378 transitions. [2021-06-05 04:39:39,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:39:39,268 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:39:39,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:39:39,268 INFO L225 Difference]: With dead ends: 189 [2021-06-05 04:39:39,268 INFO L226 Difference]: Without dead ends: 182 [2021-06-05 04:39:39,269 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 483.2ms TimeCoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:39:39,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2021-06-05 04:39:39,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 160. [2021-06-05 04:39:39,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 2.0754716981132075) internal successors, (330), 159 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:39:39,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 330 transitions. [2021-06-05 04:39:39,270 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 330 transitions. Word has length 20 [2021-06-05 04:39:39,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:39:39,270 INFO L482 AbstractCegarLoop]: Abstraction has 160 states and 330 transitions. [2021-06-05 04:39:39,270 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:39:39,270 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 330 transitions. [2021-06-05 04:39:39,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:39:39,270 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:39:39,270 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:39:39,471 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3168,601 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:39:39,471 INFO L430 AbstractCegarLoop]: === Iteration 607 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:39:39,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:39:39,471 INFO L82 PathProgramCache]: Analyzing trace with hash -816865242, now seen corresponding path program 601 times [2021-06-05 04:39:39,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:39:39,471 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740198379] [2021-06-05 04:39:39,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:39:39,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:39:39,747 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 04:39:39,747 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:39:39,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740198379] [2021-06-05 04:39:39,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740198379] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:39:39,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843024342] [2021-06-05 04:39:39,747 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 602 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 602 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:39:39,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:39:39,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:39:39,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:39:40,026 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:40,027 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:40,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:39:40,027 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:40,030 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:40,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:39:40,031 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:40,091 INFO L628 ElimStorePlain]: treesize reduction 88, result has 45.0 percent of original size [2021-06-05 04:39:40,094 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:40,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:39:40,095 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:40,116 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:39:40,119 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:40,119 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 10 treesize of output 6 [2021-06-05 04:39:40,120 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:39:40,142 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:39:40,145 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:40,145 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 10 treesize of output 6 [2021-06-05 04:39:40,146 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:39:40,167 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:39:40,168 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:39:40,168 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-06-05 04:39:40,259 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:39:40,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [843024342] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:39:40,259 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:39:40,259 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 04:39:40,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382366054] [2021-06-05 04:39:40,259 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 04:39:40,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:39:40,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 04:39:40,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:39:40,260 INFO L87 Difference]: Start difference. First operand 160 states and 330 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:39:40,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:39:40,805 INFO L93 Difference]: Finished difference Result 216 states and 421 transitions. [2021-06-05 04:39:40,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:39:40,806 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 04:39:40,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:39:40,806 INFO L225 Difference]: With dead ends: 216 [2021-06-05 04:39:40,806 INFO L226 Difference]: Without dead ends: 197 [2021-06-05 04:39:40,806 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 746.9ms TimeCoverageRelationStatistics Valid=90, Invalid=722, Unknown=0, NotChecked=0, Total=812 [2021-06-05 04:39:40,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-06-05 04:39:40,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 157. [2021-06-05 04:39:40,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 2.0705128205128207) internal successors, (323), 156 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:39:40,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 323 transitions. [2021-06-05 04:39:40,808 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 323 transitions. Word has length 20 [2021-06-05 04:39:40,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:39:40,808 INFO L482 AbstractCegarLoop]: Abstraction has 157 states and 323 transitions. [2021-06-05 04:39:40,808 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 04:39:40,808 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 323 transitions. [2021-06-05 04:39:40,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:39:40,808 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:39:40,808 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:39:41,008 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3171,602 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:39:41,008 INFO L430 AbstractCegarLoop]: === Iteration 608 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:39:41,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:39:41,009 INFO L82 PathProgramCache]: Analyzing trace with hash -1162384394, now seen corresponding path program 602 times [2021-06-05 04:39:41,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:39:41,009 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307013457] [2021-06-05 04:39:41,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:39:41,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:39:41,209 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 04:39:41,209 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:39:41,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307013457] [2021-06-05 04:39:41,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307013457] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:39:41,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [801080223] [2021-06-05 04:39:41,209 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 603 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 603 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:39:41,234 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:39:41,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:39:41,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:39:41,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:39:41,438 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:41,439 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:41,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 04:39:41,440 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:41,442 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:41,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 04:39:41,443 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:41,464 INFO L628 ElimStorePlain]: treesize reduction 34, result has 47.7 percent of original size [2021-06-05 04:39:41,465 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:41,466 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 21 treesize of output 13 [2021-06-05 04:39:41,466 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:41,473 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:39:41,473 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 04:39:41,474 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:83, output treesize:14 [2021-06-05 04:39:41,516 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 04:39:41,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [801080223] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:39:41,517 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:39:41,517 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 04:39:41,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994893208] [2021-06-05 04:39:41,517 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 04:39:41,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:39:41,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 04:39:41,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=492, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:39:41,517 INFO L87 Difference]: Start difference. First operand 157 states and 323 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:39:41,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:39:41,785 INFO L93 Difference]: Finished difference Result 179 states and 357 transitions. [2021-06-05 04:39:41,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:39:41,785 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 04:39:41,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:39:41,785 INFO L225 Difference]: With dead ends: 179 [2021-06-05 04:39:41,785 INFO L226 Difference]: Without dead ends: 160 [2021-06-05 04:39:41,785 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 437.3ms TimeCoverageRelationStatistics Valid=71, Invalid=579, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:39:41,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-06-05 04:39:41,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 158. [2021-06-05 04:39:41,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 2.070063694267516) internal successors, (325), 157 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:39:41,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 325 transitions. [2021-06-05 04:39:41,787 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 325 transitions. Word has length 20 [2021-06-05 04:39:41,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:39:41,787 INFO L482 AbstractCegarLoop]: Abstraction has 158 states and 325 transitions. [2021-06-05 04:39:41,787 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 04:39:41,787 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 325 transitions. [2021-06-05 04:39:41,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:39:41,787 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:39:41,787 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:39:41,987 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 603 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3176 [2021-06-05 04:39:41,987 INFO L430 AbstractCegarLoop]: === Iteration 609 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:39:41,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:39:41,988 INFO L82 PathProgramCache]: Analyzing trace with hash -210031186, now seen corresponding path program 603 times [2021-06-05 04:39:41,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:39:41,988 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907057129] [2021-06-05 04:39:41,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:39:41,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:39:42,233 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 04:39:42,233 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:39:42,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907057129] [2021-06-05 04:39:42,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907057129] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:39:42,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182150024] [2021-06-05 04:39:42,233 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 604 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 604 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:39:42,259 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:39:42,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:39:42,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:39:42,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:39:42,481 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:42,481 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:42,482 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 19 treesize of output 15 [2021-06-05 04:39:42,482 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:42,484 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:42,485 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 19 treesize of output 15 [2021-06-05 04:39:42,485 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:42,506 INFO L628 ElimStorePlain]: treesize reduction 34, result has 45.2 percent of original size [2021-06-05 04:39:42,508 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:42,508 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 13 treesize of output 9 [2021-06-05 04:39:42,509 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:39:42,516 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:39:42,517 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 04:39:42,517 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:75, output treesize:14 [2021-06-05 04:39:42,558 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 04:39:42,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [182150024] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:39:42,559 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:39:42,559 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 04:39:42,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539301372] [2021-06-05 04:39:42,559 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 04:39:42,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:39:42,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 04:39:42,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=491, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:39:42,559 INFO L87 Difference]: Start difference. First operand 158 states and 325 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:39:42,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:39:42,890 INFO L93 Difference]: Finished difference Result 177 states and 354 transitions. [2021-06-05 04:39:42,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:39:42,890 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 04:39:42,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:39:42,890 INFO L225 Difference]: With dead ends: 177 [2021-06-05 04:39:42,890 INFO L226 Difference]: Without dead ends: 161 [2021-06-05 04:39:42,891 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 552.0ms TimeCoverageRelationStatistics Valid=83, Invalid=673, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:39:42,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-06-05 04:39:42,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 159. [2021-06-05 04:39:42,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 2.069620253164557) internal successors, (327), 158 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:39:42,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 327 transitions. [2021-06-05 04:39:42,892 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 327 transitions. Word has length 20 [2021-06-05 04:39:42,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:39:42,892 INFO L482 AbstractCegarLoop]: Abstraction has 159 states and 327 transitions. [2021-06-05 04:39:42,892 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 04:39:42,892 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 327 transitions. [2021-06-05 04:39:42,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:39:42,892 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:39:42,892 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:39:43,092 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3180,604 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:39:43,093 INFO L430 AbstractCegarLoop]: === Iteration 610 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:39:43,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:39:43,093 INFO L82 PathProgramCache]: Analyzing trace with hash 651973878, now seen corresponding path program 604 times [2021-06-05 04:39:43,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:39:43,093 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240803924] [2021-06-05 04:39:43,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:39:43,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:39:43,277 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 04:39:43,277 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:39:43,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240803924] [2021-06-05 04:39:43,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240803924] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:39:43,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779878176] [2021-06-05 04:39:43,277 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 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 04:39:43,302 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:39:43,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:39:43,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:39:43,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:39:43,549 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:43,550 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:43,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 04:39:43,551 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:43,553 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:43,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 04:39:43,554 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:43,575 INFO L628 ElimStorePlain]: treesize reduction 34, result has 42.4 percent of original size [2021-06-05 04:39:43,577 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:43,577 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 10 treesize of output 6 [2021-06-05 04:39:43,579 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:39:43,585 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:39:43,586 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 04:39:43,586 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:83, output treesize:14 [2021-06-05 04:39:43,624 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 04:39:43,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1779878176] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:39:43,624 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:39:43,624 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-06-05 04:39:43,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605684825] [2021-06-05 04:39:43,625 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 04:39:43,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:39:43,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 04:39:43,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=450, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:39:43,625 INFO L87 Difference]: Start difference. First operand 159 states and 327 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:39:44,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:39:44,092 INFO L93 Difference]: Finished difference Result 180 states and 364 transitions. [2021-06-05 04:39:44,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:39:44,092 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:39:44,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:39:44,092 INFO L225 Difference]: With dead ends: 180 [2021-06-05 04:39:44,092 INFO L226 Difference]: Without dead ends: 167 [2021-06-05 04:39:44,092 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 530.4ms TimeCoverageRelationStatistics Valid=83, Invalid=673, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:39:44,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-06-05 04:39:44,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 160. [2021-06-05 04:39:44,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 2.069182389937107) internal successors, (329), 159 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:39:44,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 329 transitions. [2021-06-05 04:39:44,094 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 329 transitions. Word has length 20 [2021-06-05 04:39:44,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:39:44,094 INFO L482 AbstractCegarLoop]: Abstraction has 160 states and 329 transitions. [2021-06-05 04:39:44,094 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:39:44,094 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 329 transitions. [2021-06-05 04:39:44,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:39:44,094 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:39:44,094 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:39:44,294 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 605 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3184 [2021-06-05 04:39:44,294 INFO L430 AbstractCegarLoop]: === Iteration 611 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:39:44,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:39:44,295 INFO L82 PathProgramCache]: Analyzing trace with hash 1788159150, now seen corresponding path program 605 times [2021-06-05 04:39:44,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:39:44,295 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590869868] [2021-06-05 04:39:44,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:39:44,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:39:44,490 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 04:39:44,490 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:39:44,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590869868] [2021-06-05 04:39:44,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590869868] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:39:44,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360925612] [2021-06-05 04:39:44,490 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 606 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 606 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:39:44,524 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:39:44,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:39:44,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:39:44,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:39:44,736 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:44,737 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:44,737 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 19 treesize of output 15 [2021-06-05 04:39:44,737 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:44,740 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:44,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:39:44,741 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:44,804 INFO L628 ElimStorePlain]: treesize reduction 88, result has 46.0 percent of original size [2021-06-05 04:39:44,806 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:44,807 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 13 treesize of output 9 [2021-06-05 04:39:44,808 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:39:44,832 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:39:44,834 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:44,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:39:44,835 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:44,857 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:39:44,859 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:44,860 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 10 treesize of output 6 [2021-06-05 04:39:44,861 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:39:44,882 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:39:44,883 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 04:39:44,883 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-06-05 04:39:44,966 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:39:44,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [360925612] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:39:44,967 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:39:44,967 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 04:39:44,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926684839] [2021-06-05 04:39:44,967 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 04:39:44,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:39:44,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 04:39:44,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=490, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:39:44,967 INFO L87 Difference]: Start difference. First operand 160 states and 329 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:39:45,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:39:45,332 INFO L93 Difference]: Finished difference Result 201 states and 395 transitions. [2021-06-05 04:39:45,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:39:45,333 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 04:39:45,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:39:45,333 INFO L225 Difference]: With dead ends: 201 [2021-06-05 04:39:45,333 INFO L226 Difference]: Without dead ends: 182 [2021-06-05 04:39:45,333 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 540.3ms TimeCoverageRelationStatistics Valid=92, Invalid=720, Unknown=0, NotChecked=0, Total=812 [2021-06-05 04:39:45,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2021-06-05 04:39:45,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 156. [2021-06-05 04:39:45,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 2.0709677419354837) internal successors, (321), 155 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:39:45,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 321 transitions. [2021-06-05 04:39:45,335 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 321 transitions. Word has length 20 [2021-06-05 04:39:45,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:39:45,335 INFO L482 AbstractCegarLoop]: Abstraction has 156 states and 321 transitions. [2021-06-05 04:39:45,335 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 04:39:45,335 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 321 transitions. [2021-06-05 04:39:45,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:39:45,335 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:39:45,335 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:39:45,535 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 606 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3188 [2021-06-05 04:39:45,535 INFO L430 AbstractCegarLoop]: === Iteration 612 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:39:45,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:39:45,536 INFO L82 PathProgramCache]: Analyzing trace with hash 1746467574, now seen corresponding path program 606 times [2021-06-05 04:39:45,536 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:39:45,536 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739871962] [2021-06-05 04:39:45,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:39:45,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:39:45,737 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 04:39:45,737 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:39:45,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739871962] [2021-06-05 04:39:45,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739871962] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:39:45,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858218854] [2021-06-05 04:39:45,737 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 607 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 607 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:39:45,763 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:39:45,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:39:45,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 04:39:45,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:39:45,968 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:45,969 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 19 treesize of output 15 [2021-06-05 04:39:45,969 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:45,975 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:39:45,977 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:45,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:39:45,978 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:39:45,984 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:39:45,985 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 04:39:45,985 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:32, output treesize:13 [2021-06-05 04:39:46,022 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 04:39:46,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1858218854] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:39:46,023 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:39:46,023 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-06-05 04:39:46,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471869725] [2021-06-05 04:39:46,023 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 04:39:46,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:39:46,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 04:39:46,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:39:46,023 INFO L87 Difference]: Start difference. First operand 156 states and 321 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:39:46,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:39:46,254 INFO L93 Difference]: Finished difference Result 180 states and 362 transitions. [2021-06-05 04:39:46,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:39:46,254 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:39:46,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:39:46,254 INFO L225 Difference]: With dead ends: 180 [2021-06-05 04:39:46,254 INFO L226 Difference]: Without dead ends: 173 [2021-06-05 04:39:46,254 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 411.1ms TimeCoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:39:46,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-06-05 04:39:46,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 159. [2021-06-05 04:39:46,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 2.0759493670886076) internal successors, (328), 158 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:39:46,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 328 transitions. [2021-06-05 04:39:46,256 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 328 transitions. Word has length 20 [2021-06-05 04:39:46,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:39:46,256 INFO L482 AbstractCegarLoop]: Abstraction has 159 states and 328 transitions. [2021-06-05 04:39:46,256 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:39:46,256 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 328 transitions. [2021-06-05 04:39:46,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:39:46,256 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:39:46,256 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:39:46,456 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 607 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3193 [2021-06-05 04:39:46,456 INFO L430 AbstractCegarLoop]: === Iteration 613 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:39:46,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:39:46,457 INFO L82 PathProgramCache]: Analyzing trace with hash -1596146514, now seen corresponding path program 607 times [2021-06-05 04:39:46,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:39:46,457 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763781554] [2021-06-05 04:39:46,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:39:46,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:39:46,701 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 04:39:46,702 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:39:46,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763781554] [2021-06-05 04:39:46,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763781554] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:39:46,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409138283] [2021-06-05 04:39:46,702 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 608 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 608 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:39:46,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:39:46,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:39:46,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:39:46,943 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:46,943 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:46,944 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 19 treesize of output 15 [2021-06-05 04:39:46,944 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:46,946 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:46,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:39:46,947 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:46,969 INFO L628 ElimStorePlain]: treesize reduction 34, result has 42.4 percent of original size [2021-06-05 04:39:46,971 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:46,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:39:46,973 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:39:46,980 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:39:46,981 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:39:46,981 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:75, output treesize:14 [2021-06-05 04:39:47,024 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:39:47,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [409138283] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:39:47,024 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:39:47,024 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 04:39:47,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986718737] [2021-06-05 04:39:47,024 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 04:39:47,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:39:47,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 04:39:47,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=490, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:39:47,025 INFO L87 Difference]: Start difference. First operand 159 states and 328 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:39:47,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:39:47,382 INFO L93 Difference]: Finished difference Result 186 states and 371 transitions. [2021-06-05 04:39:47,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:39:47,382 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 04:39:47,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:39:47,382 INFO L225 Difference]: With dead ends: 186 [2021-06-05 04:39:47,382 INFO L226 Difference]: Without dead ends: 170 [2021-06-05 04:39:47,383 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 538.5ms TimeCoverageRelationStatistics Valid=82, Invalid=674, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:39:47,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-06-05 04:39:47,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 160. [2021-06-05 04:39:47,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 2.0754716981132075) internal successors, (330), 159 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:39:47,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 330 transitions. [2021-06-05 04:39:47,384 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 330 transitions. Word has length 20 [2021-06-05 04:39:47,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:39:47,384 INFO L482 AbstractCegarLoop]: Abstraction has 160 states and 330 transitions. [2021-06-05 04:39:47,384 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 04:39:47,384 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 330 transitions. [2021-06-05 04:39:47,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:39:47,384 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:39:47,384 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:39:47,584 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 608 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3196 [2021-06-05 04:39:47,585 INFO L430 AbstractCegarLoop]: === Iteration 614 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:39:47,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:39:47,585 INFO L82 PathProgramCache]: Analyzing trace with hash -734141450, now seen corresponding path program 608 times [2021-06-05 04:39:47,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:39:47,585 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147814191] [2021-06-05 04:39:47,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:39:47,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:39:47,780 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 04:39:47,780 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:39:47,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147814191] [2021-06-05 04:39:47,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147814191] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:39:47,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975841449] [2021-06-05 04:39:47,780 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 609 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 609 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:39:47,805 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:39:47,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:39:47,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:39:47,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:39:48,048 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:48,048 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:48,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:39:48,049 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:48,051 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:48,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:39:48,052 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:48,072 INFO L628 ElimStorePlain]: treesize reduction 34, result has 45.2 percent of original size [2021-06-05 04:39:48,074 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:48,074 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 13 treesize of output 9 [2021-06-05 04:39:48,076 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:39:48,082 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:39:48,083 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 04:39:48,083 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:75, output treesize:14 [2021-06-05 04:39:48,127 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 04:39:48,127 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [975841449] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:39:48,127 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:39:48,127 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 04:39:48,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735667075] [2021-06-05 04:39:48,128 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 04:39:48,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:39:48,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 04:39:48,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=491, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:39:48,128 INFO L87 Difference]: Start difference. First operand 160 states and 330 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:39:48,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:39:48,715 INFO L93 Difference]: Finished difference Result 196 states and 393 transitions. [2021-06-05 04:39:48,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 04:39:48,716 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:39:48,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:39:48,716 INFO L225 Difference]: With dead ends: 196 [2021-06-05 04:39:48,716 INFO L226 Difference]: Without dead ends: 183 [2021-06-05 04:39:48,716 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 598.9ms TimeCoverageRelationStatistics Valid=98, Invalid=832, Unknown=0, NotChecked=0, Total=930 [2021-06-05 04:39:48,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-06-05 04:39:48,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 161. [2021-06-05 04:39:48,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 2.075) internal successors, (332), 160 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:39:48,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 332 transitions. [2021-06-05 04:39:48,717 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 332 transitions. Word has length 20 [2021-06-05 04:39:48,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:39:48,717 INFO L482 AbstractCegarLoop]: Abstraction has 161 states and 332 transitions. [2021-06-05 04:39:48,717 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 04:39:48,718 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 332 transitions. [2021-06-05 04:39:48,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:39:48,718 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:39:48,718 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:39:48,918 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 609 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3199 [2021-06-05 04:39:48,918 INFO L430 AbstractCegarLoop]: === Iteration 615 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:39:48,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:39:48,918 INFO L82 PathProgramCache]: Analyzing trace with hash 402043822, now seen corresponding path program 609 times [2021-06-05 04:39:48,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:39:48,918 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391186087] [2021-06-05 04:39:48,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:39:48,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:39:49,095 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:39:49,095 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:39:49,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391186087] [2021-06-05 04:39:49,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391186087] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:39:49,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336568270] [2021-06-05 04:39:49,095 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 610 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 610 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:39:49,122 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:39:49,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:39:49,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:39:49,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:39:49,329 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:49,329 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:49,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:39:49,330 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:49,333 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:49,333 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 19 treesize of output 15 [2021-06-05 04:39:49,333 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:49,394 INFO L628 ElimStorePlain]: treesize reduction 85, result has 46.9 percent of original size [2021-06-05 04:39:49,396 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:49,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:39:49,397 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:49,419 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:39:49,421 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:49,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:39:49,422 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:39:49,444 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:39:49,447 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:49,447 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 13 treesize of output 9 [2021-06-05 04:39:49,448 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:39:49,469 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:39:49,470 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 04:39:49,470 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-06-05 04:39:49,551 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 04:39:49,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [336568270] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:39:49,551 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:39:49,551 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-06-05 04:39:49,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77420487] [2021-06-05 04:39:49,551 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 04:39:49,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:39:49,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 04:39:49,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=448, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:39:49,551 INFO L87 Difference]: Start difference. First operand 161 states and 332 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:39:50,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:39:50,036 INFO L93 Difference]: Finished difference Result 196 states and 391 transitions. [2021-06-05 04:39:50,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 04:39:50,036 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:39:50,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:39:50,037 INFO L225 Difference]: With dead ends: 196 [2021-06-05 04:39:50,037 INFO L226 Difference]: Without dead ends: 184 [2021-06-05 04:39:50,037 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 575.2ms TimeCoverageRelationStatistics Valid=97, Invalid=773, Unknown=0, NotChecked=0, Total=870 [2021-06-05 04:39:50,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-06-05 04:39:50,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 159. [2021-06-05 04:39:50,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 2.0759493670886076) internal successors, (328), 158 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:39:50,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 328 transitions. [2021-06-05 04:39:50,038 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 328 transitions. Word has length 20 [2021-06-05 04:39:50,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:39:50,038 INFO L482 AbstractCegarLoop]: Abstraction has 159 states and 328 transitions. [2021-06-05 04:39:50,038 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:39:50,038 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 328 transitions. [2021-06-05 04:39:50,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:39:50,038 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:39:50,038 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:39:50,239 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3203,610 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:39:50,239 INFO L430 AbstractCegarLoop]: === Iteration 616 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:39:50,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:39:50,239 INFO L82 PathProgramCache]: Analyzing trace with hash 1813022502, now seen corresponding path program 610 times [2021-06-05 04:39:50,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:39:50,239 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999623161] [2021-06-05 04:39:50,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:39:50,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:39:50,432 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:39:50,432 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:39:50,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999623161] [2021-06-05 04:39:50,432 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999623161] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:39:50,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344405909] [2021-06-05 04:39:50,432 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 611 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 611 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:39:50,457 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:39:50,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:39:50,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:39:50,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:39:50,645 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:50,646 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:50,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:39:50,647 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:50,649 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:50,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:39:50,650 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:50,672 INFO L628 ElimStorePlain]: treesize reduction 34, result has 42.4 percent of original size [2021-06-05 04:39:50,673 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:50,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:39:50,675 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:39:50,681 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:39:50,682 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 04:39:50,682 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:75, output treesize:14 [2021-06-05 04:39:50,723 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 04:39:50,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [344405909] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:39:50,723 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:39:50,723 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 04:39:50,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239105471] [2021-06-05 04:39:50,723 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 04:39:50,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:39:50,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 04:39:50,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:39:50,724 INFO L87 Difference]: Start difference. First operand 159 states and 328 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:39:50,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:39:50,995 INFO L93 Difference]: Finished difference Result 182 states and 365 transitions. [2021-06-05 04:39:50,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:39:50,995 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 04:39:50,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:39:50,995 INFO L225 Difference]: With dead ends: 182 [2021-06-05 04:39:50,995 INFO L226 Difference]: Without dead ends: 166 [2021-06-05 04:39:50,995 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 463.5ms TimeCoverageRelationStatistics Valid=86, Invalid=670, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:39:50,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-06-05 04:39:50,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 161. [2021-06-05 04:39:50,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 2.075) internal successors, (332), 160 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:39:50,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 332 transitions. [2021-06-05 04:39:50,996 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 332 transitions. Word has length 20 [2021-06-05 04:39:50,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:39:50,997 INFO L482 AbstractCegarLoop]: Abstraction has 161 states and 332 transitions. [2021-06-05 04:39:50,997 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 04:39:50,997 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 332 transitions. [2021-06-05 04:39:50,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:39:50,997 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:39:50,997 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:39:51,197 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 611 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3208 [2021-06-05 04:39:51,197 INFO L430 AbstractCegarLoop]: === Iteration 617 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:39:51,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:39:51,197 INFO L82 PathProgramCache]: Analyzing trace with hash -1619939730, now seen corresponding path program 611 times [2021-06-05 04:39:51,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:39:51,198 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003607096] [2021-06-05 04:39:51,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:39:51,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:39:51,396 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:39:51,396 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:39:51,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003607096] [2021-06-05 04:39:51,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003607096] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:39:51,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213099166] [2021-06-05 04:39:51,396 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 612 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 612 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:39:51,422 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:39:51,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:39:51,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:39:51,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:39:51,636 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:51,636 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:51,636 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 27 treesize of output 21 [2021-06-05 04:39:51,637 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:51,639 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:51,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 04:39:51,640 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:51,661 INFO L628 ElimStorePlain]: treesize reduction 40, result has 38.5 percent of original size [2021-06-05 04:39:51,662 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:51,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:39:51,664 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:39:51,670 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:39:51,671 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 04:39:51,671 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:83, output treesize:14 [2021-06-05 04:39:51,709 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 04:39:51,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1213099166] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:39:51,709 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:39:51,709 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-06-05 04:39:51,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256063463] [2021-06-05 04:39:51,709 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 04:39:51,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:39:51,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 04:39:51,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:39:51,709 INFO L87 Difference]: Start difference. First operand 161 states and 332 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:39:52,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:39:52,263 INFO L93 Difference]: Finished difference Result 185 states and 375 transitions. [2021-06-05 04:39:52,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 04:39:52,263 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:39:52,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:39:52,263 INFO L225 Difference]: With dead ends: 185 [2021-06-05 04:39:52,263 INFO L226 Difference]: Without dead ends: 172 [2021-06-05 04:39:52,263 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 630.0ms TimeCoverageRelationStatistics Valid=112, Invalid=880, Unknown=0, NotChecked=0, Total=992 [2021-06-05 04:39:52,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-06-05 04:39:52,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 162. [2021-06-05 04:39:52,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 161 states have (on average 2.0745341614906834) internal successors, (334), 161 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:39:52,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 334 transitions. [2021-06-05 04:39:52,265 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 334 transitions. Word has length 20 [2021-06-05 04:39:52,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:39:52,265 INFO L482 AbstractCegarLoop]: Abstraction has 162 states and 334 transitions. [2021-06-05 04:39:52,265 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:39:52,265 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 334 transitions. [2021-06-05 04:39:52,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:39:52,265 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:39:52,265 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:39:52,465 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 612 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3212 [2021-06-05 04:39:52,465 INFO L430 AbstractCegarLoop]: === Iteration 618 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:39:52,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:39:52,466 INFO L82 PathProgramCache]: Analyzing trace with hash -483754458, now seen corresponding path program 612 times [2021-06-05 04:39:52,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:39:52,466 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406808154] [2021-06-05 04:39:52,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:39:52,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:39:52,692 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:39:52,693 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:39:52,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406808154] [2021-06-05 04:39:52,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406808154] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:39:52,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411399204] [2021-06-05 04:39:52,693 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 613 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 613 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:39:52,719 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:39:52,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:39:52,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 04:39:52,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:39:52,892 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:52,893 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 19 treesize of output 15 [2021-06-05 04:39:52,893 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:52,915 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:39:52,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:52,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 04:39:52,919 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:39:52,941 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:39:52,943 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:52,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:39:52,944 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:52,964 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:39:52,966 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:52,966 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 13 treesize of output 9 [2021-06-05 04:39:52,968 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:39:52,986 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:39:52,987 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:39:52,987 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:77, output treesize:35 [2021-06-05 04:39:53,064 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:39:53,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1411399204] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:39:53,065 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:39:53,065 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 04:39:53,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100911235] [2021-06-05 04:39:53,065 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 04:39:53,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:39:53,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 04:39:53,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:39:53,065 INFO L87 Difference]: Start difference. First operand 162 states and 334 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:39:53,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:39:53,608 INFO L93 Difference]: Finished difference Result 185 states and 378 transitions. [2021-06-05 04:39:53,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 04:39:53,608 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 04:39:53,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:39:53,608 INFO L225 Difference]: With dead ends: 185 [2021-06-05 04:39:53,608 INFO L226 Difference]: Without dead ends: 178 [2021-06-05 04:39:53,609 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 670.6ms TimeCoverageRelationStatistics Valid=120, Invalid=936, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 04:39:53,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-06-05 04:39:53,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 161. [2021-06-05 04:39:53,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 2.075) internal successors, (332), 160 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:39:53,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 332 transitions. [2021-06-05 04:39:53,610 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 332 transitions. Word has length 20 [2021-06-05 04:39:53,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:39:53,610 INFO L482 AbstractCegarLoop]: Abstraction has 161 states and 332 transitions. [2021-06-05 04:39:53,610 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 04:39:53,610 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 332 transitions. [2021-06-05 04:39:53,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:39:53,610 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:39:53,610 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:39:53,811 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3215,613 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:39:53,811 INFO L430 AbstractCegarLoop]: === Iteration 619 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:39:53,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:39:53,811 INFO L82 PathProgramCache]: Analyzing trace with hash -725542874, now seen corresponding path program 613 times [2021-06-05 04:39:53,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:39:53,811 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635958570] [2021-06-05 04:39:53,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:39:53,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:39:53,988 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 04:39:53,988 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:39:53,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635958570] [2021-06-05 04:39:53,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635958570] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:39:53,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633333008] [2021-06-05 04:39:53,989 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 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 04:39:54,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:39:54,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:39:54,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:39:54,206 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:54,206 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:54,207 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 27 treesize of output 21 [2021-06-05 04:39:54,208 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:54,210 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:54,210 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 27 treesize of output 21 [2021-06-05 04:39:54,211 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:54,232 INFO L628 ElimStorePlain]: treesize reduction 40, result has 38.5 percent of original size [2021-06-05 04:39:54,234 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:54,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:39:54,236 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:39:54,245 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:39:54,246 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 04:39:54,247 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:83, output treesize:14 [2021-06-05 04:39:54,300 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 04:39:54,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [633333008] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:39:54,300 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:39:54,300 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 04:39:54,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215825105] [2021-06-05 04:39:54,301 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 04:39:54,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:39:54,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 04:39:54,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:39:54,301 INFO L87 Difference]: Start difference. First operand 161 states and 332 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:39:54,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:39:54,634 INFO L93 Difference]: Finished difference Result 183 states and 367 transitions. [2021-06-05 04:39:54,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:39:54,634 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 04:39:54,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:39:54,635 INFO L225 Difference]: With dead ends: 183 [2021-06-05 04:39:54,635 INFO L226 Difference]: Without dead ends: 167 [2021-06-05 04:39:54,635 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 417.7ms TimeCoverageRelationStatistics Valid=79, Invalid=623, Unknown=0, NotChecked=0, Total=702 [2021-06-05 04:39:54,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-06-05 04:39:54,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 164. [2021-06-05 04:39:54,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 2.0736196319018405) internal successors, (338), 163 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:39:54,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 338 transitions. [2021-06-05 04:39:54,636 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 338 transitions. Word has length 20 [2021-06-05 04:39:54,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:39:54,636 INFO L482 AbstractCegarLoop]: Abstraction has 164 states and 338 transitions. [2021-06-05 04:39:54,636 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 04:39:54,636 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 338 transitions. [2021-06-05 04:39:54,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:39:54,636 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:39:54,636 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:39:54,837 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3220,614 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:39:54,837 INFO L430 AbstractCegarLoop]: === Iteration 620 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:39:54,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:39:54,837 INFO L82 PathProgramCache]: Analyzing trace with hash 136462190, now seen corresponding path program 614 times [2021-06-05 04:39:54,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:39:54,837 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665645791] [2021-06-05 04:39:54,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:39:54,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:39:55,020 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:39:55,020 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:39:55,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665645791] [2021-06-05 04:39:55,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665645791] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:39:55,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934178900] [2021-06-05 04:39:55,020 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 615 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 615 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:39:55,045 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:39:55,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:39:55,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:39:55,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:39:55,260 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:55,261 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:55,261 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 19 treesize of output 15 [2021-06-05 04:39:55,262 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:55,270 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:55,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:39:55,271 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:55,298 INFO L628 ElimStorePlain]: treesize reduction 34, result has 42.4 percent of original size [2021-06-05 04:39:55,301 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:55,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:39:55,302 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:39:55,310 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:39:55,311 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 04:39:55,312 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:75, output treesize:14 [2021-06-05 04:39:55,364 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 04:39:55,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [934178900] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:39:55,364 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:39:55,364 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 04:39:55,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750440444] [2021-06-05 04:39:55,364 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 04:39:55,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:39:55,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 04:39:55,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:39:55,365 INFO L87 Difference]: Start difference. First operand 164 states and 338 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:39:55,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:39:55,779 INFO L93 Difference]: Finished difference Result 186 states and 377 transitions. [2021-06-05 04:39:55,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 04:39:55,780 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 04:39:55,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:39:55,780 INFO L225 Difference]: With dead ends: 186 [2021-06-05 04:39:55,780 INFO L226 Difference]: Without dead ends: 173 [2021-06-05 04:39:55,780 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 558.3ms TimeCoverageRelationStatistics Valid=102, Invalid=828, Unknown=0, NotChecked=0, Total=930 [2021-06-05 04:39:55,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-06-05 04:39:55,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 165. [2021-06-05 04:39:55,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 2.073170731707317) internal successors, (340), 164 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:39:55,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 340 transitions. [2021-06-05 04:39:55,781 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 340 transitions. Word has length 20 [2021-06-05 04:39:55,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:39:55,782 INFO L482 AbstractCegarLoop]: Abstraction has 165 states and 340 transitions. [2021-06-05 04:39:55,782 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 04:39:55,782 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 340 transitions. [2021-06-05 04:39:55,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:39:55,782 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:39:55,782 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:39:55,982 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3224,615 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:39:55,982 INFO L430 AbstractCegarLoop]: === Iteration 621 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:39:55,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:39:55,983 INFO L82 PathProgramCache]: Analyzing trace with hash 1272647462, now seen corresponding path program 615 times [2021-06-05 04:39:55,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:39:55,983 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790819635] [2021-06-05 04:39:55,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:39:55,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:39:56,204 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 04:39:56,204 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:39:56,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790819635] [2021-06-05 04:39:56,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790819635] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:39:56,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353736383] [2021-06-05 04:39:56,204 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 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 04:39:56,231 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 04:39:56,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:39:56,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:39:56,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:39:56,415 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:56,415 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:56,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:39:56,416 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:56,419 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:56,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:39:56,420 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:56,482 INFO L628 ElimStorePlain]: treesize reduction 88, result has 46.0 percent of original size [2021-06-05 04:39:56,484 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:56,485 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 19 treesize of output 15 [2021-06-05 04:39:56,491 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:56,513 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:39:56,515 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:56,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:39:56,517 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:39:56,538 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:39:56,541 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:56,541 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 13 treesize of output 9 [2021-06-05 04:39:56,542 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:39:56,563 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:39:56,564 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 04:39:56,564 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-06-05 04:39:56,653 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:39:56,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1353736383] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:39:56,653 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:39:56,653 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 04:39:56,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59673406] [2021-06-05 04:39:56,654 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 04:39:56,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:39:56,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 04:39:56,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:39:56,654 INFO L87 Difference]: Start difference. First operand 165 states and 340 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:39:57,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:39:57,234 INFO L93 Difference]: Finished difference Result 209 states and 412 transitions. [2021-06-05 04:39:57,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 04:39:57,234 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 04:39:57,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:39:57,234 INFO L225 Difference]: With dead ends: 209 [2021-06-05 04:39:57,234 INFO L226 Difference]: Without dead ends: 190 [2021-06-05 04:39:57,234 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 711.0ms TimeCoverageRelationStatistics Valid=120, Invalid=936, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 04:39:57,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-06-05 04:39:57,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 163. [2021-06-05 04:39:57,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 162 states have (on average 2.074074074074074) internal successors, (336), 162 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:39:57,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 336 transitions. [2021-06-05 04:39:57,236 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 336 transitions. Word has length 20 [2021-06-05 04:39:57,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:39:57,236 INFO L482 AbstractCegarLoop]: Abstraction has 163 states and 336 transitions. [2021-06-05 04:39:57,236 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 04:39:57,236 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 336 transitions. [2021-06-05 04:39:57,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:39:57,236 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:39:57,236 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:39:57,436 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3228,616 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:39:57,437 INFO L430 AbstractCegarLoop]: === Iteration 622 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:39:57,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:39:57,437 INFO L82 PathProgramCache]: Analyzing trace with hash -1970321930, now seen corresponding path program 616 times [2021-06-05 04:39:57,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:39:57,437 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81374998] [2021-06-05 04:39:57,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:39:57,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:39:57,596 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:39:57,596 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:39:57,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81374998] [2021-06-05 04:39:57,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81374998] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:39:57,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557404954] [2021-06-05 04:39:57,597 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 617 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 617 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:39:57,622 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:39:57,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:39:57,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:39:57,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:39:57,796 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:57,797 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:57,797 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 27 treesize of output 21 [2021-06-05 04:39:57,798 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:57,800 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:57,800 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 27 treesize of output 21 [2021-06-05 04:39:57,801 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:57,823 INFO L628 ElimStorePlain]: treesize reduction 34, result has 42.4 percent of original size [2021-06-05 04:39:57,824 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:57,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:39:57,826 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:39:57,833 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:39:57,833 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 04:39:57,834 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:83, output treesize:14 [2021-06-05 04:39:57,874 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:39:57,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1557404954] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:39:57,875 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:39:57,875 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 04:39:57,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297806821] [2021-06-05 04:39:57,875 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 04:39:57,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:39:57,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 04:39:57,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:39:57,875 INFO L87 Difference]: Start difference. First operand 163 states and 336 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:39:58,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:39:58,278 INFO L93 Difference]: Finished difference Result 186 states and 377 transitions. [2021-06-05 04:39:58,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 04:39:58,278 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 04:39:58,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:39:58,278 INFO L225 Difference]: With dead ends: 186 [2021-06-05 04:39:58,279 INFO L226 Difference]: Without dead ends: 173 [2021-06-05 04:39:58,279 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 499.2ms TimeCoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-06-05 04:39:58,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-06-05 04:39:58,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 165. [2021-06-05 04:39:58,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 2.073170731707317) internal successors, (340), 164 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:39:58,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 340 transitions. [2021-06-05 04:39:58,280 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 340 transitions. Word has length 20 [2021-06-05 04:39:58,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:39:58,280 INFO L482 AbstractCegarLoop]: Abstraction has 165 states and 340 transitions. [2021-06-05 04:39:58,280 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 04:39:58,280 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 340 transitions. [2021-06-05 04:39:58,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:39:58,281 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:39:58,281 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:39:58,481 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3233,617 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:39:58,481 INFO L430 AbstractCegarLoop]: === Iteration 623 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:39:58,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:39:58,481 INFO L82 PathProgramCache]: Analyzing trace with hash -834136658, now seen corresponding path program 617 times [2021-06-05 04:39:58,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:39:58,481 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476997129] [2021-06-05 04:39:58,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:39:58,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:39:58,690 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:39:58,690 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:39:58,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476997129] [2021-06-05 04:39:58,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476997129] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:39:58,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029645073] [2021-06-05 04:39:58,690 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 618 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 618 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:39:58,716 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 04:39:58,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:39:58,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:39:58,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:39:58,859 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:58,860 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:58,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:39:58,860 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:58,863 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:58,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:39:58,864 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:58,923 INFO L628 ElimStorePlain]: treesize reduction 91, result has 43.1 percent of original size [2021-06-05 04:39:58,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:39:58,926 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:58,947 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:39:58,950 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:39:58,950 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 13 treesize of output 9 [2021-06-05 04:39:58,952 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:39:58,973 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:39:58,973 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 04:39:58,974 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 04:39:58,974 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:173, output treesize:36 [2021-06-05 04:39:59,051 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 04:39:59,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1029645073] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:39:59,052 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:39:59,052 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-06-05 04:39:59,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795044479] [2021-06-05 04:39:59,052 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 04:39:59,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:39:59,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 04:39:59,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:39:59,052 INFO L87 Difference]: Start difference. First operand 165 states and 340 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:39:59,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:39:59,580 INFO L93 Difference]: Finished difference Result 208 states and 410 transitions. [2021-06-05 04:39:59,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 04:39:59,580 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:39:59,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:39:59,581 INFO L225 Difference]: With dead ends: 208 [2021-06-05 04:39:59,581 INFO L226 Difference]: Without dead ends: 189 [2021-06-05 04:39:59,581 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 689.4ms TimeCoverageRelationStatistics Valid=132, Invalid=990, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 04:39:59,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-06-05 04:39:59,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 164. [2021-06-05 04:39:59,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 2.0736196319018405) internal successors, (338), 163 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:39:59,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 338 transitions. [2021-06-05 04:39:59,582 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 338 transitions. Word has length 20 [2021-06-05 04:39:59,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:39:59,582 INFO L482 AbstractCegarLoop]: Abstraction has 164 states and 338 transitions. [2021-06-05 04:39:59,582 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:39:59,582 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 338 transitions. [2021-06-05 04:39:59,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:39:59,583 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:39:59,583 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:39:59,783 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3236,618 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:39:59,783 INFO L430 AbstractCegarLoop]: === Iteration 624 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:39:59,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:39:59,783 INFO L82 PathProgramCache]: Analyzing trace with hash 1314659878, now seen corresponding path program 618 times [2021-06-05 04:39:59,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:39:59,783 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723631753] [2021-06-05 04:39:59,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:39:59,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:39:59,948 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:39:59,948 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:39:59,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723631753] [2021-06-05 04:39:59,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723631753] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:39:59,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918575914] [2021-06-05 04:39:59,948 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 619 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 619 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:39:59,975 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 04:39:59,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:39:59,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:39:59,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:40:00,098 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:00,098 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:00,098 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 19 treesize of output 15 [2021-06-05 04:40:00,099 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:00,102 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:00,102 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:00,102 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 19 treesize of output 15 [2021-06-05 04:40:00,103 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:00,105 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:00,106 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:00,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:40:00,106 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:00,109 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:00,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:40:00,110 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:00,162 INFO L628 ElimStorePlain]: treesize reduction 77, result has 46.5 percent of original size [2021-06-05 04:40:00,165 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:00,165 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:00,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 04:40:00,166 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:40:00,169 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:00,169 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 10 treesize of output 6 [2021-06-05 04:40:00,170 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:40:00,192 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:40:00,193 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 04:40:00,194 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:173, output treesize:38 [2021-06-05 04:40:00,271 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 04:40:00,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [918575914] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:00,271 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:40:00,271 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 04:40:00,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388252920] [2021-06-05 04:40:00,272 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 04:40:00,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:40:00,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 04:40:00,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:40:00,272 INFO L87 Difference]: Start difference. First operand 164 states and 338 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:40:00,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:40:00,698 INFO L93 Difference]: Finished difference Result 192 states and 392 transitions. [2021-06-05 04:40:00,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 04:40:00,699 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 04:40:00,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:40:00,699 INFO L225 Difference]: With dead ends: 192 [2021-06-05 04:40:00,699 INFO L226 Difference]: Without dead ends: 180 [2021-06-05 04:40:00,699 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 533.0ms TimeCoverageRelationStatistics Valid=117, Invalid=813, Unknown=0, NotChecked=0, Total=930 [2021-06-05 04:40:00,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2021-06-05 04:40:00,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 165. [2021-06-05 04:40:00,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 2.0792682926829267) internal successors, (341), 164 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:40:00,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 341 transitions. [2021-06-05 04:40:00,700 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 341 transitions. Word has length 20 [2021-06-05 04:40:00,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:40:00,701 INFO L482 AbstractCegarLoop]: Abstraction has 165 states and 341 transitions. [2021-06-05 04:40:00,701 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 04:40:00,701 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 341 transitions. [2021-06-05 04:40:00,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:40:00,701 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:40:00,701 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:40:00,901 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 619 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3241 [2021-06-05 04:40:00,901 INFO L430 AbstractCegarLoop]: === Iteration 625 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:40:00,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:40:00,902 INFO L82 PathProgramCache]: Analyzing trace with hash -251095818, now seen corresponding path program 619 times [2021-06-05 04:40:00,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:40:00,902 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589045385] [2021-06-05 04:40:00,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:40:00,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:40:01,064 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:40:01,064 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:40:01,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589045385] [2021-06-05 04:40:01,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589045385] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:01,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661737278] [2021-06-05 04:40:01,064 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 620 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 620 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:40:01,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:40:01,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:40:01,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:40:01,273 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:01,273 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:01,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 04:40:01,274 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:01,276 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:01,277 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 27 treesize of output 21 [2021-06-05 04:40:01,277 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:01,299 INFO L628 ElimStorePlain]: treesize reduction 40, result has 38.5 percent of original size [2021-06-05 04:40:01,300 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:01,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:40:01,302 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:40:01,309 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:40:01,310 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:40:01,310 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:83, output treesize:14 [2021-06-05 04:40:01,351 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 04:40:01,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [661737278] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:01,351 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:40:01,352 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 04:40:01,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730143299] [2021-06-05 04:40:01,352 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 04:40:01,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:40:01,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 04:40:01,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:40:01,352 INFO L87 Difference]: Start difference. First operand 165 states and 341 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:40:01,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:40:01,736 INFO L93 Difference]: Finished difference Result 191 states and 388 transitions. [2021-06-05 04:40:01,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 04:40:01,736 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 04:40:01,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:40:01,736 INFO L225 Difference]: With dead ends: 191 [2021-06-05 04:40:01,736 INFO L226 Difference]: Without dead ends: 178 [2021-06-05 04:40:01,737 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 455.4ms TimeCoverageRelationStatistics Valid=96, Invalid=774, Unknown=0, NotChecked=0, Total=870 [2021-06-05 04:40:01,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-06-05 04:40:01,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 171. [2021-06-05 04:40:01,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 2.0764705882352943) internal successors, (353), 170 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:40:01,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 353 transitions. [2021-06-05 04:40:01,738 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 353 transitions. Word has length 20 [2021-06-05 04:40:01,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:40:01,738 INFO L482 AbstractCegarLoop]: Abstraction has 171 states and 353 transitions. [2021-06-05 04:40:01,738 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 04:40:01,738 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 353 transitions. [2021-06-05 04:40:01,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:40:01,738 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:40:01,738 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:40:01,939 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3244,620 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:40:01,939 INFO L430 AbstractCegarLoop]: === Iteration 626 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:40:01,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:40:01,939 INFO L82 PathProgramCache]: Analyzing trace with hash 885089454, now seen corresponding path program 620 times [2021-06-05 04:40:01,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:40:01,939 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303545601] [2021-06-05 04:40:01,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:40:01,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:40:02,105 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 04:40:02,105 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:40:02,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303545601] [2021-06-05 04:40:02,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303545601] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:02,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195482992] [2021-06-05 04:40:02,105 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 621 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 621 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:40:02,130 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:40:02,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:40:02,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:40:02,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:40:02,277 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:02,278 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:02,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:40:02,283 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:02,286 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:02,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:40:02,287 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:02,350 INFO L628 ElimStorePlain]: treesize reduction 88, result has 46.0 percent of original size [2021-06-05 04:40:02,352 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:02,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 04:40:02,354 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:40:02,378 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:40:02,381 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:02,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:40:02,382 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:02,404 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:40:02,406 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:02,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:40:02,408 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:40:02,429 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:40:02,430 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:40:02,430 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-06-05 04:40:02,506 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:40:02,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1195482992] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:02,506 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:40:02,506 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-06-05 04:40:02,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908351405] [2021-06-05 04:40:02,506 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 04:40:02,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:40:02,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 04:40:02,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:40:02,507 INFO L87 Difference]: Start difference. First operand 171 states and 353 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:40:02,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:40:02,927 INFO L93 Difference]: Finished difference Result 213 states and 421 transitions. [2021-06-05 04:40:02,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 04:40:02,927 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:40:02,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:40:02,928 INFO L225 Difference]: With dead ends: 213 [2021-06-05 04:40:02,928 INFO L226 Difference]: Without dead ends: 194 [2021-06-05 04:40:02,928 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 473.3ms TimeCoverageRelationStatistics Valid=104, Invalid=766, Unknown=0, NotChecked=0, Total=870 [2021-06-05 04:40:02,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2021-06-05 04:40:02,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 170. [2021-06-05 04:40:02,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 169 states have (on average 2.076923076923077) internal successors, (351), 169 states have internal predecessors, (351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:40:02,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 351 transitions. [2021-06-05 04:40:02,929 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 351 transitions. Word has length 20 [2021-06-05 04:40:02,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:40:02,929 INFO L482 AbstractCegarLoop]: Abstraction has 170 states and 351 transitions. [2021-06-05 04:40:02,929 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:40:02,930 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 351 transitions. [2021-06-05 04:40:02,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:40:02,930 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:40:02,930 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:40:03,130 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3247,621 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:40:03,130 INFO L430 AbstractCegarLoop]: === Iteration 627 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:40:03,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:40:03,130 INFO L82 PathProgramCache]: Analyzing trace with hash -1261081306, now seen corresponding path program 621 times [2021-06-05 04:40:03,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:40:03,131 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838031153] [2021-06-05 04:40:03,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:40:03,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:40:03,362 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 04:40:03,362 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:40:03,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838031153] [2021-06-05 04:40:03,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838031153] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:03,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34315592] [2021-06-05 04:40:03,363 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 622 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 622 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:40:03,389 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:40:03,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:40:03,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 04:40:03,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:40:03,521 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:03,522 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:03,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:40:03,523 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:03,525 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:03,525 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:03,526 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 19 treesize of output 15 [2021-06-05 04:40:03,526 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:03,529 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:03,529 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:03,529 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 19 treesize of output 15 [2021-06-05 04:40:03,530 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:03,532 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:03,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:40:03,533 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:03,579 INFO L628 ElimStorePlain]: treesize reduction 71, result has 46.2 percent of original size [2021-06-05 04:40:03,581 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:03,582 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:03,582 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 10 treesize of output 6 [2021-06-05 04:40:03,583 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:40:03,585 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:03,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 04:40:03,587 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:40:03,606 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:40:03,607 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:40:03,607 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:161, output treesize:32 [2021-06-05 04:40:03,685 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:40:03,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [34315592] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:03,685 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:40:03,685 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 04:40:03,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513247898] [2021-06-05 04:40:03,685 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 04:40:03,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:40:03,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 04:40:03,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:40:03,685 INFO L87 Difference]: Start difference. First operand 170 states and 351 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:40:04,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:40:04,404 INFO L93 Difference]: Finished difference Result 222 states and 444 transitions. [2021-06-05 04:40:04,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 04:40:04,405 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:40:04,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:40:04,405 INFO L225 Difference]: With dead ends: 222 [2021-06-05 04:40:04,405 INFO L226 Difference]: Without dead ends: 203 [2021-06-05 04:40:04,405 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 858.7ms TimeCoverageRelationStatistics Valid=140, Invalid=1120, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 04:40:04,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-06-05 04:40:04,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 169. [2021-06-05 04:40:04,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 168 states have (on average 2.0773809523809526) internal successors, (349), 168 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:40:04,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 349 transitions. [2021-06-05 04:40:04,407 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 349 transitions. Word has length 20 [2021-06-05 04:40:04,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:40:04,407 INFO L482 AbstractCegarLoop]: Abstraction has 169 states and 349 transitions. [2021-06-05 04:40:04,407 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:40:04,407 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 349 transitions. [2021-06-05 04:40:04,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:40:04,407 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:40:04,407 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:40:04,607 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 622 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3252 [2021-06-05 04:40:04,608 INFO L430 AbstractCegarLoop]: === Iteration 628 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:40:04,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:40:04,608 INFO L82 PathProgramCache]: Analyzing trace with hash 927101870, now seen corresponding path program 622 times [2021-06-05 04:40:04,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:40:04,608 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512242571] [2021-06-05 04:40:04,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:40:04,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:40:04,841 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 04:40:04,841 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:40:04,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512242571] [2021-06-05 04:40:04,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512242571] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:04,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270301359] [2021-06-05 04:40:04,841 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 623 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 623 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:40:04,866 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:40:04,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:40:04,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:40:04,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:40:05,019 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:05,020 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:05,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:40:05,021 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:05,024 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:05,025 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:05,025 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 19 treesize of output 15 [2021-06-05 04:40:05,025 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:05,028 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:05,028 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:05,028 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 19 treesize of output 15 [2021-06-05 04:40:05,029 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:05,031 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:05,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:40:05,032 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:05,085 INFO L628 ElimStorePlain]: treesize reduction 83, result has 44.7 percent of original size [2021-06-05 04:40:05,087 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:05,087 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:05,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:40:05,089 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:40:05,091 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:05,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 04:40:05,092 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:40:05,116 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:40:05,117 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 04:40:05,117 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:173, output treesize:38 [2021-06-05 04:40:05,205 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 04:40:05,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1270301359] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:05,206 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:40:05,206 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 04:40:05,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064644449] [2021-06-05 04:40:05,206 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 04:40:05,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:40:05,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 04:40:05,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:40:05,206 INFO L87 Difference]: Start difference. First operand 169 states and 349 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:40:06,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:40:06,306 INFO L93 Difference]: Finished difference Result 262 states and 511 transitions. [2021-06-05 04:40:06,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 04:40:06,306 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 04:40:06,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:40:06,307 INFO L225 Difference]: With dead ends: 262 [2021-06-05 04:40:06,307 INFO L226 Difference]: Without dead ends: 229 [2021-06-05 04:40:06,307 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 1124.4ms TimeCoverageRelationStatistics Valid=161, Invalid=1245, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 04:40:06,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2021-06-05 04:40:06,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 173. [2021-06-05 04:40:06,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 2.0988372093023258) internal successors, (361), 172 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:40:06,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 361 transitions. [2021-06-05 04:40:06,309 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 361 transitions. Word has length 20 [2021-06-05 04:40:06,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:40:06,309 INFO L482 AbstractCegarLoop]: Abstraction has 173 states and 361 transitions. [2021-06-05 04:40:06,309 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 04:40:06,309 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 361 transitions. [2021-06-05 04:40:06,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:40:06,310 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:40:06,310 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:40:06,510 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3255,623 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:40:06,510 INFO L430 AbstractCegarLoop]: === Iteration 629 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:40:06,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:40:06,510 INFO L82 PathProgramCache]: Analyzing trace with hash 41303590, now seen corresponding path program 623 times [2021-06-05 04:40:06,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:40:06,511 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663823627] [2021-06-05 04:40:06,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:40:06,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:40:06,730 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 04:40:06,730 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:40:06,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663823627] [2021-06-05 04:40:06,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663823627] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:06,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019934900] [2021-06-05 04:40:06,730 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 624 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 624 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:40:06,756 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:40:06,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:40:06,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:40:06,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:40:06,955 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:06,955 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:06,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:40:06,956 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:06,959 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:06,959 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:06,959 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 19 treesize of output 15 [2021-06-05 04:40:06,960 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:06,963 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:06,963 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:06,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:40:06,964 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:06,966 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:06,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:40:06,967 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:07,021 INFO L628 ElimStorePlain]: treesize reduction 83, result has 44.7 percent of original size [2021-06-05 04:40:07,024 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:07,025 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:07,028 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 10 treesize of output 6 [2021-06-05 04:40:07,034 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:40:07,037 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:07,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 04:40:07,038 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:40:07,062 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:40:07,064 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 04:40:07,064 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:173, output treesize:38 [2021-06-05 04:40:07,146 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 04:40:07,147 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2019934900] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:07,147 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:40:07,147 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-06-05 04:40:07,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805610688] [2021-06-05 04:40:07,147 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 04:40:07,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:40:07,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 04:40:07,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=447, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:40:07,147 INFO L87 Difference]: Start difference. First operand 173 states and 361 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:40:07,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:40:07,822 INFO L93 Difference]: Finished difference Result 232 states and 468 transitions. [2021-06-05 04:40:07,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 04:40:07,822 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:40:07,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:40:07,822 INFO L225 Difference]: With dead ends: 232 [2021-06-05 04:40:07,822 INFO L226 Difference]: Without dead ends: 213 [2021-06-05 04:40:07,823 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 797.2ms TimeCoverageRelationStatistics Valid=129, Invalid=1061, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 04:40:07,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2021-06-05 04:40:07,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 174. [2021-06-05 04:40:07,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 173 states have (on average 2.1040462427745665) internal successors, (364), 173 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:40:07,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 364 transitions. [2021-06-05 04:40:07,824 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 364 transitions. Word has length 20 [2021-06-05 04:40:07,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:40:07,824 INFO L482 AbstractCegarLoop]: Abstraction has 174 states and 364 transitions. [2021-06-05 04:40:07,824 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:40:07,824 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 364 transitions. [2021-06-05 04:40:07,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:40:07,824 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:40:07,824 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:40:08,025 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 624 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3258 [2021-06-05 04:40:08,025 INFO L430 AbstractCegarLoop]: === Iteration 630 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:40:08,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:40:08,025 INFO L82 PathProgramCache]: Analyzing trace with hash 502100586, now seen corresponding path program 624 times [2021-06-05 04:40:08,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:40:08,025 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962992553] [2021-06-05 04:40:08,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:40:08,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:40:08,170 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:40:08,171 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:40:08,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962992553] [2021-06-05 04:40:08,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962992553] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:08,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012280632] [2021-06-05 04:40:08,171 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 625 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 625 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:40:08,197 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:40:08,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:40:08,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 04:40:08,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:40:08,430 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:08,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 04:40:08,431 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:08,437 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:40:08,439 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:08,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 04:40:08,440 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:08,445 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:40:08,446 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:40:08,446 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:36, output treesize:13 [2021-06-05 04:40:08,485 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 04:40:08,485 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1012280632] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:08,485 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:40:08,485 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 04:40:08,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218201902] [2021-06-05 04:40:08,485 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 04:40:08,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:40:08,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 04:40:08,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:40:08,485 INFO L87 Difference]: Start difference. First operand 174 states and 364 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:40:08,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:40:08,890 INFO L93 Difference]: Finished difference Result 210 states and 434 transitions. [2021-06-05 04:40:08,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:40:08,891 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:40:08,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:40:08,891 INFO L225 Difference]: With dead ends: 210 [2021-06-05 04:40:08,891 INFO L226 Difference]: Without dead ends: 203 [2021-06-05 04:40:08,891 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 457.1ms TimeCoverageRelationStatistics Valid=85, Invalid=727, Unknown=0, NotChecked=0, Total=812 [2021-06-05 04:40:08,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-06-05 04:40:08,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 175. [2021-06-05 04:40:08,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 2.1091954022988504) internal successors, (367), 174 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:40:08,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 367 transitions. [2021-06-05 04:40:08,892 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 367 transitions. Word has length 20 [2021-06-05 04:40:08,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:40:08,892 INFO L482 AbstractCegarLoop]: Abstraction has 175 states and 367 transitions. [2021-06-05 04:40:08,893 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:40:08,893 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 367 transitions. [2021-06-05 04:40:08,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:40:08,893 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:40:08,893 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:40:09,093 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 625 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3261 [2021-06-05 04:40:09,093 INFO L430 AbstractCegarLoop]: === Iteration 631 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:40:09,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:40:09,094 INFO L82 PathProgramCache]: Analyzing trace with hash -39721038, now seen corresponding path program 625 times [2021-06-05 04:40:09,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:40:09,094 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289568916] [2021-06-05 04:40:09,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:40:09,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:40:09,244 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 04:40:09,244 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:40:09,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289568916] [2021-06-05 04:40:09,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289568916] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:09,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185913590] [2021-06-05 04:40:09,245 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 626 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 626 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:40:09,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:40:09,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:40:09,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:40:09,517 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:09,517 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:09,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:40:09,518 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:09,520 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:09,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:40:09,521 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:09,542 INFO L628 ElimStorePlain]: treesize reduction 37, result has 40.3 percent of original size [2021-06-05 04:40:09,544 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:09,544 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 10 treesize of output 6 [2021-06-05 04:40:09,545 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:40:09,552 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:40:09,553 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 04:40:09,553 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:75, output treesize:14 [2021-06-05 04:40:09,593 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 04:40:09,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1185913590] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:09,593 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:40:09,593 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 04:40:09,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944914753] [2021-06-05 04:40:09,593 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 04:40:09,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:40:09,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 04:40:09,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:40:09,594 INFO L87 Difference]: Start difference. First operand 175 states and 367 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:40:09,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:40:09,942 INFO L93 Difference]: Finished difference Result 222 states and 451 transitions. [2021-06-05 04:40:09,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:40:09,942 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:40:09,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:40:09,942 INFO L225 Difference]: With dead ends: 222 [2021-06-05 04:40:09,943 INFO L226 Difference]: Without dead ends: 203 [2021-06-05 04:40:09,943 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 464.9ms TimeCoverageRelationStatistics Valid=86, Invalid=726, Unknown=0, NotChecked=0, Total=812 [2021-06-05 04:40:09,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-06-05 04:40:09,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 176. [2021-06-05 04:40:09,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 2.1085714285714285) internal successors, (369), 175 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:40:09,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 369 transitions. [2021-06-05 04:40:09,944 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 369 transitions. Word has length 20 [2021-06-05 04:40:09,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:40:09,944 INFO L482 AbstractCegarLoop]: Abstraction has 176 states and 369 transitions. [2021-06-05 04:40:09,944 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:40:09,944 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 369 transitions. [2021-06-05 04:40:09,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:40:09,944 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:40:09,945 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:40:10,145 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 626 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3265 [2021-06-05 04:40:10,145 INFO L430 AbstractCegarLoop]: === Iteration 632 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:40:10,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:40:10,145 INFO L82 PathProgramCache]: Analyzing trace with hash 912632170, now seen corresponding path program 626 times [2021-06-05 04:40:10,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:40:10,145 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633927837] [2021-06-05 04:40:10,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:40:10,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:40:10,447 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:40:10,448 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:40:10,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633927837] [2021-06-05 04:40:10,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633927837] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:10,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445798365] [2021-06-05 04:40:10,448 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 627 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 627 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:40:10,473 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:40:10,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:40:10,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 04:40:10,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:40:10,742 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:10,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:40:10,743 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:10,749 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:40:10,751 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:10,751 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 10 treesize of output 6 [2021-06-05 04:40:10,752 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:40:10,757 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:40:10,758 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 04:40:10,758 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:32, output treesize:13 [2021-06-05 04:40:10,802 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:40:10,803 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1445798365] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:10,803 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:40:10,803 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 04:40:10,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960543601] [2021-06-05 04:40:10,803 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 04:40:10,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:40:10,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 04:40:10,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=538, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:40:10,803 INFO L87 Difference]: Start difference. First operand 176 states and 369 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:40:11,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:40:11,163 INFO L93 Difference]: Finished difference Result 205 states and 418 transitions. [2021-06-05 04:40:11,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:40:11,164 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:40:11,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:40:11,164 INFO L225 Difference]: With dead ends: 205 [2021-06-05 04:40:11,164 INFO L226 Difference]: Without dead ends: 198 [2021-06-05 04:40:11,164 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 621.5ms TimeCoverageRelationStatistics Valid=78, Invalid=678, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:40:11,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-06-05 04:40:11,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 177. [2021-06-05 04:40:11,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 176 states have (on average 2.1136363636363638) internal successors, (372), 176 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:40:11,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 372 transitions. [2021-06-05 04:40:11,166 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 372 transitions. Word has length 20 [2021-06-05 04:40:11,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:40:11,166 INFO L482 AbstractCegarLoop]: Abstraction has 177 states and 372 transitions. [2021-06-05 04:40:11,166 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:40:11,166 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 372 transitions. [2021-06-05 04:40:11,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:40:11,166 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:40:11,166 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:40:11,366 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3268,627 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:40:11,367 INFO L430 AbstractCegarLoop]: === Iteration 633 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:40:11,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:40:11,367 INFO L82 PathProgramCache]: Analyzing trace with hash 1774637234, now seen corresponding path program 627 times [2021-06-05 04:40:11,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:40:11,367 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174639948] [2021-06-05 04:40:11,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:40:11,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:40:11,570 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:40:11,570 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:40:11,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174639948] [2021-06-05 04:40:11,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174639948] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:11,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134593631] [2021-06-05 04:40:11,571 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 628 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 628 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:40:11,596 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:40:11,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:40:11,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:40:11,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:40:11,915 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:11,915 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:11,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:40:11,916 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:11,918 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:11,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:40:11,919 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:11,939 INFO L628 ElimStorePlain]: treesize reduction 37, result has 40.3 percent of original size [2021-06-05 04:40:11,941 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:11,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:40:11,942 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:40:11,948 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:40:11,949 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 04:40:11,949 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:75, output treesize:14 [2021-06-05 04:40:11,995 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:40:11,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [134593631] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:11,995 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:40:11,995 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 04:40:11,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859375098] [2021-06-05 04:40:11,995 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 04:40:11,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:40:11,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 04:40:11,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=539, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:40:11,996 INFO L87 Difference]: Start difference. First operand 177 states and 372 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:40:12,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:40:12,428 INFO L93 Difference]: Finished difference Result 213 states and 434 transitions. [2021-06-05 04:40:12,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:40:12,428 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:40:12,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:40:12,428 INFO L225 Difference]: With dead ends: 213 [2021-06-05 04:40:12,428 INFO L226 Difference]: Without dead ends: 200 [2021-06-05 04:40:12,428 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 628.0ms TimeCoverageRelationStatistics Valid=87, Invalid=783, Unknown=0, NotChecked=0, Total=870 [2021-06-05 04:40:12,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-06-05 04:40:12,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 178. [2021-06-05 04:40:12,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 2.1129943502824857) internal successors, (374), 177 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:40:12,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 374 transitions. [2021-06-05 04:40:12,430 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 374 transitions. Word has length 20 [2021-06-05 04:40:12,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:40:12,430 INFO L482 AbstractCegarLoop]: Abstraction has 178 states and 374 transitions. [2021-06-05 04:40:12,430 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:40:12,430 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 374 transitions. [2021-06-05 04:40:12,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:40:12,430 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:40:12,430 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:40:12,631 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 628 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3272 [2021-06-05 04:40:12,631 INFO L430 AbstractCegarLoop]: === Iteration 634 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:40:12,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:40:12,631 INFO L82 PathProgramCache]: Analyzing trace with hash -1384144790, now seen corresponding path program 628 times [2021-06-05 04:40:12,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:40:12,631 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014502162] [2021-06-05 04:40:12,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:40:12,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:40:12,898 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:40:12,898 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:40:12,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014502162] [2021-06-05 04:40:12,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014502162] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:12,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982092293] [2021-06-05 04:40:12,899 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 629 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 629 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:40:12,924 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:40:12,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:40:12,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:40:12,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:40:13,198 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:13,199 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:13,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:40:13,199 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:13,202 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:13,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:40:13,203 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:13,264 INFO L628 ElimStorePlain]: treesize reduction 88, result has 46.0 percent of original size [2021-06-05 04:40:13,267 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:13,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 04:40:13,269 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:40:13,293 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:40:13,295 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:13,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:40:13,296 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:13,319 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:40:13,321 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:13,321 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 10 treesize of output 6 [2021-06-05 04:40:13,323 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:40:13,344 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:40:13,345 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:40:13,345 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-06-05 04:40:13,446 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 04:40:13,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1982092293] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:13,446 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:40:13,446 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 04:40:13,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336734793] [2021-06-05 04:40:13,446 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 04:40:13,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:40:13,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 04:40:13,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=538, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:40:13,447 INFO L87 Difference]: Start difference. First operand 178 states and 374 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:40:13,993 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 70 [2021-06-05 04:40:14,191 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 71 [2021-06-05 04:40:14,527 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 71 [2021-06-05 04:40:14,892 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 61 [2021-06-05 04:40:15,188 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 52 [2021-06-05 04:40:15,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:40:15,538 INFO L93 Difference]: Finished difference Result 386 states and 706 transitions. [2021-06-05 04:40:15,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 04:40:15,538 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:40:15,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:40:15,538 INFO L225 Difference]: With dead ends: 386 [2021-06-05 04:40:15,538 INFO L226 Difference]: Without dead ends: 339 [2021-06-05 04:40:15,538 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 2176.4ms TimeCoverageRelationStatistics Valid=247, Invalid=1645, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 04:40:15,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2021-06-05 04:40:15,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 183. [2021-06-05 04:40:15,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 2.1538461538461537) internal successors, (392), 182 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:40:15,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 392 transitions. [2021-06-05 04:40:15,540 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 392 transitions. Word has length 20 [2021-06-05 04:40:15,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:40:15,540 INFO L482 AbstractCegarLoop]: Abstraction has 183 states and 392 transitions. [2021-06-05 04:40:15,540 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:40:15,540 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 392 transitions. [2021-06-05 04:40:15,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:40:15,541 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:40:15,541 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:40:15,741 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 629 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3276 [2021-06-05 04:40:15,741 INFO L430 AbstractCegarLoop]: === Iteration 635 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:40:15,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:40:15,741 INFO L82 PathProgramCache]: Analyzing trace with hash -1729663942, now seen corresponding path program 629 times [2021-06-05 04:40:15,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:40:15,741 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201029694] [2021-06-05 04:40:15,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:40:15,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:40:15,922 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 04:40:15,923 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:40:15,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201029694] [2021-06-05 04:40:15,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201029694] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:15,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210217215] [2021-06-05 04:40:15,923 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 630 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 630 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:40:15,948 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:40:15,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:40:15,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:40:15,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:40:16,168 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:16,169 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:16,169 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 27 treesize of output 21 [2021-06-05 04:40:16,170 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:16,172 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:16,172 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 27 treesize of output 21 [2021-06-05 04:40:16,173 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:16,194 INFO L628 ElimStorePlain]: treesize reduction 34, result has 42.4 percent of original size [2021-06-05 04:40:16,196 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:16,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:40:16,198 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:40:16,204 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:40:16,205 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 04:40:16,205 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:83, output treesize:14 [2021-06-05 04:40:16,249 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:40:16,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [210217215] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:16,250 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:40:16,250 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 04:40:16,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51426303] [2021-06-05 04:40:16,250 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 04:40:16,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:40:16,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 04:40:16,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:40:16,250 INFO L87 Difference]: Start difference. First operand 183 states and 392 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:40:16,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:40:16,489 INFO L93 Difference]: Finished difference Result 206 states and 428 transitions. [2021-06-05 04:40:16,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:40:16,489 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:40:16,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:40:16,490 INFO L225 Difference]: With dead ends: 206 [2021-06-05 04:40:16,490 INFO L226 Difference]: Without dead ends: 187 [2021-06-05 04:40:16,490 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 433.3ms TimeCoverageRelationStatistics Valid=74, Invalid=628, Unknown=0, NotChecked=0, Total=702 [2021-06-05 04:40:16,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-06-05 04:40:16,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 185. [2021-06-05 04:40:16,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 184 states have (on average 2.152173913043478) internal successors, (396), 184 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:40:16,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 396 transitions. [2021-06-05 04:40:16,491 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 396 transitions. Word has length 20 [2021-06-05 04:40:16,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:40:16,491 INFO L482 AbstractCegarLoop]: Abstraction has 185 states and 396 transitions. [2021-06-05 04:40:16,491 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:40:16,491 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 396 transitions. [2021-06-05 04:40:16,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:40:16,492 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:40:16,492 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:40:16,692 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3281,630 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:40:16,692 INFO L430 AbstractCegarLoop]: === Iteration 636 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:40:16,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:40:16,692 INFO L82 PathProgramCache]: Analyzing trace with hash -777310734, now seen corresponding path program 630 times [2021-06-05 04:40:16,692 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:40:16,693 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019797098] [2021-06-05 04:40:16,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:40:16,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:40:16,951 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:40:16,951 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:40:16,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019797098] [2021-06-05 04:40:16,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019797098] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:16,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785825523] [2021-06-05 04:40:16,952 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 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 04:40:16,982 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:40:16,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:40:16,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 04:40:16,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:40:17,282 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:17,282 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 27 treesize of output 21 [2021-06-05 04:40:17,283 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:17,289 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:40:17,290 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:17,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 04:40:17,291 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:17,297 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:40:17,298 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 04:40:17,298 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:36, output treesize:13 [2021-06-05 04:40:17,340 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 04:40:17,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [785825523] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:17,340 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:40:17,340 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 04:40:17,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730284652] [2021-06-05 04:40:17,340 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 04:40:17,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:40:17,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 04:40:17,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=536, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:40:17,341 INFO L87 Difference]: Start difference. First operand 185 states and 396 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:40:17,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:40:17,687 INFO L93 Difference]: Finished difference Result 204 states and 428 transitions. [2021-06-05 04:40:17,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:40:17,687 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:40:17,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:40:17,688 INFO L225 Difference]: With dead ends: 204 [2021-06-05 04:40:17,688 INFO L226 Difference]: Without dead ends: 197 [2021-06-05 04:40:17,688 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 625.2ms TimeCoverageRelationStatistics Valid=86, Invalid=726, Unknown=0, NotChecked=0, Total=812 [2021-06-05 04:40:17,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-06-05 04:40:17,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 186. [2021-06-05 04:40:17,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 2.156756756756757) internal successors, (399), 185 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:40:17,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 399 transitions. [2021-06-05 04:40:17,689 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 399 transitions. Word has length 20 [2021-06-05 04:40:17,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:40:17,689 INFO L482 AbstractCegarLoop]: Abstraction has 186 states and 399 transitions. [2021-06-05 04:40:17,689 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:40:17,689 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 399 transitions. [2021-06-05 04:40:17,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:40:17,690 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:40:17,690 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:40:17,890 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 631 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3285 [2021-06-05 04:40:17,890 INFO L430 AbstractCegarLoop]: === Iteration 637 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:40:17,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:40:17,890 INFO L82 PathProgramCache]: Analyzing trace with hash 84694330, now seen corresponding path program 631 times [2021-06-05 04:40:17,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:40:17,890 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436048875] [2021-06-05 04:40:17,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:40:17,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:40:18,075 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 04:40:18,075 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:40:18,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436048875] [2021-06-05 04:40:18,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436048875] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:18,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244564058] [2021-06-05 04:40:18,075 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 632 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 632 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:40:18,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:40:18,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:40:18,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:40:18,367 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:18,368 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:18,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 04:40:18,369 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:18,371 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:18,371 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 27 treesize of output 21 [2021-06-05 04:40:18,372 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:18,394 INFO L628 ElimStorePlain]: treesize reduction 34, result has 42.4 percent of original size [2021-06-05 04:40:18,395 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:18,396 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 10 treesize of output 6 [2021-06-05 04:40:18,397 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:40:18,404 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:40:18,404 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 04:40:18,405 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:83, output treesize:14 [2021-06-05 04:40:18,450 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 04:40:18,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [244564058] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:18,450 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:40:18,450 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 04:40:18,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231221967] [2021-06-05 04:40:18,451 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 04:40:18,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:40:18,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 04:40:18,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:40:18,451 INFO L87 Difference]: Start difference. First operand 186 states and 399 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:40:18,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:40:18,912 INFO L93 Difference]: Finished difference Result 215 states and 449 transitions. [2021-06-05 04:40:18,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:40:18,912 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:40:18,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:40:18,913 INFO L225 Difference]: With dead ends: 215 [2021-06-05 04:40:18,913 INFO L226 Difference]: Without dead ends: 202 [2021-06-05 04:40:18,913 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 611.8ms TimeCoverageRelationStatistics Valid=95, Invalid=835, Unknown=0, NotChecked=0, Total=930 [2021-06-05 04:40:18,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-06-05 04:40:18,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 187. [2021-06-05 04:40:18,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 186 states have (on average 2.1559139784946235) internal successors, (401), 186 states have internal predecessors, (401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:40:18,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 401 transitions. [2021-06-05 04:40:18,914 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 401 transitions. Word has length 20 [2021-06-05 04:40:18,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:40:18,914 INFO L482 AbstractCegarLoop]: Abstraction has 187 states and 401 transitions. [2021-06-05 04:40:18,914 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:40:18,914 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 401 transitions. [2021-06-05 04:40:18,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:40:18,915 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:40:18,915 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:40:19,115 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3288,632 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:40:19,115 INFO L430 AbstractCegarLoop]: === Iteration 638 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:40:19,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:40:19,115 INFO L82 PathProgramCache]: Analyzing trace with hash 1220879602, now seen corresponding path program 632 times [2021-06-05 04:40:19,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:40:19,115 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139224723] [2021-06-05 04:40:19,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:40:19,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:40:19,320 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 04:40:19,320 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:40:19,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139224723] [2021-06-05 04:40:19,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139224723] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:19,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610614431] [2021-06-05 04:40:19,320 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 633 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 633 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:40:19,346 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:40:19,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:40:19,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 04:40:19,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:40:19,570 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:19,570 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 19 treesize of output 15 [2021-06-05 04:40:19,571 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:19,593 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:40:19,595 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:19,595 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 13 treesize of output 9 [2021-06-05 04:40:19,597 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:40:19,618 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:40:19,620 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:19,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:40:19,621 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:19,641 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:40:19,643 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:19,643 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 13 treesize of output 9 [2021-06-05 04:40:19,644 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:40:19,663 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:40:19,664 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:40:19,664 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:77, output treesize:35 [2021-06-05 04:40:19,750 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:40:19,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1610614431] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:19,751 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:40:19,751 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 04:40:19,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136554982] [2021-06-05 04:40:19,751 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 04:40:19,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:40:19,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 04:40:19,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:40:19,751 INFO L87 Difference]: Start difference. First operand 187 states and 401 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:40:20,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:40:20,308 INFO L93 Difference]: Finished difference Result 237 states and 485 transitions. [2021-06-05 04:40:20,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:40:20,308 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:40:20,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:40:20,309 INFO L225 Difference]: With dead ends: 237 [2021-06-05 04:40:20,309 INFO L226 Difference]: Without dead ends: 221 [2021-06-05 04:40:20,309 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 641.1ms TimeCoverageRelationStatistics Valid=104, Invalid=888, Unknown=0, NotChecked=0, Total=992 [2021-06-05 04:40:20,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2021-06-05 04:40:20,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 188. [2021-06-05 04:40:20,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 187 states have (on average 2.160427807486631) internal successors, (404), 187 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:40:20,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 404 transitions. [2021-06-05 04:40:20,311 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 404 transitions. Word has length 20 [2021-06-05 04:40:20,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:40:20,311 INFO L482 AbstractCegarLoop]: Abstraction has 188 states and 404 transitions. [2021-06-05 04:40:20,311 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:40:20,311 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 404 transitions. [2021-06-05 04:40:20,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:40:20,311 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:40:20,311 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:40:20,517 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 633 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3292 [2021-06-05 04:40:20,517 INFO L430 AbstractCegarLoop]: === Iteration 639 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:40:20,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:40:20,519 INFO L82 PathProgramCache]: Analyzing trace with hash -1663109014, now seen corresponding path program 633 times [2021-06-05 04:40:20,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:40:20,521 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912518050] [2021-06-05 04:40:20,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:40:20,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:40:20,733 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:40:20,733 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:40:20,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912518050] [2021-06-05 04:40:20,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912518050] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:20,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433114726] [2021-06-05 04:40:20,734 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 634 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 634 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:40:20,759 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:40:20,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:40:20,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:40:20,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:40:20,968 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:20,969 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:20,969 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 19 treesize of output 15 [2021-06-05 04:40:20,969 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:20,971 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:20,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:40:20,972 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:20,993 INFO L628 ElimStorePlain]: treesize reduction 37, result has 40.3 percent of original size [2021-06-05 04:40:20,994 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:20,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:40:20,996 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:40:21,002 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:40:21,003 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 04:40:21,003 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:75, output treesize:14 [2021-06-05 04:40:21,051 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 04:40:21,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1433114726] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:21,051 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:40:21,051 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 04:40:21,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354746807] [2021-06-05 04:40:21,051 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 04:40:21,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:40:21,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 04:40:21,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=534, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:40:21,052 INFO L87 Difference]: Start difference. First operand 188 states and 404 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:40:21,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:40:21,291 INFO L93 Difference]: Finished difference Result 208 states and 435 transitions. [2021-06-05 04:40:21,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:40:21,292 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:40:21,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:40:21,292 INFO L225 Difference]: With dead ends: 208 [2021-06-05 04:40:21,292 INFO L226 Difference]: Without dead ends: 192 [2021-06-05 04:40:21,292 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 455.8ms TimeCoverageRelationStatistics Valid=78, Invalid=624, Unknown=0, NotChecked=0, Total=702 [2021-06-05 04:40:21,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-06-05 04:40:21,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 190. [2021-06-05 04:40:21,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 189 states have (on average 2.1587301587301586) internal successors, (408), 189 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:40:21,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 408 transitions. [2021-06-05 04:40:21,294 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 408 transitions. Word has length 20 [2021-06-05 04:40:21,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:40:21,294 INFO L482 AbstractCegarLoop]: Abstraction has 190 states and 408 transitions. [2021-06-05 04:40:21,294 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:40:21,295 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 408 transitions. [2021-06-05 04:40:21,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:40:21,295 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:40:21,295 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:40:21,495 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 634 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3297 [2021-06-05 04:40:21,495 INFO L430 AbstractCegarLoop]: === Iteration 640 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:40:21,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:40:21,496 INFO L82 PathProgramCache]: Analyzing trace with hash -801103950, now seen corresponding path program 634 times [2021-06-05 04:40:21,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:40:21,496 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429513642] [2021-06-05 04:40:21,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:40:21,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:40:21,732 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:40:21,732 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:40:21,732 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429513642] [2021-06-05 04:40:21,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429513642] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:21,732 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [656316722] [2021-06-05 04:40:21,732 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 635 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 635 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:40:21,758 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:40:21,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:40:21,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:40:21,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:40:21,985 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:21,986 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:21,986 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 27 treesize of output 21 [2021-06-05 04:40:21,987 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:21,989 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:21,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 04:40:21,990 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:22,012 INFO L628 ElimStorePlain]: treesize reduction 34, result has 47.7 percent of original size [2021-06-05 04:40:22,013 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:22,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 04:40:22,014 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:22,021 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:40:22,022 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 04:40:22,022 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:83, output treesize:14 [2021-06-05 04:40:22,066 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 04:40:22,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [656316722] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:22,066 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:40:22,066 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 04:40:22,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451160947] [2021-06-05 04:40:22,066 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 04:40:22,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:40:22,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 04:40:22,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=535, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:40:22,067 INFO L87 Difference]: Start difference. First operand 190 states and 408 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:40:22,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:40:22,423 INFO L93 Difference]: Finished difference Result 209 states and 441 transitions. [2021-06-05 04:40:22,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:40:22,423 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:40:22,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:40:22,424 INFO L225 Difference]: With dead ends: 209 [2021-06-05 04:40:22,424 INFO L226 Difference]: Without dead ends: 196 [2021-06-05 04:40:22,424 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 588.7ms TimeCoverageRelationStatistics Valid=93, Invalid=777, Unknown=0, NotChecked=0, Total=870 [2021-06-05 04:40:22,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-06-05 04:40:22,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 191. [2021-06-05 04:40:22,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 2.1578947368421053) internal successors, (410), 190 states have internal predecessors, (410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:40:22,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 410 transitions. [2021-06-05 04:40:22,436 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 410 transitions. Word has length 20 [2021-06-05 04:40:22,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:40:22,436 INFO L482 AbstractCegarLoop]: Abstraction has 191 states and 410 transitions. [2021-06-05 04:40:22,436 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:40:22,436 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 410 transitions. [2021-06-05 04:40:22,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:40:22,436 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:40:22,436 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:40:22,640 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3301,635 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:40:22,641 INFO L430 AbstractCegarLoop]: === Iteration 641 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:40:22,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:40:22,641 INFO L82 PathProgramCache]: Analyzing trace with hash 335081322, now seen corresponding path program 635 times [2021-06-05 04:40:22,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:40:22,641 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634414426] [2021-06-05 04:40:22,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:40:22,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:40:22,874 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:40:22,875 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:40:22,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634414426] [2021-06-05 04:40:22,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634414426] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:22,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622085916] [2021-06-05 04:40:22,875 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 636 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 636 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:40:22,901 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:40:22,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:40:22,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:40:22,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:40:23,105 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:23,106 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:23,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:40:23,106 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:23,109 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:23,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:40:23,110 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:23,172 INFO L628 ElimStorePlain]: treesize reduction 88, result has 46.0 percent of original size [2021-06-05 04:40:23,175 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:23,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 04:40:23,176 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:40:23,200 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:40:23,203 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:23,203 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 19 treesize of output 15 [2021-06-05 04:40:23,203 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:23,225 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:40:23,227 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:23,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:40:23,229 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:40:23,249 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:40:23,251 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 04:40:23,251 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-06-05 04:40:23,337 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:40:23,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1622085916] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:23,337 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:40:23,337 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 04:40:23,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139263783] [2021-06-05 04:40:23,337 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 04:40:23,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:40:23,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 04:40:23,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=534, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:40:23,338 INFO L87 Difference]: Start difference. First operand 191 states and 410 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:40:23,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:40:23,828 INFO L93 Difference]: Finished difference Result 231 states and 474 transitions. [2021-06-05 04:40:23,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:40:23,828 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:40:23,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:40:23,828 INFO L225 Difference]: With dead ends: 231 [2021-06-05 04:40:23,828 INFO L226 Difference]: Without dead ends: 212 [2021-06-05 04:40:23,828 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 678.6ms TimeCoverageRelationStatistics Valid=104, Invalid=826, Unknown=0, NotChecked=0, Total=930 [2021-06-05 04:40:23,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2021-06-05 04:40:23,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 188. [2021-06-05 04:40:23,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 187 states have (on average 2.160427807486631) internal successors, (404), 187 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:40:23,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 404 transitions. [2021-06-05 04:40:23,830 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 404 transitions. Word has length 20 [2021-06-05 04:40:23,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:40:23,830 INFO L482 AbstractCegarLoop]: Abstraction has 188 states and 404 transitions. [2021-06-05 04:40:23,830 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:40:23,830 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 404 transitions. [2021-06-05 04:40:23,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:40:23,830 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:40:23,830 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:40:24,031 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3304,636 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:40:24,031 INFO L430 AbstractCegarLoop]: === Iteration 642 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:40:24,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:40:24,031 INFO L82 PathProgramCache]: Analyzing trace with hash 1716680882, now seen corresponding path program 636 times [2021-06-05 04:40:24,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:40:24,031 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131515277] [2021-06-05 04:40:24,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:40:24,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:40:24,227 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 04:40:24,227 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:40:24,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131515277] [2021-06-05 04:40:24,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131515277] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:24,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843860176] [2021-06-05 04:40:24,228 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 637 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 637 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:40:24,254 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:40:24,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:40:24,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 04:40:24,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:40:24,476 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:24,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:40:24,477 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:24,483 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:40:24,484 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:24,484 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 10 treesize of output 6 [2021-06-05 04:40:24,486 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:40:24,491 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:40:24,492 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:40:24,492 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:32, output treesize:13 [2021-06-05 04:40:24,534 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:40:24,535 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [843860176] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:24,535 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:40:24,535 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 04:40:24,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696205719] [2021-06-05 04:40:24,535 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 04:40:24,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:40:24,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 04:40:24,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=535, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:40:24,535 INFO L87 Difference]: Start difference. First operand 188 states and 404 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:40:24,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:40:24,761 INFO L93 Difference]: Finished difference Result 210 states and 441 transitions. [2021-06-05 04:40:24,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:40:24,761 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:40:24,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:40:24,761 INFO L225 Difference]: With dead ends: 210 [2021-06-05 04:40:24,761 INFO L226 Difference]: Without dead ends: 203 [2021-06-05 04:40:24,762 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 407.4ms TimeCoverageRelationStatistics Valid=71, Invalid=579, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:40:24,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-06-05 04:40:24,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 189. [2021-06-05 04:40:24,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.1648936170212765) internal successors, (407), 188 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:40:24,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 407 transitions. [2021-06-05 04:40:24,763 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 407 transitions. Word has length 20 [2021-06-05 04:40:24,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:40:24,763 INFO L482 AbstractCegarLoop]: Abstraction has 189 states and 407 transitions. [2021-06-05 04:40:24,763 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:40:24,763 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 407 transitions. [2021-06-05 04:40:24,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:40:24,764 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:40:24,764 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:40:24,964 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3309,637 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:40:24,964 INFO L430 AbstractCegarLoop]: === Iteration 643 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:40:24,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:40:24,964 INFO L82 PathProgramCache]: Analyzing trace with hash -1625933206, now seen corresponding path program 637 times [2021-06-05 04:40:24,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:40:24,964 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593446680] [2021-06-05 04:40:24,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:40:24,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:40:25,189 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 04:40:25,190 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:40:25,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593446680] [2021-06-05 04:40:25,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593446680] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:25,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [717874176] [2021-06-05 04:40:25,190 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 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 04:40:25,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:40:25,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:40:25,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:40:25,459 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:25,459 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:25,459 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 27 treesize of output 21 [2021-06-05 04:40:25,460 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:25,462 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:25,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 04:40:25,463 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:25,485 INFO L628 ElimStorePlain]: treesize reduction 34, result has 42.4 percent of original size [2021-06-05 04:40:25,487 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:25,487 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 10 treesize of output 6 [2021-06-05 04:40:25,489 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:40:25,495 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:40:25,496 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:40:25,496 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:83, output treesize:14 [2021-06-05 04:40:25,539 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 04:40:25,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [717874176] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:25,540 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:40:25,540 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 04:40:25,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642346865] [2021-06-05 04:40:25,540 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 04:40:25,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:40:25,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 04:40:25,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=534, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:40:25,540 INFO L87 Difference]: Start difference. First operand 189 states and 407 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:40:25,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:40:25,865 INFO L93 Difference]: Finished difference Result 214 states and 446 transitions. [2021-06-05 04:40:25,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:40:25,866 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:40:25,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:40:25,866 INFO L225 Difference]: With dead ends: 214 [2021-06-05 04:40:25,866 INFO L226 Difference]: Without dead ends: 198 [2021-06-05 04:40:25,866 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 529.0ms TimeCoverageRelationStatistics Valid=83, Invalid=673, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:40:25,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-06-05 04:40:25,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 190. [2021-06-05 04:40:25,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 189 states have (on average 2.164021164021164) internal successors, (409), 189 states have internal predecessors, (409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:40:25,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 409 transitions. [2021-06-05 04:40:25,867 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 409 transitions. Word has length 20 [2021-06-05 04:40:25,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:40:25,868 INFO L482 AbstractCegarLoop]: Abstraction has 190 states and 409 transitions. [2021-06-05 04:40:25,868 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:40:25,868 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 409 transitions. [2021-06-05 04:40:25,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:40:25,868 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:40:25,868 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:40:26,068 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3313,638 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:40:26,069 INFO L430 AbstractCegarLoop]: === Iteration 644 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:40:26,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:40:26,069 INFO L82 PathProgramCache]: Analyzing trace with hash -763928142, now seen corresponding path program 638 times [2021-06-05 04:40:26,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:40:26,069 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527591363] [2021-06-05 04:40:26,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:40:26,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:40:26,359 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:40:26,359 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:40:26,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527591363] [2021-06-05 04:40:26,359 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527591363] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:26,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [483521303] [2021-06-05 04:40:26,359 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 639 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 639 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:40:26,385 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:40:26,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:40:26,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 04:40:26,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:40:26,672 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:26,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 04:40:26,673 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:26,679 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:40:26,681 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:26,681 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 10 treesize of output 6 [2021-06-05 04:40:26,682 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:40:26,688 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:40:26,689 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 04:40:26,689 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:36, output treesize:13 [2021-06-05 04:40:26,731 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 04:40:26,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [483521303] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:26,732 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:40:26,732 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 04:40:26,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865605782] [2021-06-05 04:40:26,732 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 04:40:26,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:40:26,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 04:40:26,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=534, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:40:26,732 INFO L87 Difference]: Start difference. First operand 190 states and 409 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:40:27,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:40:27,184 INFO L93 Difference]: Finished difference Result 216 states and 453 transitions. [2021-06-05 04:40:27,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:40:27,185 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:40:27,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:40:27,185 INFO L225 Difference]: With dead ends: 216 [2021-06-05 04:40:27,185 INFO L226 Difference]: Without dead ends: 209 [2021-06-05 04:40:27,185 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 698.1ms TimeCoverageRelationStatistics Valid=94, Invalid=776, Unknown=0, NotChecked=0, Total=870 [2021-06-05 04:40:27,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2021-06-05 04:40:27,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 191. [2021-06-05 04:40:27,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 2.168421052631579) internal successors, (412), 190 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:40:27,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 412 transitions. [2021-06-05 04:40:27,187 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 412 transitions. Word has length 20 [2021-06-05 04:40:27,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:40:27,187 INFO L482 AbstractCegarLoop]: Abstraction has 191 states and 412 transitions. [2021-06-05 04:40:27,187 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:40:27,187 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 412 transitions. [2021-06-05 04:40:27,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:40:27,187 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:40:27,187 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:40:27,388 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3316,639 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:40:27,388 INFO L430 AbstractCegarLoop]: === Iteration 645 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:40:27,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:40:27,388 INFO L82 PathProgramCache]: Analyzing trace with hash 372257130, now seen corresponding path program 639 times [2021-06-05 04:40:27,388 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:40:27,388 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971851291] [2021-06-05 04:40:27,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:40:27,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:40:27,627 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:40:27,627 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:40:27,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971851291] [2021-06-05 04:40:27,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971851291] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:27,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158575228] [2021-06-05 04:40:27,627 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 640 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 640 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:40:27,653 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:40:27,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:40:27,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 04:40:27,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:40:27,877 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:27,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:40:27,878 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:27,899 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:40:27,902 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:27,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 04:40:27,903 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:40:27,924 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:40:27,927 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:27,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:40:27,928 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:27,947 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:40:27,950 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:27,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:40:27,951 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:40:27,974 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:40:27,975 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:40:27,975 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:77, output treesize:35 [2021-06-05 04:40:28,058 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 04:40:28,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1158575228] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:28,058 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:40:28,058 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 04:40:28,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435569849] [2021-06-05 04:40:28,058 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 04:40:28,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:40:28,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 04:40:28,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=536, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:40:28,059 INFO L87 Difference]: Start difference. First operand 191 states and 412 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:40:28,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:40:28,647 INFO L93 Difference]: Finished difference Result 244 states and 501 transitions. [2021-06-05 04:40:28,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:40:28,647 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:40:28,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:40:28,647 INFO L225 Difference]: With dead ends: 244 [2021-06-05 04:40:28,647 INFO L226 Difference]: Without dead ends: 228 [2021-06-05 04:40:28,648 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 801.5ms TimeCoverageRelationStatistics Valid=113, Invalid=943, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 04:40:28,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2021-06-05 04:40:28,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 191. [2021-06-05 04:40:28,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 2.168421052631579) internal successors, (412), 190 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:40:28,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 412 transitions. [2021-06-05 04:40:28,649 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 412 transitions. Word has length 20 [2021-06-05 04:40:28,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:40:28,649 INFO L482 AbstractCegarLoop]: Abstraction has 191 states and 412 transitions. [2021-06-05 04:40:28,649 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:40:28,649 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 412 transitions. [2021-06-05 04:40:28,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:40:28,650 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:40:28,650 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:40:28,850 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 640 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3320 [2021-06-05 04:40:28,850 INFO L430 AbstractCegarLoop]: === Iteration 646 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:40:28,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:40:28,850 INFO L82 PathProgramCache]: Analyzing trace with hash 1783235810, now seen corresponding path program 640 times [2021-06-05 04:40:28,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:40:28,850 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692850217] [2021-06-05 04:40:28,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:40:28,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:40:29,026 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 04:40:29,026 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:40:29,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692850217] [2021-06-05 04:40:29,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692850217] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:29,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1948745928] [2021-06-05 04:40:29,026 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 641 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 641 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:40:29,055 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:40:29,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:40:29,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:40:29,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:40:29,260 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:29,261 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:29,261 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 19 treesize of output 15 [2021-06-05 04:40:29,262 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:29,264 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:29,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:40:29,265 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:29,291 INFO L628 ElimStorePlain]: treesize reduction 34, result has 42.4 percent of original size [2021-06-05 04:40:29,293 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:29,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:40:29,294 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:40:29,301 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:40:29,302 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:40:29,302 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:75, output treesize:14 [2021-06-05 04:40:29,342 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 04:40:29,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1948745928] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:29,342 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:40:29,342 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 04:40:29,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973988369] [2021-06-05 04:40:29,342 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 04:40:29,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:40:29,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 04:40:29,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:40:29,343 INFO L87 Difference]: Start difference. First operand 191 states and 412 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:40:29,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:40:29,648 INFO L93 Difference]: Finished difference Result 210 states and 441 transitions. [2021-06-05 04:40:29,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:40:29,648 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:40:29,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:40:29,649 INFO L225 Difference]: With dead ends: 210 [2021-06-05 04:40:29,649 INFO L226 Difference]: Without dead ends: 194 [2021-06-05 04:40:29,649 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 439.2ms TimeCoverageRelationStatistics Valid=87, Invalid=669, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:40:29,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2021-06-05 04:40:29,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 192. [2021-06-05 04:40:29,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 191 states have (on average 2.167539267015707) internal successors, (414), 191 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:40:29,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 414 transitions. [2021-06-05 04:40:29,650 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 414 transitions. Word has length 20 [2021-06-05 04:40:29,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:40:29,650 INFO L482 AbstractCegarLoop]: Abstraction has 192 states and 414 transitions. [2021-06-05 04:40:29,650 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:40:29,650 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 414 transitions. [2021-06-05 04:40:29,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:40:29,651 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:40:29,651 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:40:29,851 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3325,641 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:40:29,851 INFO L430 AbstractCegarLoop]: === Iteration 647 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:40:29,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:40:29,851 INFO L82 PathProgramCache]: Analyzing trace with hash -1649726422, now seen corresponding path program 641 times [2021-06-05 04:40:29,851 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:40:29,851 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019718976] [2021-06-05 04:40:29,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:40:29,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:40:30,046 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 04:40:30,046 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:40:30,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019718976] [2021-06-05 04:40:30,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019718976] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:30,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917334691] [2021-06-05 04:40:30,046 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 642 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 642 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:40:30,072 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:40:30,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:40:30,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:40:30,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:40:30,295 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:30,296 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:30,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 04:40:30,297 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:30,300 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:30,301 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 27 treesize of output 21 [2021-06-05 04:40:30,302 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:30,330 INFO L628 ElimStorePlain]: treesize reduction 40, result has 38.5 percent of original size [2021-06-05 04:40:30,332 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:30,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:40:30,334 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:40:30,341 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:40:30,342 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:40:30,342 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:83, output treesize:14 [2021-06-05 04:40:30,385 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:40:30,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [917334691] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:30,385 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:40:30,385 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 04:40:30,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792030156] [2021-06-05 04:40:30,385 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 04:40:30,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:40:30,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 04:40:30,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:40:30,386 INFO L87 Difference]: Start difference. First operand 192 states and 414 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:40:30,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:40:30,850 INFO L93 Difference]: Finished difference Result 211 states and 447 transitions. [2021-06-05 04:40:30,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:40:30,851 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:40:30,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:40:30,851 INFO L225 Difference]: With dead ends: 211 [2021-06-05 04:40:30,851 INFO L226 Difference]: Without dead ends: 198 [2021-06-05 04:40:30,851 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 645.1ms TimeCoverageRelationStatistics Valid=109, Invalid=883, Unknown=0, NotChecked=0, Total=992 [2021-06-05 04:40:30,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-06-05 04:40:30,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 193. [2021-06-05 04:40:30,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 192 states have (on average 2.1666666666666665) internal successors, (416), 192 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:40:30,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 416 transitions. [2021-06-05 04:40:30,853 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 416 transitions. Word has length 20 [2021-06-05 04:40:30,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:40:30,853 INFO L482 AbstractCegarLoop]: Abstraction has 193 states and 416 transitions. [2021-06-05 04:40:30,853 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:40:30,853 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 416 transitions. [2021-06-05 04:40:30,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:40:30,853 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:40:30,853 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:40:31,053 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3329,642 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:40:31,053 INFO L430 AbstractCegarLoop]: === Iteration 648 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:40:31,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:40:31,054 INFO L82 PathProgramCache]: Analyzing trace with hash -513541150, now seen corresponding path program 642 times [2021-06-05 04:40:31,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:40:31,054 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427607706] [2021-06-05 04:40:31,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:40:31,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:40:31,298 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 04:40:31,298 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:40:31,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427607706] [2021-06-05 04:40:31,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427607706] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:31,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200054061] [2021-06-05 04:40:31,298 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 643 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 643 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:40:31,334 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:40:31,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:40:31,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:40:31,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:40:31,541 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:31,541 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:31,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:40:31,542 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:31,545 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:31,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:40:31,546 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:31,608 INFO L628 ElimStorePlain]: treesize reduction 85, result has 45.9 percent of original size [2021-06-05 04:40:31,610 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:31,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:40:31,612 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:40:31,635 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:40:31,637 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:31,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:40:31,638 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:31,660 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:40:31,662 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:31,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 04:40:31,664 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:40:31,684 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:40:31,685 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 04:40:31,686 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-06-05 04:40:31,767 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 04:40:31,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [200054061] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:31,767 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:40:31,768 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 04:40:31,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863172806] [2021-06-05 04:40:31,768 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 04:40:31,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:40:31,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 04:40:31,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:40:31,768 INFO L87 Difference]: Start difference. First operand 193 states and 416 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:40:32,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:40:32,233 INFO L93 Difference]: Finished difference Result 211 states and 445 transitions. [2021-06-05 04:40:32,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:40:32,233 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:40:32,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:40:32,233 INFO L225 Difference]: With dead ends: 211 [2021-06-05 04:40:32,234 INFO L226 Difference]: Without dead ends: 199 [2021-06-05 04:40:32,234 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 636.5ms TimeCoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-06-05 04:40:32,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-06-05 04:40:32,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 190. [2021-06-05 04:40:32,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 189 states have (on average 2.1693121693121693) internal successors, (410), 189 states have internal predecessors, (410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:40:32,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 410 transitions. [2021-06-05 04:40:32,235 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 410 transitions. Word has length 20 [2021-06-05 04:40:32,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:40:32,235 INFO L482 AbstractCegarLoop]: Abstraction has 190 states and 410 transitions. [2021-06-05 04:40:32,235 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:40:32,235 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 410 transitions. [2021-06-05 04:40:32,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:40:32,235 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:40:32,235 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:40:32,436 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3333,643 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:40:32,436 INFO L430 AbstractCegarLoop]: === Iteration 649 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:40:32,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:40:32,436 INFO L82 PathProgramCache]: Analyzing trace with hash 1696778674, now seen corresponding path program 643 times [2021-06-05 04:40:32,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:40:32,436 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70515668] [2021-06-05 04:40:32,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:40:32,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:40:32,580 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 04:40:32,580 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:40:32,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70515668] [2021-06-05 04:40:32,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70515668] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:32,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182674473] [2021-06-05 04:40:32,580 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 644 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 644 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:40:32,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:40:32,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:40:32,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:40:32,822 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:32,823 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:32,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 04:40:32,824 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:32,826 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:32,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 04:40:32,827 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:32,849 INFO L628 ElimStorePlain]: treesize reduction 34, result has 42.4 percent of original size [2021-06-05 04:40:32,850 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:32,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:40:32,852 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:40:32,858 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:40:32,859 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 04:40:32,859 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:83, output treesize:14 [2021-06-05 04:40:32,898 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:40:32,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1182674473] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:32,898 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:40:32,898 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 04:40:32,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045579678] [2021-06-05 04:40:32,898 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 04:40:32,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:40:32,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 04:40:32,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=490, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:40:32,898 INFO L87 Difference]: Start difference. First operand 190 states and 410 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:40:33,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:40:33,267 INFO L93 Difference]: Finished difference Result 224 states and 473 transitions. [2021-06-05 04:40:33,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 04:40:33,267 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:40:33,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:40:33,267 INFO L225 Difference]: With dead ends: 224 [2021-06-05 04:40:33,267 INFO L226 Difference]: Without dead ends: 205 [2021-06-05 04:40:33,268 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 458.4ms TimeCoverageRelationStatistics Valid=93, Invalid=777, Unknown=0, NotChecked=0, Total=870 [2021-06-05 04:40:33,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-06-05 04:40:33,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 192. [2021-06-05 04:40:33,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 191 states have (on average 2.167539267015707) internal successors, (414), 191 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:40:33,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 414 transitions. [2021-06-05 04:40:33,269 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 414 transitions. Word has length 20 [2021-06-05 04:40:33,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:40:33,269 INFO L482 AbstractCegarLoop]: Abstraction has 192 states and 414 transitions. [2021-06-05 04:40:33,269 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:40:33,269 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 414 transitions. [2021-06-05 04:40:33,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:40:33,269 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:40:33,269 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:40:33,470 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3338,644 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:40:33,470 INFO L430 AbstractCegarLoop]: === Iteration 650 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:40:33,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:40:33,470 INFO L82 PathProgramCache]: Analyzing trace with hash -1645835414, now seen corresponding path program 644 times [2021-06-05 04:40:33,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:40:33,470 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872383291] [2021-06-05 04:40:33,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:40:33,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:40:33,665 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 04:40:33,665 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:40:33,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872383291] [2021-06-05 04:40:33,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872383291] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:33,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903368507] [2021-06-05 04:40:33,665 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 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 04:40:33,690 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:40:33,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:40:33,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 04:40:33,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:40:33,930 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:33,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:40:33,931 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:33,937 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:40:33,938 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:33,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 04:40:33,940 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:40:33,945 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:40:33,946 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 04:40:33,946 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:32, output treesize:13 [2021-06-05 04:40:33,990 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:40:33,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [903368507] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:33,991 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:40:33,991 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 04:40:33,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574528237] [2021-06-05 04:40:33,991 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 04:40:33,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:40:33,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 04:40:33,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=536, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:40:33,991 INFO L87 Difference]: Start difference. First operand 192 states and 414 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:40:34,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:40:34,318 INFO L93 Difference]: Finished difference Result 211 states and 446 transitions. [2021-06-05 04:40:34,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:40:34,318 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:40:34,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:40:34,319 INFO L225 Difference]: With dead ends: 211 [2021-06-05 04:40:34,319 INFO L226 Difference]: Without dead ends: 204 [2021-06-05 04:40:34,319 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 492.5ms TimeCoverageRelationStatistics Valid=80, Invalid=676, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:40:34,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-06-05 04:40:34,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 193. [2021-06-05 04:40:34,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 192 states have (on average 2.171875) internal successors, (417), 192 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:40:34,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 417 transitions. [2021-06-05 04:40:34,321 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 417 transitions. Word has length 20 [2021-06-05 04:40:34,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:40:34,321 INFO L482 AbstractCegarLoop]: Abstraction has 193 states and 417 transitions. [2021-06-05 04:40:34,321 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:40:34,321 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 417 transitions. [2021-06-05 04:40:34,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:40:34,321 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:40:34,321 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:40:34,521 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 645 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3342 [2021-06-05 04:40:34,521 INFO L430 AbstractCegarLoop]: === Iteration 651 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:40:34,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:40:34,522 INFO L82 PathProgramCache]: Analyzing trace with hash -783830350, now seen corresponding path program 645 times [2021-06-05 04:40:34,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:40:34,522 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092002981] [2021-06-05 04:40:34,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:40:34,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:40:34,711 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 04:40:34,711 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:40:34,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092002981] [2021-06-05 04:40:34,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092002981] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:34,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330364394] [2021-06-05 04:40:34,711 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 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 04:40:34,737 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:40:34,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:40:34,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:40:34,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:40:35,005 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:35,005 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:35,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:40:35,006 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:35,008 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:35,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:40:35,009 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:35,030 INFO L628 ElimStorePlain]: treesize reduction 34, result has 45.2 percent of original size [2021-06-05 04:40:35,031 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:35,032 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 13 treesize of output 9 [2021-06-05 04:40:35,033 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:40:35,040 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:40:35,041 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 04:40:35,041 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:75, output treesize:14 [2021-06-05 04:40:35,087 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 04:40:35,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [330364394] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:35,087 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:40:35,087 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 04:40:35,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272258222] [2021-06-05 04:40:35,087 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 04:40:35,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:40:35,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 04:40:35,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=536, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:40:35,087 INFO L87 Difference]: Start difference. First operand 193 states and 417 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:40:35,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:40:35,578 INFO L93 Difference]: Finished difference Result 223 states and 469 transitions. [2021-06-05 04:40:35,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 04:40:35,578 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:40:35,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:40:35,578 INFO L225 Difference]: With dead ends: 223 [2021-06-05 04:40:35,578 INFO L226 Difference]: Without dead ends: 210 [2021-06-05 04:40:35,579 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 620.9ms TimeCoverageRelationStatistics Valid=95, Invalid=835, Unknown=0, NotChecked=0, Total=930 [2021-06-05 04:40:35,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2021-06-05 04:40:35,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 194. [2021-06-05 04:40:35,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 193 states have (on average 2.1709844559585494) internal successors, (419), 193 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:40:35,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 419 transitions. [2021-06-05 04:40:35,580 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 419 transitions. Word has length 20 [2021-06-05 04:40:35,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:40:35,580 INFO L482 AbstractCegarLoop]: Abstraction has 194 states and 419 transitions. [2021-06-05 04:40:35,580 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:40:35,580 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 419 transitions. [2021-06-05 04:40:35,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:40:35,581 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:40:35,581 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:40:35,781 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3345,646 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:40:35,781 INFO L430 AbstractCegarLoop]: === Iteration 652 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:40:35,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:40:35,781 INFO L82 PathProgramCache]: Analyzing trace with hash 352354922, now seen corresponding path program 646 times [2021-06-05 04:40:35,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:40:35,781 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750516890] [2021-06-05 04:40:35,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:40:35,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:40:36,022 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 04:40:36,022 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:40:36,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750516890] [2021-06-05 04:40:36,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750516890] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:36,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146365394] [2021-06-05 04:40:36,023 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 647 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 647 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:40:36,048 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:40:36,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:40:36,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:40:36,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:40:36,281 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:36,282 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:36,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:40:36,283 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:36,285 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:36,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:40:36,286 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:36,347 INFO L628 ElimStorePlain]: treesize reduction 85, result has 45.9 percent of original size [2021-06-05 04:40:36,350 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:36,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:40:36,351 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:36,373 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:40:36,375 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:36,375 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 13 treesize of output 9 [2021-06-05 04:40:36,377 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:40:36,398 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:40:36,400 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:36,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:40:36,402 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:40:36,422 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:40:36,424 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 04:40:36,424 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-06-05 04:40:36,514 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 04:40:36,514 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2146365394] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:36,514 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:40:36,514 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 04:40:36,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362796475] [2021-06-05 04:40:36,515 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 04:40:36,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:40:36,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 04:40:36,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=491, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:40:36,515 INFO L87 Difference]: Start difference. First operand 194 states and 419 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:40:37,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:40:37,064 INFO L93 Difference]: Finished difference Result 246 states and 504 transitions. [2021-06-05 04:40:37,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 04:40:37,064 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:40:37,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:40:37,064 INFO L225 Difference]: With dead ends: 246 [2021-06-05 04:40:37,064 INFO L226 Difference]: Without dead ends: 227 [2021-06-05 04:40:37,064 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 699.3ms TimeCoverageRelationStatistics Valid=101, Invalid=829, Unknown=0, NotChecked=0, Total=930 [2021-06-05 04:40:37,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2021-06-05 04:40:37,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 193. [2021-06-05 04:40:37,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 192 states have (on average 2.171875) internal successors, (417), 192 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:40:37,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 417 transitions. [2021-06-05 04:40:37,066 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 417 transitions. Word has length 20 [2021-06-05 04:40:37,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:40:37,066 INFO L482 AbstractCegarLoop]: Abstraction has 193 states and 417 transitions. [2021-06-05 04:40:37,066 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:40:37,066 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 417 transitions. [2021-06-05 04:40:37,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:40:37,066 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:40:37,066 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:40:37,267 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3349,647 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:40:37,267 INFO L430 AbstractCegarLoop]: === Iteration 653 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:40:37,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:40:37,267 INFO L82 PathProgramCache]: Analyzing trace with hash 1763333602, now seen corresponding path program 647 times [2021-06-05 04:40:37,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:40:37,267 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452221538] [2021-06-05 04:40:37,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:40:37,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:40:37,467 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 04:40:37,467 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:40:37,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452221538] [2021-06-05 04:40:37,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452221538] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:37,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36891321] [2021-06-05 04:40:37,467 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 648 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 648 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:40:37,493 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:40:37,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:40:37,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:40:37,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:40:37,706 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:37,706 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:37,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:40:37,707 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:37,709 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:37,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:40:37,710 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:37,732 INFO L628 ElimStorePlain]: treesize reduction 34, result has 42.4 percent of original size [2021-06-05 04:40:37,733 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:37,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:40:37,735 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:40:37,741 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:40:37,742 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 04:40:37,742 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:75, output treesize:14 [2021-06-05 04:40:37,781 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 04:40:37,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [36891321] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:37,781 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:40:37,781 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 04:40:37,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2987276] [2021-06-05 04:40:37,781 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 04:40:37,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:40:37,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 04:40:37,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=490, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:40:37,782 INFO L87 Difference]: Start difference. First operand 193 states and 417 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:40:38,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:40:38,069 INFO L93 Difference]: Finished difference Result 213 states and 448 transitions. [2021-06-05 04:40:38,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:40:38,070 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:40:38,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:40:38,070 INFO L225 Difference]: With dead ends: 213 [2021-06-05 04:40:38,070 INFO L226 Difference]: Without dead ends: 197 [2021-06-05 04:40:38,070 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 497.1ms TimeCoverageRelationStatistics Valid=78, Invalid=624, Unknown=0, NotChecked=0, Total=702 [2021-06-05 04:40:38,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-06-05 04:40:38,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 195. [2021-06-05 04:40:38,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 2.170103092783505) internal successors, (421), 194 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:40:38,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 421 transitions. [2021-06-05 04:40:38,072 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 421 transitions. Word has length 20 [2021-06-05 04:40:38,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:40:38,072 INFO L482 AbstractCegarLoop]: Abstraction has 195 states and 421 transitions. [2021-06-05 04:40:38,072 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:40:38,072 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 421 transitions. [2021-06-05 04:40:38,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:40:38,072 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:40:38,072 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:40:38,273 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3354,648 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:40:38,273 INFO L430 AbstractCegarLoop]: === Iteration 654 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:40:38,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:40:38,273 INFO L82 PathProgramCache]: Analyzing trace with hash -1669628630, now seen corresponding path program 648 times [2021-06-05 04:40:38,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:40:38,273 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575055405] [2021-06-05 04:40:38,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:40:38,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:40:38,479 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:40:38,479 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:40:38,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575055405] [2021-06-05 04:40:38,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575055405] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:38,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201185388] [2021-06-05 04:40:38,480 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 649 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 649 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:40:38,506 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:40:38,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:40:38,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:40:38,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:40:38,730 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:38,731 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:38,731 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 27 treesize of output 21 [2021-06-05 04:40:38,732 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:38,734 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:38,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 04:40:38,735 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:38,757 INFO L628 ElimStorePlain]: treesize reduction 40, result has 43.7 percent of original size [2021-06-05 04:40:38,759 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:38,759 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 21 treesize of output 13 [2021-06-05 04:40:38,759 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:38,766 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:40:38,767 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 04:40:38,767 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:83, output treesize:14 [2021-06-05 04:40:38,815 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 04:40:38,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1201185388] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:38,815 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:40:38,815 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 04:40:38,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967577763] [2021-06-05 04:40:38,815 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 04:40:38,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:40:38,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 04:40:38,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=534, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:40:38,815 INFO L87 Difference]: Start difference. First operand 195 states and 421 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:40:39,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:40:39,430 INFO L93 Difference]: Finished difference Result 215 states and 456 transitions. [2021-06-05 04:40:39,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 04:40:39,430 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:40:39,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:40:39,430 INFO L225 Difference]: With dead ends: 215 [2021-06-05 04:40:39,430 INFO L226 Difference]: Without dead ends: 202 [2021-06-05 04:40:39,430 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 691.0ms TimeCoverageRelationStatistics Valid=111, Invalid=945, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 04:40:39,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-06-05 04:40:39,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 196. [2021-06-05 04:40:39,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 2.169230769230769) internal successors, (423), 195 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:40:39,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 423 transitions. [2021-06-05 04:40:39,432 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 423 transitions. Word has length 20 [2021-06-05 04:40:39,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:40:39,432 INFO L482 AbstractCegarLoop]: Abstraction has 196 states and 423 transitions. [2021-06-05 04:40:39,432 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:40:39,432 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 423 transitions. [2021-06-05 04:40:39,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:40:39,432 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:40:39,432 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:40:39,633 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3357,649 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:40:39,633 INFO L430 AbstractCegarLoop]: === Iteration 655 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:40:39,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:40:39,633 INFO L82 PathProgramCache]: Analyzing trace with hash -533443358, now seen corresponding path program 649 times [2021-06-05 04:40:39,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:40:39,633 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333516652] [2021-06-05 04:40:39,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:40:39,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:40:39,820 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:40:39,820 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:40:39,820 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333516652] [2021-06-05 04:40:39,820 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333516652] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:39,820 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609600408] [2021-06-05 04:40:39,820 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 650 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 650 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:40:39,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:40:39,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:40:39,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:40:40,043 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:40,044 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:40,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:40:40,045 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:40,047 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:40,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:40:40,048 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:40,109 INFO L628 ElimStorePlain]: treesize reduction 88, result has 45.0 percent of original size [2021-06-05 04:40:40,112 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:40,112 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 10 treesize of output 6 [2021-06-05 04:40:40,113 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:40:40,136 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:40:40,139 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:40,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:40:40,140 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:40,161 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:40:40,163 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:40,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:40:40,165 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:40:40,189 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:40:40,191 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 04:40:40,191 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-06-05 04:40:40,268 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 04:40:40,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [609600408] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:40,268 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:40:40,268 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 04:40:40,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369744000] [2021-06-05 04:40:40,269 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 04:40:40,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:40:40,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 04:40:40,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:40:40,269 INFO L87 Difference]: Start difference. First operand 196 states and 423 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:40:40,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:40:40,792 INFO L93 Difference]: Finished difference Result 216 states and 456 transitions. [2021-06-05 04:40:40,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:40:40,792 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:40:40,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:40:40,792 INFO L225 Difference]: With dead ends: 216 [2021-06-05 04:40:40,792 INFO L226 Difference]: Without dead ends: 204 [2021-06-05 04:40:40,792 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 598.0ms TimeCoverageRelationStatistics Valid=104, Invalid=826, Unknown=0, NotChecked=0, Total=930 [2021-06-05 04:40:40,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-06-05 04:40:40,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 194. [2021-06-05 04:40:40,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 193 states have (on average 2.1709844559585494) internal successors, (419), 193 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:40:40,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 419 transitions. [2021-06-05 04:40:40,794 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 419 transitions. Word has length 20 [2021-06-05 04:40:40,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:40:40,794 INFO L482 AbstractCegarLoop]: Abstraction has 194 states and 419 transitions. [2021-06-05 04:40:40,794 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:40:40,794 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 419 transitions. [2021-06-05 04:40:40,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:40:40,794 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:40:40,794 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:40:40,995 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 650 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3360 [2021-06-05 04:40:40,995 INFO L430 AbstractCegarLoop]: === Iteration 656 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:40:40,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:40:40,995 INFO L82 PathProgramCache]: Analyzing trace with hash 518554546, now seen corresponding path program 650 times [2021-06-05 04:40:40,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:40:40,995 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455682892] [2021-06-05 04:40:40,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:40:40,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:40:41,199 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:40:41,200 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:40:41,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455682892] [2021-06-05 04:40:41,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455682892] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:41,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767933295] [2021-06-05 04:40:41,200 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 651 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 651 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:40:41,242 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:40:41,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:40:41,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 04:40:41,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:40:41,491 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:41,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 04:40:41,492 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:41,498 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:40:41,499 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:41,500 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 10 treesize of output 6 [2021-06-05 04:40:41,501 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:40:41,506 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:40:41,507 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 04:40:41,507 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:36, output treesize:13 [2021-06-05 04:40:41,543 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:40:41,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [767933295] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:41,543 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:40:41,543 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 04:40:41,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784620900] [2021-06-05 04:40:41,543 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 04:40:41,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:40:41,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 04:40:41,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:40:41,544 INFO L87 Difference]: Start difference. First operand 194 states and 419 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:40:41,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:40:41,913 INFO L93 Difference]: Finished difference Result 219 states and 467 transitions. [2021-06-05 04:40:41,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 04:40:41,913 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:40:41,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:40:41,914 INFO L225 Difference]: With dead ends: 219 [2021-06-05 04:40:41,914 INFO L226 Difference]: Without dead ends: 212 [2021-06-05 04:40:41,914 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 510.9ms TimeCoverageRelationStatistics Valid=89, Invalid=667, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:40:41,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2021-06-05 04:40:41,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 196. [2021-06-05 04:40:41,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 2.174358974358974) internal successors, (424), 195 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:40:41,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 424 transitions. [2021-06-05 04:40:41,915 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 424 transitions. Word has length 20 [2021-06-05 04:40:41,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:40:41,915 INFO L482 AbstractCegarLoop]: Abstraction has 196 states and 424 transitions. [2021-06-05 04:40:41,916 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:40:41,916 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 424 transitions. [2021-06-05 04:40:41,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:40:41,916 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:40:41,916 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:40:42,116 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3365,651 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:40:42,116 INFO L430 AbstractCegarLoop]: === Iteration 657 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:40:42,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:40:42,116 INFO L82 PathProgramCache]: Analyzing trace with hash 1654739818, now seen corresponding path program 651 times [2021-06-05 04:40:42,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:40:42,117 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410759405] [2021-06-05 04:40:42,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:40:42,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:40:42,283 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:40:42,284 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:40:42,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410759405] [2021-06-05 04:40:42,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410759405] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:42,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323493298] [2021-06-05 04:40:42,284 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 652 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 652 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:40:42,310 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 04:40:42,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:40:42,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:40:42,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:40:42,465 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:42,466 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:42,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:40:42,467 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:42,470 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:42,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:40:42,471 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:42,532 INFO L628 ElimStorePlain]: treesize reduction 88, result has 45.0 percent of original size [2021-06-05 04:40:42,535 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:42,535 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 10 treesize of output 6 [2021-06-05 04:40:42,536 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:40:42,560 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:40:42,562 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:42,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:40:42,563 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:42,585 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:40:42,588 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:42,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:40:42,590 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:40:42,611 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:40:42,612 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:40:42,612 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-06-05 04:40:42,689 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 04:40:42,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1323493298] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:42,690 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:40:42,690 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 04:40:42,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225792509] [2021-06-05 04:40:42,690 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 04:40:42,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:40:42,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 04:40:42,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=485, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:40:42,690 INFO L87 Difference]: Start difference. First operand 196 states and 424 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:40:43,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:40:43,067 INFO L93 Difference]: Finished difference Result 225 states and 473 transitions. [2021-06-05 04:40:43,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 04:40:43,068 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:40:43,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:40:43,068 INFO L225 Difference]: With dead ends: 225 [2021-06-05 04:40:43,068 INFO L226 Difference]: Without dead ends: 213 [2021-06-05 04:40:43,068 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 448.5ms TimeCoverageRelationStatistics Valid=90, Invalid=666, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:40:43,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2021-06-05 04:40:43,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 196. [2021-06-05 04:40:43,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 2.174358974358974) internal successors, (424), 195 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:40:43,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 424 transitions. [2021-06-05 04:40:43,070 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 424 transitions. Word has length 20 [2021-06-05 04:40:43,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:40:43,070 INFO L482 AbstractCegarLoop]: Abstraction has 196 states and 424 transitions. [2021-06-05 04:40:43,070 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:40:43,070 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 424 transitions. [2021-06-05 04:40:43,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:40:43,070 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:40:43,070 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:40:43,270 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 652 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3369 [2021-06-05 04:40:43,270 INFO L430 AbstractCegarLoop]: === Iteration 658 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:40:43,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:40:43,271 INFO L82 PathProgramCache]: Analyzing trace with hash -491430942, now seen corresponding path program 652 times [2021-06-05 04:40:43,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:40:43,271 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601107690] [2021-06-05 04:40:43,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:40:43,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:40:43,499 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 04:40:43,499 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:40:43,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601107690] [2021-06-05 04:40:43,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601107690] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:43,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936441626] [2021-06-05 04:40:43,499 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 653 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 653 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:40:43,525 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:40:43,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:40:43,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:40:43,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:40:43,669 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:43,670 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:43,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:40:43,671 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:43,673 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:43,674 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:43,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:40:43,674 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:43,677 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:43,677 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:43,677 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 19 treesize of output 15 [2021-06-05 04:40:43,678 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:43,681 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:43,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:40:43,681 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:43,736 INFO L628 ElimStorePlain]: treesize reduction 80, result has 45.6 percent of original size [2021-06-05 04:40:43,738 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:43,739 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:43,739 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 10 treesize of output 6 [2021-06-05 04:40:43,740 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:40:43,742 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:43,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 04:40:43,744 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:40:43,766 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:40:43,767 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 04:40:43,767 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:173, output treesize:38 [2021-06-05 04:40:43,848 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 04:40:43,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [936441626] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:43,849 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:40:43,849 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 04:40:43,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627123690] [2021-06-05 04:40:43,849 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 04:40:43,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:40:43,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 04:40:43,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:40:43,849 INFO L87 Difference]: Start difference. First operand 196 states and 424 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:40:44,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:40:44,398 INFO L93 Difference]: Finished difference Result 249 states and 519 transitions. [2021-06-05 04:40:44,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 04:40:44,398 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:40:44,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:40:44,399 INFO L225 Difference]: With dead ends: 249 [2021-06-05 04:40:44,399 INFO L226 Difference]: Without dead ends: 230 [2021-06-05 04:40:44,399 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 635.8ms TimeCoverageRelationStatistics Valid=113, Invalid=817, Unknown=0, NotChecked=0, Total=930 [2021-06-05 04:40:44,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2021-06-05 04:40:44,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 196. [2021-06-05 04:40:44,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 2.174358974358974) internal successors, (424), 195 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:40:44,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 424 transitions. [2021-06-05 04:40:44,400 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 424 transitions. Word has length 20 [2021-06-05 04:40:44,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:40:44,401 INFO L482 AbstractCegarLoop]: Abstraction has 196 states and 424 transitions. [2021-06-05 04:40:44,401 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:40:44,401 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 424 transitions. [2021-06-05 04:40:44,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:40:44,401 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:40:44,401 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:40:44,601 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3374,653 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:40:44,601 INFO L430 AbstractCegarLoop]: === Iteration 659 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:40:44,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:40:44,601 INFO L82 PathProgramCache]: Analyzing trace with hash 73390698, now seen corresponding path program 653 times [2021-06-05 04:40:44,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:40:44,602 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519696180] [2021-06-05 04:40:44,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:40:44,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:40:44,778 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 04:40:44,778 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:40:44,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519696180] [2021-06-05 04:40:44,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519696180] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:44,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220851770] [2021-06-05 04:40:44,778 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 654 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 654 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:40:44,804 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:40:44,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:40:44,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:40:44,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:40:45,006 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:45,006 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:45,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:40:45,007 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:45,009 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:45,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:40:45,010 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:45,030 INFO L628 ElimStorePlain]: treesize reduction 37, result has 40.3 percent of original size [2021-06-05 04:40:45,032 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:45,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:40:45,034 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:40:45,040 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:40:45,041 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 04:40:45,041 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:75, output treesize:14 [2021-06-05 04:40:45,082 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:40:45,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1220851770] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:45,082 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:40:45,082 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 04:40:45,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212014526] [2021-06-05 04:40:45,082 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 04:40:45,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:40:45,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 04:40:45,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=528, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:40:45,082 INFO L87 Difference]: Start difference. First operand 196 states and 424 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:40:45,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:40:45,582 INFO L93 Difference]: Finished difference Result 227 states and 481 transitions. [2021-06-05 04:40:45,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 04:40:45,582 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:40:45,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:40:45,583 INFO L225 Difference]: With dead ends: 227 [2021-06-05 04:40:45,583 INFO L226 Difference]: Without dead ends: 211 [2021-06-05 04:40:45,583 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 557.0ms TimeCoverageRelationStatistics Valid=117, Invalid=939, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 04:40:45,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-06-05 04:40:45,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 198. [2021-06-05 04:40:45,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 197 states have (on average 2.1725888324873095) internal successors, (428), 197 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:40:45,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 428 transitions. [2021-06-05 04:40:45,584 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 428 transitions. Word has length 20 [2021-06-05 04:40:45,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:40:45,584 INFO L482 AbstractCegarLoop]: Abstraction has 198 states and 428 transitions. [2021-06-05 04:40:45,584 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:40:45,584 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 428 transitions. [2021-06-05 04:40:45,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:40:45,585 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:40:45,585 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:40:45,785 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3377,654 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:40:45,785 INFO L430 AbstractCegarLoop]: === Iteration 660 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:40:45,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:40:45,785 INFO L82 PathProgramCache]: Analyzing trace with hash 935395762, now seen corresponding path program 654 times [2021-06-05 04:40:45,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:40:45,785 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648169446] [2021-06-05 04:40:45,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:40:45,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:40:45,994 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:40:45,995 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:40:45,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648169446] [2021-06-05 04:40:45,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648169446] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:45,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449253203] [2021-06-05 04:40:45,995 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 655 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 655 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:40:46,022 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:40:46,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:40:46,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 04:40:46,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:40:46,207 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:46,208 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:46,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:40:46,209 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:46,211 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:46,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:40:46,212 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:46,230 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:40:46,232 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:46,233 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:46,233 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 10 treesize of output 6 [2021-06-05 04:40:46,234 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:40:46,236 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:46,236 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 10 treesize of output 6 [2021-06-05 04:40:46,237 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:40:46,254 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:40:46,255 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 04:40:46,255 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:67, output treesize:29 [2021-06-05 04:40:46,311 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:40:46,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1449253203] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:46,312 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:40:46,312 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 04:40:46,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505218246] [2021-06-05 04:40:46,312 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 04:40:46,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:40:46,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 04:40:46,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=534, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:40:46,312 INFO L87 Difference]: Start difference. First operand 198 states and 428 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:40:46,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:40:46,815 INFO L93 Difference]: Finished difference Result 221 states and 469 transitions. [2021-06-05 04:40:46,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:40:46,815 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:40:46,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:40:46,815 INFO L225 Difference]: With dead ends: 221 [2021-06-05 04:40:46,815 INFO L226 Difference]: Without dead ends: 208 [2021-06-05 04:40:46,816 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 618.2ms TimeCoverageRelationStatistics Valid=112, Invalid=944, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 04:40:46,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-06-05 04:40:46,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 199. [2021-06-05 04:40:46,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 198 states have (on average 2.1717171717171717) internal successors, (430), 198 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:40:46,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 430 transitions. [2021-06-05 04:40:46,817 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 430 transitions. Word has length 20 [2021-06-05 04:40:46,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:40:46,817 INFO L482 AbstractCegarLoop]: Abstraction has 199 states and 430 transitions. [2021-06-05 04:40:46,817 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:40:46,817 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 430 transitions. [2021-06-05 04:40:46,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:40:46,817 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:40:46,818 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:40:47,018 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3381,655 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:40:47,018 INFO L430 AbstractCegarLoop]: === Iteration 661 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:40:47,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:40:47,018 INFO L82 PathProgramCache]: Analyzing trace with hash 2071581034, now seen corresponding path program 655 times [2021-06-05 04:40:47,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:40:47,019 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072129939] [2021-06-05 04:40:47,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:40:47,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:40:47,317 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 04:40:47,317 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:40:47,317 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072129939] [2021-06-05 04:40:47,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072129939] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:47,317 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350012012] [2021-06-05 04:40:47,317 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 656 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 656 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:40:47,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:40:47,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:40:47,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:40:47,554 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:47,555 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:47,555 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 19 treesize of output 15 [2021-06-05 04:40:47,556 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:47,558 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:47,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:40:47,559 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:47,619 INFO L628 ElimStorePlain]: treesize reduction 94, result has 41.3 percent of original size [2021-06-05 04:40:47,621 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 9 treesize of output 7 [2021-06-05 04:40:47,622 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:47,644 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:40:47,644 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 04:40:47,646 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:47,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:40:47,648 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:40:47,669 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:40:47,670 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 04:40:47,670 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:173, output treesize:36 [2021-06-05 04:40:47,758 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:40:47,758 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [350012012] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:47,758 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:40:47,758 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 04:40:47,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718161286] [2021-06-05 04:40:47,758 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 04:40:47,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:40:47,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 04:40:47,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:40:47,759 INFO L87 Difference]: Start difference. First operand 199 states and 430 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:40:48,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:40:48,382 INFO L93 Difference]: Finished difference Result 243 states and 502 transitions. [2021-06-05 04:40:48,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 04:40:48,382 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:40:48,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:40:48,382 INFO L225 Difference]: With dead ends: 243 [2021-06-05 04:40:48,383 INFO L226 Difference]: Without dead ends: 224 [2021-06-05 04:40:48,383 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 849.2ms TimeCoverageRelationStatistics Valid=126, Invalid=996, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 04:40:48,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-06-05 04:40:48,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 197. [2021-06-05 04:40:48,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 2.173469387755102) internal successors, (426), 196 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:40:48,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 426 transitions. [2021-06-05 04:40:48,384 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 426 transitions. Word has length 20 [2021-06-05 04:40:48,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:40:48,384 INFO L482 AbstractCegarLoop]: Abstraction has 197 states and 426 transitions. [2021-06-05 04:40:48,384 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:40:48,385 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 426 transitions. [2021-06-05 04:40:48,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:40:48,385 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:40:48,385 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:40:48,585 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3387,656 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:40:48,585 INFO L430 AbstractCegarLoop]: === Iteration 662 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:40:48,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:40:48,585 INFO L82 PathProgramCache]: Analyzing trace with hash -1171388358, now seen corresponding path program 656 times [2021-06-05 04:40:48,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:40:48,586 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520046991] [2021-06-05 04:40:48,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:40:48,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:40:48,761 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 04:40:48,762 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:40:48,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520046991] [2021-06-05 04:40:48,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520046991] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:48,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081717862] [2021-06-05 04:40:48,762 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 657 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 657 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:40:48,787 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:40:48,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:40:48,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 04:40:48,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:40:48,976 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:48,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 04:40:48,978 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:48,984 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:40:48,985 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:48,985 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 10 treesize of output 6 [2021-06-05 04:40:48,987 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:40:48,992 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:40:48,993 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 04:40:48,993 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:36, output treesize:13 [2021-06-05 04:40:49,033 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 04:40:49,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2081717862] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:49,033 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:40:49,033 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 04:40:49,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410120517] [2021-06-05 04:40:49,033 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 04:40:49,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:40:49,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 04:40:49,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:40:49,034 INFO L87 Difference]: Start difference. First operand 197 states and 426 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:40:49,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:40:49,507 INFO L93 Difference]: Finished difference Result 221 states and 472 transitions. [2021-06-05 04:40:49,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 04:40:49,507 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:40:49,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:40:49,508 INFO L225 Difference]: With dead ends: 221 [2021-06-05 04:40:49,508 INFO L226 Difference]: Without dead ends: 214 [2021-06-05 04:40:49,508 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 533.4ms TimeCoverageRelationStatistics Valid=111, Invalid=819, Unknown=0, NotChecked=0, Total=930 [2021-06-05 04:40:49,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-06-05 04:40:49,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 199. [2021-06-05 04:40:49,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 198 states have (on average 2.176767676767677) internal successors, (431), 198 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:40:49,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 431 transitions. [2021-06-05 04:40:49,510 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 431 transitions. Word has length 20 [2021-06-05 04:40:49,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:40:49,510 INFO L482 AbstractCegarLoop]: Abstraction has 199 states and 431 transitions. [2021-06-05 04:40:49,510 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:40:49,510 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 431 transitions. [2021-06-05 04:40:49,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:40:49,510 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:40:49,510 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:40:49,710 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 657 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3392 [2021-06-05 04:40:49,710 INFO L430 AbstractCegarLoop]: === Iteration 663 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:40:49,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:40:49,711 INFO L82 PathProgramCache]: Analyzing trace with hash -35203086, now seen corresponding path program 657 times [2021-06-05 04:40:49,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:40:49,711 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685021889] [2021-06-05 04:40:49,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:40:49,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:40:49,926 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:40:49,927 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:40:49,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685021889] [2021-06-05 04:40:49,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685021889] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:49,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014373518] [2021-06-05 04:40:49,927 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 658 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 658 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:40:49,953 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 04:40:49,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:40:49,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 04:40:49,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:40:50,093 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:50,094 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:50,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:40:50,095 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:50,097 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:50,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:40:50,097 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:50,118 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:40:50,121 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:50,121 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:50,121 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 10 treesize of output 6 [2021-06-05 04:40:50,123 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:40:50,125 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:50,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 04:40:50,126 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:40:50,146 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:40:50,147 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 04:40:50,147 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:35 [2021-06-05 04:40:50,239 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 04:40:50,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2014373518] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:50,239 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:40:50,239 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 04:40:50,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64270021] [2021-06-05 04:40:50,240 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 04:40:50,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:40:50,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 04:40:50,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:40:50,240 INFO L87 Difference]: Start difference. First operand 199 states and 431 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:40:50,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:40:50,907 INFO L93 Difference]: Finished difference Result 225 states and 479 transitions. [2021-06-05 04:40:50,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:40:50,907 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:40:50,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:40:50,907 INFO L225 Difference]: With dead ends: 225 [2021-06-05 04:40:50,907 INFO L226 Difference]: Without dead ends: 218 [2021-06-05 04:40:50,907 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 747.8ms TimeCoverageRelationStatistics Valid=135, Invalid=1055, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 04:40:50,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2021-06-05 04:40:50,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 199. [2021-06-05 04:40:50,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 198 states have (on average 2.176767676767677) internal successors, (431), 198 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:40:50,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 431 transitions. [2021-06-05 04:40:50,909 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 431 transitions. Word has length 20 [2021-06-05 04:40:50,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:40:50,909 INFO L482 AbstractCegarLoop]: Abstraction has 199 states and 431 transitions. [2021-06-05 04:40:50,909 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:40:50,909 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 431 transitions. [2021-06-05 04:40:50,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:40:50,909 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:40:50,909 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:40:51,110 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 658 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3396 [2021-06-05 04:40:51,110 INFO L430 AbstractCegarLoop]: === Iteration 664 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:40:51,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:40:51,110 INFO L82 PathProgramCache]: Analyzing trace with hash 2113593450, now seen corresponding path program 658 times [2021-06-05 04:40:51,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:40:51,110 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849606222] [2021-06-05 04:40:51,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:40:51,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:40:51,336 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:40:51,336 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:40:51,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849606222] [2021-06-05 04:40:51,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849606222] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:51,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443844476] [2021-06-05 04:40:51,336 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 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 04:40:51,361 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:40:51,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:40:51,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:40:51,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:40:51,502 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:51,503 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:51,503 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 19 treesize of output 15 [2021-06-05 04:40:51,504 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:51,506 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:51,507 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:51,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:40:51,507 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:51,510 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:51,510 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:51,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:40:51,511 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:51,514 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:51,514 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 19 treesize of output 15 [2021-06-05 04:40:51,514 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:51,570 INFO L628 ElimStorePlain]: treesize reduction 83, result has 43.5 percent of original size [2021-06-05 04:40:51,573 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:51,573 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:51,573 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 10 treesize of output 6 [2021-06-05 04:40:51,575 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:40:51,577 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:51,577 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 10 treesize of output 6 [2021-06-05 04:40:51,578 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:40:51,601 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:40:51,602 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 04:40:51,602 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:173, output treesize:38 [2021-06-05 04:40:51,697 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 04:40:51,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [443844476] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:51,697 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:40:51,697 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 04:40:51,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331447463] [2021-06-05 04:40:51,697 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 04:40:51,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:40:51,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 04:40:51,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:40:51,697 INFO L87 Difference]: Start difference. First operand 199 states and 431 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:40:52,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:40:52,221 INFO L93 Difference]: Finished difference Result 253 states and 528 transitions. [2021-06-05 04:40:52,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 04:40:52,221 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:40:52,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:40:52,221 INFO L225 Difference]: With dead ends: 253 [2021-06-05 04:40:52,222 INFO L226 Difference]: Without dead ends: 234 [2021-06-05 04:40:52,222 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 661.4ms TimeCoverageRelationStatistics Valid=120, Invalid=810, Unknown=0, NotChecked=0, Total=930 [2021-06-05 04:40:52,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-06-05 04:40:52,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 199. [2021-06-05 04:40:52,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 198 states have (on average 2.176767676767677) internal successors, (431), 198 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:40:52,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 431 transitions. [2021-06-05 04:40:52,223 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 431 transitions. Word has length 20 [2021-06-05 04:40:52,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:40:52,223 INFO L482 AbstractCegarLoop]: Abstraction has 199 states and 431 transitions. [2021-06-05 04:40:52,223 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:40:52,223 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 431 transitions. [2021-06-05 04:40:52,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:40:52,224 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:40:52,224 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:40:52,424 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3401,659 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:40:52,424 INFO L430 AbstractCegarLoop]: === Iteration 665 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:40:52,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:40:52,424 INFO L82 PathProgramCache]: Analyzing trace with hash -1312724630, now seen corresponding path program 659 times [2021-06-05 04:40:52,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:40:52,424 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459600199] [2021-06-05 04:40:52,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:40:52,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:40:52,611 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 04:40:52,612 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:40:52,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459600199] [2021-06-05 04:40:52,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459600199] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:52,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303808633] [2021-06-05 04:40:52,612 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 660 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 660 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:40:52,645 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 04:40:52,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:40:52,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:40:52,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:40:52,857 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:52,858 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:52,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:40:52,859 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:52,861 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:52,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:40:52,862 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:52,882 INFO L628 ElimStorePlain]: treesize reduction 34, result has 45.2 percent of original size [2021-06-05 04:40:52,884 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:52,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 04:40:52,898 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:40:52,905 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:40:52,906 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 04:40:52,906 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:75, output treesize:14 [2021-06-05 04:40:52,945 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:40:52,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1303808633] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:52,945 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:40:52,945 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 04:40:52,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106888505] [2021-06-05 04:40:52,945 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 04:40:52,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:40:52,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 04:40:52,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:40:52,945 INFO L87 Difference]: Start difference. First operand 199 states and 431 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:40:53,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:40:53,216 INFO L93 Difference]: Finished difference Result 220 states and 464 transitions. [2021-06-05 04:40:53,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:40:53,217 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:40:53,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:40:53,217 INFO L225 Difference]: With dead ends: 220 [2021-06-05 04:40:53,217 INFO L226 Difference]: Without dead ends: 204 [2021-06-05 04:40:53,217 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 390.0ms TimeCoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:40:53,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-06-05 04:40:53,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 202. [2021-06-05 04:40:53,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 201 states have (on average 2.174129353233831) internal successors, (437), 201 states have internal predecessors, (437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:40:53,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 437 transitions. [2021-06-05 04:40:53,218 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 437 transitions. Word has length 20 [2021-06-05 04:40:53,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:40:53,219 INFO L482 AbstractCegarLoop]: Abstraction has 202 states and 437 transitions. [2021-06-05 04:40:53,219 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:40:53,219 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 437 transitions. [2021-06-05 04:40:53,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:40:53,219 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:40:53,219 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:40:53,419 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 660 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3404 [2021-06-05 04:40:53,419 INFO L430 AbstractCegarLoop]: === Iteration 666 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:40:53,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:40:53,420 INFO L82 PathProgramCache]: Analyzing trace with hash -450719566, now seen corresponding path program 660 times [2021-06-05 04:40:53,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:40:53,420 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624862929] [2021-06-05 04:40:53,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:40:53,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:40:53,614 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 04:40:53,614 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:40:53,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624862929] [2021-06-05 04:40:53,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624862929] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:53,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200669812] [2021-06-05 04:40:53,615 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 661 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 661 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:40:53,641 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 04:40:53,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:40:53,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 04:40:53,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:40:53,829 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:53,830 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:53,830 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 19 treesize of output 15 [2021-06-05 04:40:53,830 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:53,832 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:53,833 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 19 treesize of output 15 [2021-06-05 04:40:53,833 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:53,851 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:40:53,853 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:53,853 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:53,853 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 10 treesize of output 6 [2021-06-05 04:40:53,854 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:40:53,856 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:53,856 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 13 treesize of output 9 [2021-06-05 04:40:53,858 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:40:53,874 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:40:53,875 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 04:40:53,875 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:67, output treesize:29 [2021-06-05 04:40:53,937 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 04:40:53,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [200669812] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:53,937 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:40:53,937 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 04:40:53,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448308140] [2021-06-05 04:40:53,937 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 04:40:53,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:40:53,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 04:40:53,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:40:53,938 INFO L87 Difference]: Start difference. First operand 202 states and 437 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:40:54,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:40:54,443 INFO L93 Difference]: Finished difference Result 221 states and 470 transitions. [2021-06-05 04:40:54,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:40:54,443 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:40:54,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:40:54,443 INFO L225 Difference]: With dead ends: 221 [2021-06-05 04:40:54,444 INFO L226 Difference]: Without dead ends: 208 [2021-06-05 04:40:54,444 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 563.1ms TimeCoverageRelationStatistics Valid=95, Invalid=835, Unknown=0, NotChecked=0, Total=930 [2021-06-05 04:40:54,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-06-05 04:40:54,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 203. [2021-06-05 04:40:54,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 202 states have (on average 2.1732673267326734) internal successors, (439), 202 states have internal predecessors, (439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:40:54,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 439 transitions. [2021-06-05 04:40:54,445 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 439 transitions. Word has length 20 [2021-06-05 04:40:54,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:40:54,445 INFO L482 AbstractCegarLoop]: Abstraction has 203 states and 439 transitions. [2021-06-05 04:40:54,445 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:40:54,445 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 439 transitions. [2021-06-05 04:40:54,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:40:54,446 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:40:54,446 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:40:54,646 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3408,661 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:40:54,646 INFO L430 AbstractCegarLoop]: === Iteration 667 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:40:54,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:40:54,646 INFO L82 PathProgramCache]: Analyzing trace with hash 685465706, now seen corresponding path program 661 times [2021-06-05 04:40:54,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:40:54,646 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837516365] [2021-06-05 04:40:54,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:40:54,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:40:54,819 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 04:40:54,819 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:40:54,819 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837516365] [2021-06-05 04:40:54,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837516365] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:54,819 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874863024] [2021-06-05 04:40:54,819 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 662 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 662 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:40:54,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:40:54,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:40:54,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:40:55,039 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:55,039 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:55,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:40:55,040 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:55,043 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:55,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:40:55,044 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:55,104 INFO L628 ElimStorePlain]: treesize reduction 85, result has 46.9 percent of original size [2021-06-05 04:40:55,107 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:55,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 04:40:55,108 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:40:55,132 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:40:55,134 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:55,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:40:55,135 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:55,157 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:40:55,160 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:55,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 04:40:55,161 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:40:55,182 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:40:55,184 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 04:40:55,184 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-06-05 04:40:55,267 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 04:40:55,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1874863024] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:55,267 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:40:55,267 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 04:40:55,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697419813] [2021-06-05 04:40:55,267 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 04:40:55,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:40:55,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 04:40:55,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:40:55,268 INFO L87 Difference]: Start difference. First operand 203 states and 439 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:40:55,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:40:55,569 INFO L93 Difference]: Finished difference Result 221 states and 468 transitions. [2021-06-05 04:40:55,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:40:55,569 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:40:55,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:40:55,569 INFO L225 Difference]: With dead ends: 221 [2021-06-05 04:40:55,569 INFO L226 Difference]: Without dead ends: 209 [2021-06-05 04:40:55,569 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 457.8ms TimeCoverageRelationStatistics Valid=81, Invalid=621, Unknown=0, NotChecked=0, Total=702 [2021-06-05 04:40:55,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2021-06-05 04:40:55,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 201. [2021-06-05 04:40:55,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 200 states have (on average 2.175) internal successors, (435), 200 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:40:55,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 435 transitions. [2021-06-05 04:40:55,571 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 435 transitions. Word has length 20 [2021-06-05 04:40:55,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:40:55,571 INFO L482 AbstractCegarLoop]: Abstraction has 201 states and 435 transitions. [2021-06-05 04:40:55,571 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:40:55,571 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 435 transitions. [2021-06-05 04:40:55,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:40:55,571 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:40:55,571 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:40:55,772 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3414,662 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:40:55,772 INFO L430 AbstractCegarLoop]: === Iteration 668 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:40:55,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:40:55,772 INFO L82 PathProgramCache]: Analyzing trace with hash 1737463610, now seen corresponding path program 662 times [2021-06-05 04:40:55,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:40:55,772 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998209821] [2021-06-05 04:40:55,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:40:55,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:40:55,968 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 04:40:55,968 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:40:55,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998209821] [2021-06-05 04:40:55,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998209821] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:55,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76572316] [2021-06-05 04:40:55,968 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 663 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 663 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:40:55,993 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:40:55,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:40:55,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 04:40:55,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:40:56,188 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:56,189 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 27 treesize of output 21 [2021-06-05 04:40:56,189 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:56,195 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:40:56,197 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:56,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:40:56,198 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:40:56,204 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:40:56,204 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 04:40:56,204 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:36, output treesize:13 [2021-06-05 04:40:56,245 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 04:40:56,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [76572316] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:56,245 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:40:56,246 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 04:40:56,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126769785] [2021-06-05 04:40:56,246 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 04:40:56,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:40:56,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 04:40:56,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:40:56,246 INFO L87 Difference]: Start difference. First operand 201 states and 435 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:40:56,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:40:56,662 INFO L93 Difference]: Finished difference Result 223 states and 477 transitions. [2021-06-05 04:40:56,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:40:56,662 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:40:56,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:40:56,663 INFO L225 Difference]: With dead ends: 223 [2021-06-05 04:40:56,663 INFO L226 Difference]: Without dead ends: 216 [2021-06-05 04:40:56,663 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 498.8ms TimeCoverageRelationStatistics Valid=92, Invalid=720, Unknown=0, NotChecked=0, Total=812 [2021-06-05 04:40:56,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-06-05 04:40:56,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 203. [2021-06-05 04:40:56,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 202 states have (on average 2.1782178217821784) internal successors, (440), 202 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:40:56,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 440 transitions. [2021-06-05 04:40:56,665 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 440 transitions. Word has length 20 [2021-06-05 04:40:56,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:40:56,665 INFO L482 AbstractCegarLoop]: Abstraction has 203 states and 440 transitions. [2021-06-05 04:40:56,665 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:40:56,665 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 440 transitions. [2021-06-05 04:40:56,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:40:56,665 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:40:56,665 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:40:56,868 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3419,663 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:40:56,869 INFO L430 AbstractCegarLoop]: === Iteration 669 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:40:56,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:40:56,869 INFO L82 PathProgramCache]: Analyzing trace with hash -1421318414, now seen corresponding path program 663 times [2021-06-05 04:40:56,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:40:56,869 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221590294] [2021-06-05 04:40:56,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:40:56,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:40:57,083 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 04:40:57,083 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:40:57,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221590294] [2021-06-05 04:40:57,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221590294] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:57,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1983851341] [2021-06-05 04:40:57,083 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 664 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 664 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:40:57,110 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 04:40:57,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:40:57,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:40:57,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:40:57,267 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:57,268 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:57,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:40:57,269 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:57,271 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:57,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:40:57,272 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:57,334 INFO L628 ElimStorePlain]: treesize reduction 85, result has 45.9 percent of original size [2021-06-05 04:40:57,336 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:57,337 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 10 treesize of output 6 [2021-06-05 04:40:57,338 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:40:57,361 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:40:57,363 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:57,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:40:57,364 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:57,386 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:40:57,388 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:57,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:40:57,390 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:40:57,411 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:40:57,412 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 04:40:57,412 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-06-05 04:40:57,490 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 04:40:57,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1983851341] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:57,490 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:40:57,490 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 04:40:57,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533289973] [2021-06-05 04:40:57,490 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 04:40:57,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:40:57,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 04:40:57,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:40:57,491 INFO L87 Difference]: Start difference. First operand 203 states and 440 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:40:57,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:40:57,940 INFO L93 Difference]: Finished difference Result 249 states and 514 transitions. [2021-06-05 04:40:57,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 04:40:57,941 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:40:57,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:40:57,941 INFO L225 Difference]: With dead ends: 249 [2021-06-05 04:40:57,941 INFO L226 Difference]: Without dead ends: 230 [2021-06-05 04:40:57,941 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 608.7ms TimeCoverageRelationStatistics Valid=108, Invalid=822, Unknown=0, NotChecked=0, Total=930 [2021-06-05 04:40:57,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2021-06-05 04:40:57,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 202. [2021-06-05 04:40:57,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 201 states have (on average 2.174129353233831) internal successors, (437), 201 states have internal predecessors, (437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:40:57,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 437 transitions. [2021-06-05 04:40:57,943 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 437 transitions. Word has length 20 [2021-06-05 04:40:57,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:40:57,943 INFO L482 AbstractCegarLoop]: Abstraction has 202 states and 437 transitions. [2021-06-05 04:40:57,943 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:40:57,943 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 437 transitions. [2021-06-05 04:40:57,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:40:57,943 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:40:57,943 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:40:58,143 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 664 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3422 [2021-06-05 04:40:58,144 INFO L430 AbstractCegarLoop]: === Iteration 670 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:40:58,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:40:58,144 INFO L82 PathProgramCache]: Analyzing trace with hash 727478122, now seen corresponding path program 664 times [2021-06-05 04:40:58,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:40:58,144 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796847687] [2021-06-05 04:40:58,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:40:58,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:40:58,351 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 04:40:58,352 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:40:58,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796847687] [2021-06-05 04:40:58,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796847687] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:58,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140255984] [2021-06-05 04:40:58,352 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 04:40:58,377 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:40:58,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:40:58,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:40:58,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:40:58,521 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:58,521 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:58,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:40:58,522 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:58,525 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:58,525 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:58,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:40:58,526 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:58,528 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:58,529 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:58,529 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 19 treesize of output 15 [2021-06-05 04:40:58,529 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:58,532 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:58,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:40:58,533 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:58,587 INFO L628 ElimStorePlain]: treesize reduction 80, result has 45.6 percent of original size [2021-06-05 04:40:58,589 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:58,590 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:58,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:40:58,591 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:40:58,593 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:58,593 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 13 treesize of output 9 [2021-06-05 04:40:58,594 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:40:58,617 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:40:58,618 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 04:40:58,618 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:173, output treesize:38 [2021-06-05 04:40:58,698 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 04:40:58,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2140255984] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:58,698 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:40:58,698 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 04:40:58,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380364] [2021-06-05 04:40:58,698 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 04:40:58,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:40:58,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 04:40:58,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=528, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:40:58,699 INFO L87 Difference]: Start difference. First operand 202 states and 437 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:40:59,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:40:59,158 INFO L93 Difference]: Finished difference Result 256 states and 534 transitions. [2021-06-05 04:40:59,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 04:40:59,158 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:40:59,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:40:59,158 INFO L225 Difference]: With dead ends: 256 [2021-06-05 04:40:59,158 INFO L226 Difference]: Without dead ends: 237 [2021-06-05 04:40:59,158 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 603.2ms TimeCoverageRelationStatistics Valid=114, Invalid=816, Unknown=0, NotChecked=0, Total=930 [2021-06-05 04:40:59,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2021-06-05 04:40:59,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 202. [2021-06-05 04:40:59,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 201 states have (on average 2.174129353233831) internal successors, (437), 201 states have internal predecessors, (437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:40:59,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 437 transitions. [2021-06-05 04:40:59,161 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 437 transitions. Word has length 20 [2021-06-05 04:40:59,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:40:59,161 INFO L482 AbstractCegarLoop]: Abstraction has 202 states and 437 transitions. [2021-06-05 04:40:59,161 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:40:59,161 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 437 transitions. [2021-06-05 04:40:59,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:40:59,161 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:40:59,161 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:40:59,368 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3427,665 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:40:59,369 INFO L430 AbstractCegarLoop]: === Iteration 671 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:40:59,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:40:59,369 INFO L82 PathProgramCache]: Analyzing trace with hash 851665330, now seen corresponding path program 665 times [2021-06-05 04:40:59,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:40:59,369 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731151463] [2021-06-05 04:40:59,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:40:59,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:40:59,542 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 04:40:59,542 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:40:59,542 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731151463] [2021-06-05 04:40:59,542 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731151463] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:59,542 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97165588] [2021-06-05 04:40:59,543 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 666 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 666 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:40:59,569 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 04:40:59,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:40:59,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:40:59,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:40:59,754 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:59,755 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:59,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 04:40:59,756 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:59,757 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:59,758 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 27 treesize of output 21 [2021-06-05 04:40:59,758 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:59,781 INFO L628 ElimStorePlain]: treesize reduction 40, result has 43.7 percent of original size [2021-06-05 04:40:59,782 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:40:59,782 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 21 treesize of output 13 [2021-06-05 04:40:59,783 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:59,789 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:40:59,790 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 04:40:59,790 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:83, output treesize:14 [2021-06-05 04:40:59,826 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:40:59,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [97165588] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:59,826 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:40:59,826 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 04:40:59,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158583003] [2021-06-05 04:40:59,826 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 04:40:59,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:40:59,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 04:40:59,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:40:59,826 INFO L87 Difference]: Start difference. First operand 202 states and 437 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:41:00,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:41:00,070 INFO L93 Difference]: Finished difference Result 226 states and 480 transitions. [2021-06-05 04:41:00,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:41:00,070 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:41:00,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:41:00,071 INFO L225 Difference]: With dead ends: 226 [2021-06-05 04:41:00,071 INFO L226 Difference]: Without dead ends: 213 [2021-06-05 04:41:00,071 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 380.2ms TimeCoverageRelationStatistics Valid=82, Invalid=568, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:41:00,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2021-06-05 04:41:00,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 205. [2021-06-05 04:41:00,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 204 states have (on average 2.1715686274509802) internal successors, (443), 204 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:41:00,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 443 transitions. [2021-06-05 04:41:00,072 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 443 transitions. Word has length 20 [2021-06-05 04:41:00,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:41:00,072 INFO L482 AbstractCegarLoop]: Abstraction has 205 states and 443 transitions. [2021-06-05 04:41:00,072 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:41:00,073 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 443 transitions. [2021-06-05 04:41:00,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:41:00,073 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:41:00,073 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:41:00,273 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 666 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3430 [2021-06-05 04:41:00,273 INFO L430 AbstractCegarLoop]: === Iteration 672 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:41:00,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:41:00,273 INFO L82 PathProgramCache]: Analyzing trace with hash 1987850602, now seen corresponding path program 666 times [2021-06-05 04:41:00,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:41:00,274 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74225785] [2021-06-05 04:41:00,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:41:00,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:41:00,441 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:41:00,441 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:41:00,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74225785] [2021-06-05 04:41:00,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74225785] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:00,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811605368] [2021-06-05 04:41:00,442 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 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 04:41:00,468 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 04:41:00,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:41:00,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 04:41:00,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:41:00,595 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:00,595 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:00,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:41:00,596 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:41:00,598 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:00,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:41:00,599 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:41:00,621 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:41:00,624 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:00,624 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:00,624 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 13 treesize of output 9 [2021-06-05 04:41:00,625 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:41:00,627 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:00,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 04:41:00,629 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:41:00,649 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:41:00,650 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 04:41:00,650 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:35 [2021-06-05 04:41:00,760 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 04:41:00,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [811605368] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:00,760 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:41:00,760 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 04:41:00,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039156741] [2021-06-05 04:41:00,760 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 04:41:00,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:41:00,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 04:41:00,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=483, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:41:00,760 INFO L87 Difference]: Start difference. First operand 205 states and 443 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:41:01,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:41:01,100 INFO L93 Difference]: Finished difference Result 225 states and 478 transitions. [2021-06-05 04:41:01,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:41:01,101 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:41:01,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:41:01,101 INFO L225 Difference]: With dead ends: 225 [2021-06-05 04:41:01,101 INFO L226 Difference]: Without dead ends: 215 [2021-06-05 04:41:01,101 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 434.3ms TimeCoverageRelationStatistics Valid=86, Invalid=616, Unknown=0, NotChecked=0, Total=702 [2021-06-05 04:41:01,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2021-06-05 04:41:01,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 206. [2021-06-05 04:41:01,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 205 states have (on average 2.175609756097561) internal successors, (446), 205 states have internal predecessors, (446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:41:01,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 446 transitions. [2021-06-05 04:41:01,103 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 446 transitions. Word has length 20 [2021-06-05 04:41:01,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:41:01,103 INFO L482 AbstractCegarLoop]: Abstraction has 206 states and 446 transitions. [2021-06-05 04:41:01,103 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:41:01,103 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 446 transitions. [2021-06-05 04:41:01,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:41:01,103 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:41:01,103 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:41:01,303 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3433,667 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:41:01,304 INFO L430 AbstractCegarLoop]: === Iteration 673 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:41:01,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:41:01,304 INFO L82 PathProgramCache]: Analyzing trace with hash -158320158, now seen corresponding path program 667 times [2021-06-05 04:41:01,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:41:01,304 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534190264] [2021-06-05 04:41:01,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:41:01,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:41:01,502 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 04:41:01,503 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:41:01,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534190264] [2021-06-05 04:41:01,503 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534190264] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:01,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1412578924] [2021-06-05 04:41:01,503 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 668 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 668 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:41:01,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:41:01,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:41:01,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:41:01,666 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:01,666 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:01,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:41:01,667 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:41:01,669 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:01,670 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:01,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:41:01,671 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:41:01,673 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:01,673 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:01,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:41:01,674 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:41:01,677 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:01,677 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 19 treesize of output 15 [2021-06-05 04:41:01,678 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:41:01,733 INFO L628 ElimStorePlain]: treesize reduction 90, result has 38.8 percent of original size [2021-06-05 04:41:01,736 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:01,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:41:01,737 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:41:01,761 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:41:01,762 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 04:41:01,762 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:173, output treesize:36 [2021-06-05 04:41:01,837 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:41:01,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1412578924] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:01,837 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:41:01,837 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 04:41:01,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700170343] [2021-06-05 04:41:01,837 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 04:41:01,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:41:01,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 04:41:01,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:41:01,837 INFO L87 Difference]: Start difference. First operand 206 states and 446 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:41:02,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:41:02,293 INFO L93 Difference]: Finished difference Result 257 states and 537 transitions. [2021-06-05 04:41:02,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 04:41:02,294 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:41:02,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:41:02,294 INFO L225 Difference]: With dead ends: 257 [2021-06-05 04:41:02,294 INFO L226 Difference]: Without dead ends: 238 [2021-06-05 04:41:02,294 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 657.8ms TimeCoverageRelationStatistics Valid=140, Invalid=982, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 04:41:02,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2021-06-05 04:41:02,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 206. [2021-06-05 04:41:02,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 205 states have (on average 2.175609756097561) internal successors, (446), 205 states have internal predecessors, (446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:41:02,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 446 transitions. [2021-06-05 04:41:02,296 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 446 transitions. Word has length 20 [2021-06-05 04:41:02,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:41:02,296 INFO L482 AbstractCegarLoop]: Abstraction has 206 states and 446 transitions. [2021-06-05 04:41:02,296 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:41:02,296 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 446 transitions. [2021-06-05 04:41:02,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:41:02,296 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:41:02,296 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:41:02,496 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3438,668 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:41:02,496 INFO L430 AbstractCegarLoop]: === Iteration 674 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:41:02,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:41:02,497 INFO L82 PathProgramCache]: Analyzing trace with hash 2029863018, now seen corresponding path program 668 times [2021-06-05 04:41:02,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:41:02,497 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122487657] [2021-06-05 04:41:02,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:41:02,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:41:02,717 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 04:41:02,718 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:41:02,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122487657] [2021-06-05 04:41:02,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122487657] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:02,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [879156337] [2021-06-05 04:41:02,718 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 669 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 669 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:41:02,743 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:41:02,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:41:02,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 04:41:02,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:41:02,882 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:02,883 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:02,883 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 19 treesize of output 15 [2021-06-05 04:41:02,883 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:41:02,885 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:02,886 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 19 treesize of output 15 [2021-06-05 04:41:02,886 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:41:02,909 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:41:02,911 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:02,911 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:02,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:41:02,913 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:41:02,915 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:02,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:41:02,916 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:41:02,936 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:41:02,938 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 04:41:02,938 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:35 [2021-06-05 04:41:03,018 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 04:41:03,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [879156337] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:03,019 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:41:03,019 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 04:41:03,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449648422] [2021-06-05 04:41:03,019 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 04:41:03,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:41:03,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 04:41:03,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:41:03,019 INFO L87 Difference]: Start difference. First operand 206 states and 446 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:41:03,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:41:03,752 INFO L93 Difference]: Finished difference Result 239 states and 513 transitions. [2021-06-05 04:41:03,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 04:41:03,752 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:41:03,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:41:03,753 INFO L225 Difference]: With dead ends: 239 [2021-06-05 04:41:03,753 INFO L226 Difference]: Without dead ends: 230 [2021-06-05 04:41:03,753 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 859.0ms TimeCoverageRelationStatistics Valid=149, Invalid=1257, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 04:41:03,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2021-06-05 04:41:03,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 208. [2021-06-05 04:41:03,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 207 states have (on average 2.183574879227053) internal successors, (452), 207 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:41:03,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 452 transitions. [2021-06-05 04:41:03,755 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 452 transitions. Word has length 20 [2021-06-05 04:41:03,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:41:03,755 INFO L482 AbstractCegarLoop]: Abstraction has 208 states and 452 transitions. [2021-06-05 04:41:03,755 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:41:03,755 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 452 transitions. [2021-06-05 04:41:03,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:41:03,755 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:41:03,755 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:41:03,960 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 669 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3441 [2021-06-05 04:41:03,961 INFO L430 AbstractCegarLoop]: === Iteration 675 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:41:03,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:41:03,961 INFO L82 PathProgramCache]: Analyzing trace with hash -1686900046, now seen corresponding path program 669 times [2021-06-05 04:41:03,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:41:03,961 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652825503] [2021-06-05 04:41:03,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:41:03,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:41:04,161 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:41:04,161 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:41:04,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652825503] [2021-06-05 04:41:04,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652825503] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:04,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259155805] [2021-06-05 04:41:04,161 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 670 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 670 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:41:04,203 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 04:41:04,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:41:04,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:41:04,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:41:04,397 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:04,398 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:04,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 04:41:04,399 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:41:04,401 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:04,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 04:41:04,402 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:41:04,423 INFO L628 ElimStorePlain]: treesize reduction 34, result has 42.4 percent of original size [2021-06-05 04:41:04,425 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:04,425 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 10 treesize of output 6 [2021-06-05 04:41:04,427 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:41:04,433 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:41:04,434 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:41:04,434 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:83, output treesize:14 [2021-06-05 04:41:04,471 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:41:04,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [259155805] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:04,472 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:41:04,472 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 04:41:04,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385312824] [2021-06-05 04:41:04,472 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 04:41:04,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:41:04,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 04:41:04,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:41:04,472 INFO L87 Difference]: Start difference. First operand 208 states and 452 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:41:04,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:41:04,692 INFO L93 Difference]: Finished difference Result 231 states and 493 transitions. [2021-06-05 04:41:04,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:41:04,692 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:41:04,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:41:04,692 INFO L225 Difference]: With dead ends: 231 [2021-06-05 04:41:04,692 INFO L226 Difference]: Without dead ends: 218 [2021-06-05 04:41:04,692 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 412.8ms TimeCoverageRelationStatistics Valid=77, Invalid=573, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:41:04,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2021-06-05 04:41:04,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 213. [2021-06-05 04:41:04,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 2.1792452830188678) internal successors, (462), 212 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:41:04,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 462 transitions. [2021-06-05 04:41:04,694 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 462 transitions. Word has length 20 [2021-06-05 04:41:04,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:41:04,694 INFO L482 AbstractCegarLoop]: Abstraction has 213 states and 462 transitions. [2021-06-05 04:41:04,694 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:41:04,694 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 462 transitions. [2021-06-05 04:41:04,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:41:04,694 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:41:04,694 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:41:04,895 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3444,670 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:41:04,895 INFO L430 AbstractCegarLoop]: === Iteration 676 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:41:04,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:41:04,895 INFO L82 PathProgramCache]: Analyzing trace with hash -550714774, now seen corresponding path program 670 times [2021-06-05 04:41:04,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:41:04,895 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825518391] [2021-06-05 04:41:04,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:41:04,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:41:05,121 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:41:05,121 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:41:05,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825518391] [2021-06-05 04:41:05,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825518391] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:05,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665039856] [2021-06-05 04:41:05,122 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 671 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 671 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:41:05,146 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:41:05,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:41:05,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:41:05,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:41:05,307 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:05,308 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:05,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:41:05,309 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:41:05,311 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:05,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:41:05,312 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:41:05,374 INFO L628 ElimStorePlain]: treesize reduction 85, result has 45.9 percent of original size [2021-06-05 04:41:05,376 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:05,376 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 10 treesize of output 6 [2021-06-05 04:41:05,378 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:41:05,402 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:41:05,404 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:05,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:41:05,405 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:41:05,427 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:41:05,429 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:05,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:41:05,431 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:41:05,451 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:41:05,452 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 04:41:05,452 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-06-05 04:41:05,534 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:41:05,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [665039856] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:05,534 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:41:05,534 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 04:41:05,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303882490] [2021-06-05 04:41:05,534 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 04:41:05,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:41:05,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 04:41:05,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:41:05,535 INFO L87 Difference]: Start difference. First operand 213 states and 462 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:41:05,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:41:05,892 INFO L93 Difference]: Finished difference Result 251 states and 522 transitions. [2021-06-05 04:41:05,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:41:05,892 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:41:05,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:41:05,893 INFO L225 Difference]: With dead ends: 251 [2021-06-05 04:41:05,893 INFO L226 Difference]: Without dead ends: 232 [2021-06-05 04:41:05,893 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 556.8ms TimeCoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:41:05,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2021-06-05 04:41:05,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 212. [2021-06-05 04:41:05,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 2.1800947867298577) internal successors, (460), 211 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:41:05,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 460 transitions. [2021-06-05 04:41:05,895 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 460 transitions. Word has length 20 [2021-06-05 04:41:05,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:41:05,895 INFO L482 AbstractCegarLoop]: Abstraction has 212 states and 460 transitions. [2021-06-05 04:41:05,895 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:41:05,895 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 460 transitions. [2021-06-05 04:41:05,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:41:05,895 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:41:05,895 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:41:06,095 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3447,671 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:41:06,096 INFO L430 AbstractCegarLoop]: === Iteration 677 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:41:06,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:41:06,096 INFO L82 PathProgramCache]: Analyzing trace with hash 1598081762, now seen corresponding path program 671 times [2021-06-05 04:41:06,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:41:06,096 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275139908] [2021-06-05 04:41:06,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:41:06,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:41:06,318 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:41:06,318 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:41:06,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275139908] [2021-06-05 04:41:06,319 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275139908] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:06,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2007812367] [2021-06-05 04:41:06,319 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 672 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 672 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:41:06,344 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:41:06,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:41:06,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:41:06,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:41:06,487 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:06,488 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:06,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:41:06,489 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:41:06,491 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:06,492 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:06,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:41:06,492 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:41:06,495 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:06,495 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:06,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:41:06,496 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:41:06,498 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:06,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:41:06,499 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:41:06,554 INFO L628 ElimStorePlain]: treesize reduction 83, result has 45.8 percent of original size [2021-06-05 04:41:06,557 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:06,557 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:06,557 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 13 treesize of output 9 [2021-06-05 04:41:06,559 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:41:06,561 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:06,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 04:41:06,562 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:41:06,585 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:41:06,586 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 04:41:06,586 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:173, output treesize:38 [2021-06-05 04:41:06,669 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 04:41:06,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2007812367] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:06,669 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:41:06,669 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 04:41:06,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034269157] [2021-06-05 04:41:06,669 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 04:41:06,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:41:06,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 04:41:06,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:41:06,670 INFO L87 Difference]: Start difference. First operand 212 states and 460 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:41:07,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:41:07,137 INFO L93 Difference]: Finished difference Result 261 states and 547 transitions. [2021-06-05 04:41:07,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 04:41:07,137 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:41:07,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:41:07,137 INFO L225 Difference]: With dead ends: 261 [2021-06-05 04:41:07,137 INFO L226 Difference]: Without dead ends: 242 [2021-06-05 04:41:07,137 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 670.0ms TimeCoverageRelationStatistics Valid=112, Invalid=818, Unknown=0, NotChecked=0, Total=930 [2021-06-05 04:41:07,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2021-06-05 04:41:07,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 211. [2021-06-05 04:41:07,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 210 states have (on average 2.1809523809523808) internal successors, (458), 210 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:41:07,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 458 transitions. [2021-06-05 04:41:07,139 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 458 transitions. Word has length 20 [2021-06-05 04:41:07,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:41:07,139 INFO L482 AbstractCegarLoop]: Abstraction has 211 states and 458 transitions. [2021-06-05 04:41:07,139 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:41:07,139 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 458 transitions. [2021-06-05 04:41:07,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:41:07,140 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:41:07,140 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:41:07,340 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 672 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3452 [2021-06-05 04:41:07,340 INFO L430 AbstractCegarLoop]: === Iteration 678 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:41:07,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:41:07,340 INFO L82 PathProgramCache]: Analyzing trace with hash -508702358, now seen corresponding path program 672 times [2021-06-05 04:41:07,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:41:07,340 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049191193] [2021-06-05 04:41:07,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:41:07,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:41:07,524 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:41:07,524 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:41:07,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049191193] [2021-06-05 04:41:07,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049191193] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:07,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352568507] [2021-06-05 04:41:07,524 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 673 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 673 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:41:07,550 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:41:07,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:41:07,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:41:07,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:41:07,707 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:07,708 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:07,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:41:07,709 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:41:07,711 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:07,711 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:07,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:41:07,712 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:41:07,715 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:07,715 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:07,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:41:07,716 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:41:07,718 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:07,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:41:07,719 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:41:07,774 INFO L628 ElimStorePlain]: treesize reduction 80, result has 46.7 percent of original size [2021-06-05 04:41:07,776 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:07,777 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:07,777 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 13 treesize of output 9 [2021-06-05 04:41:07,778 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:41:07,780 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:07,781 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 13 treesize of output 9 [2021-06-05 04:41:07,782 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:41:07,805 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:41:07,806 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 04:41:07,806 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:173, output treesize:38 [2021-06-05 04:41:07,885 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 04:41:07,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1352568507] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:07,885 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:41:07,885 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 04:41:07,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478655700] [2021-06-05 04:41:07,885 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 04:41:07,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:41:07,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 04:41:07,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:41:07,885 INFO L87 Difference]: Start difference. First operand 211 states and 458 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:41:08,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:41:08,245 INFO L93 Difference]: Finished difference Result 242 states and 518 transitions. [2021-06-05 04:41:08,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:41:08,246 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:41:08,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:41:08,246 INFO L225 Difference]: With dead ends: 242 [2021-06-05 04:41:08,246 INFO L226 Difference]: Without dead ends: 230 [2021-06-05 04:41:08,246 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 505.4ms TimeCoverageRelationStatistics Valid=98, Invalid=714, Unknown=0, NotChecked=0, Total=812 [2021-06-05 04:41:08,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2021-06-05 04:41:08,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 212. [2021-06-05 04:41:08,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 2.184834123222749) internal successors, (461), 211 states have internal predecessors, (461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:41:08,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 461 transitions. [2021-06-05 04:41:08,248 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 461 transitions. Word has length 20 [2021-06-05 04:41:08,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:41:08,248 INFO L482 AbstractCegarLoop]: Abstraction has 212 states and 461 transitions. [2021-06-05 04:41:08,248 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:41:08,248 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 461 transitions. [2021-06-05 04:41:08,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:41:08,248 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:41:08,248 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:41:08,448 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3455,673 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:41:08,449 INFO L430 AbstractCegarLoop]: === Iteration 679 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:41:08,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:41:08,449 INFO L82 PathProgramCache]: Analyzing trace with hash -1394500638, now seen corresponding path program 673 times [2021-06-05 04:41:08,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:41:08,449 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098186070] [2021-06-05 04:41:08,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:41:08,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:41:08,685 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:41:08,685 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:41:08,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098186070] [2021-06-05 04:41:08,686 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098186070] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:08,686 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972731366] [2021-06-05 04:41:08,686 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 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 04:41:08,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:41:08,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:41:08,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:41:08,891 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:08,892 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:08,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:41:08,893 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:41:08,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:08,896 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:08,896 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 19 treesize of output 15 [2021-06-05 04:41:08,897 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:41:08,899 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:08,899 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:08,903 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 19 treesize of output 15 [2021-06-05 04:41:08,903 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:41:08,906 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:08,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:41:08,907 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:41:08,961 INFO L628 ElimStorePlain]: treesize reduction 80, result has 45.6 percent of original size [2021-06-05 04:41:08,964 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:08,964 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:08,964 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 13 treesize of output 9 [2021-06-05 04:41:08,965 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:41:08,968 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:08,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:41:08,969 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:41:08,992 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:41:08,993 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:41:08,993 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:173, output treesize:38 [2021-06-05 04:41:09,078 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 04:41:09,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [972731366] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:09,079 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:41:09,079 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 04:41:09,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432637748] [2021-06-05 04:41:09,079 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 04:41:09,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:41:09,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 04:41:09,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:41:09,079 INFO L87 Difference]: Start difference. First operand 212 states and 461 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:41:10,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:41:10,156 INFO L93 Difference]: Finished difference Result 329 states and 666 transitions. [2021-06-05 04:41:10,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 04:41:10,156 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:41:10,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:41:10,156 INFO L225 Difference]: With dead ends: 329 [2021-06-05 04:41:10,156 INFO L226 Difference]: Without dead ends: 289 [2021-06-05 04:41:10,156 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 1172.8ms TimeCoverageRelationStatistics Valid=172, Invalid=1234, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 04:41:10,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2021-06-05 04:41:10,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 217. [2021-06-05 04:41:10,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 216 states have (on average 2.2037037037037037) internal successors, (476), 216 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:41:10,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 476 transitions. [2021-06-05 04:41:10,158 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 476 transitions. Word has length 20 [2021-06-05 04:41:10,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:41:10,158 INFO L482 AbstractCegarLoop]: Abstraction has 217 states and 476 transitions. [2021-06-05 04:41:10,158 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:41:10,158 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 476 transitions. [2021-06-05 04:41:10,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:41:10,159 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:41:10,159 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:41:10,359 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 674 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3458 [2021-06-05 04:41:10,359 INFO L430 AbstractCegarLoop]: === Iteration 680 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:41:10,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:41:10,359 INFO L82 PathProgramCache]: Analyzing trace with hash 1210523754, now seen corresponding path program 674 times [2021-06-05 04:41:10,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:41:10,359 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767656976] [2021-06-05 04:41:10,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:41:10,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:41:10,584 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:41:10,584 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:41:10,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767656976] [2021-06-05 04:41:10,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767656976] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:10,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59723334] [2021-06-05 04:41:10,584 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 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 04:41:10,610 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:41:10,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:41:10,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 04:41:10,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:41:10,771 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:10,771 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:10,772 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 19 treesize of output 15 [2021-06-05 04:41:10,772 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:41:10,774 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:10,774 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 19 treesize of output 15 [2021-06-05 04:41:10,775 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:41:10,797 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:41:10,800 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:10,800 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:10,800 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 13 treesize of output 9 [2021-06-05 04:41:10,801 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:41:10,803 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:10,804 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 13 treesize of output 9 [2021-06-05 04:41:10,805 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:41:10,825 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:41:10,826 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 04:41:10,826 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:35 [2021-06-05 04:41:10,907 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:41:10,907 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [59723334] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:10,907 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:41:10,907 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 04:41:10,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795593287] [2021-06-05 04:41:10,907 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 04:41:10,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:41:10,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 04:41:10,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:41:10,907 INFO L87 Difference]: Start difference. First operand 217 states and 476 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:41:11,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:41:11,526 INFO L93 Difference]: Finished difference Result 252 states and 547 transitions. [2021-06-05 04:41:11,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:41:11,526 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:41:11,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:41:11,526 INFO L225 Difference]: With dead ends: 252 [2021-06-05 04:41:11,526 INFO L226 Difference]: Without dead ends: 243 [2021-06-05 04:41:11,526 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 761.7ms TimeCoverageRelationStatistics Valid=117, Invalid=1073, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 04:41:11,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2021-06-05 04:41:11,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 221. [2021-06-05 04:41:11,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 220 states have (on average 2.2045454545454546) internal successors, (485), 220 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:41:11,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 485 transitions. [2021-06-05 04:41:11,528 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 485 transitions. Word has length 20 [2021-06-05 04:41:11,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:41:11,528 INFO L482 AbstractCegarLoop]: Abstraction has 221 states and 485 transitions. [2021-06-05 04:41:11,528 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:41:11,528 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 485 transitions. [2021-06-05 04:41:11,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:41:11,529 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:41:11,529 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:41:11,729 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 675 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3461 [2021-06-05 04:41:11,729 INFO L430 AbstractCegarLoop]: === Iteration 681 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:41:11,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:41:11,729 INFO L82 PathProgramCache]: Analyzing trace with hash -309493022, now seen corresponding path program 675 times [2021-06-05 04:41:11,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:41:11,729 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738774102] [2021-06-05 04:41:11,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:41:11,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:41:11,933 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 04:41:11,933 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:41:11,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738774102] [2021-06-05 04:41:11,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738774102] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:11,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945075337] [2021-06-05 04:41:11,933 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 04:41:11,958 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:41:11,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:41:11,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 04:41:11,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:41:12,153 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:12,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 04:41:12,154 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:41:12,160 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:41:12,162 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:12,162 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 21 treesize of output 13 [2021-06-05 04:41:12,162 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:41:12,168 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:41:12,169 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 04:41:12,169 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:38, output treesize:13 [2021-06-05 04:41:12,213 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:41:12,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1945075337] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:12,213 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:41:12,213 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 04:41:12,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238153928] [2021-06-05 04:41:12,213 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 04:41:12,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:41:12,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 04:41:12,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=534, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:41:12,213 INFO L87 Difference]: Start difference. First operand 221 states and 485 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:41:12,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:41:12,404 INFO L93 Difference]: Finished difference Result 247 states and 529 transitions. [2021-06-05 04:41:12,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:41:12,405 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:41:12,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:41:12,405 INFO L225 Difference]: With dead ends: 247 [2021-06-05 04:41:12,405 INFO L226 Difference]: Without dead ends: 240 [2021-06-05 04:41:12,405 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 414.1ms TimeCoverageRelationStatistics Valid=73, Invalid=577, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:41:12,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2021-06-05 04:41:12,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 222. [2021-06-05 04:41:12,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 221 states have (on average 2.2081447963800906) internal successors, (488), 221 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:41:12,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 488 transitions. [2021-06-05 04:41:12,407 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 488 transitions. Word has length 20 [2021-06-05 04:41:12,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:41:12,407 INFO L482 AbstractCegarLoop]: Abstraction has 222 states and 488 transitions. [2021-06-05 04:41:12,407 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:41:12,407 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 488 transitions. [2021-06-05 04:41:12,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:41:12,407 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:41:12,407 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:41:12,607 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3464,676 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:41:12,608 INFO L430 AbstractCegarLoop]: === Iteration 682 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:41:12,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:41:12,608 INFO L82 PathProgramCache]: Analyzing trace with hash -851314646, now seen corresponding path program 676 times [2021-06-05 04:41:12,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:41:12,608 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359702225] [2021-06-05 04:41:12,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:41:12,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:41:12,751 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:41:12,751 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:41:12,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359702225] [2021-06-05 04:41:12,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359702225] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:12,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44441376] [2021-06-05 04:41:12,752 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 04:41:12,777 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:41:12,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:41:12,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:41:12,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:41:12,975 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:12,976 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:12,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 04:41:12,977 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:41:12,979 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:12,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 04:41:12,980 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:41:13,001 INFO L628 ElimStorePlain]: treesize reduction 42, result has 39.1 percent of original size [2021-06-05 04:41:13,003 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:13,003 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 10 treesize of output 6 [2021-06-05 04:41:13,004 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:41:13,011 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:41:13,012 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 04:41:13,012 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-06-05 04:41:13,050 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 04:41:13,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [44441376] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:13,050 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:41:13,051 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 04:41:13,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339872730] [2021-06-05 04:41:13,051 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 04:41:13,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:41:13,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 04:41:13,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:41:13,051 INFO L87 Difference]: Start difference. First operand 222 states and 488 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:41:13,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:41:13,367 INFO L93 Difference]: Finished difference Result 268 states and 570 transitions. [2021-06-05 04:41:13,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:41:13,367 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:41:13,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:41:13,367 INFO L225 Difference]: With dead ends: 268 [2021-06-05 04:41:13,367 INFO L226 Difference]: Without dead ends: 249 [2021-06-05 04:41:13,368 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 436.5ms TimeCoverageRelationStatistics Valid=93, Invalid=719, Unknown=0, NotChecked=0, Total=812 [2021-06-05 04:41:13,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2021-06-05 04:41:13,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 223. [2021-06-05 04:41:13,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 222 states have (on average 2.2072072072072073) internal successors, (490), 222 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:41:13,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 490 transitions. [2021-06-05 04:41:13,369 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 490 transitions. Word has length 20 [2021-06-05 04:41:13,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:41:13,369 INFO L482 AbstractCegarLoop]: Abstraction has 223 states and 490 transitions. [2021-06-05 04:41:13,369 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:41:13,369 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 490 transitions. [2021-06-05 04:41:13,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:41:13,370 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:41:13,370 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:41:13,570 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3465,677 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:41:13,570 INFO L430 AbstractCegarLoop]: === Iteration 683 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:41:13,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:41:13,570 INFO L82 PathProgramCache]: Analyzing trace with hash 101038562, now seen corresponding path program 677 times [2021-06-05 04:41:13,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:41:13,570 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775310459] [2021-06-05 04:41:13,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:41:13,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:41:13,863 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:41:13,864 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:41:13,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775310459] [2021-06-05 04:41:13,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775310459] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:13,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429389684] [2021-06-05 04:41:13,864 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 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 04:41:13,890 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:41:13,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:41:13,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:41:13,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:41:14,095 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:14,095 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:14,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 04:41:14,096 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:41:14,098 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:14,099 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 27 treesize of output 21 [2021-06-05 04:41:14,099 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:41:14,120 INFO L628 ElimStorePlain]: treesize reduction 42, result has 39.1 percent of original size [2021-06-05 04:41:14,122 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:14,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:41:14,123 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:41:14,130 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:41:14,131 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:41:14,131 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-06-05 04:41:14,179 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:41:14,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1429389684] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:14,179 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:41:14,179 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 04:41:14,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277818326] [2021-06-05 04:41:14,180 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 04:41:14,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:41:14,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 04:41:14,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=534, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:41:14,180 INFO L87 Difference]: Start difference. First operand 223 states and 490 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:41:14,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:41:14,473 INFO L93 Difference]: Finished difference Result 253 states and 538 transitions. [2021-06-05 04:41:14,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:41:14,474 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:41:14,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:41:14,474 INFO L225 Difference]: With dead ends: 253 [2021-06-05 04:41:14,474 INFO L226 Difference]: Without dead ends: 237 [2021-06-05 04:41:14,474 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 576.3ms TimeCoverageRelationStatistics Valid=84, Invalid=672, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:41:14,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2021-06-05 04:41:14,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 224. [2021-06-05 04:41:14,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 2.2062780269058297) internal successors, (492), 223 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:41:14,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 492 transitions. [2021-06-05 04:41:14,476 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 492 transitions. Word has length 20 [2021-06-05 04:41:14,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:41:14,476 INFO L482 AbstractCegarLoop]: Abstraction has 224 states and 492 transitions. [2021-06-05 04:41:14,476 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:41:14,476 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 492 transitions. [2021-06-05 04:41:14,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:41:14,476 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:41:14,476 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:41:14,677 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 678 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3466 [2021-06-05 04:41:14,677 INFO L430 AbstractCegarLoop]: === Iteration 684 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:41:14,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:41:14,677 INFO L82 PathProgramCache]: Analyzing trace with hash 963043626, now seen corresponding path program 678 times [2021-06-05 04:41:14,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:41:14,677 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028839158] [2021-06-05 04:41:14,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:41:14,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:41:14,825 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 04:41:14,825 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:41:14,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028839158] [2021-06-05 04:41:14,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028839158] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:14,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746984130] [2021-06-05 04:41:14,826 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 679 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 679 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:41:14,851 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:41:14,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:41:14,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 04:41:14,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:41:15,062 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:15,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 04:41:15,063 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:41:15,069 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:41:15,070 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:15,071 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 21 treesize of output 13 [2021-06-05 04:41:15,071 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:41:15,077 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:41:15,077 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 04:41:15,077 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:38, output treesize:13 [2021-06-05 04:41:15,115 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 04:41:15,115 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1746984130] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:15,115 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:41:15,115 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 04:41:15,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769046532] [2021-06-05 04:41:15,115 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 04:41:15,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:41:15,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 04:41:15,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:41:15,116 INFO L87 Difference]: Start difference. First operand 224 states and 492 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:41:15,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:41:15,429 INFO L93 Difference]: Finished difference Result 262 states and 561 transitions. [2021-06-05 04:41:15,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:41:15,430 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:41:15,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:41:15,430 INFO L225 Difference]: With dead ends: 262 [2021-06-05 04:41:15,430 INFO L226 Difference]: Without dead ends: 255 [2021-06-05 04:41:15,430 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 451.5ms TimeCoverageRelationStatistics Valid=93, Invalid=719, Unknown=0, NotChecked=0, Total=812 [2021-06-05 04:41:15,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2021-06-05 04:41:15,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 225. [2021-06-05 04:41:15,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 2.2098214285714284) internal successors, (495), 224 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:41:15,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 495 transitions. [2021-06-05 04:41:15,432 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 495 transitions. Word has length 20 [2021-06-05 04:41:15,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:41:15,432 INFO L482 AbstractCegarLoop]: Abstraction has 225 states and 495 transitions. [2021-06-05 04:41:15,432 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:41:15,432 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 495 transitions. [2021-06-05 04:41:15,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:41:15,432 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:41:15,432 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:41:15,632 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3467,679 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:41:15,633 INFO L430 AbstractCegarLoop]: === Iteration 685 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:41:15,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:41:15,633 INFO L82 PathProgramCache]: Analyzing trace with hash 2099228898, now seen corresponding path program 679 times [2021-06-05 04:41:15,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:41:15,633 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314538498] [2021-06-05 04:41:15,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:41:15,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:41:15,893 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:41:15,893 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:41:15,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314538498] [2021-06-05 04:41:15,894 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314538498] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:15,894 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822392803] [2021-06-05 04:41:15,894 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 680 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 680 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:41:15,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:41:15,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:41:15,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:41:16,132 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:16,132 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:16,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:41:16,133 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:41:16,136 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:16,136 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:16,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:41:16,137 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:41:16,140 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:16,140 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:16,141 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 19 treesize of output 15 [2021-06-05 04:41:16,141 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:41:16,144 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:16,144 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 19 treesize of output 15 [2021-06-05 04:41:16,145 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:41:16,199 INFO L628 ElimStorePlain]: treesize reduction 80, result has 45.6 percent of original size [2021-06-05 04:41:16,202 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:16,202 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:16,203 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 10 treesize of output 6 [2021-06-05 04:41:16,204 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:41:16,206 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:16,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 04:41:16,208 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:41:16,231 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:41:16,232 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 04:41:16,232 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:173, output treesize:38 [2021-06-05 04:41:16,320 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 04:41:16,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1822392803] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:16,321 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:41:16,321 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 04:41:16,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487537600] [2021-06-05 04:41:16,321 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 04:41:16,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:41:16,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 04:41:16,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=534, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:41:16,321 INFO L87 Difference]: Start difference. First operand 225 states and 495 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:41:16,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:41:16,832 INFO L93 Difference]: Finished difference Result 281 states and 586 transitions. [2021-06-05 04:41:16,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:41:16,833 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:41:16,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:41:16,833 INFO L225 Difference]: With dead ends: 281 [2021-06-05 04:41:16,833 INFO L226 Difference]: Without dead ends: 262 [2021-06-05 04:41:16,833 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 762.0ms TimeCoverageRelationStatistics Valid=105, Invalid=825, Unknown=0, NotChecked=0, Total=930 [2021-06-05 04:41:16,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-06-05 04:41:16,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 221. [2021-06-05 04:41:16,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 220 states have (on average 2.2045454545454546) internal successors, (485), 220 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:41:16,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 485 transitions. [2021-06-05 04:41:16,835 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 485 transitions. Word has length 20 [2021-06-05 04:41:16,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:41:16,835 INFO L482 AbstractCegarLoop]: Abstraction has 221 states and 485 transitions. [2021-06-05 04:41:16,835 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:41:16,835 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 485 transitions. [2021-06-05 04:41:16,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:41:16,835 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:41:16,835 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:41:17,036 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3468,680 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:41:17,036 INFO L430 AbstractCegarLoop]: === Iteration 686 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:41:17,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:41:17,036 INFO L82 PathProgramCache]: Analyzing trace with hash 1753709746, now seen corresponding path program 680 times [2021-06-05 04:41:17,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:41:17,036 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365765563] [2021-06-05 04:41:17,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:41:17,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:41:17,244 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 04:41:17,244 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:41:17,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365765563] [2021-06-05 04:41:17,244 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365765563] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:17,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257051281] [2021-06-05 04:41:17,244 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 681 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 681 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:41:17,270 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:41:17,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:41:17,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 04:41:17,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:41:17,456 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:17,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 04:41:17,458 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:41:17,464 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:41:17,466 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:17,466 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 21 treesize of output 13 [2021-06-05 04:41:17,467 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:41:17,472 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:41:17,473 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 04:41:17,473 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:38, output treesize:13 [2021-06-05 04:41:17,515 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:41:17,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [257051281] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:17,515 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:41:17,515 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 04:41:17,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915955212] [2021-06-05 04:41:17,516 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 04:41:17,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:41:17,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 04:41:17,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=534, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:41:17,516 INFO L87 Difference]: Start difference. First operand 221 states and 485 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:41:17,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:41:17,787 INFO L93 Difference]: Finished difference Result 245 states and 526 transitions. [2021-06-05 04:41:17,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:41:17,787 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:41:17,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:41:17,788 INFO L225 Difference]: With dead ends: 245 [2021-06-05 04:41:17,788 INFO L226 Difference]: Without dead ends: 238 [2021-06-05 04:41:17,788 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 437.9ms TimeCoverageRelationStatistics Valid=78, Invalid=624, Unknown=0, NotChecked=0, Total=702 [2021-06-05 04:41:17,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2021-06-05 04:41:17,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 223. [2021-06-05 04:41:17,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 222 states have (on average 2.2072072072072073) internal successors, (490), 222 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:41:17,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 490 transitions. [2021-06-05 04:41:17,790 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 490 transitions. Word has length 20 [2021-06-05 04:41:17,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:41:17,790 INFO L482 AbstractCegarLoop]: Abstraction has 223 states and 490 transitions. [2021-06-05 04:41:17,790 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:41:17,790 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 490 transitions. [2021-06-05 04:41:17,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:41:17,790 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:41:17,790 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:41:17,990 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3471,681 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:41:17,990 INFO L430 AbstractCegarLoop]: === Iteration 687 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:41:17,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:41:17,991 INFO L82 PathProgramCache]: Analyzing trace with hash -1588904342, now seen corresponding path program 681 times [2021-06-05 04:41:17,991 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:41:17,991 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362646904] [2021-06-05 04:41:17,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:41:17,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:41:18,246 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 04:41:18,246 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:41:18,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362646904] [2021-06-05 04:41:18,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362646904] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:18,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206039087] [2021-06-05 04:41:18,246 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 682 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 682 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:41:18,273 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:41:18,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:41:18,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:41:18,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:41:18,473 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:18,474 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:18,474 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 27 treesize of output 21 [2021-06-05 04:41:18,475 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:41:18,477 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:18,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 04:41:18,478 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:41:18,499 INFO L628 ElimStorePlain]: treesize reduction 42, result has 39.1 percent of original size [2021-06-05 04:41:18,501 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:18,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:41:18,503 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:41:18,510 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:41:18,510 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 04:41:18,510 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-06-05 04:41:18,552 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:41:18,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1206039087] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:18,552 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:41:18,553 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 04:41:18,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815140710] [2021-06-05 04:41:18,553 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 04:41:18,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:41:18,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 04:41:18,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:41:18,553 INFO L87 Difference]: Start difference. First operand 223 states and 490 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:41:18,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:41:18,834 INFO L93 Difference]: Finished difference Result 249 states and 531 transitions. [2021-06-05 04:41:18,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:41:18,834 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:41:18,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:41:18,834 INFO L225 Difference]: With dead ends: 249 [2021-06-05 04:41:18,834 INFO L226 Difference]: Without dead ends: 233 [2021-06-05 04:41:18,834 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 557.0ms TimeCoverageRelationStatistics Valid=91, Invalid=721, Unknown=0, NotChecked=0, Total=812 [2021-06-05 04:41:18,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2021-06-05 04:41:18,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 224. [2021-06-05 04:41:18,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 2.2062780269058297) internal successors, (492), 223 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:41:18,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 492 transitions. [2021-06-05 04:41:18,836 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 492 transitions. Word has length 20 [2021-06-05 04:41:18,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:41:18,836 INFO L482 AbstractCegarLoop]: Abstraction has 224 states and 492 transitions. [2021-06-05 04:41:18,836 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:41:18,836 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 492 transitions. [2021-06-05 04:41:18,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:41:18,836 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:41:18,836 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:41:19,037 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 682 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3472 [2021-06-05 04:41:19,037 INFO L430 AbstractCegarLoop]: === Iteration 688 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:41:19,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:41:19,037 INFO L82 PathProgramCache]: Analyzing trace with hash -726899278, now seen corresponding path program 682 times [2021-06-05 04:41:19,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:41:19,037 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241672350] [2021-06-05 04:41:19,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:41:19,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:41:19,223 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 04:41:19,223 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:41:19,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241672350] [2021-06-05 04:41:19,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241672350] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:19,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229943798] [2021-06-05 04:41:19,223 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 683 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 683 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:41:19,248 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:41:19,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:41:19,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:41:19,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:41:19,448 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:19,449 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:19,449 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 27 treesize of output 21 [2021-06-05 04:41:19,450 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:41:19,452 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:19,452 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 27 treesize of output 21 [2021-06-05 04:41:19,453 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:41:19,475 INFO L628 ElimStorePlain]: treesize reduction 36, result has 47.8 percent of original size [2021-06-05 04:41:19,477 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:19,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 04:41:19,478 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:41:19,485 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:41:19,485 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 04:41:19,486 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-06-05 04:41:19,530 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 04:41:19,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1229943798] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:19,530 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:41:19,530 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 04:41:19,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543011863] [2021-06-05 04:41:19,530 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 04:41:19,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:41:19,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 04:41:19,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=534, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:41:19,531 INFO L87 Difference]: Start difference. First operand 224 states and 492 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:41:19,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:41:19,974 INFO L93 Difference]: Finished difference Result 257 states and 549 transitions. [2021-06-05 04:41:19,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:41:19,974 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:41:19,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:41:19,975 INFO L225 Difference]: With dead ends: 257 [2021-06-05 04:41:19,975 INFO L226 Difference]: Without dead ends: 244 [2021-06-05 04:41:19,975 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 570.2ms TimeCoverageRelationStatistics Valid=101, Invalid=829, Unknown=0, NotChecked=0, Total=930 [2021-06-05 04:41:19,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2021-06-05 04:41:19,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 225. [2021-06-05 04:41:19,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 2.205357142857143) internal successors, (494), 224 states have internal predecessors, (494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:41:19,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 494 transitions. [2021-06-05 04:41:19,976 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 494 transitions. Word has length 20 [2021-06-05 04:41:19,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:41:19,977 INFO L482 AbstractCegarLoop]: Abstraction has 225 states and 494 transitions. [2021-06-05 04:41:19,977 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:41:19,977 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 494 transitions. [2021-06-05 04:41:19,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:41:19,977 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:41:19,977 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:41:20,177 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 683 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3473 [2021-06-05 04:41:20,177 INFO L430 AbstractCegarLoop]: === Iteration 689 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:41:20,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:41:20,177 INFO L82 PathProgramCache]: Analyzing trace with hash 409285994, now seen corresponding path program 683 times [2021-06-05 04:41:20,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:41:20,178 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629941370] [2021-06-05 04:41:20,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:41:20,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:41:20,378 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 04:41:20,378 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:41:20,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629941370] [2021-06-05 04:41:20,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629941370] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:20,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2129342897] [2021-06-05 04:41:20,379 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 684 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 684 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:41:20,404 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:41:20,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:41:20,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:41:20,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:41:20,577 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:20,577 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:20,578 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 19 treesize of output 15 [2021-06-05 04:41:20,578 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:41:20,581 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:20,581 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:20,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:41:20,582 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:41:20,584 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:20,585 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:20,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:41:20,586 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:41:20,588 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:20,600 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 19 treesize of output 15 [2021-06-05 04:41:20,602 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:41:20,666 INFO L628 ElimStorePlain]: treesize reduction 77, result has 45.4 percent of original size [2021-06-05 04:41:20,668 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:20,669 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:20,669 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 10 treesize of output 6 [2021-06-05 04:41:20,670 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:41:20,672 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:20,673 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 10 treesize of output 6 [2021-06-05 04:41:20,674 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:41:20,696 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:41:20,697 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 04:41:20,697 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:173, output treesize:38 [2021-06-05 04:41:20,781 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 04:41:20,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2129342897] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:20,781 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:41:20,781 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 04:41:20,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853837153] [2021-06-05 04:41:20,781 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 04:41:20,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:41:20,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 04:41:20,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:41:20,782 INFO L87 Difference]: Start difference. First operand 225 states and 494 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:41:21,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:41:21,217 INFO L93 Difference]: Finished difference Result 277 states and 578 transitions. [2021-06-05 04:41:21,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:41:21,217 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:41:21,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:41:21,217 INFO L225 Difference]: With dead ends: 277 [2021-06-05 04:41:21,217 INFO L226 Difference]: Without dead ends: 258 [2021-06-05 04:41:21,217 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 560.6ms TimeCoverageRelationStatistics Valid=106, Invalid=824, Unknown=0, NotChecked=0, Total=930 [2021-06-05 04:41:21,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2021-06-05 04:41:21,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 222. [2021-06-05 04:41:21,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 221 states have (on average 2.2036199095022626) internal successors, (487), 221 states have internal predecessors, (487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:41:21,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 487 transitions. [2021-06-05 04:41:21,219 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 487 transitions. Word has length 20 [2021-06-05 04:41:21,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:41:21,219 INFO L482 AbstractCegarLoop]: Abstraction has 222 states and 487 transitions. [2021-06-05 04:41:21,219 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:41:21,219 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 487 transitions. [2021-06-05 04:41:21,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:41:21,219 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:41:21,219 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:41:21,420 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 684 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3474 [2021-06-05 04:41:21,420 INFO L430 AbstractCegarLoop]: === Iteration 690 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:41:21,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:41:21,420 INFO L82 PathProgramCache]: Analyzing trace with hash 1820264674, now seen corresponding path program 684 times [2021-06-05 04:41:21,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:41:21,420 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259691781] [2021-06-05 04:41:21,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:41:21,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:41:21,630 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 04:41:21,630 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:41:21,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259691781] [2021-06-05 04:41:21,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259691781] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:21,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578986824] [2021-06-05 04:41:21,630 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 685 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 685 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:41:21,656 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:41:21,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:41:21,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:41:21,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:41:21,827 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:21,828 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:21,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 04:41:21,829 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:41:21,831 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:21,831 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 27 treesize of output 21 [2021-06-05 04:41:21,832 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:41:21,854 INFO L628 ElimStorePlain]: treesize reduction 36, result has 42.9 percent of original size [2021-06-05 04:41:21,855 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:21,856 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 10 treesize of output 6 [2021-06-05 04:41:21,857 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:41:21,864 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:41:21,864 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 04:41:21,864 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-06-05 04:41:21,905 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:41:21,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1578986824] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:21,905 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:41:21,905 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 04:41:21,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173627055] [2021-06-05 04:41:21,905 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 04:41:21,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:41:21,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 04:41:21,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:41:21,906 INFO L87 Difference]: Start difference. First operand 222 states and 487 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:41:22,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:41:22,098 INFO L93 Difference]: Finished difference Result 244 states and 522 transitions. [2021-06-05 04:41:22,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:41:22,098 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:41:22,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:41:22,098 INFO L225 Difference]: With dead ends: 244 [2021-06-05 04:41:22,098 INFO L226 Difference]: Without dead ends: 228 [2021-06-05 04:41:22,098 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 428.6ms TimeCoverageRelationStatistics Valid=82, Invalid=620, Unknown=0, NotChecked=0, Total=702 [2021-06-05 04:41:22,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2021-06-05 04:41:22,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 224. [2021-06-05 04:41:22,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 2.201793721973094) internal successors, (491), 223 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:41:22,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 491 transitions. [2021-06-05 04:41:22,100 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 491 transitions. Word has length 20 [2021-06-05 04:41:22,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:41:22,101 INFO L482 AbstractCegarLoop]: Abstraction has 224 states and 491 transitions. [2021-06-05 04:41:22,101 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:41:22,101 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 491 transitions. [2021-06-05 04:41:22,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:41:22,101 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:41:22,101 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:41:22,312 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3477,685 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:41:22,313 INFO L430 AbstractCegarLoop]: === Iteration 691 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:41:22,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:41:22,313 INFO L82 PathProgramCache]: Analyzing trace with hash -1612697558, now seen corresponding path program 685 times [2021-06-05 04:41:22,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:41:22,313 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8870732] [2021-06-05 04:41:22,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:41:22,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:41:22,511 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 04:41:22,511 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:41:22,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8870732] [2021-06-05 04:41:22,511 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8870732] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:22,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037947548] [2021-06-05 04:41:22,511 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 686 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 686 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:41:22,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:41:22,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:41:22,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:41:22,727 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:22,728 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:22,728 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 27 treesize of output 21 [2021-06-05 04:41:22,729 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:41:22,731 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:22,731 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 27 treesize of output 21 [2021-06-05 04:41:22,732 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:41:22,758 INFO L628 ElimStorePlain]: treesize reduction 36, result has 47.8 percent of original size [2021-06-05 04:41:22,760 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:22,760 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 21 treesize of output 13 [2021-06-05 04:41:22,761 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:41:22,768 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:41:22,769 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 04:41:22,769 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-06-05 04:41:22,811 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:41:22,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2037947548] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:22,811 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:41:22,811 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 04:41:22,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938352839] [2021-06-05 04:41:22,811 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 04:41:22,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:41:22,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 04:41:22,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:41:22,812 INFO L87 Difference]: Start difference. First operand 224 states and 491 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:41:23,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:41:23,184 INFO L93 Difference]: Finished difference Result 246 states and 530 transitions. [2021-06-05 04:41:23,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:41:23,184 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:41:23,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:41:23,184 INFO L225 Difference]: With dead ends: 246 [2021-06-05 04:41:23,184 INFO L226 Difference]: Without dead ends: 233 [2021-06-05 04:41:23,184 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 520.9ms TimeCoverageRelationStatistics Valid=98, Invalid=772, Unknown=0, NotChecked=0, Total=870 [2021-06-05 04:41:23,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2021-06-05 04:41:23,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 225. [2021-06-05 04:41:23,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 2.200892857142857) internal successors, (493), 224 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:41:23,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 493 transitions. [2021-06-05 04:41:23,186 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 493 transitions. Word has length 20 [2021-06-05 04:41:23,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:41:23,186 INFO L482 AbstractCegarLoop]: Abstraction has 225 states and 493 transitions. [2021-06-05 04:41:23,186 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:41:23,186 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 493 transitions. [2021-06-05 04:41:23,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:41:23,187 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:41:23,187 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:41:23,387 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3478,686 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:41:23,387 INFO L430 AbstractCegarLoop]: === Iteration 692 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:41:23,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:41:23,387 INFO L82 PathProgramCache]: Analyzing trace with hash -476512286, now seen corresponding path program 686 times [2021-06-05 04:41:23,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:41:23,387 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710455722] [2021-06-05 04:41:23,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:41:23,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:41:23,583 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:41:23,584 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:41:23,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710455722] [2021-06-05 04:41:23,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710455722] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:23,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556966578] [2021-06-05 04:41:23,584 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 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 04:41:23,609 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:41:23,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:41:23,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 04:41:23,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:41:23,762 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:23,763 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:23,763 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 19 treesize of output 15 [2021-06-05 04:41:23,764 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:41:23,766 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:23,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:41:23,767 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:41:23,789 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:41:23,791 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:23,791 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:23,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:41:23,792 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:41:23,794 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:23,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:41:23,796 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:41:23,816 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:41:23,816 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 04:41:23,817 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:35 [2021-06-05 04:41:23,894 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 04:41:23,894 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1556966578] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:23,894 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:41:23,894 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 04:41:23,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181322496] [2021-06-05 04:41:23,894 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 04:41:23,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:41:23,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 04:41:23,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:41:23,894 INFO L87 Difference]: Start difference. First operand 225 states and 493 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:41:24,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:41:24,318 INFO L93 Difference]: Finished difference Result 266 states and 562 transitions. [2021-06-05 04:41:24,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:41:24,318 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:41:24,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:41:24,319 INFO L225 Difference]: With dead ends: 266 [2021-06-05 04:41:24,319 INFO L226 Difference]: Without dead ends: 250 [2021-06-05 04:41:24,319 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 558.7ms TimeCoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-06-05 04:41:24,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2021-06-05 04:41:24,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 224. [2021-06-05 04:41:24,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 2.201793721973094) internal successors, (491), 223 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:41:24,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 491 transitions. [2021-06-05 04:41:24,321 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 491 transitions. Word has length 20 [2021-06-05 04:41:24,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:41:24,321 INFO L482 AbstractCegarLoop]: Abstraction has 224 states and 491 transitions. [2021-06-05 04:41:24,321 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:41:24,321 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 491 transitions. [2021-06-05 04:41:24,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:41:24,321 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:41:24,321 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:41:24,521 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3479,687 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:41:24,521 INFO L430 AbstractCegarLoop]: === Iteration 693 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:41:24,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:41:24,522 INFO L82 PathProgramCache]: Analyzing trace with hash 575485618, now seen corresponding path program 687 times [2021-06-05 04:41:24,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:41:24,522 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258064714] [2021-06-05 04:41:24,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:41:24,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:41:24,717 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 04:41:24,717 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:41:24,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258064714] [2021-06-05 04:41:24,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258064714] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:24,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805440567] [2021-06-05 04:41:24,717 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 04:41:24,744 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:41:24,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:41:24,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:41:24,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:41:24,919 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:24,919 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:24,920 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 27 treesize of output 21 [2021-06-05 04:41:24,921 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:41:24,923 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:24,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 04:41:24,924 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:41:24,947 INFO L628 ElimStorePlain]: treesize reduction 42, result has 44.0 percent of original size [2021-06-05 04:41:24,949 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:24,949 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 21 treesize of output 13 [2021-06-05 04:41:24,950 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:41:24,956 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:41:24,957 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 04:41:24,957 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-06-05 04:41:24,998 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 04:41:24,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1805440567] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:24,998 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:41:24,998 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 04:41:24,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197975617] [2021-06-05 04:41:24,998 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 04:41:24,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:41:24,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 04:41:24,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:41:24,999 INFO L87 Difference]: Start difference. First operand 224 states and 491 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:41:25,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:41:25,320 INFO L93 Difference]: Finished difference Result 247 states and 532 transitions. [2021-06-05 04:41:25,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:41:25,320 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:41:25,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:41:25,320 INFO L225 Difference]: With dead ends: 247 [2021-06-05 04:41:25,320 INFO L226 Difference]: Without dead ends: 234 [2021-06-05 04:41:25,320 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 453.6ms TimeCoverageRelationStatistics Valid=88, Invalid=668, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:41:25,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-06-05 04:41:25,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 226. [2021-06-05 04:41:25,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 225 states have (on average 2.2) internal successors, (495), 225 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:41:25,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 495 transitions. [2021-06-05 04:41:25,322 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 495 transitions. Word has length 20 [2021-06-05 04:41:25,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:41:25,322 INFO L482 AbstractCegarLoop]: Abstraction has 226 states and 495 transitions. [2021-06-05 04:41:25,322 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:41:25,322 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 495 transitions. [2021-06-05 04:41:25,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:41:25,322 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:41:25,322 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:41:25,523 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3482,688 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:41:25,523 INFO L430 AbstractCegarLoop]: === Iteration 694 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:41:25,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:41:25,523 INFO L82 PathProgramCache]: Analyzing trace with hash 1711670890, now seen corresponding path program 688 times [2021-06-05 04:41:25,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:41:25,523 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148263207] [2021-06-05 04:41:25,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:41:25,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:41:25,742 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 04:41:25,742 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:41:25,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148263207] [2021-06-05 04:41:25,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148263207] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:25,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761498048] [2021-06-05 04:41:25,742 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 689 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 689 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:41:25,767 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:41:25,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:41:25,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:41:25,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:41:25,908 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:25,909 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:25,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:41:25,910 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:41:25,912 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:25,913 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:25,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:41:25,913 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:41:25,916 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:25,916 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:25,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:41:25,917 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:41:25,919 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:25,920 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 19 treesize of output 15 [2021-06-05 04:41:25,920 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:41:25,974 INFO L628 ElimStorePlain]: treesize reduction 80, result has 44.4 percent of original size [2021-06-05 04:41:25,976 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:25,977 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:25,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:41:25,978 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:41:25,980 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:25,981 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 10 treesize of output 6 [2021-06-05 04:41:25,982 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:41:26,004 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:41:26,005 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:41:26,005 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:173, output treesize:38 [2021-06-05 04:41:26,090 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:41:26,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [761498048] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:26,090 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:41:26,090 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 04:41:26,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162083105] [2021-06-05 04:41:26,090 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 04:41:26,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:41:26,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 04:41:26,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:41:26,090 INFO L87 Difference]: Start difference. First operand 226 states and 495 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:41:26,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:41:26,538 INFO L93 Difference]: Finished difference Result 268 states and 563 transitions. [2021-06-05 04:41:26,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 04:41:26,538 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:41:26,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:41:26,539 INFO L225 Difference]: With dead ends: 268 [2021-06-05 04:41:26,539 INFO L226 Difference]: Without dead ends: 249 [2021-06-05 04:41:26,539 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 617.9ms TimeCoverageRelationStatistics Valid=103, Invalid=767, Unknown=0, NotChecked=0, Total=870 [2021-06-05 04:41:26,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2021-06-05 04:41:26,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 225. [2021-06-05 04:41:26,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 2.200892857142857) internal successors, (493), 224 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:41:26,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 493 transitions. [2021-06-05 04:41:26,541 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 493 transitions. Word has length 20 [2021-06-05 04:41:26,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:41:26,541 INFO L482 AbstractCegarLoop]: Abstraction has 225 states and 493 transitions. [2021-06-05 04:41:26,541 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:41:26,541 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 493 transitions. [2021-06-05 04:41:26,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:41:26,541 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:41:26,541 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:41:26,741 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 689 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3483 [2021-06-05 04:41:26,741 INFO L430 AbstractCegarLoop]: === Iteration 695 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:41:26,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:41:26,742 INFO L82 PathProgramCache]: Analyzing trace with hash -434499870, now seen corresponding path program 689 times [2021-06-05 04:41:26,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:41:26,742 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342309476] [2021-06-05 04:41:26,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:41:26,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:41:26,974 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 04:41:26,974 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:41:26,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342309476] [2021-06-05 04:41:26,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342309476] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:26,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191696478] [2021-06-05 04:41:26,975 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 690 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 690 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:41:27,001 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 04:41:27,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:41:27,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:41:27,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:41:27,162 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:27,163 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:27,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:41:27,164 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:41:27,166 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:27,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:41:27,167 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:41:27,228 INFO L628 ElimStorePlain]: treesize reduction 88, result has 45.0 percent of original size [2021-06-05 04:41:27,230 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:27,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:41:27,232 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:41:27,255 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:41:27,258 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:27,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:41:27,259 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:41:27,280 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:41:27,283 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:27,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:41:27,284 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:41:27,305 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:41:27,306 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 04:41:27,306 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-06-05 04:41:27,387 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:41:27,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [191696478] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:27,387 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:41:27,387 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 04:41:27,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489765343] [2021-06-05 04:41:27,387 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 04:41:27,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:41:27,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 04:41:27,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:41:27,388 INFO L87 Difference]: Start difference. First operand 225 states and 493 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:41:27,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:41:27,803 INFO L93 Difference]: Finished difference Result 279 states and 590 transitions. [2021-06-05 04:41:27,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 04:41:27,803 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:41:27,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:41:27,803 INFO L225 Difference]: With dead ends: 279 [2021-06-05 04:41:27,804 INFO L226 Difference]: Without dead ends: 260 [2021-06-05 04:41:27,804 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 601.8ms TimeCoverageRelationStatistics Valid=99, Invalid=713, Unknown=0, NotChecked=0, Total=812 [2021-06-05 04:41:27,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2021-06-05 04:41:27,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 224. [2021-06-05 04:41:27,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 2.201793721973094) internal successors, (491), 223 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:41:27,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 491 transitions. [2021-06-05 04:41:27,806 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 491 transitions. Word has length 20 [2021-06-05 04:41:27,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:41:27,806 INFO L482 AbstractCegarLoop]: Abstraction has 224 states and 491 transitions. [2021-06-05 04:41:27,806 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:41:27,806 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 491 transitions. [2021-06-05 04:41:27,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:41:27,806 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:41:27,806 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:41:28,006 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3486,690 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:41:28,006 INFO L430 AbstractCegarLoop]: === Iteration 696 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:41:28,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:41:28,007 INFO L82 PathProgramCache]: Analyzing trace with hash 905087274, now seen corresponding path program 690 times [2021-06-05 04:41:28,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:41:28,007 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957516437] [2021-06-05 04:41:28,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:41:28,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:41:28,198 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 04:41:28,198 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:41:28,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957516437] [2021-06-05 04:41:28,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957516437] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:28,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623839596] [2021-06-05 04:41:28,199 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 691 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 691 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:41:28,224 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:41:28,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:41:28,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 04:41:28,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:41:28,402 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:28,402 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 27 treesize of output 21 [2021-06-05 04:41:28,403 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:41:28,411 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:41:28,412 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:28,413 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 21 treesize of output 13 [2021-06-05 04:41:28,413 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:41:28,419 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:41:28,420 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:41:28,420 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:38, output treesize:13 [2021-06-05 04:41:28,462 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 04:41:28,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [623839596] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:28,462 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:41:28,462 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 04:41:28,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102021543] [2021-06-05 04:41:28,462 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 04:41:28,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:41:28,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 04:41:28,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:41:28,462 INFO L87 Difference]: Start difference. First operand 224 states and 491 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:41:28,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:41:28,762 INFO L93 Difference]: Finished difference Result 248 states and 532 transitions. [2021-06-05 04:41:28,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:41:28,763 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:41:28,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:41:28,763 INFO L225 Difference]: With dead ends: 248 [2021-06-05 04:41:28,763 INFO L226 Difference]: Without dead ends: 241 [2021-06-05 04:41:28,763 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 421.2ms TimeCoverageRelationStatistics Valid=78, Invalid=624, Unknown=0, NotChecked=0, Total=702 [2021-06-05 04:41:28,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2021-06-05 04:41:28,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 226. [2021-06-05 04:41:28,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 225 states have (on average 2.2044444444444444) internal successors, (496), 225 states have internal predecessors, (496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:41:28,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 496 transitions. [2021-06-05 04:41:28,765 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 496 transitions. Word has length 20 [2021-06-05 04:41:28,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:41:28,765 INFO L482 AbstractCegarLoop]: Abstraction has 226 states and 496 transitions. [2021-06-05 04:41:28,765 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:41:28,765 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 496 transitions. [2021-06-05 04:41:28,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:41:28,765 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:41:28,765 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:41:28,966 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3491,691 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:41:28,966 INFO L430 AbstractCegarLoop]: === Iteration 697 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:41:28,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:41:28,966 INFO L82 PathProgramCache]: Analyzing trace with hash 1857440482, now seen corresponding path program 691 times [2021-06-05 04:41:28,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:41:28,966 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220793628] [2021-06-05 04:41:28,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:41:28,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:41:29,140 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 04:41:29,140 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:41:29,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220793628] [2021-06-05 04:41:29,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220793628] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:29,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757280233] [2021-06-05 04:41:29,140 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 692 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 692 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:41:29,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:41:29,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:41:29,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:41:29,355 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:29,355 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:29,355 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 27 treesize of output 21 [2021-06-05 04:41:29,356 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:41:29,358 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:29,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 04:41:29,359 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:41:29,382 INFO L628 ElimStorePlain]: treesize reduction 48, result has 36.0 percent of original size [2021-06-05 04:41:29,384 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:29,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:41:29,385 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:41:29,392 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:41:29,393 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 04:41:29,393 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-06-05 04:41:29,435 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:41:29,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [757280233] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:29,436 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:41:29,436 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 04:41:29,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849982695] [2021-06-05 04:41:29,436 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 04:41:29,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:41:29,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 04:41:29,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:41:29,436 INFO L87 Difference]: Start difference. First operand 226 states and 496 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:41:29,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:41:29,752 INFO L93 Difference]: Finished difference Result 252 states and 537 transitions. [2021-06-05 04:41:29,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:41:29,752 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:41:29,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:41:29,753 INFO L225 Difference]: With dead ends: 252 [2021-06-05 04:41:29,753 INFO L226 Difference]: Without dead ends: 236 [2021-06-05 04:41:29,753 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 466.3ms TimeCoverageRelationStatistics Valid=85, Invalid=671, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:41:29,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-06-05 04:41:29,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 227. [2021-06-05 04:41:29,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 226 states have (on average 2.2035398230088497) internal successors, (498), 226 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:41:29,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 498 transitions. [2021-06-05 04:41:29,755 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 498 transitions. Word has length 20 [2021-06-05 04:41:29,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:41:29,755 INFO L482 AbstractCegarLoop]: Abstraction has 227 states and 498 transitions. [2021-06-05 04:41:29,755 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:41:29,755 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 498 transitions. [2021-06-05 04:41:29,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:41:29,755 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:41:29,755 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:41:29,955 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 692 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3492 [2021-06-05 04:41:29,955 INFO L430 AbstractCegarLoop]: === Iteration 698 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:41:29,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:41:29,956 INFO L82 PathProgramCache]: Analyzing trace with hash -1575521750, now seen corresponding path program 692 times [2021-06-05 04:41:29,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:41:29,956 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548095864] [2021-06-05 04:41:29,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:41:29,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:41:30,133 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 04:41:30,133 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:41:30,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548095864] [2021-06-05 04:41:30,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548095864] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:30,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491543306] [2021-06-05 04:41:30,133 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 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 04:41:30,158 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:41:30,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:41:30,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 04:41:30,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:41:30,352 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:30,352 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 27 treesize of output 21 [2021-06-05 04:41:30,353 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:41:30,359 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:41:30,360 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:30,361 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 10 treesize of output 6 [2021-06-05 04:41:30,362 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:41:30,368 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:41:30,368 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:41:30,368 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:38, output treesize:13 [2021-06-05 04:41:30,387 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:41:30,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1491543306] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:30,388 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:41:30,388 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-06-05 04:41:30,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536094043] [2021-06-05 04:41:30,388 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 04:41:30,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:41:30,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 04:41:30,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:41:30,388 INFO L87 Difference]: Start difference. First operand 227 states and 498 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:41:30,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:41:30,713 INFO L93 Difference]: Finished difference Result 254 states and 544 transitions. [2021-06-05 04:41:30,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:41:30,713 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:41:30,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:41:30,713 INFO L225 Difference]: With dead ends: 254 [2021-06-05 04:41:30,713 INFO L226 Difference]: Without dead ends: 247 [2021-06-05 04:41:30,713 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 515.1ms TimeCoverageRelationStatistics Valid=94, Invalid=718, Unknown=0, NotChecked=0, Total=812 [2021-06-05 04:41:30,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2021-06-05 04:41:30,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 228. [2021-06-05 04:41:30,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 227 states have (on average 2.20704845814978) internal successors, (501), 227 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:41:30,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 501 transitions. [2021-06-05 04:41:30,715 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 501 transitions. Word has length 20 [2021-06-05 04:41:30,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:41:30,715 INFO L482 AbstractCegarLoop]: Abstraction has 228 states and 501 transitions. [2021-06-05 04:41:30,715 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:41:30,715 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 501 transitions. [2021-06-05 04:41:30,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:41:30,716 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:41:30,716 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:41:30,916 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 693 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3493 [2021-06-05 04:41:30,916 INFO L430 AbstractCegarLoop]: === Iteration 699 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:41:30,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:41:30,916 INFO L82 PathProgramCache]: Analyzing trace with hash -439336478, now seen corresponding path program 693 times [2021-06-05 04:41:30,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:41:30,916 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345922968] [2021-06-05 04:41:30,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:41:30,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:41:31,130 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:41:31,130 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:41:31,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345922968] [2021-06-05 04:41:31,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345922968] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:31,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091817688] [2021-06-05 04:41:31,130 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 694 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 694 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:41:31,155 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:41:31,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:41:31,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 04:41:31,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:41:31,326 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:31,327 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:31,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:41:31,328 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:41:31,330 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:31,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:41:31,331 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:41:31,351 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:41:31,354 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:31,354 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:31,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 04:41:31,355 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:41:31,357 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:31,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:41:31,359 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:41:31,379 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:41:31,380 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 04:41:31,380 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:35 [2021-06-05 04:41:31,456 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 04:41:31,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1091817688] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:31,456 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:41:31,456 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 04:41:31,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75446628] [2021-06-05 04:41:31,456 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 04:41:31,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:41:31,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 04:41:31,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:41:31,456 INFO L87 Difference]: Start difference. First operand 228 states and 501 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:41:31,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:41:31,999 INFO L93 Difference]: Finished difference Result 281 states and 590 transitions. [2021-06-05 04:41:31,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:41:31,999 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:41:31,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:41:32,000 INFO L225 Difference]: With dead ends: 281 [2021-06-05 04:41:32,000 INFO L226 Difference]: Without dead ends: 265 [2021-06-05 04:41:32,000 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 698.8ms TimeCoverageRelationStatistics Valid=117, Invalid=939, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 04:41:32,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2021-06-05 04:41:32,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 225. [2021-06-05 04:41:32,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 2.200892857142857) internal successors, (493), 224 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:41:32,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 493 transitions. [2021-06-05 04:41:32,002 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 493 transitions. Word has length 20 [2021-06-05 04:41:32,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:41:32,002 INFO L482 AbstractCegarLoop]: Abstraction has 225 states and 493 transitions. [2021-06-05 04:41:32,002 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:41:32,002 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 493 transitions. [2021-06-05 04:41:32,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:41:32,002 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:41:32,002 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:41:32,202 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3494,694 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:41:32,202 INFO L430 AbstractCegarLoop]: === Iteration 700 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:41:32,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:41:32,203 INFO L82 PathProgramCache]: Analyzing trace with hash 971642202, now seen corresponding path program 694 times [2021-06-05 04:41:32,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:41:32,203 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042486354] [2021-06-05 04:41:32,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:41:32,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:41:32,389 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:41:32,389 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:41:32,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042486354] [2021-06-05 04:41:32,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042486354] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:32,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811150668] [2021-06-05 04:41:32,389 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 695 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 695 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:41:32,414 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:41:32,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:41:32,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:41:32,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:41:32,580 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:32,581 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:32,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 04:41:32,582 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:41:32,584 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:32,584 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 27 treesize of output 21 [2021-06-05 04:41:32,585 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:41:32,606 INFO L628 ElimStorePlain]: treesize reduction 36, result has 42.9 percent of original size [2021-06-05 04:41:32,608 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:32,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:41:32,609 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:41:32,616 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:41:32,616 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 04:41:32,616 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-06-05 04:41:32,657 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 04:41:32,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1811150668] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:32,657 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:41:32,658 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 04:41:32,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613326963] [2021-06-05 04:41:32,658 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 04:41:32,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:41:32,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 04:41:32,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:41:32,658 INFO L87 Difference]: Start difference. First operand 225 states and 493 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:41:32,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:41:32,877 INFO L93 Difference]: Finished difference Result 246 states and 526 transitions. [2021-06-05 04:41:32,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:41:32,877 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:41:32,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:41:32,878 INFO L225 Difference]: With dead ends: 246 [2021-06-05 04:41:32,878 INFO L226 Difference]: Without dead ends: 230 [2021-06-05 04:41:32,878 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 431.5ms TimeCoverageRelationStatistics Valid=89, Invalid=667, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:41:32,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2021-06-05 04:41:32,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 227. [2021-06-05 04:41:32,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 226 states have (on average 2.1991150442477876) internal successors, (497), 226 states have internal predecessors, (497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:41:32,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 497 transitions. [2021-06-05 04:41:32,880 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 497 transitions. Word has length 20 [2021-06-05 04:41:32,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:41:32,880 INFO L482 AbstractCegarLoop]: Abstraction has 227 states and 497 transitions. [2021-06-05 04:41:32,880 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:41:32,880 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 497 transitions. [2021-06-05 04:41:32,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:41:32,880 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:41:32,880 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:41:33,080 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3497,695 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:41:33,081 INFO L430 AbstractCegarLoop]: === Iteration 701 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:41:33,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:41:33,081 INFO L82 PathProgramCache]: Analyzing trace with hash 1833647266, now seen corresponding path program 695 times [2021-06-05 04:41:33,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:41:33,081 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005852734] [2021-06-05 04:41:33,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:41:33,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:41:33,276 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:41:33,276 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:41:33,276 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005852734] [2021-06-05 04:41:33,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005852734] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:33,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915863072] [2021-06-05 04:41:33,277 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 696 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 696 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:41:33,302 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:41:33,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:41:33,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:41:33,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:41:33,484 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:33,484 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:33,484 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 27 treesize of output 21 [2021-06-05 04:41:33,485 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:41:33,487 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:33,487 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 27 treesize of output 21 [2021-06-05 04:41:33,488 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:41:33,509 INFO L628 ElimStorePlain]: treesize reduction 42, result has 39.1 percent of original size [2021-06-05 04:41:33,511 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:33,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:41:33,512 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:41:33,519 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:41:33,520 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 04:41:33,520 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-06-05 04:41:33,561 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 04:41:33,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1915863072] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:33,561 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:41:33,561 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 04:41:33,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580573230] [2021-06-05 04:41:33,561 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 04:41:33,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:41:33,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 04:41:33,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=485, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:41:33,562 INFO L87 Difference]: Start difference. First operand 227 states and 497 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:41:34,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:41:34,025 INFO L93 Difference]: Finished difference Result 247 states and 532 transitions. [2021-06-05 04:41:34,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:41:34,025 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:41:34,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:41:34,026 INFO L225 Difference]: With dead ends: 247 [2021-06-05 04:41:34,026 INFO L226 Difference]: Without dead ends: 234 [2021-06-05 04:41:34,026 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 561.3ms TimeCoverageRelationStatistics Valid=109, Invalid=821, Unknown=0, NotChecked=0, Total=930 [2021-06-05 04:41:34,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-06-05 04:41:34,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 228. [2021-06-05 04:41:34,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 227 states have (on average 2.198237885462555) internal successors, (499), 227 states have internal predecessors, (499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:41:34,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 499 transitions. [2021-06-05 04:41:34,028 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 499 transitions. Word has length 20 [2021-06-05 04:41:34,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:41:34,028 INFO L482 AbstractCegarLoop]: Abstraction has 228 states and 499 transitions. [2021-06-05 04:41:34,028 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:41:34,028 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 499 transitions. [2021-06-05 04:41:34,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:41:34,028 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:41:34,028 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:41:34,228 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3498,696 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:41:34,229 INFO L430 AbstractCegarLoop]: === Iteration 702 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:41:34,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:41:34,229 INFO L82 PathProgramCache]: Analyzing trace with hash -1325134758, now seen corresponding path program 696 times [2021-06-05 04:41:34,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:41:34,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986986175] [2021-06-05 04:41:34,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:41:34,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:41:34,379 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 04:41:34,379 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:41:34,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986986175] [2021-06-05 04:41:34,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986986175] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:34,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954626436] [2021-06-05 04:41:34,380 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 697 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 697 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:41:34,406 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:41:34,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:41:34,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 04:41:34,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:41:34,557 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:34,557 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:34,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:41:34,558 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:41:34,560 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:34,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:41:34,561 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:41:34,584 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:41:34,586 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:34,586 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:34,587 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 13 treesize of output 9 [2021-06-05 04:41:34,588 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:41:34,590 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:34,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 04:41:34,591 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:41:34,613 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:41:34,614 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 04:41:34,614 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:35 [2021-06-05 04:41:34,688 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:41:34,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [954626436] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:34,688 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:41:34,689 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 04:41:34,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486507708] [2021-06-05 04:41:34,689 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 04:41:34,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:41:34,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 04:41:34,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=485, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:41:34,689 INFO L87 Difference]: Start difference. First operand 228 states and 499 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:41:35,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:41:35,169 INFO L93 Difference]: Finished difference Result 267 states and 564 transitions. [2021-06-05 04:41:35,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:41:35,169 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:41:35,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:41:35,170 INFO L225 Difference]: With dead ends: 267 [2021-06-05 04:41:35,170 INFO L226 Difference]: Without dead ends: 251 [2021-06-05 04:41:35,170 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 531.7ms TimeCoverageRelationStatistics Valid=117, Invalid=875, Unknown=0, NotChecked=0, Total=992 [2021-06-05 04:41:35,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2021-06-05 04:41:35,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 226. [2021-06-05 04:41:35,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 225 states have (on average 2.2) internal successors, (495), 225 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:41:35,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 495 transitions. [2021-06-05 04:41:35,171 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 495 transitions. Word has length 20 [2021-06-05 04:41:35,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:41:35,172 INFO L482 AbstractCegarLoop]: Abstraction has 226 states and 495 transitions. [2021-06-05 04:41:35,172 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:41:35,172 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 495 transitions. [2021-06-05 04:41:35,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:41:35,172 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:41:35,172 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:41:35,372 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3499,697 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:41:35,372 INFO L430 AbstractCegarLoop]: === Iteration 703 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:41:35,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:41:35,373 INFO L82 PathProgramCache]: Analyzing trace with hash -273136854, now seen corresponding path program 697 times [2021-06-05 04:41:35,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:41:35,373 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104692699] [2021-06-05 04:41:35,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:41:35,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:41:35,539 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 04:41:35,539 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:41:35,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104692699] [2021-06-05 04:41:35,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104692699] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:35,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074340091] [2021-06-05 04:41:35,539 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 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 04:41:35,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:41:35,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:41:35,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:41:35,720 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:35,720 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:35,721 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 27 treesize of output 21 [2021-06-05 04:41:35,721 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:41:35,723 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:35,724 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 27 treesize of output 21 [2021-06-05 04:41:35,724 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:41:35,746 INFO L628 ElimStorePlain]: treesize reduction 42, result has 39.1 percent of original size [2021-06-05 04:41:35,748 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:35,748 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 10 treesize of output 6 [2021-06-05 04:41:35,749 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:41:35,756 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:41:35,757 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 04:41:35,757 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-06-05 04:41:35,795 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 04:41:35,796 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1074340091] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:35,796 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:41:35,796 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 04:41:35,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371770272] [2021-06-05 04:41:35,796 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 04:41:35,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:41:35,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 04:41:35,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:41:35,796 INFO L87 Difference]: Start difference. First operand 226 states and 495 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:41:36,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:41:36,103 INFO L93 Difference]: Finished difference Result 251 states and 540 transitions. [2021-06-05 04:41:36,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:41:36,104 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:41:36,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:41:36,104 INFO L225 Difference]: With dead ends: 251 [2021-06-05 04:41:36,104 INFO L226 Difference]: Without dead ends: 238 [2021-06-05 04:41:36,104 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 422.1ms TimeCoverageRelationStatistics Valid=99, Invalid=713, Unknown=0, NotChecked=0, Total=812 [2021-06-05 04:41:36,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2021-06-05 04:41:36,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 228. [2021-06-05 04:41:36,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 227 states have (on average 2.198237885462555) internal successors, (499), 227 states have internal predecessors, (499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:41:36,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 499 transitions. [2021-06-05 04:41:36,106 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 499 transitions. Word has length 20 [2021-06-05 04:41:36,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:41:36,106 INFO L482 AbstractCegarLoop]: Abstraction has 228 states and 499 transitions. [2021-06-05 04:41:36,106 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:41:36,106 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 499 transitions. [2021-06-05 04:41:36,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:41:36,106 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:41:36,106 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:41:36,306 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3502,698 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:41:36,307 INFO L430 AbstractCegarLoop]: === Iteration 704 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:41:36,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:41:36,307 INFO L82 PathProgramCache]: Analyzing trace with hash 863048418, now seen corresponding path program 698 times [2021-06-05 04:41:36,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:41:36,307 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096336581] [2021-06-05 04:41:36,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:41:36,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:41:36,528 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 04:41:36,528 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:41:36,528 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096336581] [2021-06-05 04:41:36,528 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096336581] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:36,528 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877235512] [2021-06-05 04:41:36,528 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 699 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 699 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:41:36,554 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:41:36,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:41:36,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 04:41:36,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:41:36,691 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:36,692 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:36,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:41:36,693 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:41:36,706 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:36,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:41:36,707 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:41:36,729 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:41:36,732 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:36,732 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:36,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:41:36,734 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:41:36,736 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:36,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:41:36,737 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:41:36,757 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:41:36,758 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 04:41:36,758 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:35 [2021-06-05 04:41:36,835 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 04:41:36,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1877235512] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:36,835 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:41:36,835 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 04:41:36,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541789663] [2021-06-05 04:41:36,835 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 04:41:36,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:41:36,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 04:41:36,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:41:36,835 INFO L87 Difference]: Start difference. First operand 228 states and 499 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:41:37,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:41:37,250 INFO L93 Difference]: Finished difference Result 270 states and 570 transitions. [2021-06-05 04:41:37,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:41:37,251 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:41:37,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:41:37,251 INFO L225 Difference]: With dead ends: 270 [2021-06-05 04:41:37,251 INFO L226 Difference]: Without dead ends: 254 [2021-06-05 04:41:37,251 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 633.7ms TimeCoverageRelationStatistics Valid=112, Invalid=818, Unknown=0, NotChecked=0, Total=930 [2021-06-05 04:41:37,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-06-05 04:41:37,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 227. [2021-06-05 04:41:37,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 226 states have (on average 2.1991150442477876) internal successors, (497), 226 states have internal predecessors, (497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:41:37,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 497 transitions. [2021-06-05 04:41:37,253 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 497 transitions. Word has length 20 [2021-06-05 04:41:37,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:41:37,253 INFO L482 AbstractCegarLoop]: Abstraction has 227 states and 497 transitions. [2021-06-05 04:41:37,253 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:41:37,253 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 497 transitions. [2021-06-05 04:41:37,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:41:37,253 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:41:37,253 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:41:37,454 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 699 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3503 [2021-06-05 04:41:37,454 INFO L430 AbstractCegarLoop]: === Iteration 705 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:41:37,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:41:37,454 INFO L82 PathProgramCache]: Analyzing trace with hash -1283122342, now seen corresponding path program 699 times [2021-06-05 04:41:37,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:41:37,454 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315932034] [2021-06-05 04:41:37,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:41:37,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:41:37,660 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 04:41:37,660 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:41:37,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315932034] [2021-06-05 04:41:37,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315932034] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:37,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925750474] [2021-06-05 04:41:37,660 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 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 04:41:37,687 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 04:41:37,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:41:37,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 04:41:37,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:41:37,844 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:37,845 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:37,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:41:37,845 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:41:37,848 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:37,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:41:37,849 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:41:37,902 INFO L628 ElimStorePlain]: treesize reduction 78, result has 45.5 percent of original size [2021-06-05 04:41:37,905 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:37,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 04:41:37,906 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:41:37,927 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:41:37,929 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:37,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:41:37,930 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:41:37,949 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:41:37,951 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:37,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:41:37,952 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:41:37,970 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:41:37,971 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 04:41:37,972 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:153, output treesize:32 [2021-06-05 04:41:38,049 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:41:38,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [925750474] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:38,049 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:41:38,049 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 04:41:38,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088413034] [2021-06-05 04:41:38,049 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 04:41:38,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:41:38,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 04:41:38,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=528, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:41:38,050 INFO L87 Difference]: Start difference. First operand 227 states and 497 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:41:38,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:41:38,602 INFO L93 Difference]: Finished difference Result 281 states and 594 transitions. [2021-06-05 04:41:38,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 04:41:38,603 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:41:38,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:41:38,603 INFO L225 Difference]: With dead ends: 281 [2021-06-05 04:41:38,603 INFO L226 Difference]: Without dead ends: 262 [2021-06-05 04:41:38,603 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 620.9ms TimeCoverageRelationStatistics Valid=110, Invalid=820, Unknown=0, NotChecked=0, Total=930 [2021-06-05 04:41:38,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-06-05 04:41:38,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 227. [2021-06-05 04:41:38,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 226 states have (on average 2.1991150442477876) internal successors, (497), 226 states have internal predecessors, (497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:41:38,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 497 transitions. [2021-06-05 04:41:38,605 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 497 transitions. Word has length 20 [2021-06-05 04:41:38,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:41:38,605 INFO L482 AbstractCegarLoop]: Abstraction has 227 states and 497 transitions. [2021-06-05 04:41:38,605 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:41:38,605 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 497 transitions. [2021-06-05 04:41:38,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:41:38,605 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:41:38,605 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:41:38,806 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 700 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3506 [2021-06-05 04:41:38,806 INFO L430 AbstractCegarLoop]: === Iteration 706 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:41:38,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:41:38,806 INFO L82 PathProgramCache]: Analyzing trace with hash -718300702, now seen corresponding path program 700 times [2021-06-05 04:41:38,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:41:38,806 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171892475] [2021-06-05 04:41:38,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:41:38,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:41:38,945 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:41:38,945 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:41:38,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171892475] [2021-06-05 04:41:38,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171892475] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:38,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658047354] [2021-06-05 04:41:38,945 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 701 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 701 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:41:38,970 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:41:38,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:41:38,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:41:38,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:41:39,138 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:39,139 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:39,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 04:41:39,140 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:41:39,142 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:39,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 04:41:39,143 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:41:39,165 INFO L628 ElimStorePlain]: treesize reduction 36, result has 42.9 percent of original size [2021-06-05 04:41:39,167 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:39,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:41:39,168 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:41:39,175 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:41:39,175 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:41:39,176 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-06-05 04:41:39,212 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:41:39,212 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [658047354] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:39,212 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:41:39,212 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 04:41:39,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157022570] [2021-06-05 04:41:39,212 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 04:41:39,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:41:39,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 04:41:39,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=483, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:41:39,212 INFO L87 Difference]: Start difference. First operand 227 states and 497 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:41:39,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:41:39,638 INFO L93 Difference]: Finished difference Result 257 states and 552 transitions. [2021-06-05 04:41:39,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:41:39,638 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:41:39,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:41:39,639 INFO L225 Difference]: With dead ends: 257 [2021-06-05 04:41:39,639 INFO L226 Difference]: Without dead ends: 241 [2021-06-05 04:41:39,639 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 493.6ms TimeCoverageRelationStatistics Valid=123, Invalid=933, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 04:41:39,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2021-06-05 04:41:39,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 229. [2021-06-05 04:41:39,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 2.1973684210526314) internal successors, (501), 228 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:41:39,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 501 transitions. [2021-06-05 04:41:39,641 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 501 transitions. Word has length 20 [2021-06-05 04:41:39,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:41:39,641 INFO L482 AbstractCegarLoop]: Abstraction has 229 states and 501 transitions. [2021-06-05 04:41:39,641 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:41:39,641 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 501 transitions. [2021-06-05 04:41:39,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:41:39,641 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:41:39,641 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:41:39,841 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3511,701 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:41:39,841 INFO L430 AbstractCegarLoop]: === Iteration 707 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:41:39,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:41:39,842 INFO L82 PathProgramCache]: Analyzing trace with hash 143704362, now seen corresponding path program 701 times [2021-06-05 04:41:39,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:41:39,842 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630503281] [2021-06-05 04:41:39,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:41:39,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:41:40,010 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 04:41:40,010 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:41:40,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630503281] [2021-06-05 04:41:40,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630503281] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:40,011 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896643470] [2021-06-05 04:41:40,011 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 702 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 702 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:41:40,036 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:41:40,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:41:40,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:41:40,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:41:40,210 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:40,211 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:40,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 04:41:40,212 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:41:40,214 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:40,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 04:41:40,215 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:41:40,237 INFO L628 ElimStorePlain]: treesize reduction 36, result has 42.9 percent of original size [2021-06-05 04:41:40,239 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:40,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:41:40,241 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:41:40,247 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:41:40,248 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 04:41:40,248 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-06-05 04:41:40,283 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:41:40,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1896643470] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:40,284 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:41:40,284 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 04:41:40,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623405084] [2021-06-05 04:41:40,284 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 04:41:40,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:41:40,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 04:41:40,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:41:40,284 INFO L87 Difference]: Start difference. First operand 229 states and 501 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:41:40,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:41:40,596 INFO L93 Difference]: Finished difference Result 249 states and 533 transitions. [2021-06-05 04:41:40,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:41:40,596 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:41:40,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:41:40,597 INFO L225 Difference]: With dead ends: 249 [2021-06-05 04:41:40,597 INFO L226 Difference]: Without dead ends: 236 [2021-06-05 04:41:40,597 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 500.0ms TimeCoverageRelationStatistics Valid=106, Invalid=764, Unknown=0, NotChecked=0, Total=870 [2021-06-05 04:41:40,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-06-05 04:41:40,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 230. [2021-06-05 04:41:40,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 229 states have (on average 2.1965065502183405) internal successors, (503), 229 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:41:40,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 503 transitions. [2021-06-05 04:41:40,599 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 503 transitions. Word has length 20 [2021-06-05 04:41:40,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:41:40,599 INFO L482 AbstractCegarLoop]: Abstraction has 230 states and 503 transitions. [2021-06-05 04:41:40,599 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:41:40,599 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 503 transitions. [2021-06-05 04:41:40,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:41:40,599 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:41:40,599 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:41:40,799 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3512,702 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:41:40,799 INFO L430 AbstractCegarLoop]: === Iteration 708 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:41:40,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:41:40,800 INFO L82 PathProgramCache]: Analyzing trace with hash 1279889634, now seen corresponding path program 702 times [2021-06-05 04:41:40,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:41:40,800 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208840933] [2021-06-05 04:41:40,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:41:40,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:41:41,021 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 04:41:41,021 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:41:41,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208840933] [2021-06-05 04:41:41,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208840933] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:41,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349310635] [2021-06-05 04:41:41,021 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 703 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 703 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:41:41,048 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:41:41,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:41:41,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:41:41,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:41:41,201 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:41,201 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:41,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:41:41,202 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:41:41,205 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:41,205 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:41,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:41:41,206 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:41:41,208 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:41,209 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:41,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:41:41,210 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:41:41,212 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:41,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:41:41,213 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:41:41,267 INFO L628 ElimStorePlain]: treesize reduction 80, result has 44.4 percent of original size [2021-06-05 04:41:41,270 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:41,270 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:41,270 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 10 treesize of output 6 [2021-06-05 04:41:41,271 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:41:41,274 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:41,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:41:41,275 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:41:41,298 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:41:41,299 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 04:41:41,299 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:173, output treesize:38 [2021-06-05 04:41:41,381 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 04:41:41,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [349310635] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:41,382 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:41:41,382 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 04:41:41,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529435073] [2021-06-05 04:41:41,382 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 04:41:41,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:41:41,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 04:41:41,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=528, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:41:41,382 INFO L87 Difference]: Start difference. First operand 230 states and 503 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:41:41,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:41:41,944 INFO L93 Difference]: Finished difference Result 273 states and 573 transitions. [2021-06-05 04:41:41,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 04:41:41,945 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:41:41,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:41:41,945 INFO L225 Difference]: With dead ends: 273 [2021-06-05 04:41:41,945 INFO L226 Difference]: Without dead ends: 254 [2021-06-05 04:41:41,945 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 773.6ms TimeCoverageRelationStatistics Valid=135, Invalid=1055, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 04:41:41,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-06-05 04:41:41,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 228. [2021-06-05 04:41:41,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 227 states have (on average 2.198237885462555) internal successors, (499), 227 states have internal predecessors, (499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:41:41,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 499 transitions. [2021-06-05 04:41:41,947 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 499 transitions. Word has length 20 [2021-06-05 04:41:41,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:41:41,947 INFO L482 AbstractCegarLoop]: Abstraction has 228 states and 499 transitions. [2021-06-05 04:41:41,947 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:41:41,947 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 499 transitions. [2021-06-05 04:41:41,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:41:41,947 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:41:41,947 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:41:42,147 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 703 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3513 [2021-06-05 04:41:42,148 INFO L430 AbstractCegarLoop]: === Iteration 709 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:41:42,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:41:42,148 INFO L82 PathProgramCache]: Analyzing trace with hash -1963079758, now seen corresponding path program 703 times [2021-06-05 04:41:42,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:41:42,148 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823342699] [2021-06-05 04:41:42,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:41:42,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:41:42,334 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 04:41:42,335 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:41:42,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823342699] [2021-06-05 04:41:42,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823342699] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:42,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898314192] [2021-06-05 04:41:42,335 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 704 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 704 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:41:42,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:41:42,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:41:42,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:41:42,520 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:42,520 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:42,521 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 27 treesize of output 21 [2021-06-05 04:41:42,521 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:41:42,523 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:42,524 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 27 treesize of output 21 [2021-06-05 04:41:42,524 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:41:42,546 INFO L628 ElimStorePlain]: treesize reduction 36, result has 47.8 percent of original size [2021-06-05 04:41:42,548 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:42,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 04:41:42,548 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:41:42,555 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:41:42,556 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 04:41:42,556 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-06-05 04:41:42,595 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 04:41:42,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1898314192] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:42,595 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:41:42,595 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 04:41:42,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66527106] [2021-06-05 04:41:42,596 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 04:41:42,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:41:42,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 04:41:42,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:41:42,596 INFO L87 Difference]: Start difference. First operand 228 states and 499 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:41:42,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:41:42,922 INFO L93 Difference]: Finished difference Result 252 states and 542 transitions. [2021-06-05 04:41:42,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:41:42,922 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:41:42,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:41:42,923 INFO L225 Difference]: With dead ends: 252 [2021-06-05 04:41:42,923 INFO L226 Difference]: Without dead ends: 239 [2021-06-05 04:41:42,923 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 493.3ms TimeCoverageRelationStatistics Valid=105, Invalid=765, Unknown=0, NotChecked=0, Total=870 [2021-06-05 04:41:42,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2021-06-05 04:41:42,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 230. [2021-06-05 04:41:42,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 229 states have (on average 2.1965065502183405) internal successors, (503), 229 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:41:42,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 503 transitions. [2021-06-05 04:41:42,925 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 503 transitions. Word has length 20 [2021-06-05 04:41:42,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:41:42,925 INFO L482 AbstractCegarLoop]: Abstraction has 230 states and 503 transitions. [2021-06-05 04:41:42,925 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:41:42,925 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 503 transitions. [2021-06-05 04:41:42,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:41:42,925 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:41:42,925 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:41:43,125 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3516,704 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:41:43,126 INFO L430 AbstractCegarLoop]: === Iteration 710 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:41:43,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:41:43,126 INFO L82 PathProgramCache]: Analyzing trace with hash -826894486, now seen corresponding path program 704 times [2021-06-05 04:41:43,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:41:43,126 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653467627] [2021-06-05 04:41:43,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:41:43,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:41:43,349 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 04:41:43,350 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:41:43,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653467627] [2021-06-05 04:41:43,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653467627] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:43,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141068249] [2021-06-05 04:41:43,350 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 705 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 705 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:41:43,375 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:41:43,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:41:43,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 04:41:43,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:41:43,508 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:43,508 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:43,508 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 19 treesize of output 15 [2021-06-05 04:41:43,509 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:41:43,511 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:43,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:41:43,512 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:41:43,534 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:41:43,537 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:43,537 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:43,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 04:41:43,538 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:41:43,540 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:43,541 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 13 treesize of output 9 [2021-06-05 04:41:43,542 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:41:43,562 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:41:43,563 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 04:41:43,563 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:35 [2021-06-05 04:41:43,637 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 04:41:43,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [141068249] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:43,637 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:41:43,637 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 04:41:43,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324110073] [2021-06-05 04:41:43,637 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 04:41:43,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:41:43,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 04:41:43,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:41:43,637 INFO L87 Difference]: Start difference. First operand 230 states and 503 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:41:44,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:41:44,011 INFO L93 Difference]: Finished difference Result 250 states and 541 transitions. [2021-06-05 04:41:44,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:41:44,011 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:41:44,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:41:44,011 INFO L225 Difference]: With dead ends: 250 [2021-06-05 04:41:44,011 INFO L226 Difference]: Without dead ends: 243 [2021-06-05 04:41:44,011 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 584.9ms TimeCoverageRelationStatistics Valid=119, Invalid=873, Unknown=0, NotChecked=0, Total=992 [2021-06-05 04:41:44,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2021-06-05 04:41:44,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 229. [2021-06-05 04:41:44,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 2.1973684210526314) internal successors, (501), 228 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:41:44,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 501 transitions. [2021-06-05 04:41:44,013 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 501 transitions. Word has length 20 [2021-06-05 04:41:44,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:41:44,013 INFO L482 AbstractCegarLoop]: Abstraction has 229 states and 501 transitions. [2021-06-05 04:41:44,013 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:41:44,013 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 501 transitions. [2021-06-05 04:41:44,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:41:44,014 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:41:44,014 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:41:44,214 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 705 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3517 [2021-06-05 04:41:44,214 INFO L430 AbstractCegarLoop]: === Iteration 711 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:41:44,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:41:44,214 INFO L82 PathProgramCache]: Analyzing trace with hash 1321902050, now seen corresponding path program 705 times [2021-06-05 04:41:44,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:41:44,214 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700958457] [2021-06-05 04:41:44,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:41:44,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:41:44,421 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:41:44,421 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:41:44,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700958457] [2021-06-05 04:41:44,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700958457] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:44,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147150211] [2021-06-05 04:41:44,422 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 706 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 706 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:41:44,448 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 04:41:44,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:41:44,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:41:44,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:41:44,610 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:44,610 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:44,611 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 19 treesize of output 15 [2021-06-05 04:41:44,611 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:41:44,614 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:44,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:41:44,615 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:41:44,676 INFO L628 ElimStorePlain]: treesize reduction 88, result has 46.0 percent of original size [2021-06-05 04:41:44,679 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:44,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 04:41:44,680 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:41:44,704 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:41:44,706 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:44,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:41:44,707 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:41:44,729 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:41:44,731 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:44,731 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 10 treesize of output 6 [2021-06-05 04:41:44,732 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:41:44,753 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:41:44,754 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 04:41:44,754 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-06-05 04:41:44,835 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 04:41:44,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1147150211] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:44,835 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:41:44,835 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 04:41:44,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63547180] [2021-06-05 04:41:44,835 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 04:41:44,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:41:44,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 04:41:44,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:41:44,836 INFO L87 Difference]: Start difference. First operand 229 states and 501 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:41:45,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:41:45,238 INFO L93 Difference]: Finished difference Result 287 states and 606 transitions. [2021-06-05 04:41:45,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 04:41:45,238 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:41:45,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:41:45,239 INFO L225 Difference]: With dead ends: 287 [2021-06-05 04:41:45,239 INFO L226 Difference]: Without dead ends: 268 [2021-06-05 04:41:45,239 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 549.5ms TimeCoverageRelationStatistics Valid=104, Invalid=708, Unknown=0, NotChecked=0, Total=812 [2021-06-05 04:41:45,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2021-06-05 04:41:45,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 229. [2021-06-05 04:41:45,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 2.1973684210526314) internal successors, (501), 228 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:41:45,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 501 transitions. [2021-06-05 04:41:45,241 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 501 transitions. Word has length 20 [2021-06-05 04:41:45,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:41:45,241 INFO L482 AbstractCegarLoop]: Abstraction has 229 states and 501 transitions. [2021-06-05 04:41:45,241 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:41:45,241 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 501 transitions. [2021-06-05 04:41:45,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:41:45,241 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:41:45,241 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:41:45,441 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3520,706 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:41:45,442 INFO L430 AbstractCegarLoop]: === Iteration 712 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:41:45,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:41:45,442 INFO L82 PathProgramCache]: Analyzing trace with hash 1446089258, now seen corresponding path program 706 times [2021-06-05 04:41:45,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:41:45,442 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763106496] [2021-06-05 04:41:45,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:41:45,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:41:45,631 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 04:41:45,631 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:41:45,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763106496] [2021-06-05 04:41:45,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763106496] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:45,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258636351] [2021-06-05 04:41:45,631 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 707 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 707 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:41:45,656 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:41:45,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:41:45,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:41:45,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:41:45,846 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:45,847 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:45,847 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 27 treesize of output 21 [2021-06-05 04:41:45,848 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:41:45,851 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:45,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 04:41:45,852 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:41:45,879 INFO L628 ElimStorePlain]: treesize reduction 42, result has 39.1 percent of original size [2021-06-05 04:41:45,881 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:45,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:41:45,883 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:41:45,890 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:41:45,890 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 04:41:45,890 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-06-05 04:41:45,930 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 04:41:45,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [258636351] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:45,931 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:41:45,931 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 04:41:45,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006353502] [2021-06-05 04:41:45,931 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 04:41:45,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:41:45,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 04:41:45,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:41:45,931 INFO L87 Difference]: Start difference. First operand 229 states and 501 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:41:46,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:41:46,234 INFO L93 Difference]: Finished difference Result 257 states and 552 transitions. [2021-06-05 04:41:46,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:41:46,234 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:41:46,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:41:46,234 INFO L225 Difference]: With dead ends: 257 [2021-06-05 04:41:46,234 INFO L226 Difference]: Without dead ends: 244 [2021-06-05 04:41:46,235 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 430.1ms TimeCoverageRelationStatistics Valid=89, Invalid=667, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:41:46,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2021-06-05 04:41:46,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 232. [2021-06-05 04:41:46,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 231 states have (on average 2.1948051948051948) internal successors, (507), 231 states have internal predecessors, (507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:41:46,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 507 transitions. [2021-06-05 04:41:46,236 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 507 transitions. Word has length 20 [2021-06-05 04:41:46,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:41:46,236 INFO L482 AbstractCegarLoop]: Abstraction has 232 states and 507 transitions. [2021-06-05 04:41:46,236 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:41:46,237 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 507 transitions. [2021-06-05 04:41:46,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:41:46,237 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:41:46,237 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:41:46,437 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 707 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3525 [2021-06-05 04:41:46,437 INFO L430 AbstractCegarLoop]: === Iteration 713 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:41:46,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:41:46,437 INFO L82 PathProgramCache]: Analyzing trace with hash -1712692766, now seen corresponding path program 707 times [2021-06-05 04:41:46,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:41:46,438 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772270177] [2021-06-05 04:41:46,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:41:46,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:41:46,666 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:41:46,666 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:41:46,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772270177] [2021-06-05 04:41:46,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772270177] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:46,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875278924] [2021-06-05 04:41:46,666 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 708 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 708 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:41:46,692 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:41:46,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:41:46,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:41:46,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:41:46,837 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:46,837 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:46,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:41:46,838 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:41:46,841 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:46,841 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:46,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:41:46,842 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:41:46,844 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:46,845 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:46,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:41:46,846 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:41:46,848 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:46,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:41:46,849 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:41:46,904 INFO L628 ElimStorePlain]: treesize reduction 80, result has 45.6 percent of original size [2021-06-05 04:41:46,906 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:46,907 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:46,907 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 13 treesize of output 9 [2021-06-05 04:41:46,908 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:41:46,911 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:46,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:41:46,912 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:41:46,935 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:41:46,936 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 04:41:46,936 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:173, output treesize:38 [2021-06-05 04:41:47,020 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:41:47,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1875278924] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:47,020 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:41:47,020 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 04:41:47,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576358646] [2021-06-05 04:41:47,020 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 04:41:47,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:41:47,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 04:41:47,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=528, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:41:47,021 INFO L87 Difference]: Start difference. First operand 232 states and 507 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:41:47,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:41:47,543 INFO L93 Difference]: Finished difference Result 278 states and 583 transitions. [2021-06-05 04:41:47,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 04:41:47,543 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:41:47,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:41:47,544 INFO L225 Difference]: With dead ends: 278 [2021-06-05 04:41:47,544 INFO L226 Difference]: Without dead ends: 259 [2021-06-05 04:41:47,544 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 635.7ms TimeCoverageRelationStatistics Valid=105, Invalid=765, Unknown=0, NotChecked=0, Total=870 [2021-06-05 04:41:47,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2021-06-05 04:41:47,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 231. [2021-06-05 04:41:47,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 230 states have (on average 2.1956521739130435) internal successors, (505), 230 states have internal predecessors, (505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:41:47,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 505 transitions. [2021-06-05 04:41:47,546 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 505 transitions. Word has length 20 [2021-06-05 04:41:47,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:41:47,547 INFO L482 AbstractCegarLoop]: Abstraction has 231 states and 505 transitions. [2021-06-05 04:41:47,547 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:41:47,547 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 505 transitions. [2021-06-05 04:41:47,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:41:47,547 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:41:47,547 INFO L521 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:41:47,752 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3526,708 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:41:47,753 INFO L430 AbstractCegarLoop]: === Iteration 714 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:41:47,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:41:47,753 INFO L82 PathProgramCache]: Analyzing trace with hash 660035238, now seen corresponding path program 708 times [2021-06-05 04:41:47,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:41:47,753 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830240294] [2021-06-05 04:41:47,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:41:47,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:41:47,826 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:41:47,827 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:41:47,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830240294] [2021-06-05 04:41:47,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830240294] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:47,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610181802] [2021-06-05 04:41:47,827 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 709 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 709 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:41:47,853 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:41:47,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:41:47,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:41:47,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:41:48,002 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:41:48,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1610181802] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:48,002 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:41:48,002 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:41:48,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255468379] [2021-06-05 04:41:48,003 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:41:48,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:41:48,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:41:48,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:41:48,003 INFO L87 Difference]: Start difference. First operand 231 states and 505 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:41:48,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:41:48,136 INFO L93 Difference]: Finished difference Result 279 states and 601 transitions. [2021-06-05 04:41:48,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:41:48,137 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:41:48,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:41:48,137 INFO L225 Difference]: With dead ends: 279 [2021-06-05 04:41:48,137 INFO L226 Difference]: Without dead ends: 279 [2021-06-05 04:41:48,137 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 151.4ms TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:41:48,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2021-06-05 04:41:48,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 231. [2021-06-05 04:41:48,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 230 states have (on average 2.1956521739130435) internal successors, (505), 230 states have internal predecessors, (505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:41:48,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 505 transitions. [2021-06-05 04:41:48,139 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 505 transitions. Word has length 20 [2021-06-05 04:41:48,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:41:48,139 INFO L482 AbstractCegarLoop]: Abstraction has 231 states and 505 transitions. [2021-06-05 04:41:48,139 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 04:41:48,139 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 505 transitions. [2021-06-05 04:41:48,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:41:48,139 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:41:48,139 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:41:48,340 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3529,709 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:41:48,340 INFO L430 AbstractCegarLoop]: === Iteration 715 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:41:48,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:41:48,340 INFO L82 PathProgramCache]: Analyzing trace with hash 436103770, now seen corresponding path program 709 times [2021-06-05 04:41:48,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:41:48,340 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264945074] [2021-06-05 04:41:48,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:41:48,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:41:48,548 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 04:41:48,548 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:41:48,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264945074] [2021-06-05 04:41:48,548 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264945074] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:48,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351095318] [2021-06-05 04:41:48,548 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 710 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 710 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:41:48,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:41:48,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:41:48,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:41:48,737 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:48,737 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:48,738 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 19 treesize of output 15 [2021-06-05 04:41:48,738 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:41:48,741 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:48,741 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 19 treesize of output 15 [2021-06-05 04:41:48,742 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:41:48,804 INFO L628 ElimStorePlain]: treesize reduction 88, result has 46.0 percent of original size [2021-06-05 04:41:48,807 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:48,807 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 13 treesize of output 9 [2021-06-05 04:41:48,808 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:41:48,832 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:41:48,835 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:48,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:41:48,836 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:41:48,858 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:41:48,860 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:48,860 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 13 treesize of output 9 [2021-06-05 04:41:48,862 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:41:48,883 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:41:48,883 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 04:41:48,884 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-06-05 04:41:48,965 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 04:41:48,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [351095318] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:48,965 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:41:48,965 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 04:41:48,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559643122] [2021-06-05 04:41:48,965 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 04:41:48,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:41:48,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 04:41:48,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=528, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:41:48,966 INFO L87 Difference]: Start difference. First operand 231 states and 505 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:41:49,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:41:49,481 INFO L93 Difference]: Finished difference Result 287 states and 606 transitions. [2021-06-05 04:41:49,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 04:41:49,481 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:41:49,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:41:49,481 INFO L225 Difference]: With dead ends: 287 [2021-06-05 04:41:49,481 INFO L226 Difference]: Without dead ends: 268 [2021-06-05 04:41:49,481 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 692.0ms TimeCoverageRelationStatistics Valid=124, Invalid=932, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 04:41:49,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2021-06-05 04:41:49,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 230. [2021-06-05 04:41:49,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 229 states have (on average 2.1965065502183405) internal successors, (503), 229 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:41:49,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 503 transitions. [2021-06-05 04:41:49,483 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 503 transitions. Word has length 20 [2021-06-05 04:41:49,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:41:49,483 INFO L482 AbstractCegarLoop]: Abstraction has 230 states and 503 transitions. [2021-06-05 04:41:49,483 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:41:49,483 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 503 transitions. [2021-06-05 04:41:49,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:41:49,483 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:41:49,484 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:41:49,684 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3541,710 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:41:49,684 INFO L430 AbstractCegarLoop]: === Iteration 716 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:41:49,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:41:49,684 INFO L82 PathProgramCache]: Analyzing trace with hash -1670680350, now seen corresponding path program 710 times [2021-06-05 04:41:49,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:41:49,684 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539412631] [2021-06-05 04:41:49,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:41:49,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:41:49,911 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 04:41:49,911 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:41:49,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539412631] [2021-06-05 04:41:49,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539412631] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:49,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105741457] [2021-06-05 04:41:49,912 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 711 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 711 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:41:49,936 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:41:49,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:41:49,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 04:41:49,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:41:50,090 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:50,091 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:50,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:41:50,092 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:41:50,094 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:50,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:41:50,095 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:41:50,116 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:41:50,118 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:50,118 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:50,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 04:41:50,119 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:41:50,121 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:50,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:41:50,123 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:41:50,143 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:41:50,144 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 04:41:50,144 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:35 [2021-06-05 04:41:50,226 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:41:50,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2105741457] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:50,227 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:41:50,227 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 04:41:50,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150636715] [2021-06-05 04:41:50,227 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 04:41:50,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:41:50,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 04:41:50,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=535, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:41:50,227 INFO L87 Difference]: Start difference. First operand 230 states and 503 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:41:50,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:41:50,874 INFO L93 Difference]: Finished difference Result 269 states and 582 transitions. [2021-06-05 04:41:50,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 04:41:50,875 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:41:50,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:41:50,875 INFO L225 Difference]: With dead ends: 269 [2021-06-05 04:41:50,875 INFO L226 Difference]: Without dead ends: 260 [2021-06-05 04:41:50,875 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 678.7ms TimeCoverageRelationStatistics Valid=109, Invalid=947, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 04:41:50,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2021-06-05 04:41:50,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 230. [2021-06-05 04:41:50,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 229 states have (on average 2.1965065502183405) internal successors, (503), 229 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:41:50,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 503 transitions. [2021-06-05 04:41:50,877 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 503 transitions. Word has length 20 [2021-06-05 04:41:50,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:41:50,877 INFO L482 AbstractCegarLoop]: Abstraction has 230 states and 503 transitions. [2021-06-05 04:41:50,877 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:41:50,877 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 503 transitions. [2021-06-05 04:41:50,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:41:50,877 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:41:50,877 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:41:51,078 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3546,711 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:41:51,078 INFO L430 AbstractCegarLoop]: === Iteration 717 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:41:51,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:41:51,078 INFO L82 PathProgramCache]: Analyzing trace with hash 367594418, now seen corresponding path program 711 times [2021-06-05 04:41:51,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:41:51,078 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448965314] [2021-06-05 04:41:51,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:41:51,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:41:51,275 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:41:51,275 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:41:51,275 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448965314] [2021-06-05 04:41:51,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448965314] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:51,275 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417336815] [2021-06-05 04:41:51,275 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 712 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 712 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:41:51,301 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:41:51,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:41:51,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:41:51,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:41:51,483 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:51,484 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:51,484 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 27 treesize of output 21 [2021-06-05 04:41:51,485 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:41:51,487 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:51,487 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 27 treesize of output 21 [2021-06-05 04:41:51,488 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:41:51,509 INFO L628 ElimStorePlain]: treesize reduction 36, result has 47.8 percent of original size [2021-06-05 04:41:51,511 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:51,511 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 21 treesize of output 13 [2021-06-05 04:41:51,512 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:41:51,518 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:41:51,519 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 04:41:51,519 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-06-05 04:41:51,557 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 04:41:51,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [417336815] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:51,558 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:41:51,558 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 04:41:51,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413584913] [2021-06-05 04:41:51,558 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 04:41:51,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:41:51,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 04:41:51,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=490, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:41:51,558 INFO L87 Difference]: Start difference. First operand 230 states and 503 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:41:51,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:41:51,828 INFO L93 Difference]: Finished difference Result 268 states and 563 transitions. [2021-06-05 04:41:51,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:41:51,829 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:41:51,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:41:51,829 INFO L225 Difference]: With dead ends: 268 [2021-06-05 04:41:51,829 INFO L226 Difference]: Without dead ends: 237 [2021-06-05 04:41:51,829 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 436.6ms TimeCoverageRelationStatistics Valid=76, Invalid=626, Unknown=0, NotChecked=0, Total=702 [2021-06-05 04:41:51,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2021-06-05 04:41:51,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 234. [2021-06-05 04:41:51,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 233 states have (on average 2.1931330472103006) internal successors, (511), 233 states have internal predecessors, (511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:41:51,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 511 transitions. [2021-06-05 04:41:51,831 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 511 transitions. Word has length 20 [2021-06-05 04:41:51,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:41:51,831 INFO L482 AbstractCegarLoop]: Abstraction has 234 states and 511 transitions. [2021-06-05 04:41:51,831 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:41:51,831 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 511 transitions. [2021-06-05 04:41:51,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:41:51,831 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:41:51,831 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:41:52,032 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 712 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3549 [2021-06-05 04:41:52,032 INFO L430 AbstractCegarLoop]: === Iteration 718 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:41:52,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:41:52,032 INFO L82 PathProgramCache]: Analyzing trace with hash 1319947626, now seen corresponding path program 712 times [2021-06-05 04:41:52,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:41:52,032 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060301352] [2021-06-05 04:41:52,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:41:52,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:41:52,305 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 04:41:52,305 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:41:52,305 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060301352] [2021-06-05 04:41:52,305 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060301352] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:52,305 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13775048] [2021-06-05 04:41:52,305 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 713 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 713 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:41:52,330 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:41:52,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:41:52,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:41:52,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:41:52,518 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:52,518 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:52,519 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 27 treesize of output 21 [2021-06-05 04:41:52,519 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:41:52,521 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:52,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 04:41:52,522 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:41:52,545 INFO L628 ElimStorePlain]: treesize reduction 36, result has 42.9 percent of original size [2021-06-05 04:41:52,546 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:52,547 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 10 treesize of output 6 [2021-06-05 04:41:52,548 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:41:52,555 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:41:52,555 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 04:41:52,555 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-06-05 04:41:52,597 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 04:41:52,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [13775048] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:52,598 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:41:52,598 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 04:41:52,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944107033] [2021-06-05 04:41:52,598 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 04:41:52,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:41:52,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 04:41:52,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:41:52,598 INFO L87 Difference]: Start difference. First operand 234 states and 511 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:41:52,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:41:52,907 INFO L93 Difference]: Finished difference Result 255 states and 544 transitions. [2021-06-05 04:41:52,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:41:52,907 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:41:52,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:41:52,908 INFO L225 Difference]: With dead ends: 255 [2021-06-05 04:41:52,908 INFO L226 Difference]: Without dead ends: 239 [2021-06-05 04:41:52,908 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 575.3ms TimeCoverageRelationStatistics Valid=87, Invalid=725, Unknown=0, NotChecked=0, Total=812 [2021-06-05 04:41:52,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2021-06-05 04:41:52,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 235. [2021-06-05 04:41:52,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 2.1923076923076925) internal successors, (513), 234 states have internal predecessors, (513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:41:52,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 513 transitions. [2021-06-05 04:41:52,909 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 513 transitions. Word has length 20 [2021-06-05 04:41:52,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:41:52,910 INFO L482 AbstractCegarLoop]: Abstraction has 235 states and 513 transitions. [2021-06-05 04:41:52,910 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:41:52,910 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 513 transitions. [2021-06-05 04:41:52,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:41:52,910 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:41:52,910 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:41:53,110 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 713 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3550 [2021-06-05 04:41:53,110 INFO L430 AbstractCegarLoop]: === Iteration 719 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:41:53,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:41:53,110 INFO L82 PathProgramCache]: Analyzing trace with hash -2113014606, now seen corresponding path program 713 times [2021-06-05 04:41:53,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:41:53,111 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366579217] [2021-06-05 04:41:53,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:41:53,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:41:53,321 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:41:53,321 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:41:53,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366579217] [2021-06-05 04:41:53,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366579217] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:53,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [184228584] [2021-06-05 04:41:53,322 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 714 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 714 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:41:53,348 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:41:53,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:41:53,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:41:53,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:41:53,544 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:53,545 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:53,545 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 27 treesize of output 21 [2021-06-05 04:41:53,546 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:41:53,548 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:53,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 04:41:53,549 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:41:53,572 INFO L628 ElimStorePlain]: treesize reduction 42, result has 44.0 percent of original size [2021-06-05 04:41:53,573 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:53,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 04:41:53,574 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:41:53,581 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:41:53,582 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:41:53,582 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-06-05 04:41:53,625 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 04:41:53,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [184228584] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:53,625 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:41:53,625 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 04:41:53,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168960349] [2021-06-05 04:41:53,625 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 04:41:53,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:41:53,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 04:41:53,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=534, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:41:53,625 INFO L87 Difference]: Start difference. First operand 235 states and 513 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:41:54,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:41:54,132 INFO L93 Difference]: Finished difference Result 265 states and 565 transitions. [2021-06-05 04:41:54,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:41:54,132 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:41:54,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:41:54,132 INFO L225 Difference]: With dead ends: 265 [2021-06-05 04:41:54,132 INFO L226 Difference]: Without dead ends: 246 [2021-06-05 04:41:54,133 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 618.4ms TimeCoverageRelationStatistics Valid=103, Invalid=889, Unknown=0, NotChecked=0, Total=992 [2021-06-05 04:41:54,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2021-06-05 04:41:54,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 236. [2021-06-05 04:41:54,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 235 states have (on average 2.1914893617021276) internal successors, (515), 235 states have internal predecessors, (515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:41:54,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 515 transitions. [2021-06-05 04:41:54,134 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 515 transitions. Word has length 20 [2021-06-05 04:41:54,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:41:54,134 INFO L482 AbstractCegarLoop]: Abstraction has 236 states and 515 transitions. [2021-06-05 04:41:54,134 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:41:54,134 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 515 transitions. [2021-06-05 04:41:54,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:41:54,135 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:41:54,135 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:41:54,335 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 714 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3551 [2021-06-05 04:41:54,335 INFO L430 AbstractCegarLoop]: === Iteration 720 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:41:54,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:41:54,335 INFO L82 PathProgramCache]: Analyzing trace with hash -976829334, now seen corresponding path program 714 times [2021-06-05 04:41:54,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:41:54,335 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838480276] [2021-06-05 04:41:54,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:41:54,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:41:54,541 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 04:41:54,541 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:41:54,542 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838480276] [2021-06-05 04:41:54,542 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838480276] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:54,542 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95563911] [2021-06-05 04:41:54,542 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 715 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 715 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:41:54,568 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:41:54,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:41:54,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:41:54,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:41:54,738 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:54,739 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:54,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:41:54,740 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:41:54,742 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:54,743 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:54,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:41:54,744 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:41:54,746 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:54,746 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:54,747 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 19 treesize of output 15 [2021-06-05 04:41:54,747 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:41:54,750 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:54,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:41:54,750 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:41:54,806 INFO L628 ElimStorePlain]: treesize reduction 77, result has 45.4 percent of original size [2021-06-05 04:41:54,808 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:54,808 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:54,809 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 10 treesize of output 6 [2021-06-05 04:41:54,810 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:41:54,812 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:54,812 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 10 treesize of output 6 [2021-06-05 04:41:54,813 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:41:54,836 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:41:54,837 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 04:41:54,837 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:173, output treesize:38 [2021-06-05 04:41:54,915 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 04:41:54,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [95563911] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:54,915 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:41:54,916 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 04:41:54,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149912798] [2021-06-05 04:41:54,916 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 04:41:54,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:41:54,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 04:41:54,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:41:54,916 INFO L87 Difference]: Start difference. First operand 236 states and 515 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:41:55,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:41:55,388 INFO L93 Difference]: Finished difference Result 262 states and 557 transitions. [2021-06-05 04:41:55,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:41:55,389 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:41:55,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:41:55,389 INFO L225 Difference]: With dead ends: 262 [2021-06-05 04:41:55,389 INFO L226 Difference]: Without dead ends: 247 [2021-06-05 04:41:55,389 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 601.2ms TimeCoverageRelationStatistics Valid=101, Invalid=829, Unknown=0, NotChecked=0, Total=930 [2021-06-05 04:41:55,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2021-06-05 04:41:55,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 233. [2021-06-05 04:41:55,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 232 states have (on average 2.1939655172413794) internal successors, (509), 232 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:41:55,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 509 transitions. [2021-06-05 04:41:55,394 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 509 transitions. Word has length 20 [2021-06-05 04:41:55,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:41:55,394 INFO L482 AbstractCegarLoop]: Abstraction has 233 states and 509 transitions. [2021-06-05 04:41:55,394 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:41:55,394 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 509 transitions. [2021-06-05 04:41:55,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:41:55,395 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:41:55,395 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:41:55,595 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3552,715 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:41:55,595 INFO L430 AbstractCegarLoop]: === Iteration 721 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:41:55,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:41:55,595 INFO L82 PathProgramCache]: Analyzing trace with hash 434149346, now seen corresponding path program 715 times [2021-06-05 04:41:55,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:41:55,595 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587896550] [2021-06-05 04:41:55,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:41:55,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:41:55,774 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 04:41:55,774 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:41:55,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587896550] [2021-06-05 04:41:55,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587896550] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:55,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217675867] [2021-06-05 04:41:55,774 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 716 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 716 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:41:55,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:41:55,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:41:55,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:41:55,970 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:55,970 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:55,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 04:41:55,971 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:41:55,973 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:55,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 04:41:55,974 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:41:55,995 INFO L628 ElimStorePlain]: treesize reduction 42, result has 39.1 percent of original size [2021-06-05 04:41:55,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:55,997 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 10 treesize of output 6 [2021-06-05 04:41:55,999 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:41:56,005 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:41:56,006 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:41:56,006 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-06-05 04:41:56,047 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 04:41:56,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [217675867] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:56,048 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:41:56,048 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 04:41:56,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652844690] [2021-06-05 04:41:56,048 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 04:41:56,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:41:56,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 04:41:56,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:41:56,048 INFO L87 Difference]: Start difference. First operand 233 states and 509 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:41:56,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:41:56,308 INFO L93 Difference]: Finished difference Result 255 states and 544 transitions. [2021-06-05 04:41:56,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:41:56,308 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:41:56,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:41:56,309 INFO L225 Difference]: With dead ends: 255 [2021-06-05 04:41:56,309 INFO L226 Difference]: Without dead ends: 239 [2021-06-05 04:41:56,309 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 432.5ms TimeCoverageRelationStatistics Valid=86, Invalid=670, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:41:56,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2021-06-05 04:41:56,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 235. [2021-06-05 04:41:56,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 2.1923076923076925) internal successors, (513), 234 states have internal predecessors, (513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:41:56,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 513 transitions. [2021-06-05 04:41:56,310 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 513 transitions. Word has length 20 [2021-06-05 04:41:56,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:41:56,311 INFO L482 AbstractCegarLoop]: Abstraction has 235 states and 513 transitions. [2021-06-05 04:41:56,311 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:41:56,311 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 513 transitions. [2021-06-05 04:41:56,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:41:56,311 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:41:56,311 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:41:56,511 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3555,716 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:41:56,511 INFO L430 AbstractCegarLoop]: === Iteration 722 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:41:56,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:41:56,512 INFO L82 PathProgramCache]: Analyzing trace with hash 1296154410, now seen corresponding path program 716 times [2021-06-05 04:41:56,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:41:56,512 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113770705] [2021-06-05 04:41:56,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:41:56,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:41:56,706 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 04:41:56,706 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:41:56,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113770705] [2021-06-05 04:41:56,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113770705] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:56,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702495678] [2021-06-05 04:41:56,706 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 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 04:41:56,731 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:41:56,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:41:56,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 04:41:56,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:41:56,914 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:56,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 04:41:56,915 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:41:56,921 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:41:56,922 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:56,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 04:41:56,923 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:41:56,929 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:41:56,930 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 04:41:56,930 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:38, output treesize:13 [2021-06-05 04:41:56,966 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:41:56,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [702495678] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:56,966 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:41:56,966 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 04:41:56,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667769180] [2021-06-05 04:41:56,966 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 04:41:56,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:41:56,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 04:41:56,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:41:56,966 INFO L87 Difference]: Start difference. First operand 235 states and 513 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:41:57,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:41:57,468 INFO L93 Difference]: Finished difference Result 258 states and 558 transitions. [2021-06-05 04:41:57,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:41:57,469 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:41:57,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:41:57,469 INFO L225 Difference]: With dead ends: 258 [2021-06-05 04:41:57,469 INFO L226 Difference]: Without dead ends: 251 [2021-06-05 04:41:57,469 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 562.4ms TimeCoverageRelationStatistics Valid=106, Invalid=824, Unknown=0, NotChecked=0, Total=930 [2021-06-05 04:41:57,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2021-06-05 04:41:57,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 236. [2021-06-05 04:41:57,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 235 states have (on average 2.195744680851064) internal successors, (516), 235 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:41:57,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 516 transitions. [2021-06-05 04:41:57,471 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 516 transitions. Word has length 20 [2021-06-05 04:41:57,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:41:57,471 INFO L482 AbstractCegarLoop]: Abstraction has 236 states and 516 transitions. [2021-06-05 04:41:57,471 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:41:57,471 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 516 transitions. [2021-06-05 04:41:57,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:41:57,471 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:41:57,471 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:41:57,672 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3556,717 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:41:57,672 INFO L430 AbstractCegarLoop]: === Iteration 723 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:41:57,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:41:57,672 INFO L82 PathProgramCache]: Analyzing trace with hash -1862627614, now seen corresponding path program 717 times [2021-06-05 04:41:57,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:41:57,672 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653066649] [2021-06-05 04:41:57,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:41:57,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:41:57,877 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 04:41:57,877 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:41:57,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653066649] [2021-06-05 04:41:57,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653066649] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:57,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908299390] [2021-06-05 04:41:57,877 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 718 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 718 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:41:57,904 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:41:57,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:41:57,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:41:57,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:41:58,058 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:58,058 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:58,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:41:58,059 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:41:58,062 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:58,062 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:58,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:41:58,063 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:41:58,065 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:58,066 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:58,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:41:58,066 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:41:58,069 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:58,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:41:58,070 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:41:58,125 INFO L628 ElimStorePlain]: treesize reduction 77, result has 45.4 percent of original size [2021-06-05 04:41:58,127 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:58,127 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:58,128 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 10 treesize of output 6 [2021-06-05 04:41:58,129 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:41:58,131 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:58,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:41:58,133 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:41:58,155 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:41:58,156 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:41:58,156 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:173, output treesize:38 [2021-06-05 04:41:58,243 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 04:41:58,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [908299390] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:58,243 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:41:58,243 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 04:41:58,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207785288] [2021-06-05 04:41:58,243 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 04:41:58,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:41:58,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 04:41:58,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:41:58,244 INFO L87 Difference]: Start difference. First operand 236 states and 516 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:41:58,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:41:58,895 INFO L93 Difference]: Finished difference Result 292 states and 608 transitions. [2021-06-05 04:41:58,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:41:58,896 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:41:58,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:41:58,896 INFO L225 Difference]: With dead ends: 292 [2021-06-05 04:41:58,896 INFO L226 Difference]: Without dead ends: 270 [2021-06-05 04:41:58,896 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 743.1ms TimeCoverageRelationStatistics Valid=126, Invalid=996, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 04:41:58,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2021-06-05 04:41:58,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 234. [2021-06-05 04:41:58,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 233 states have (on average 2.1931330472103006) internal successors, (511), 233 states have internal predecessors, (511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:41:58,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 511 transitions. [2021-06-05 04:41:58,898 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 511 transitions. Word has length 20 [2021-06-05 04:41:58,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:41:58,898 INFO L482 AbstractCegarLoop]: Abstraction has 234 states and 511 transitions. [2021-06-05 04:41:58,898 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:41:58,898 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 511 transitions. [2021-06-05 04:41:58,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:41:58,899 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:41:58,899 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:41:59,099 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3557,718 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:41:59,099 INFO L430 AbstractCegarLoop]: === Iteration 724 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:41:59,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:41:59,099 INFO L82 PathProgramCache]: Analyzing trace with hash -810629710, now seen corresponding path program 718 times [2021-06-05 04:41:59,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:41:59,099 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007372346] [2021-06-05 04:41:59,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:41:59,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:41:59,285 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:41:59,285 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:41:59,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007372346] [2021-06-05 04:41:59,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007372346] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:59,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261323658] [2021-06-05 04:41:59,286 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 719 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 719 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:41:59,311 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:41:59,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:41:59,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:41:59,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:41:59,472 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:59,473 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:59,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 04:41:59,474 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:41:59,476 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:59,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 04:41:59,477 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:41:59,499 INFO L628 ElimStorePlain]: treesize reduction 36, result has 42.9 percent of original size [2021-06-05 04:41:59,501 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:41:59,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:41:59,502 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:41:59,509 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:41:59,510 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 04:41:59,510 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-06-05 04:41:59,550 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 04:41:59,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1261323658] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:59,554 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:41:59,554 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 04:41:59,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686356113] [2021-06-05 04:41:59,554 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 04:41:59,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:41:59,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 04:41:59,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:41:59,554 INFO L87 Difference]: Start difference. First operand 234 states and 511 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:41:59,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:41:59,918 INFO L93 Difference]: Finished difference Result 259 states and 557 transitions. [2021-06-05 04:41:59,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:41:59,918 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:41:59,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:41:59,918 INFO L225 Difference]: With dead ends: 259 [2021-06-05 04:41:59,918 INFO L226 Difference]: Without dead ends: 246 [2021-06-05 04:41:59,919 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 473.7ms TimeCoverageRelationStatistics Valid=103, Invalid=767, Unknown=0, NotChecked=0, Total=870 [2021-06-05 04:41:59,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2021-06-05 04:41:59,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 236. [2021-06-05 04:41:59,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 235 states have (on average 2.1914893617021276) internal successors, (515), 235 states have internal predecessors, (515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:41:59,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 515 transitions. [2021-06-05 04:41:59,920 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 515 transitions. Word has length 20 [2021-06-05 04:41:59,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:41:59,920 INFO L482 AbstractCegarLoop]: Abstraction has 236 states and 515 transitions. [2021-06-05 04:41:59,920 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:41:59,921 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 515 transitions. [2021-06-05 04:41:59,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:41:59,921 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:41:59,921 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:42:00,121 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 719 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3560 [2021-06-05 04:42:00,121 INFO L430 AbstractCegarLoop]: === Iteration 725 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:42:00,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:42:00,121 INFO L82 PathProgramCache]: Analyzing trace with hash 325555562, now seen corresponding path program 719 times [2021-06-05 04:42:00,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:42:00,122 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079880501] [2021-06-05 04:42:00,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:42:00,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:42:00,286 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 04:42:00,286 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:42:00,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079880501] [2021-06-05 04:42:00,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079880501] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:00,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877861815] [2021-06-05 04:42:00,286 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 720 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 720 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:42:00,312 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 04:42:00,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:42:00,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:42:00,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:42:00,447 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:00,447 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:00,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:42:00,448 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:00,451 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:00,451 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:00,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:42:00,452 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:00,455 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:00,455 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:00,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:42:00,456 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:00,458 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:00,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:42:00,459 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:00,513 INFO L628 ElimStorePlain]: treesize reduction 80, result has 45.6 percent of original size [2021-06-05 04:42:00,515 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:00,516 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:00,516 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 10 treesize of output 6 [2021-06-05 04:42:00,517 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:42:00,519 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:00,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 04:42:00,521 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:42:00,544 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:42:00,545 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 04:42:00,545 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:173, output treesize:38 [2021-06-05 04:42:00,619 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:42:00,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1877861815] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:00,619 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:42:00,619 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 04:42:00,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202777468] [2021-06-05 04:42:00,619 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 04:42:00,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:42:00,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 04:42:00,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:42:00,619 INFO L87 Difference]: Start difference. First operand 236 states and 515 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:42:00,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:42:00,920 INFO L93 Difference]: Finished difference Result 260 states and 553 transitions. [2021-06-05 04:42:00,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:42:00,920 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:42:00,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:42:00,920 INFO L225 Difference]: With dead ends: 260 [2021-06-05 04:42:00,920 INFO L226 Difference]: Without dead ends: 245 [2021-06-05 04:42:00,920 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 478.0ms TimeCoverageRelationStatistics Valid=107, Invalid=763, Unknown=0, NotChecked=0, Total=870 [2021-06-05 04:42:00,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2021-06-05 04:42:00,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 232. [2021-06-05 04:42:00,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 231 states have (on average 2.1948051948051948) internal successors, (507), 231 states have internal predecessors, (507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:42:00,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 507 transitions. [2021-06-05 04:42:00,922 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 507 transitions. Word has length 20 [2021-06-05 04:42:00,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:42:00,922 INFO L482 AbstractCegarLoop]: Abstraction has 232 states and 507 transitions. [2021-06-05 04:42:00,922 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:42:00,922 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 507 transitions. [2021-06-05 04:42:00,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:42:00,922 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:42:00,922 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:42:01,123 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3561,720 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:42:01,123 INFO L430 AbstractCegarLoop]: === Iteration 726 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:42:01,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:42:01,123 INFO L82 PathProgramCache]: Analyzing trace with hash -1820615198, now seen corresponding path program 720 times [2021-06-05 04:42:01,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:42:01,123 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869021790] [2021-06-05 04:42:01,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:42:01,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:42:01,340 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 04:42:01,340 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:42:01,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869021790] [2021-06-05 04:42:01,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869021790] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:01,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95432062] [2021-06-05 04:42:01,340 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 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 04:42:01,366 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:42:01,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:42:01,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:42:01,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:42:01,522 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:01,522 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:01,523 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 19 treesize of output 15 [2021-06-05 04:42:01,523 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:01,526 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:01,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:42:01,527 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:01,588 INFO L628 ElimStorePlain]: treesize reduction 85, result has 45.9 percent of original size [2021-06-05 04:42:01,591 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:01,591 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 10 treesize of output 6 [2021-06-05 04:42:01,592 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:42:01,616 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:42:01,618 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:01,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:42:01,619 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:01,640 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:42:01,643 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:01,643 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 13 treesize of output 9 [2021-06-05 04:42:01,644 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:42:01,665 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:42:01,666 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 04:42:01,666 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-06-05 04:42:01,746 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:42:01,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [95432062] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:01,747 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:42:01,747 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 04:42:01,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977290083] [2021-06-05 04:42:01,747 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 04:42:01,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:42:01,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 04:42:01,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:42:01,747 INFO L87 Difference]: Start difference. First operand 232 states and 507 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:42:02,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:42:02,233 INFO L93 Difference]: Finished difference Result 301 states and 634 transitions. [2021-06-05 04:42:02,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 04:42:02,233 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:42:02,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:42:02,234 INFO L225 Difference]: With dead ends: 301 [2021-06-05 04:42:02,234 INFO L226 Difference]: Without dead ends: 282 [2021-06-05 04:42:02,234 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 563.2ms TimeCoverageRelationStatistics Valid=107, Invalid=763, Unknown=0, NotChecked=0, Total=870 [2021-06-05 04:42:02,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2021-06-05 04:42:02,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 232. [2021-06-05 04:42:02,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 231 states have (on average 2.1948051948051948) internal successors, (507), 231 states have internal predecessors, (507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:42:02,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 507 transitions. [2021-06-05 04:42:02,236 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 507 transitions. Word has length 20 [2021-06-05 04:42:02,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:42:02,236 INFO L482 AbstractCegarLoop]: Abstraction has 232 states and 507 transitions. [2021-06-05 04:42:02,236 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:42:02,236 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 507 transitions. [2021-06-05 04:42:02,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:42:02,236 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:42:02,236 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:42:02,437 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3564,721 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:42:02,437 INFO L430 AbstractCegarLoop]: === Iteration 727 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:42:02,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:42:02,437 INFO L82 PathProgramCache]: Analyzing trace with hash -1255793558, now seen corresponding path program 721 times [2021-06-05 04:42:02,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:42:02,437 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598296412] [2021-06-05 04:42:02,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:42:02,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:42:02,576 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 04:42:02,576 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:42:02,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598296412] [2021-06-05 04:42:02,576 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598296412] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:02,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191265225] [2021-06-05 04:42:02,576 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 722 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 722 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:42:02,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:42:02,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:42:02,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:42:02,763 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:02,763 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:02,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 04:42:02,764 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:02,766 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:02,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 04:42:02,767 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:02,789 INFO L628 ElimStorePlain]: treesize reduction 42, result has 39.1 percent of original size [2021-06-05 04:42:02,791 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:02,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:42:02,792 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:42:02,799 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:42:02,799 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:42:02,800 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-06-05 04:42:02,835 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 04:42:02,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1191265225] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:02,835 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:42:02,835 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 04:42:02,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703869378] [2021-06-05 04:42:02,835 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 04:42:02,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:42:02,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 04:42:02,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:42:02,836 INFO L87 Difference]: Start difference. First operand 232 states and 507 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:42:03,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:42:03,246 INFO L93 Difference]: Finished difference Result 259 states and 556 transitions. [2021-06-05 04:42:03,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:42:03,246 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:42:03,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:42:03,247 INFO L225 Difference]: With dead ends: 259 [2021-06-05 04:42:03,247 INFO L226 Difference]: Without dead ends: 243 [2021-06-05 04:42:03,247 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 462.3ms TimeCoverageRelationStatistics Valid=118, Invalid=874, Unknown=0, NotChecked=0, Total=992 [2021-06-05 04:42:03,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2021-06-05 04:42:03,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 235. [2021-06-05 04:42:03,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 2.1923076923076925) internal successors, (513), 234 states have internal predecessors, (513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:42:03,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 513 transitions. [2021-06-05 04:42:03,249 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 513 transitions. Word has length 20 [2021-06-05 04:42:03,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:42:03,249 INFO L482 AbstractCegarLoop]: Abstraction has 235 states and 513 transitions. [2021-06-05 04:42:03,249 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:42:03,249 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 513 transitions. [2021-06-05 04:42:03,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:42:03,249 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:42:03,249 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:42:03,449 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3569,722 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:42:03,450 INFO L430 AbstractCegarLoop]: === Iteration 728 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:42:03,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:42:03,450 INFO L82 PathProgramCache]: Analyzing trace with hash -393788494, now seen corresponding path program 722 times [2021-06-05 04:42:03,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:42:03,450 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068898013] [2021-06-05 04:42:03,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:42:03,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:42:03,614 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 04:42:03,614 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:42:03,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068898013] [2021-06-05 04:42:03,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068898013] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:03,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292352923] [2021-06-05 04:42:03,614 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 723 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 723 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:42:03,640 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:42:03,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:42:03,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 04:42:03,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:42:03,814 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:03,815 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 27 treesize of output 21 [2021-06-05 04:42:03,816 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:03,822 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:42:03,823 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:03,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 04:42:03,824 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:03,830 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:42:03,830 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 04:42:03,830 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:38, output treesize:13 [2021-06-05 04:42:03,848 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 04:42:03,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1292352923] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:03,848 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:42:03,848 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-06-05 04:42:03,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648205891] [2021-06-05 04:42:03,849 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 04:42:03,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:42:03,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 04:42:03,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:42:03,849 INFO L87 Difference]: Start difference. First operand 235 states and 513 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:42:04,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:42:04,169 INFO L93 Difference]: Finished difference Result 252 states and 542 transitions. [2021-06-05 04:42:04,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:42:04,170 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:42:04,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:42:04,170 INFO L225 Difference]: With dead ends: 252 [2021-06-05 04:42:04,170 INFO L226 Difference]: Without dead ends: 245 [2021-06-05 04:42:04,170 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 444.8ms TimeCoverageRelationStatistics Valid=96, Invalid=660, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:42:04,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2021-06-05 04:42:04,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 236. [2021-06-05 04:42:04,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 235 states have (on average 2.195744680851064) internal successors, (516), 235 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:42:04,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 516 transitions. [2021-06-05 04:42:04,172 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 516 transitions. Word has length 20 [2021-06-05 04:42:04,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:42:04,172 INFO L482 AbstractCegarLoop]: Abstraction has 236 states and 516 transitions. [2021-06-05 04:42:04,172 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:42:04,172 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 516 transitions. [2021-06-05 04:42:04,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:42:04,172 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:42:04,172 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:42:04,372 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 723 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3570 [2021-06-05 04:42:04,373 INFO L430 AbstractCegarLoop]: === Iteration 729 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:42:04,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:42:04,373 INFO L82 PathProgramCache]: Analyzing trace with hash 742396778, now seen corresponding path program 723 times [2021-06-05 04:42:04,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:42:04,373 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407962871] [2021-06-05 04:42:04,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:42:04,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:42:04,592 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 04:42:04,592 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:42:04,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407962871] [2021-06-05 04:42:04,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407962871] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:04,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697273070] [2021-06-05 04:42:04,592 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 724 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 724 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:42:04,618 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:42:04,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:42:04,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:42:04,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:42:04,770 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:04,771 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:04,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:42:04,772 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:04,774 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:04,775 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:04,775 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 19 treesize of output 15 [2021-06-05 04:42:04,775 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:04,778 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:04,778 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:04,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:42:04,779 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:04,782 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:04,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:42:04,782 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:04,838 INFO L628 ElimStorePlain]: treesize reduction 83, result has 43.5 percent of original size [2021-06-05 04:42:04,840 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:04,840 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:04,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:42:04,842 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:42:04,844 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:04,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:42:04,845 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:42:04,868 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:42:04,869 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 04:42:04,869 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:173, output treesize:38 [2021-06-05 04:42:04,950 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:42:04,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1697273070] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:04,950 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:42:04,950 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 04:42:04,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962194377] [2021-06-05 04:42:04,951 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 04:42:04,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:42:04,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 04:42:04,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:42:04,951 INFO L87 Difference]: Start difference. First operand 236 states and 516 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:42:05,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:42:05,585 INFO L93 Difference]: Finished difference Result 281 states and 588 transitions. [2021-06-05 04:42:05,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:42:05,585 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:42:05,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:42:05,585 INFO L225 Difference]: With dead ends: 281 [2021-06-05 04:42:05,585 INFO L226 Difference]: Without dead ends: 262 [2021-06-05 04:42:05,585 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 737.0ms TimeCoverageRelationStatistics Valid=130, Invalid=992, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 04:42:05,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-06-05 04:42:05,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 234. [2021-06-05 04:42:05,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 233 states have (on average 2.1931330472103006) internal successors, (511), 233 states have internal predecessors, (511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:42:05,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 511 transitions. [2021-06-05 04:42:05,587 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 511 transitions. Word has length 20 [2021-06-05 04:42:05,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:42:05,587 INFO L482 AbstractCegarLoop]: Abstraction has 234 states and 511 transitions. [2021-06-05 04:42:05,587 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:42:05,587 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 511 transitions. [2021-06-05 04:42:05,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:42:05,588 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:42:05,588 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:42:05,788 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 724 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3571 [2021-06-05 04:42:05,788 INFO L430 AbstractCegarLoop]: === Iteration 730 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:42:05,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:42:05,788 INFO L82 PathProgramCache]: Analyzing trace with hash 1794394682, now seen corresponding path program 724 times [2021-06-05 04:42:05,788 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:42:05,788 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699618702] [2021-06-05 04:42:05,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:42:05,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:42:05,984 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 04:42:05,984 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:42:05,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699618702] [2021-06-05 04:42:05,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699618702] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:05,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641443630] [2021-06-05 04:42:05,984 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 725 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 725 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:42:06,009 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:42:06,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:42:06,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:42:06,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:42:06,166 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:06,166 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:06,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 04:42:06,167 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:06,169 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:06,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 04:42:06,170 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:06,192 INFO L628 ElimStorePlain]: treesize reduction 36, result has 47.8 percent of original size [2021-06-05 04:42:06,194 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:06,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 04:42:06,195 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:06,201 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:42:06,202 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:42:06,202 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-06-05 04:42:06,241 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 04:42:06,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [641443630] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:06,242 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:42:06,242 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 04:42:06,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103467480] [2021-06-05 04:42:06,242 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 04:42:06,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:42:06,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 04:42:06,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:42:06,242 INFO L87 Difference]: Start difference. First operand 234 states and 511 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:42:06,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:42:06,592 INFO L93 Difference]: Finished difference Result 255 states and 548 transitions. [2021-06-05 04:42:06,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:42:06,592 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:42:06,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:42:06,592 INFO L225 Difference]: With dead ends: 255 [2021-06-05 04:42:06,593 INFO L226 Difference]: Without dead ends: 242 [2021-06-05 04:42:06,593 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 491.8ms TimeCoverageRelationStatistics Valid=110, Invalid=760, Unknown=0, NotChecked=0, Total=870 [2021-06-05 04:42:06,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2021-06-05 04:42:06,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 236. [2021-06-05 04:42:06,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 235 states have (on average 2.1914893617021276) internal successors, (515), 235 states have internal predecessors, (515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:42:06,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 515 transitions. [2021-06-05 04:42:06,594 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 515 transitions. Word has length 20 [2021-06-05 04:42:06,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:42:06,594 INFO L482 AbstractCegarLoop]: Abstraction has 236 states and 515 transitions. [2021-06-05 04:42:06,594 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:42:06,595 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 515 transitions. [2021-06-05 04:42:06,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:42:06,595 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:42:06,595 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:42:06,795 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3574,725 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:42:06,795 INFO L430 AbstractCegarLoop]: === Iteration 731 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:42:06,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:42:06,795 INFO L82 PathProgramCache]: Analyzing trace with hash -1364387342, now seen corresponding path program 725 times [2021-06-05 04:42:06,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:42:06,795 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876230250] [2021-06-05 04:42:06,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:42:06,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:42:06,963 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:42:06,963 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:42:06,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876230250] [2021-06-05 04:42:06,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876230250] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:06,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395674994] [2021-06-05 04:42:06,963 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 726 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 726 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:42:06,990 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 04:42:06,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:42:06,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:42:06,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:42:07,120 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:07,120 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:07,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:42:07,121 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:07,124 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:07,124 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:07,124 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 19 treesize of output 15 [2021-06-05 04:42:07,125 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:07,127 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:07,128 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:07,128 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 19 treesize of output 15 [2021-06-05 04:42:07,128 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:07,131 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:07,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:42:07,132 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:07,186 INFO L628 ElimStorePlain]: treesize reduction 80, result has 45.6 percent of original size [2021-06-05 04:42:07,188 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:07,188 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:07,189 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 10 treesize of output 6 [2021-06-05 04:42:07,190 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:42:07,192 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:07,192 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 13 treesize of output 9 [2021-06-05 04:42:07,193 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:42:07,216 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:42:07,217 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 04:42:07,217 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:173, output treesize:38 [2021-06-05 04:42:07,289 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:42:07,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [395674994] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:07,289 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:42:07,289 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 04:42:07,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223831866] [2021-06-05 04:42:07,289 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 04:42:07,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:42:07,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 04:42:07,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:42:07,290 INFO L87 Difference]: Start difference. First operand 236 states and 515 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:42:07,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:42:07,663 INFO L93 Difference]: Finished difference Result 252 states and 540 transitions. [2021-06-05 04:42:07,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:42:07,663 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:42:07,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:42:07,664 INFO L225 Difference]: With dead ends: 252 [2021-06-05 04:42:07,664 INFO L226 Difference]: Without dead ends: 240 [2021-06-05 04:42:07,664 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 516.4ms TimeCoverageRelationStatistics Valid=121, Invalid=809, Unknown=0, NotChecked=0, Total=930 [2021-06-05 04:42:07,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2021-06-05 04:42:07,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 235. [2021-06-05 04:42:07,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 2.1923076923076925) internal successors, (513), 234 states have internal predecessors, (513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:42:07,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 513 transitions. [2021-06-05 04:42:07,665 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 513 transitions. Word has length 20 [2021-06-05 04:42:07,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:42:07,666 INFO L482 AbstractCegarLoop]: Abstraction has 235 states and 513 transitions. [2021-06-05 04:42:07,666 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:42:07,666 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 513 transitions. [2021-06-05 04:42:07,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:42:07,666 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:42:07,666 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:42:07,866 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3575,726 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:42:07,866 INFO L430 AbstractCegarLoop]: === Iteration 732 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:42:07,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:42:07,866 INFO L82 PathProgramCache]: Analyzing trace with hash 784409194, now seen corresponding path program 726 times [2021-06-05 04:42:07,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:42:07,867 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521461384] [2021-06-05 04:42:07,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:42:07,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:42:08,085 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 04:42:08,085 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:42:08,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521461384] [2021-06-05 04:42:08,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521461384] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:08,086 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762396948] [2021-06-05 04:42:08,086 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 727 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 727 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:42:08,112 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:42:08,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:42:08,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 04:42:08,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:42:08,252 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:08,253 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:08,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:42:08,254 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:08,256 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:08,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:42:08,257 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:08,280 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:42:08,282 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:08,282 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:08,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 04:42:08,284 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:42:08,286 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:08,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 04:42:08,287 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:42:08,308 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:42:08,309 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 04:42:08,309 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:35 [2021-06-05 04:42:08,387 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:42:08,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1762396948] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:08,387 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:42:08,387 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 04:42:08,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978744056] [2021-06-05 04:42:08,387 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 04:42:08,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:42:08,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 04:42:08,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:42:08,388 INFO L87 Difference]: Start difference. First operand 235 states and 513 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:42:08,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:42:08,783 INFO L93 Difference]: Finished difference Result 267 states and 578 transitions. [2021-06-05 04:42:08,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:42:08,783 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:42:08,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:42:08,784 INFO L225 Difference]: With dead ends: 267 [2021-06-05 04:42:08,784 INFO L226 Difference]: Without dead ends: 258 [2021-06-05 04:42:08,784 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 560.6ms TimeCoverageRelationStatistics Valid=109, Invalid=761, Unknown=0, NotChecked=0, Total=870 [2021-06-05 04:42:08,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2021-06-05 04:42:08,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 235. [2021-06-05 04:42:08,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 2.1923076923076925) internal successors, (513), 234 states have internal predecessors, (513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:42:08,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 513 transitions. [2021-06-05 04:42:08,785 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 513 transitions. Word has length 20 [2021-06-05 04:42:08,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:42:08,786 INFO L482 AbstractCegarLoop]: Abstraction has 235 states and 513 transitions. [2021-06-05 04:42:08,786 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:42:08,786 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 513 transitions. [2021-06-05 04:42:08,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:42:08,786 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:42:08,786 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:42:08,986 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3578,727 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:42:08,986 INFO L430 AbstractCegarLoop]: === Iteration 733 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:42:08,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:42:08,987 INFO L82 PathProgramCache]: Analyzing trace with hash 908596402, now seen corresponding path program 727 times [2021-06-05 04:42:08,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:42:08,987 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589992659] [2021-06-05 04:42:08,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:42:08,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:42:09,178 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 04:42:09,178 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:42:09,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589992659] [2021-06-05 04:42:09,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589992659] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:09,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490981244] [2021-06-05 04:42:09,178 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 728 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 728 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:42:09,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:42:09,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:42:09,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:42:09,369 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:09,370 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:09,370 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 27 treesize of output 21 [2021-06-05 04:42:09,371 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:09,373 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:09,373 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 27 treesize of output 21 [2021-06-05 04:42:09,374 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:09,395 INFO L628 ElimStorePlain]: treesize reduction 42, result has 39.1 percent of original size [2021-06-05 04:42:09,397 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:09,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:42:09,398 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:42:09,405 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:42:09,406 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:42:09,406 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-06-05 04:42:09,441 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:42:09,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [490981244] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:09,442 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:42:09,442 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 04:42:09,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505517429] [2021-06-05 04:42:09,442 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 04:42:09,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:42:09,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 04:42:09,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:42:09,442 INFO L87 Difference]: Start difference. First operand 235 states and 513 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:42:09,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:42:09,775 INFO L93 Difference]: Finished difference Result 263 states and 564 transitions. [2021-06-05 04:42:09,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:42:09,776 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:42:09,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:42:09,776 INFO L225 Difference]: With dead ends: 263 [2021-06-05 04:42:09,776 INFO L226 Difference]: Without dead ends: 250 [2021-06-05 04:42:09,776 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 448.6ms TimeCoverageRelationStatistics Valid=95, Invalid=661, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:42:09,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2021-06-05 04:42:09,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 238. [2021-06-05 04:42:09,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 237 states have (on average 2.189873417721519) internal successors, (519), 237 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:42:09,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 519 transitions. [2021-06-05 04:42:09,778 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 519 transitions. Word has length 20 [2021-06-05 04:42:09,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:42:09,778 INFO L482 AbstractCegarLoop]: Abstraction has 238 states and 519 transitions. [2021-06-05 04:42:09,778 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:42:09,778 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 519 transitions. [2021-06-05 04:42:09,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:42:09,778 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:42:09,778 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:42:09,979 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 728 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3581 [2021-06-05 04:42:09,979 INFO L430 AbstractCegarLoop]: === Iteration 734 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:42:09,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:42:09,979 INFO L82 PathProgramCache]: Analyzing trace with hash 2044781674, now seen corresponding path program 728 times [2021-06-05 04:42:09,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:42:09,979 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661278655] [2021-06-05 04:42:09,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:42:09,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:42:10,248 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 04:42:10,248 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:42:10,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661278655] [2021-06-05 04:42:10,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661278655] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:10,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254734796] [2021-06-05 04:42:10,248 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 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 04:42:10,273 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:42:10,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:42:10,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 04:42:10,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:42:10,411 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:10,412 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:10,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:42:10,413 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:10,415 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:10,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:42:10,416 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:10,437 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:42:10,439 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:10,439 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:10,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 04:42:10,441 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:42:10,443 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:10,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:42:10,444 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:42:10,464 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:42:10,465 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 04:42:10,465 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:35 [2021-06-05 04:42:10,542 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 04:42:10,542 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1254734796] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:10,542 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:42:10,542 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 04:42:10,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332995225] [2021-06-05 04:42:10,542 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 04:42:10,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:42:10,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 04:42:10,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:42:10,542 INFO L87 Difference]: Start difference. First operand 238 states and 519 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:42:11,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:42:11,085 INFO L93 Difference]: Finished difference Result 284 states and 598 transitions. [2021-06-05 04:42:11,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:42:11,086 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:42:11,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:42:11,086 INFO L225 Difference]: With dead ends: 284 [2021-06-05 04:42:11,086 INFO L226 Difference]: Without dead ends: 268 [2021-06-05 04:42:11,086 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 775.7ms TimeCoverageRelationStatistics Valid=128, Invalid=928, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 04:42:11,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2021-06-05 04:42:11,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 237. [2021-06-05 04:42:11,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 236 states have (on average 2.190677966101695) internal successors, (517), 236 states have internal predecessors, (517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:42:11,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 517 transitions. [2021-06-05 04:42:11,088 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 517 transitions. Word has length 20 [2021-06-05 04:42:11,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:42:11,088 INFO L482 AbstractCegarLoop]: Abstraction has 237 states and 517 transitions. [2021-06-05 04:42:11,088 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:42:11,088 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 517 transitions. [2021-06-05 04:42:11,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:42:11,088 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:42:11,088 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:42:11,289 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 729 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3582 [2021-06-05 04:42:11,289 INFO L430 AbstractCegarLoop]: === Iteration 735 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:42:11,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:42:11,289 INFO L82 PathProgramCache]: Analyzing trace with hash -101389086, now seen corresponding path program 729 times [2021-06-05 04:42:11,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:42:11,289 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883917422] [2021-06-05 04:42:11,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:42:11,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:42:11,501 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:42:11,501 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:42:11,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883917422] [2021-06-05 04:42:11,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883917422] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:11,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513156926] [2021-06-05 04:42:11,501 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 730 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 730 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:42:11,528 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 04:42:11,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:42:11,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 04:42:11,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:42:11,679 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:11,680 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:11,680 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 19 treesize of output 15 [2021-06-05 04:42:11,681 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:11,683 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:11,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:42:11,684 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:11,736 INFO L628 ElimStorePlain]: treesize reduction 78, result has 44.3 percent of original size [2021-06-05 04:42:11,738 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:11,739 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 10 treesize of output 6 [2021-06-05 04:42:11,740 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:42:11,760 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:42:11,763 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:11,763 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 19 treesize of output 15 [2021-06-05 04:42:11,764 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:11,782 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:42:11,785 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:11,785 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 13 treesize of output 9 [2021-06-05 04:42:11,786 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:42:11,804 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:42:11,806 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 04:42:11,806 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:153, output treesize:32 [2021-06-05 04:42:11,887 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 04:42:11,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [513156926] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:11,888 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:42:11,888 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 04:42:11,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356264021] [2021-06-05 04:42:11,888 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 04:42:11,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:42:11,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 04:42:11,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:42:11,888 INFO L87 Difference]: Start difference. First operand 237 states and 517 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:42:12,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:42:12,738 INFO L93 Difference]: Finished difference Result 312 states and 648 transitions. [2021-06-05 04:42:12,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 04:42:12,739 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:42:12,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:42:12,739 INFO L225 Difference]: With dead ends: 312 [2021-06-05 04:42:12,739 INFO L226 Difference]: Without dead ends: 286 [2021-06-05 04:42:12,739 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 923.2ms TimeCoverageRelationStatistics Valid=144, Invalid=1116, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 04:42:12,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2021-06-05 04:42:12,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 237. [2021-06-05 04:42:12,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 236 states have (on average 2.190677966101695) internal successors, (517), 236 states have internal predecessors, (517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:42:12,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 517 transitions. [2021-06-05 04:42:12,741 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 517 transitions. Word has length 20 [2021-06-05 04:42:12,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:42:12,741 INFO L482 AbstractCegarLoop]: Abstraction has 237 states and 517 transitions. [2021-06-05 04:42:12,741 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:42:12,741 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 517 transitions. [2021-06-05 04:42:12,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:42:12,742 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:42:12,742 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:42:12,942 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3585,730 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:42:12,942 INFO L430 AbstractCegarLoop]: === Iteration 736 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:42:12,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:42:12,942 INFO L82 PathProgramCache]: Analyzing trace with hash 2086794090, now seen corresponding path program 730 times [2021-06-05 04:42:12,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:42:12,942 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028011681] [2021-06-05 04:42:12,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:42:12,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:42:13,155 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:42:13,155 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:42:13,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028011681] [2021-06-05 04:42:13,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028011681] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:13,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128682207] [2021-06-05 04:42:13,155 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 731 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 731 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:42:13,180 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:42:13,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:42:13,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:42:13,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:42:13,378 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:13,379 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:13,379 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 19 treesize of output 15 [2021-06-05 04:42:13,380 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:13,383 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:13,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:42:13,384 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:13,444 INFO L628 ElimStorePlain]: treesize reduction 85, result has 46.9 percent of original size [2021-06-05 04:42:13,447 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:13,447 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 13 treesize of output 9 [2021-06-05 04:42:13,448 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:42:13,472 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:42:13,475 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:13,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:42:13,475 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:13,498 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:42:13,500 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:13,500 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 13 treesize of output 9 [2021-06-05 04:42:13,501 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:42:13,522 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:42:13,524 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 04:42:13,524 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-06-05 04:42:13,607 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 04:42:13,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2128682207] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:13,607 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:42:13,607 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 04:42:13,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118774702] [2021-06-05 04:42:13,607 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 04:42:13,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:42:13,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 04:42:13,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:42:13,607 INFO L87 Difference]: Start difference. First operand 237 states and 517 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:42:14,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:42:14,156 INFO L93 Difference]: Finished difference Result 297 states and 626 transitions. [2021-06-05 04:42:14,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 04:42:14,156 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:42:14,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:42:14,157 INFO L225 Difference]: With dead ends: 297 [2021-06-05 04:42:14,157 INFO L226 Difference]: Without dead ends: 278 [2021-06-05 04:42:14,157 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 607.2ms TimeCoverageRelationStatistics Valid=109, Invalid=821, Unknown=0, NotChecked=0, Total=930 [2021-06-05 04:42:14,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2021-06-05 04:42:14,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 237. [2021-06-05 04:42:14,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 236 states have (on average 2.190677966101695) internal successors, (517), 236 states have internal predecessors, (517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:42:14,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 517 transitions. [2021-06-05 04:42:14,159 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 517 transitions. Word has length 20 [2021-06-05 04:42:14,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:42:14,159 INFO L482 AbstractCegarLoop]: Abstraction has 237 states and 517 transitions. [2021-06-05 04:42:14,159 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:42:14,159 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 517 transitions. [2021-06-05 04:42:14,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:42:14,159 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:42:14,159 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:42:14,359 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 731 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3590 [2021-06-05 04:42:14,360 INFO L430 AbstractCegarLoop]: === Iteration 737 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:42:14,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:42:14,360 INFO L82 PathProgramCache]: Analyzing trace with hash -2104416030, now seen corresponding path program 731 times [2021-06-05 04:42:14,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:42:14,360 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502570248] [2021-06-05 04:42:14,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:42:14,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:42:14,543 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:42:14,543 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:42:14,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502570248] [2021-06-05 04:42:14,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502570248] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:14,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444958257] [2021-06-05 04:42:14,543 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 732 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 732 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:42:14,569 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:42:14,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:42:14,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:42:14,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:42:14,747 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:14,747 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:14,747 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 27 treesize of output 21 [2021-06-05 04:42:14,748 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:14,750 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:14,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 04:42:14,751 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:14,773 INFO L628 ElimStorePlain]: treesize reduction 42, result has 39.1 percent of original size [2021-06-05 04:42:14,775 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:14,775 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 10 treesize of output 6 [2021-06-05 04:42:14,776 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:42:14,783 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:42:14,783 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 04:42:14,784 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-06-05 04:42:14,825 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 04:42:14,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1444958257] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:14,825 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:42:14,825 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 04:42:14,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137477535] [2021-06-05 04:42:14,825 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 04:42:14,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:42:14,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 04:42:14,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:42:14,826 INFO L87 Difference]: Start difference. First operand 237 states and 517 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:42:15,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:42:15,127 INFO L93 Difference]: Finished difference Result 264 states and 562 transitions. [2021-06-05 04:42:15,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:42:15,127 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:42:15,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:42:15,128 INFO L225 Difference]: With dead ends: 264 [2021-06-05 04:42:15,128 INFO L226 Difference]: Without dead ends: 248 [2021-06-05 04:42:15,128 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 409.3ms TimeCoverageRelationStatistics Valid=80, Invalid=622, Unknown=0, NotChecked=0, Total=702 [2021-06-05 04:42:15,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2021-06-05 04:42:15,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 241. [2021-06-05 04:42:15,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 2.1875) internal successors, (525), 240 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:42:15,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 525 transitions. [2021-06-05 04:42:15,130 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 525 transitions. Word has length 20 [2021-06-05 04:42:15,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:42:15,130 INFO L482 AbstractCegarLoop]: Abstraction has 241 states and 525 transitions. [2021-06-05 04:42:15,130 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:42:15,130 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 525 transitions. [2021-06-05 04:42:15,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:42:15,130 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:42:15,130 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:42:15,330 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 732 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3595 [2021-06-05 04:42:15,331 INFO L430 AbstractCegarLoop]: === Iteration 738 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:42:15,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:42:15,331 INFO L82 PathProgramCache]: Analyzing trace with hash -1242410966, now seen corresponding path program 732 times [2021-06-05 04:42:15,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:42:15,331 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027387694] [2021-06-05 04:42:15,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:42:15,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:42:15,520 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 04:42:15,520 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:42:15,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027387694] [2021-06-05 04:42:15,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027387694] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:15,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213737303] [2021-06-05 04:42:15,520 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 04:42:15,548 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:42:15,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:42:15,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:42:15,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:42:15,727 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:15,728 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:15,728 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 27 treesize of output 21 [2021-06-05 04:42:15,729 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:15,731 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:15,731 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 27 treesize of output 21 [2021-06-05 04:42:15,732 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:15,754 INFO L628 ElimStorePlain]: treesize reduction 36, result has 47.8 percent of original size [2021-06-05 04:42:15,755 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:15,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 04:42:15,756 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:15,763 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:42:15,763 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:42:15,764 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-06-05 04:42:15,805 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 04:42:15,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1213737303] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:15,805 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:42:15,805 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 04:42:15,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809096657] [2021-06-05 04:42:15,806 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 04:42:15,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:42:15,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 04:42:15,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:42:15,806 INFO L87 Difference]: Start difference. First operand 241 states and 525 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:42:16,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:42:16,290 INFO L93 Difference]: Finished difference Result 266 states and 570 transitions. [2021-06-05 04:42:16,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 04:42:16,291 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:42:16,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:42:16,291 INFO L225 Difference]: With dead ends: 266 [2021-06-05 04:42:16,291 INFO L226 Difference]: Without dead ends: 253 [2021-06-05 04:42:16,291 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 537.0ms TimeCoverageRelationStatistics Valid=103, Invalid=827, Unknown=0, NotChecked=0, Total=930 [2021-06-05 04:42:16,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2021-06-05 04:42:16,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 242. [2021-06-05 04:42:16,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 241 states have (on average 2.1867219917012446) internal successors, (527), 241 states have internal predecessors, (527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:42:16,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 527 transitions. [2021-06-05 04:42:16,293 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 527 transitions. Word has length 20 [2021-06-05 04:42:16,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:42:16,293 INFO L482 AbstractCegarLoop]: Abstraction has 242 states and 527 transitions. [2021-06-05 04:42:16,293 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:42:16,293 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 527 transitions. [2021-06-05 04:42:16,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:42:16,293 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:42:16,293 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:42:16,494 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3596,733 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:42:16,494 INFO L430 AbstractCegarLoop]: === Iteration 739 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:42:16,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:42:16,494 INFO L82 PathProgramCache]: Analyzing trace with hash -106225694, now seen corresponding path program 733 times [2021-06-05 04:42:16,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:42:16,494 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331474849] [2021-06-05 04:42:16,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:42:16,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:42:16,644 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 04:42:16,644 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:42:16,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331474849] [2021-06-05 04:42:16,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331474849] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:16,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [807587853] [2021-06-05 04:42:16,644 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 734 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 734 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:42:16,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:42:16,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:42:16,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:42:16,819 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:16,819 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:16,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:42:16,820 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:16,822 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:16,823 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:16,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:42:16,824 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:16,826 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:16,827 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:16,827 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 19 treesize of output 15 [2021-06-05 04:42:16,827 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:16,830 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:16,830 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 19 treesize of output 15 [2021-06-05 04:42:16,831 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:16,886 INFO L628 ElimStorePlain]: treesize reduction 80, result has 44.4 percent of original size [2021-06-05 04:42:16,888 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:16,888 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:16,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:42:16,890 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:42:16,892 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:16,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:42:16,893 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:42:16,916 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:42:16,917 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 04:42:16,917 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:173, output treesize:38 [2021-06-05 04:42:16,993 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:42:16,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [807587853] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:16,993 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:42:16,993 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 04:42:16,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714648587] [2021-06-05 04:42:16,993 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 04:42:16,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:42:16,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 04:42:16,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:42:16,994 INFO L87 Difference]: Start difference. First operand 242 states and 527 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:42:17,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:42:17,327 INFO L93 Difference]: Finished difference Result 287 states and 601 transitions. [2021-06-05 04:42:17,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 04:42:17,328 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:42:17,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:42:17,328 INFO L225 Difference]: With dead ends: 287 [2021-06-05 04:42:17,328 INFO L226 Difference]: Without dead ends: 268 [2021-06-05 04:42:17,328 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 487.2ms TimeCoverageRelationStatistics Valid=110, Invalid=820, Unknown=0, NotChecked=0, Total=930 [2021-06-05 04:42:17,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2021-06-05 04:42:17,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 240. [2021-06-05 04:42:17,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 239 states have (on average 2.188284518828452) internal successors, (523), 239 states have internal predecessors, (523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:42:17,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 523 transitions. [2021-06-05 04:42:17,330 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 523 transitions. Word has length 20 [2021-06-05 04:42:17,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:42:17,330 INFO L482 AbstractCegarLoop]: Abstraction has 240 states and 523 transitions. [2021-06-05 04:42:17,330 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:42:17,330 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 523 transitions. [2021-06-05 04:42:17,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:42:17,330 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:42:17,330 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:42:17,531 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3597,734 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:42:17,531 INFO L430 AbstractCegarLoop]: === Iteration 740 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:42:17,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:42:17,531 INFO L82 PathProgramCache]: Analyzing trace with hash 945772210, now seen corresponding path program 734 times [2021-06-05 04:42:17,531 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:42:17,531 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716805150] [2021-06-05 04:42:17,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:42:17,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:42:17,689 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 04:42:17,689 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:42:17,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716805150] [2021-06-05 04:42:17,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716805150] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:17,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212695671] [2021-06-05 04:42:17,689 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 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 04:42:17,715 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:42:17,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:42:17,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 04:42:17,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:42:17,874 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:17,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 04:42:17,875 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:17,881 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:42:17,882 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:17,883 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 21 treesize of output 13 [2021-06-05 04:42:17,883 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:17,889 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:42:17,889 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 04:42:17,890 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:38, output treesize:13 [2021-06-05 04:42:17,929 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:42:17,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [212695671] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:17,929 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:42:17,929 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 04:42:17,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220017102] [2021-06-05 04:42:17,929 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 04:42:17,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:42:17,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 04:42:17,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:42:17,929 INFO L87 Difference]: Start difference. First operand 240 states and 523 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:42:18,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:42:18,257 INFO L93 Difference]: Finished difference Result 266 states and 573 transitions. [2021-06-05 04:42:18,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 04:42:18,258 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:42:18,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:42:18,258 INFO L225 Difference]: With dead ends: 266 [2021-06-05 04:42:18,258 INFO L226 Difference]: Without dead ends: 259 [2021-06-05 04:42:18,258 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 463.8ms TimeCoverageRelationStatistics Valid=105, Invalid=765, Unknown=0, NotChecked=0, Total=870 [2021-06-05 04:42:18,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2021-06-05 04:42:18,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 242. [2021-06-05 04:42:18,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 241 states have (on average 2.190871369294606) internal successors, (528), 241 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:42:18,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 528 transitions. [2021-06-05 04:42:18,260 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 528 transitions. Word has length 20 [2021-06-05 04:42:18,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:42:18,260 INFO L482 AbstractCegarLoop]: Abstraction has 242 states and 528 transitions. [2021-06-05 04:42:18,260 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:42:18,260 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 528 transitions. [2021-06-05 04:42:18,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:42:18,260 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:42:18,261 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:42:18,461 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3600,735 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:42:18,461 INFO L430 AbstractCegarLoop]: === Iteration 741 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:42:18,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:42:18,461 INFO L82 PathProgramCache]: Analyzing trace with hash 2081957482, now seen corresponding path program 735 times [2021-06-05 04:42:18,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:42:18,461 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064559577] [2021-06-05 04:42:18,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:42:18,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:42:18,676 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 04:42:18,676 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:42:18,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064559577] [2021-06-05 04:42:18,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064559577] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:18,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1617234141] [2021-06-05 04:42:18,676 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 736 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 736 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:42:18,703 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 04:42:18,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:42:18,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:42:18,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:42:18,846 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:18,846 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:18,847 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 19 treesize of output 15 [2021-06-05 04:42:18,847 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:18,850 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:18,850 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:18,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:42:18,851 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:18,853 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:18,854 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:18,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:42:18,855 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:18,857 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:18,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:42:18,858 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:18,912 INFO L628 ElimStorePlain]: treesize reduction 80, result has 44.4 percent of original size [2021-06-05 04:42:18,914 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:18,915 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:18,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:42:18,916 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:42:18,918 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:18,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:42:18,920 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:42:18,942 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:42:18,943 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:42:18,943 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:173, output treesize:38 [2021-06-05 04:42:19,019 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 04:42:19,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1617234141] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:19,020 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:42:19,020 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 04:42:19,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828322712] [2021-06-05 04:42:19,020 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 04:42:19,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:42:19,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 04:42:19,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:42:19,020 INFO L87 Difference]: Start difference. First operand 242 states and 528 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:42:19,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:42:19,506 INFO L93 Difference]: Finished difference Result 292 states and 610 transitions. [2021-06-05 04:42:19,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 04:42:19,506 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:42:19,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:42:19,507 INFO L225 Difference]: With dead ends: 292 [2021-06-05 04:42:19,507 INFO L226 Difference]: Without dead ends: 273 [2021-06-05 04:42:19,507 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 665.1ms TimeCoverageRelationStatistics Valid=129, Invalid=927, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 04:42:19,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2021-06-05 04:42:19,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 241. [2021-06-05 04:42:19,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 2.1875) internal successors, (525), 240 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:42:19,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 525 transitions. [2021-06-05 04:42:19,509 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 525 transitions. Word has length 20 [2021-06-05 04:42:19,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:42:19,509 INFO L482 AbstractCegarLoop]: Abstraction has 241 states and 525 transitions. [2021-06-05 04:42:19,509 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:42:19,509 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 525 transitions. [2021-06-05 04:42:19,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:42:19,509 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:42:19,510 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:42:19,710 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3601,736 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:42:19,710 INFO L430 AbstractCegarLoop]: === Iteration 742 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:42:19,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:42:19,710 INFO L82 PathProgramCache]: Analyzing trace with hash -64213278, now seen corresponding path program 736 times [2021-06-05 04:42:19,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:42:19,710 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329485809] [2021-06-05 04:42:19,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:42:19,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:42:19,912 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 04:42:19,912 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:42:19,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329485809] [2021-06-05 04:42:19,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329485809] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:19,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759926469] [2021-06-05 04:42:19,912 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 737 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 737 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:42:19,937 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:42:19,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:42:19,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:42:19,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:42:20,096 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:20,096 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:20,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:42:20,097 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:20,100 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:20,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:42:20,101 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:20,161 INFO L628 ElimStorePlain]: treesize reduction 88, result has 45.0 percent of original size [2021-06-05 04:42:20,163 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:20,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:42:20,165 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:42:20,189 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:42:20,191 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:20,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:42:20,192 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:20,213 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:42:20,216 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:20,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:42:20,217 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:42:20,238 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:42:20,239 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:42:20,239 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-06-05 04:42:20,319 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:42:20,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [759926469] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:20,320 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:42:20,320 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 04:42:20,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699285630] [2021-06-05 04:42:20,320 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 04:42:20,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:42:20,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 04:42:20,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:42:20,320 INFO L87 Difference]: Start difference. First operand 241 states and 525 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:42:20,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:42:20,915 INFO L93 Difference]: Finished difference Result 297 states and 626 transitions. [2021-06-05 04:42:20,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 04:42:20,916 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:42:20,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:42:20,916 INFO L225 Difference]: With dead ends: 297 [2021-06-05 04:42:20,916 INFO L226 Difference]: Without dead ends: 278 [2021-06-05 04:42:20,916 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 682.8ms TimeCoverageRelationStatistics Valid=131, Invalid=925, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 04:42:20,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2021-06-05 04:42:20,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 240. [2021-06-05 04:42:20,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 239 states have (on average 2.188284518828452) internal successors, (523), 239 states have internal predecessors, (523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:42:20,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 523 transitions. [2021-06-05 04:42:20,918 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 523 transitions. Word has length 20 [2021-06-05 04:42:20,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:42:20,918 INFO L482 AbstractCegarLoop]: Abstraction has 240 states and 523 transitions. [2021-06-05 04:42:20,918 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:42:20,918 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 523 transitions. [2021-06-05 04:42:20,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:42:20,918 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:42:20,919 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:42:21,119 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3604,737 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:42:21,119 INFO L430 AbstractCegarLoop]: === Iteration 743 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:42:21,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:42:21,119 INFO L82 PathProgramCache]: Analyzing trace with hash 59973930, now seen corresponding path program 737 times [2021-06-05 04:42:21,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:42:21,119 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440642079] [2021-06-05 04:42:21,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:42:21,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:42:21,281 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:42:21,281 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:42:21,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440642079] [2021-06-05 04:42:21,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440642079] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:21,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541207703] [2021-06-05 04:42:21,281 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 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 04:42:21,307 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:42:21,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:42:21,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:42:21,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:42:21,470 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:21,471 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:21,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 04:42:21,472 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:21,474 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:21,474 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 27 treesize of output 21 [2021-06-05 04:42:21,475 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:21,497 INFO L628 ElimStorePlain]: treesize reduction 48, result has 36.0 percent of original size [2021-06-05 04:42:21,499 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:21,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:42:21,501 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:42:21,507 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:42:21,508 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:42:21,508 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-06-05 04:42:21,549 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:42:21,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [541207703] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:21,549 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:42:21,549 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 04:42:21,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765946294] [2021-06-05 04:42:21,549 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 04:42:21,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:42:21,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 04:42:21,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:42:21,549 INFO L87 Difference]: Start difference. First operand 240 states and 523 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:42:21,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:42:21,834 INFO L93 Difference]: Finished difference Result 268 states and 574 transitions. [2021-06-05 04:42:21,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 04:42:21,835 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:42:21,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:42:21,835 INFO L225 Difference]: With dead ends: 268 [2021-06-05 04:42:21,835 INFO L226 Difference]: Without dead ends: 255 [2021-06-05 04:42:21,835 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 401.9ms TimeCoverageRelationStatistics Valid=93, Invalid=663, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:42:21,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2021-06-05 04:42:21,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 243. [2021-06-05 04:42:21,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 242 states have (on average 2.1859504132231407) internal successors, (529), 242 states have internal predecessors, (529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:42:21,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 529 transitions. [2021-06-05 04:42:21,837 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 529 transitions. Word has length 20 [2021-06-05 04:42:21,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:42:21,837 INFO L482 AbstractCegarLoop]: Abstraction has 243 states and 529 transitions. [2021-06-05 04:42:21,837 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:42:21,837 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 529 transitions. [2021-06-05 04:42:21,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:42:21,837 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:42:21,837 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:42:22,038 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 738 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3609 [2021-06-05 04:42:22,038 INFO L430 AbstractCegarLoop]: === Iteration 744 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:42:22,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:42:22,038 INFO L82 PathProgramCache]: Analyzing trace with hash 1196159202, now seen corresponding path program 738 times [2021-06-05 04:42:22,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:42:22,038 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329967959] [2021-06-05 04:42:22,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:42:22,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:42:22,255 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:42:22,255 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:42:22,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329967959] [2021-06-05 04:42:22,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329967959] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:22,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796693852] [2021-06-05 04:42:22,255 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 739 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 739 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:42:22,281 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:42:22,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:42:22,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:42:22,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:42:22,420 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:22,420 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:22,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:42:22,421 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:22,424 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:22,424 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:22,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:42:22,425 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:22,427 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:22,428 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:22,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:42:22,429 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:22,432 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:22,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:42:22,433 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:22,488 INFO L628 ElimStorePlain]: treesize reduction 80, result has 46.7 percent of original size [2021-06-05 04:42:22,490 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:22,491 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:22,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 04:42:22,492 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:42:22,494 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:22,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 04:42:22,496 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:42:22,519 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:42:22,520 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 04:42:22,520 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:173, output treesize:38 [2021-06-05 04:42:22,599 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 04:42:22,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [796693852] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:22,600 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:42:22,600 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 04:42:22,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477863748] [2021-06-05 04:42:22,600 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 04:42:22,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:42:22,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 04:42:22,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:42:22,600 INFO L87 Difference]: Start difference. First operand 243 states and 529 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:42:23,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:42:23,038 INFO L93 Difference]: Finished difference Result 290 states and 607 transitions. [2021-06-05 04:42:23,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 04:42:23,039 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:42:23,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:42:23,039 INFO L225 Difference]: With dead ends: 290 [2021-06-05 04:42:23,039 INFO L226 Difference]: Without dead ends: 271 [2021-06-05 04:42:23,039 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 587.2ms TimeCoverageRelationStatistics Valid=111, Invalid=759, Unknown=0, NotChecked=0, Total=870 [2021-06-05 04:42:23,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2021-06-05 04:42:23,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 242. [2021-06-05 04:42:23,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 241 states have (on average 2.1867219917012446) internal successors, (527), 241 states have internal predecessors, (527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:42:23,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 527 transitions. [2021-06-05 04:42:23,041 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 527 transitions. Word has length 20 [2021-06-05 04:42:23,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:42:23,041 INFO L482 AbstractCegarLoop]: Abstraction has 242 states and 527 transitions. [2021-06-05 04:42:23,041 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:42:23,041 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 527 transitions. [2021-06-05 04:42:23,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:42:23,041 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:42:23,041 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:42:23,242 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3610,739 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:42:23,242 INFO L430 AbstractCegarLoop]: === Iteration 745 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:42:23,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:42:23,242 INFO L82 PathProgramCache]: Analyzing trace with hash -950011558, now seen corresponding path program 739 times [2021-06-05 04:42:23,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:42:23,242 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533475159] [2021-06-05 04:42:23,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:42:23,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:42:23,447 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:42:23,448 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:42:23,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533475159] [2021-06-05 04:42:23,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533475159] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:23,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320556484] [2021-06-05 04:42:23,448 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 04:42:23,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:42:23,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:42:23,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:42:23,626 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:23,626 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:23,627 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 19 treesize of output 15 [2021-06-05 04:42:23,627 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:23,630 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:23,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:42:23,631 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:23,691 INFO L628 ElimStorePlain]: treesize reduction 88, result has 45.0 percent of original size [2021-06-05 04:42:23,693 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:23,694 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 19 treesize of output 15 [2021-06-05 04:42:23,694 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:23,716 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:42:23,718 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:23,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:42:23,720 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:42:23,741 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:42:23,744 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:23,744 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 13 treesize of output 9 [2021-06-05 04:42:23,745 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:42:23,766 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:42:23,767 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 04:42:23,767 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-06-05 04:42:23,847 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:42:23,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [320556484] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:23,847 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:42:23,847 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 04:42:23,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380176409] [2021-06-05 04:42:23,847 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 04:42:23,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:42:23,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 04:42:23,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:42:23,848 INFO L87 Difference]: Start difference. First operand 242 states and 527 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:42:24,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:42:24,532 INFO L93 Difference]: Finished difference Result 296 states and 624 transitions. [2021-06-05 04:42:24,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 04:42:24,532 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:42:24,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:42:24,533 INFO L225 Difference]: With dead ends: 296 [2021-06-05 04:42:24,533 INFO L226 Difference]: Without dead ends: 277 [2021-06-05 04:42:24,533 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 838.8ms TimeCoverageRelationStatistics Valid=161, Invalid=1171, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 04:42:24,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2021-06-05 04:42:24,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 241. [2021-06-05 04:42:24,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 2.1875) internal successors, (525), 240 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:42:24,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 525 transitions. [2021-06-05 04:42:24,535 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 525 transitions. Word has length 20 [2021-06-05 04:42:24,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:42:24,535 INFO L482 AbstractCegarLoop]: Abstraction has 241 states and 525 transitions. [2021-06-05 04:42:24,535 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:42:24,535 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 525 transitions. [2021-06-05 04:42:24,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:42:24,535 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:42:24,535 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:42:24,735 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 740 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3613 [2021-06-05 04:42:24,736 INFO L430 AbstractCegarLoop]: === Iteration 746 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:42:24,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:42:24,736 INFO L82 PathProgramCache]: Analyzing trace with hash 1238171618, now seen corresponding path program 740 times [2021-06-05 04:42:24,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:42:24,736 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815925530] [2021-06-05 04:42:24,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:42:24,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:42:24,948 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:42:24,948 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:42:24,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815925530] [2021-06-05 04:42:24,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815925530] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:24,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813299377] [2021-06-05 04:42:24,948 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 741 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 741 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:42:24,973 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:42:24,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:42:24,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 04:42:24,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:42:25,117 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:25,118 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:25,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:42:25,119 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:25,121 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:25,121 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 19 treesize of output 15 [2021-06-05 04:42:25,122 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:25,143 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:42:25,145 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:25,146 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:25,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:42:25,147 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:42:25,149 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:25,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 04:42:25,150 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:42:25,171 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:42:25,172 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 04:42:25,172 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:35 [2021-06-05 04:42:25,253 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 04:42:25,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1813299377] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:25,253 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:42:25,253 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 04:42:25,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915611036] [2021-06-05 04:42:25,253 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 04:42:25,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:42:25,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 04:42:25,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:42:25,254 INFO L87 Difference]: Start difference. First operand 241 states and 525 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:42:25,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:42:25,949 INFO L93 Difference]: Finished difference Result 283 states and 610 transitions. [2021-06-05 04:42:25,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 04:42:25,949 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:42:25,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:42:25,949 INFO L225 Difference]: With dead ends: 283 [2021-06-05 04:42:25,949 INFO L226 Difference]: Without dead ends: 274 [2021-06-05 04:42:25,950 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 811.0ms TimeCoverageRelationStatistics Valid=140, Invalid=1192, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 04:42:25,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2021-06-05 04:42:25,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 240. [2021-06-05 04:42:25,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 239 states have (on average 2.188284518828452) internal successors, (523), 239 states have internal predecessors, (523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:42:25,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 523 transitions. [2021-06-05 04:42:25,951 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 523 transitions. Word has length 20 [2021-06-05 04:42:25,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:42:25,951 INFO L482 AbstractCegarLoop]: Abstraction has 240 states and 523 transitions. [2021-06-05 04:42:25,952 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:42:25,952 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 523 transitions. [2021-06-05 04:42:25,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:42:25,952 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:42:25,952 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:42:26,152 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3618,741 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:42:26,152 INFO L430 AbstractCegarLoop]: === Iteration 747 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:42:26,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:42:26,152 INFO L82 PathProgramCache]: Analyzing trace with hash -1629968974, now seen corresponding path program 741 times [2021-06-05 04:42:26,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:42:26,153 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443427745] [2021-06-05 04:42:26,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:42:26,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:42:26,320 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 04:42:26,320 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:42:26,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443427745] [2021-06-05 04:42:26,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443427745] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:26,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020255343] [2021-06-05 04:42:26,320 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 742 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 742 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:42:26,346 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:42:26,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:42:26,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:42:26,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:42:26,512 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:26,512 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:26,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 04:42:26,513 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:26,515 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:26,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 04:42:26,516 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:26,538 INFO L628 ElimStorePlain]: treesize reduction 42, result has 39.1 percent of original size [2021-06-05 04:42:26,539 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:26,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:42:26,541 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:42:26,548 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:42:26,548 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 04:42:26,548 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-06-05 04:42:26,589 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 04:42:26,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2020255343] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:26,589 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:42:26,589 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 04:42:26,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547872646] [2021-06-05 04:42:26,589 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 04:42:26,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:42:26,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 04:42:26,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:42:26,590 INFO L87 Difference]: Start difference. First operand 240 states and 523 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:42:26,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:42:26,881 INFO L93 Difference]: Finished difference Result 270 states and 578 transitions. [2021-06-05 04:42:26,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 04:42:26,881 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:42:26,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:42:26,882 INFO L225 Difference]: With dead ends: 270 [2021-06-05 04:42:26,882 INFO L226 Difference]: Without dead ends: 257 [2021-06-05 04:42:26,882 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 410.1ms TimeCoverageRelationStatistics Valid=87, Invalid=669, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:42:26,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2021-06-05 04:42:26,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 244. [2021-06-05 04:42:26,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 243 states have (on average 2.185185185185185) internal successors, (531), 243 states have internal predecessors, (531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:42:26,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 531 transitions. [2021-06-05 04:42:26,884 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 531 transitions. Word has length 20 [2021-06-05 04:42:26,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:42:26,884 INFO L482 AbstractCegarLoop]: Abstraction has 244 states and 531 transitions. [2021-06-05 04:42:26,884 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:42:26,884 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 531 transitions. [2021-06-05 04:42:26,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:42:26,884 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:42:26,884 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:42:27,088 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3621,742 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:42:27,089 INFO L430 AbstractCegarLoop]: === Iteration 748 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:42:27,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:42:27,089 INFO L82 PathProgramCache]: Analyzing trace with hash -493783702, now seen corresponding path program 742 times [2021-06-05 04:42:27,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:42:27,089 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972311920] [2021-06-05 04:42:27,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:42:27,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:42:27,299 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 04:42:27,299 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:42:27,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972311920] [2021-06-05 04:42:27,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972311920] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:27,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227619661] [2021-06-05 04:42:27,300 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 743 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 743 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:42:27,325 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:42:27,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:42:27,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:42:27,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:42:27,463 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:27,463 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:27,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:42:27,465 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:27,467 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:27,467 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:27,468 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 19 treesize of output 15 [2021-06-05 04:42:27,468 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:27,471 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:27,471 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:27,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:42:27,472 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:27,474 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:27,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:42:27,475 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:27,529 INFO L628 ElimStorePlain]: treesize reduction 80, result has 44.4 percent of original size [2021-06-05 04:42:27,531 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:27,531 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:27,531 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 10 treesize of output 6 [2021-06-05 04:42:27,533 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:42:27,535 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:27,535 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 10 treesize of output 6 [2021-06-05 04:42:27,536 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:42:27,558 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:42:27,559 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 04:42:27,559 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:173, output treesize:38 [2021-06-05 04:42:27,639 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:42:27,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1227619661] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:27,640 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:42:27,640 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 04:42:27,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257362124] [2021-06-05 04:42:27,640 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 04:42:27,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:42:27,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 04:42:27,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:42:27,640 INFO L87 Difference]: Start difference. First operand 244 states and 531 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:42:27,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:42:27,982 INFO L93 Difference]: Finished difference Result 270 states and 576 transitions. [2021-06-05 04:42:27,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:42:27,982 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:42:27,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:42:27,982 INFO L225 Difference]: With dead ends: 270 [2021-06-05 04:42:27,982 INFO L226 Difference]: Without dead ends: 258 [2021-06-05 04:42:27,982 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 463.7ms TimeCoverageRelationStatistics Valid=91, Invalid=665, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:42:27,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2021-06-05 04:42:27,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 243. [2021-06-05 04:42:27,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 242 states have (on average 2.1859504132231407) internal successors, (529), 242 states have internal predecessors, (529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:42:27,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 529 transitions. [2021-06-05 04:42:27,984 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 529 transitions. Word has length 20 [2021-06-05 04:42:27,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:42:27,984 INFO L482 AbstractCegarLoop]: Abstraction has 243 states and 529 transitions. [2021-06-05 04:42:27,984 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:42:27,984 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 529 transitions. [2021-06-05 04:42:27,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:42:27,985 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:42:27,985 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:42:28,185 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3622,743 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:42:28,185 INFO L430 AbstractCegarLoop]: === Iteration 749 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:42:28,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:42:28,185 INFO L82 PathProgramCache]: Analyzing trace with hash 1655012834, now seen corresponding path program 743 times [2021-06-05 04:42:28,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:42:28,185 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863225520] [2021-06-05 04:42:28,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:42:28,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:42:28,406 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 04:42:28,406 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:42:28,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863225520] [2021-06-05 04:42:28,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863225520] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:28,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609116860] [2021-06-05 04:42:28,406 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 744 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 744 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:42:28,434 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:42:28,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:42:28,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:42:28,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:42:28,597 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:28,598 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:28,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:42:28,599 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:28,601 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:28,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:42:28,602 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:28,662 INFO L628 ElimStorePlain]: treesize reduction 95, result has 40.6 percent of original size [2021-06-05 04:42:28,663 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 04:42:28,665 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:28,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:42:28,666 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:28,687 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:42:28,690 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:28,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:42:28,691 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:42:28,713 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:42:28,714 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:42:28,714 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:173, output treesize:36 [2021-06-05 04:42:28,796 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:42:28,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1609116860] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:28,797 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:42:28,797 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 04:42:28,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578936787] [2021-06-05 04:42:28,797 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 04:42:28,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:42:28,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 04:42:28,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:42:28,797 INFO L87 Difference]: Start difference. First operand 243 states and 529 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:42:29,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:42:29,305 INFO L93 Difference]: Finished difference Result 302 states and 636 transitions. [2021-06-05 04:42:29,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 04:42:29,306 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:42:29,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:42:29,306 INFO L225 Difference]: With dead ends: 302 [2021-06-05 04:42:29,306 INFO L226 Difference]: Without dead ends: 283 [2021-06-05 04:42:29,306 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 679.1ms TimeCoverageRelationStatistics Valid=117, Invalid=875, Unknown=0, NotChecked=0, Total=992 [2021-06-05 04:42:29,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2021-06-05 04:42:29,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 242. [2021-06-05 04:42:29,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 241 states have (on average 2.1867219917012446) internal successors, (527), 241 states have internal predecessors, (527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:42:29,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 527 transitions. [2021-06-05 04:42:29,308 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 527 transitions. Word has length 20 [2021-06-05 04:42:29,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:42:29,308 INFO L482 AbstractCegarLoop]: Abstraction has 242 states and 527 transitions. [2021-06-05 04:42:29,308 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:42:29,308 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 527 transitions. [2021-06-05 04:42:29,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:42:29,308 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:42:29,308 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:42:29,509 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3625,744 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:42:29,509 INFO L430 AbstractCegarLoop]: === Iteration 750 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:42:29,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:42:29,509 INFO L82 PathProgramCache]: Analyzing trace with hash -451771286, now seen corresponding path program 744 times [2021-06-05 04:42:29,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:42:29,509 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477295677] [2021-06-05 04:42:29,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:42:29,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:42:29,734 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 04:42:29,734 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:42:29,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477295677] [2021-06-05 04:42:29,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477295677] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:29,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701708311] [2021-06-05 04:42:29,734 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 745 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 745 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:42:29,760 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:42:29,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:42:29,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:42:29,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:42:29,955 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:29,955 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:29,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:42:29,956 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:29,959 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:29,959 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 19 treesize of output 15 [2021-06-05 04:42:29,960 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:30,021 INFO L628 ElimStorePlain]: treesize reduction 88, result has 46.0 percent of original size [2021-06-05 04:42:30,023 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:30,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 04:42:30,025 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:42:30,048 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:42:30,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:30,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:42:30,051 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:30,073 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:42:30,075 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:30,075 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 10 treesize of output 6 [2021-06-05 04:42:30,077 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:42:30,097 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:42:30,098 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 04:42:30,098 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-06-05 04:42:30,182 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 04:42:30,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [701708311] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:30,182 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:42:30,182 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 04:42:30,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769844960] [2021-06-05 04:42:30,183 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 04:42:30,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:42:30,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 04:42:30,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:42:30,183 INFO L87 Difference]: Start difference. First operand 242 states and 527 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:42:30,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:42:30,830 INFO L93 Difference]: Finished difference Result 302 states and 636 transitions. [2021-06-05 04:42:30,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 04:42:30,831 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:42:30,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:42:30,831 INFO L225 Difference]: With dead ends: 302 [2021-06-05 04:42:30,831 INFO L226 Difference]: Without dead ends: 283 [2021-06-05 04:42:30,831 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 781.9ms TimeCoverageRelationStatistics Valid=129, Invalid=1061, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 04:42:30,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2021-06-05 04:42:30,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 242. [2021-06-05 04:42:30,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 241 states have (on average 2.1867219917012446) internal successors, (527), 241 states have internal predecessors, (527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:42:30,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 527 transitions. [2021-06-05 04:42:30,833 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 527 transitions. Word has length 20 [2021-06-05 04:42:30,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:42:30,833 INFO L482 AbstractCegarLoop]: Abstraction has 242 states and 527 transitions. [2021-06-05 04:42:30,833 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:42:30,833 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 527 transitions. [2021-06-05 04:42:30,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:42:30,833 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:42:30,833 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:42:31,034 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 745 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3630 [2021-06-05 04:42:31,034 INFO L430 AbstractCegarLoop]: === Iteration 751 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:42:31,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:42:31,034 INFO L82 PathProgramCache]: Analyzing trace with hash -1337569566, now seen corresponding path program 745 times [2021-06-05 04:42:31,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:42:31,034 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130744339] [2021-06-05 04:42:31,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:42:31,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:42:31,244 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 04:42:31,244 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:42:31,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130744339] [2021-06-05 04:42:31,244 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130744339] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:31,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468926926] [2021-06-05 04:42:31,244 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 746 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 746 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:42:31,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:42:31,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:42:31,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:42:31,497 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:31,497 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:31,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:42:31,498 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:31,506 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:31,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:42:31,508 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:31,586 INFO L628 ElimStorePlain]: treesize reduction 88, result has 45.0 percent of original size [2021-06-05 04:42:31,589 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:31,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:42:31,590 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:31,618 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:42:31,621 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:31,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:42:31,623 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:42:31,651 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:42:31,654 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:31,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 04:42:31,656 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:42:31,682 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:42:31,683 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:42:31,684 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-06-05 04:42:31,786 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 04:42:31,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1468926926] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:31,787 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:42:31,787 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 04:42:31,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844638156] [2021-06-05 04:42:31,787 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 04:42:31,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:42:31,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 04:42:31,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=491, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:42:31,788 INFO L87 Difference]: Start difference. First operand 242 states and 527 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:42:32,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:42:32,331 INFO L93 Difference]: Finished difference Result 306 states and 644 transitions. [2021-06-05 04:42:32,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 04:42:32,332 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:42:32,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:42:32,332 INFO L225 Difference]: With dead ends: 306 [2021-06-05 04:42:32,332 INFO L226 Difference]: Without dead ends: 287 [2021-06-05 04:42:32,332 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 699.7ms TimeCoverageRelationStatistics Valid=108, Invalid=884, Unknown=0, NotChecked=0, Total=992 [2021-06-05 04:42:32,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2021-06-05 04:42:32,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 242. [2021-06-05 04:42:32,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 241 states have (on average 2.1867219917012446) internal successors, (527), 241 states have internal predecessors, (527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:42:32,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 527 transitions. [2021-06-05 04:42:32,334 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 527 transitions. Word has length 20 [2021-06-05 04:42:32,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:42:32,334 INFO L482 AbstractCegarLoop]: Abstraction has 242 states and 527 transitions. [2021-06-05 04:42:32,334 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:42:32,334 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 527 transitions. [2021-06-05 04:42:32,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:42:32,335 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:42:32,335 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:42:32,535 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3635,746 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:42:32,535 INFO L430 AbstractCegarLoop]: === Iteration 752 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:42:32,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:42:32,535 INFO L82 PathProgramCache]: Analyzing trace with hash 885185066, now seen corresponding path program 746 times [2021-06-05 04:42:32,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:42:32,535 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124309950] [2021-06-05 04:42:32,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:42:32,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:42:32,731 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 04:42:32,731 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:42:32,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124309950] [2021-06-05 04:42:32,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124309950] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:32,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1692652578] [2021-06-05 04:42:32,731 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 747 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 747 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:42:32,756 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:42:32,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:42:32,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 04:42:32,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:42:32,942 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:32,943 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 27 treesize of output 21 [2021-06-05 04:42:32,943 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:32,950 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:42:32,951 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:32,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 04:42:32,952 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:32,958 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:42:32,958 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 04:42:32,958 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:38, output treesize:13 [2021-06-05 04:42:32,997 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:42:32,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1692652578] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:32,997 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:42:32,997 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 04:42:32,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552334368] [2021-06-05 04:42:32,997 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 04:42:32,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:42:32,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 04:42:32,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:42:32,997 INFO L87 Difference]: Start difference. First operand 242 states and 527 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:42:33,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:42:33,301 INFO L93 Difference]: Finished difference Result 271 states and 578 transitions. [2021-06-05 04:42:33,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:42:33,301 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:42:33,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:42:33,301 INFO L225 Difference]: With dead ends: 271 [2021-06-05 04:42:33,301 INFO L226 Difference]: Without dead ends: 264 [2021-06-05 04:42:33,302 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 454.6ms TimeCoverageRelationStatistics Valid=77, Invalid=679, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:42:33,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2021-06-05 04:42:33,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 247. [2021-06-05 04:42:33,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 2.186991869918699) internal successors, (538), 246 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:42:33,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 538 transitions. [2021-06-05 04:42:33,303 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 538 transitions. Word has length 20 [2021-06-05 04:42:33,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:42:33,304 INFO L482 AbstractCegarLoop]: Abstraction has 247 states and 538 transitions. [2021-06-05 04:42:33,304 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:42:33,304 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 538 transitions. [2021-06-05 04:42:33,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:42:33,304 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:42:33,304 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:42:33,504 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3640,747 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:42:33,504 INFO L430 AbstractCegarLoop]: === Iteration 753 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:42:33,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:42:33,504 INFO L82 PathProgramCache]: Analyzing trace with hash 1837538274, now seen corresponding path program 747 times [2021-06-05 04:42:33,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:42:33,505 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906052462] [2021-06-05 04:42:33,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:42:33,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:42:33,730 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 04:42:33,731 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:42:33,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906052462] [2021-06-05 04:42:33,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906052462] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:33,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524016817] [2021-06-05 04:42:33,731 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 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 04:42:33,757 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:42:33,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:42:33,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 04:42:33,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:42:33,926 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:33,926 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:33,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:42:33,927 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:33,929 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:33,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:42:33,930 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:33,948 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:42:33,950 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:33,950 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:33,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 04:42:33,952 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:42:33,954 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:33,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:42:33,955 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:42:33,972 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:42:33,973 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 04:42:33,973 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:71, output treesize:29 [2021-06-05 04:42:34,031 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 04:42:34,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1524016817] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:34,031 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:42:34,031 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 04:42:34,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981190523] [2021-06-05 04:42:34,031 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 04:42:34,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:42:34,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 04:42:34,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=542, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:42:34,031 INFO L87 Difference]: Start difference. First operand 247 states and 538 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:42:34,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:42:34,644 INFO L93 Difference]: Finished difference Result 291 states and 617 transitions. [2021-06-05 04:42:34,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:42:34,644 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:42:34,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:42:34,645 INFO L225 Difference]: With dead ends: 291 [2021-06-05 04:42:34,645 INFO L226 Difference]: Without dead ends: 275 [2021-06-05 04:42:34,645 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 684.2ms TimeCoverageRelationStatistics Valid=102, Invalid=1020, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 04:42:34,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2021-06-05 04:42:34,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 248. [2021-06-05 04:42:34,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 247 states have (on average 2.1862348178137654) internal successors, (540), 247 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:42:34,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 540 transitions. [2021-06-05 04:42:34,647 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 540 transitions. Word has length 20 [2021-06-05 04:42:34,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:42:34,647 INFO L482 AbstractCegarLoop]: Abstraction has 248 states and 540 transitions. [2021-06-05 04:42:34,647 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:42:34,647 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 540 transitions. [2021-06-05 04:42:34,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:42:34,647 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:42:34,647 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:42:34,847 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3641,748 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:42:34,848 INFO L430 AbstractCegarLoop]: === Iteration 754 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:42:34,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:42:34,848 INFO L82 PathProgramCache]: Analyzing trace with hash -1595423958, now seen corresponding path program 748 times [2021-06-05 04:42:34,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:42:34,848 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488336871] [2021-06-05 04:42:34,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:42:34,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:42:35,039 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 04:42:35,039 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:42:35,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488336871] [2021-06-05 04:42:35,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488336871] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:35,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557120807] [2021-06-05 04:42:35,039 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 749 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 749 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:42:35,064 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:42:35,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:42:35,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:42:35,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:42:35,265 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:35,265 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:35,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 04:42:35,267 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:35,269 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:35,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 04:42:35,270 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:35,292 INFO L628 ElimStorePlain]: treesize reduction 42, result has 44.0 percent of original size [2021-06-05 04:42:35,294 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:35,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 04:42:35,295 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:35,302 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:42:35,302 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:42:35,302 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-06-05 04:42:35,341 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:42:35,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1557120807] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:35,341 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:42:35,342 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 04:42:35,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219075585] [2021-06-05 04:42:35,342 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 04:42:35,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:42:35,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 04:42:35,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:42:35,342 INFO L87 Difference]: Start difference. First operand 248 states and 540 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:42:35,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:42:35,829 INFO L93 Difference]: Finished difference Result 290 states and 615 transitions. [2021-06-05 04:42:35,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 04:42:35,829 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:42:35,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:42:35,830 INFO L225 Difference]: With dead ends: 290 [2021-06-05 04:42:35,830 INFO L226 Difference]: Without dead ends: 277 [2021-06-05 04:42:35,830 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 588.4ms TimeCoverageRelationStatistics Valid=94, Invalid=836, Unknown=0, NotChecked=0, Total=930 [2021-06-05 04:42:35,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2021-06-05 04:42:35,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 249. [2021-06-05 04:42:35,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 248 states have (on average 2.185483870967742) internal successors, (542), 248 states have internal predecessors, (542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:42:35,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 542 transitions. [2021-06-05 04:42:35,832 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 542 transitions. Word has length 20 [2021-06-05 04:42:35,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:42:35,832 INFO L482 AbstractCegarLoop]: Abstraction has 249 states and 542 transitions. [2021-06-05 04:42:35,832 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:42:35,832 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 542 transitions. [2021-06-05 04:42:35,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:42:35,832 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:42:35,832 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:42:36,032 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3644,749 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:42:36,033 INFO L430 AbstractCegarLoop]: === Iteration 755 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:42:36,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:42:36,033 INFO L82 PathProgramCache]: Analyzing trace with hash -459238686, now seen corresponding path program 749 times [2021-06-05 04:42:36,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:42:36,033 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619204924] [2021-06-05 04:42:36,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:42:36,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:42:36,188 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 04:42:36,188 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:42:36,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619204924] [2021-06-05 04:42:36,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619204924] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:36,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [726470003] [2021-06-05 04:42:36,188 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 750 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 750 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:42:36,216 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:42:36,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:42:36,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:42:36,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:42:36,390 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:36,391 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:36,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:42:36,392 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:36,394 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:36,394 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:36,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:42:36,395 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:36,398 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:36,398 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:36,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:42:36,399 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:36,401 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:36,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:42:36,402 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:36,455 INFO L628 ElimStorePlain]: treesize reduction 83, result has 44.7 percent of original size [2021-06-05 04:42:36,457 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:36,458 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:36,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 04:42:36,459 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:42:36,461 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:36,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:42:36,463 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:42:36,485 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:42:36,486 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 04:42:36,486 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:173, output treesize:38 [2021-06-05 04:42:36,564 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 04:42:36,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [726470003] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:36,564 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:42:36,565 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 04:42:36,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177995910] [2021-06-05 04:42:36,565 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 04:42:36,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:42:36,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 04:42:36,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=491, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:42:36,565 INFO L87 Difference]: Start difference. First operand 249 states and 542 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:42:37,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:42:37,029 INFO L93 Difference]: Finished difference Result 317 states and 659 transitions. [2021-06-05 04:42:37,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 04:42:37,030 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:42:37,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:42:37,030 INFO L225 Difference]: With dead ends: 317 [2021-06-05 04:42:37,030 INFO L226 Difference]: Without dead ends: 298 [2021-06-05 04:42:37,030 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 545.4ms TimeCoverageRelationStatistics Valid=104, Invalid=888, Unknown=0, NotChecked=0, Total=992 [2021-06-05 04:42:37,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2021-06-05 04:42:37,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 245. [2021-06-05 04:42:37,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 244 states have (on average 2.1844262295081966) internal successors, (533), 244 states have internal predecessors, (533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:42:37,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 533 transitions. [2021-06-05 04:42:37,032 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 533 transitions. Word has length 20 [2021-06-05 04:42:37,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:42:37,032 INFO L482 AbstractCegarLoop]: Abstraction has 245 states and 533 transitions. [2021-06-05 04:42:37,032 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:42:37,032 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 533 transitions. [2021-06-05 04:42:37,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:42:37,033 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:42:37,033 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:42:37,233 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 750 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3645 [2021-06-05 04:42:37,233 INFO L430 AbstractCegarLoop]: === Iteration 756 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:42:37,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:42:37,233 INFO L82 PathProgramCache]: Analyzing trace with hash 951739994, now seen corresponding path program 750 times [2021-06-05 04:42:37,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:42:37,233 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44661746] [2021-06-05 04:42:37,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:42:37,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:42:37,433 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 04:42:37,433 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:42:37,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44661746] [2021-06-05 04:42:37,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44661746] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:37,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [719550046] [2021-06-05 04:42:37,433 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 04:42:37,459 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:42:37,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:42:37,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:42:37,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:42:37,639 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:37,640 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:37,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 04:42:37,641 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:37,643 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:37,643 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 27 treesize of output 21 [2021-06-05 04:42:37,644 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:37,666 INFO L628 ElimStorePlain]: treesize reduction 36, result has 42.9 percent of original size [2021-06-05 04:42:37,668 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:37,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:42:37,669 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:42:37,676 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:42:37,677 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 04:42:37,677 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-06-05 04:42:37,719 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 04:42:37,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [719550046] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:37,720 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:42:37,720 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 04:42:37,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360992563] [2021-06-05 04:42:37,720 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 04:42:37,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:42:37,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 04:42:37,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=535, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:42:37,720 INFO L87 Difference]: Start difference. First operand 245 states and 533 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:42:38,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:42:38,045 INFO L93 Difference]: Finished difference Result 270 states and 574 transitions. [2021-06-05 04:42:38,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:42:38,046 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:42:38,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:42:38,046 INFO L225 Difference]: With dead ends: 270 [2021-06-05 04:42:38,046 INFO L226 Difference]: Without dead ends: 254 [2021-06-05 04:42:38,046 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 489.0ms TimeCoverageRelationStatistics Valid=86, Invalid=726, Unknown=0, NotChecked=0, Total=812 [2021-06-05 04:42:38,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-06-05 04:42:38,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 247. [2021-06-05 04:42:38,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 2.182926829268293) internal successors, (537), 246 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:42:38,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 537 transitions. [2021-06-05 04:42:38,048 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 537 transitions. Word has length 20 [2021-06-05 04:42:38,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:42:38,048 INFO L482 AbstractCegarLoop]: Abstraction has 247 states and 537 transitions. [2021-06-05 04:42:38,048 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:42:38,048 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 537 transitions. [2021-06-05 04:42:38,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:42:38,048 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:42:38,048 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:42:38,249 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3648,751 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:42:38,249 INFO L430 AbstractCegarLoop]: === Iteration 757 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:42:38,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:42:38,249 INFO L82 PathProgramCache]: Analyzing trace with hash 1813745058, now seen corresponding path program 751 times [2021-06-05 04:42:38,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:42:38,249 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008624505] [2021-06-05 04:42:38,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:42:38,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:42:38,491 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 04:42:38,491 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:42:38,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008624505] [2021-06-05 04:42:38,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008624505] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:38,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183325129] [2021-06-05 04:42:38,491 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 752 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 752 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:42:38,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:42:38,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:42:38,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:42:38,745 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:38,746 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:38,746 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 27 treesize of output 21 [2021-06-05 04:42:38,747 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:38,749 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:38,749 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 27 treesize of output 21 [2021-06-05 04:42:38,750 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:38,772 INFO L628 ElimStorePlain]: treesize reduction 36, result has 42.9 percent of original size [2021-06-05 04:42:38,774 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:38,774 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 10 treesize of output 6 [2021-06-05 04:42:38,775 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:42:38,782 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:42:38,783 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 04:42:38,783 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-06-05 04:42:38,821 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 04:42:38,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1183325129] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:38,821 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:42:38,821 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 04:42:38,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925893689] [2021-06-05 04:42:38,822 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 04:42:38,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:42:38,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 04:42:38,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=491, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:42:38,822 INFO L87 Difference]: Start difference. First operand 247 states and 537 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:42:39,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:42:39,265 INFO L93 Difference]: Finished difference Result 280 states and 594 transitions. [2021-06-05 04:42:39,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:42:39,265 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:42:39,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:42:39,265 INFO L225 Difference]: With dead ends: 280 [2021-06-05 04:42:39,265 INFO L226 Difference]: Without dead ends: 261 [2021-06-05 04:42:39,265 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 646.0ms TimeCoverageRelationStatistics Valid=99, Invalid=831, Unknown=0, NotChecked=0, Total=930 [2021-06-05 04:42:39,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2021-06-05 04:42:39,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 248. [2021-06-05 04:42:39,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 247 states have (on average 2.182186234817814) internal successors, (539), 247 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:42:39,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 539 transitions. [2021-06-05 04:42:39,267 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 539 transitions. Word has length 20 [2021-06-05 04:42:39,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:42:39,267 INFO L482 AbstractCegarLoop]: Abstraction has 248 states and 539 transitions. [2021-06-05 04:42:39,267 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:42:39,267 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 539 transitions. [2021-06-05 04:42:39,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:42:39,268 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:42:39,268 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:42:39,468 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 752 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3649 [2021-06-05 04:42:39,468 INFO L430 AbstractCegarLoop]: === Iteration 758 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:42:39,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:42:39,468 INFO L82 PathProgramCache]: Analyzing trace with hash -1345036966, now seen corresponding path program 752 times [2021-06-05 04:42:39,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:42:39,468 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407510449] [2021-06-05 04:42:39,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:42:39,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:42:39,671 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:42:39,671 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:42:39,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407510449] [2021-06-05 04:42:39,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407510449] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:39,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909772448] [2021-06-05 04:42:39,672 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 753 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 753 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:42:39,697 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:42:39,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:42:39,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 04:42:39,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:42:39,857 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:39,858 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:39,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:42:39,858 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:39,861 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:39,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:42:39,861 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:39,884 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:42:39,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:39,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:39,887 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 10 treesize of output 6 [2021-06-05 04:42:39,888 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:42:39,890 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:39,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:42:39,891 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:42:39,912 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:42:39,913 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 04:42:39,913 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:35 [2021-06-05 04:42:39,992 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 04:42:39,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1909772448] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:39,992 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:42:39,992 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 04:42:39,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297964897] [2021-06-05 04:42:39,992 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 04:42:39,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:42:39,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 04:42:39,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=535, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:42:39,993 INFO L87 Difference]: Start difference. First operand 248 states and 539 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:42:40,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:42:40,603 INFO L93 Difference]: Finished difference Result 299 states and 629 transitions. [2021-06-05 04:42:40,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:42:40,604 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:42:40,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:42:40,604 INFO L225 Difference]: With dead ends: 299 [2021-06-05 04:42:40,604 INFO L226 Difference]: Without dead ends: 283 [2021-06-05 04:42:40,604 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 794.4ms TimeCoverageRelationStatistics Valid=124, Invalid=1066, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 04:42:40,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2021-06-05 04:42:40,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 246. [2021-06-05 04:42:40,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 245 states have (on average 2.183673469387755) internal successors, (535), 245 states have internal predecessors, (535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:42:40,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 535 transitions. [2021-06-05 04:42:40,606 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 535 transitions. Word has length 20 [2021-06-05 04:42:40,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:42:40,606 INFO L482 AbstractCegarLoop]: Abstraction has 246 states and 535 transitions. [2021-06-05 04:42:40,606 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:42:40,606 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 535 transitions. [2021-06-05 04:42:40,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:42:40,606 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:42:40,606 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:42:40,807 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 753 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3650 [2021-06-05 04:42:40,807 INFO L430 AbstractCegarLoop]: === Iteration 759 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:42:40,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:42:40,807 INFO L82 PathProgramCache]: Analyzing trace with hash -293039062, now seen corresponding path program 753 times [2021-06-05 04:42:40,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:42:40,807 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699122685] [2021-06-05 04:42:40,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:42:40,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:42:40,986 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 04:42:40,987 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:42:40,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699122685] [2021-06-05 04:42:40,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699122685] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:40,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097855561] [2021-06-05 04:42:40,987 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 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 04:42:41,013 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 04:42:41,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:42:41,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:42:41,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:42:41,179 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:41,179 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:41,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 04:42:41,180 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:41,182 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:41,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 04:42:41,183 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:41,205 INFO L628 ElimStorePlain]: treesize reduction 36, result has 47.8 percent of original size [2021-06-05 04:42:41,207 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:41,207 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 21 treesize of output 13 [2021-06-05 04:42:41,208 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:41,214 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:42:41,215 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 04:42:41,215 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-06-05 04:42:41,251 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:42:41,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2097855561] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:41,251 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:42:41,251 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 04:42:41,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880987909] [2021-06-05 04:42:41,252 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 04:42:41,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:42:41,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 04:42:41,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:42:41,252 INFO L87 Difference]: Start difference. First operand 246 states and 535 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:42:41,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:42:41,571 INFO L93 Difference]: Finished difference Result 277 states and 592 transitions. [2021-06-05 04:42:41,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 04:42:41,571 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:42:41,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:42:41,571 INFO L225 Difference]: With dead ends: 277 [2021-06-05 04:42:41,572 INFO L226 Difference]: Without dead ends: 264 [2021-06-05 04:42:41,572 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 463.9ms TimeCoverageRelationStatistics Valid=92, Invalid=720, Unknown=0, NotChecked=0, Total=812 [2021-06-05 04:42:41,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2021-06-05 04:42:41,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 248. [2021-06-05 04:42:41,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 247 states have (on average 2.182186234817814) internal successors, (539), 247 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:42:41,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 539 transitions. [2021-06-05 04:42:41,574 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 539 transitions. Word has length 20 [2021-06-05 04:42:41,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:42:41,574 INFO L482 AbstractCegarLoop]: Abstraction has 248 states and 539 transitions. [2021-06-05 04:42:41,574 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:42:41,574 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 539 transitions. [2021-06-05 04:42:41,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:42:41,574 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:42:41,574 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:42:41,774 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3653,754 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:42:41,774 INFO L430 AbstractCegarLoop]: === Iteration 760 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:42:41,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:42:41,775 INFO L82 PathProgramCache]: Analyzing trace with hash 843146210, now seen corresponding path program 754 times [2021-06-05 04:42:41,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:42:41,775 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370435272] [2021-06-05 04:42:41,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:42:41,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:42:41,975 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 04:42:41,976 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:42:41,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370435272] [2021-06-05 04:42:41,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370435272] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:41,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [374617681] [2021-06-05 04:42:41,976 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 755 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 755 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:42:42,000 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:42:42,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:42:42,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:42:42,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:42:42,140 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:42,141 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:42,141 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 19 treesize of output 15 [2021-06-05 04:42:42,141 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:42,144 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:42,144 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:42,144 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 19 treesize of output 15 [2021-06-05 04:42:42,145 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:42,148 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:42,148 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:42,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:42:42,149 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:42,151 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:42,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:42:42,152 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:42,206 INFO L628 ElimStorePlain]: treesize reduction 80, result has 45.6 percent of original size [2021-06-05 04:42:42,209 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:42,209 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:42,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 04:42:42,211 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:42:42,213 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:42,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:42:42,214 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:42:42,237 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:42:42,260 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 04:42:42,261 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:173, output treesize:38 [2021-06-05 04:42:42,338 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 04:42:42,338 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [374617681] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:42,338 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:42:42,338 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 04:42:42,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581435511] [2021-06-05 04:42:42,338 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 04:42:42,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:42:42,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 04:42:42,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:42:42,339 INFO L87 Difference]: Start difference. First operand 248 states and 539 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:42:42,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:42:42,768 INFO L93 Difference]: Finished difference Result 301 states and 630 transitions. [2021-06-05 04:42:42,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 04:42:42,768 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:42:42,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:42:42,769 INFO L225 Difference]: With dead ends: 301 [2021-06-05 04:42:42,769 INFO L226 Difference]: Without dead ends: 282 [2021-06-05 04:42:42,769 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 600.8ms TimeCoverageRelationStatistics Valid=113, Invalid=879, Unknown=0, NotChecked=0, Total=992 [2021-06-05 04:42:42,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2021-06-05 04:42:42,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 245. [2021-06-05 04:42:42,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 244 states have (on average 2.1844262295081966) internal successors, (533), 244 states have internal predecessors, (533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:42:42,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 533 transitions. [2021-06-05 04:42:42,771 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 533 transitions. Word has length 20 [2021-06-05 04:42:42,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:42:42,771 INFO L482 AbstractCegarLoop]: Abstraction has 245 states and 533 transitions. [2021-06-05 04:42:42,771 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:42:42,771 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 533 transitions. [2021-06-05 04:42:42,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:42:42,771 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:42:42,771 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:42:42,972 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3654,755 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:42:42,972 INFO L430 AbstractCegarLoop]: === Iteration 761 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:42:42,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:42:42,972 INFO L82 PathProgramCache]: Analyzing trace with hash -1303024550, now seen corresponding path program 755 times [2021-06-05 04:42:42,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:42:42,972 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860047426] [2021-06-05 04:42:42,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:42:42,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:42:43,192 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 04:42:43,193 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:42:43,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860047426] [2021-06-05 04:42:43,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860047426] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:43,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675060005] [2021-06-05 04:42:43,193 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 756 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 756 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:42:43,219 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 04:42:43,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:42:43,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:42:43,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:42:43,383 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:43,384 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:43,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:42:43,385 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:43,387 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:43,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:42:43,388 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:43,452 INFO L628 ElimStorePlain]: treesize reduction 88, result has 46.0 percent of original size [2021-06-05 04:42:43,455 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:43,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:42:43,455 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:43,477 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:42:43,480 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:43,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 04:42:43,481 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:42:43,503 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:42:43,505 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:43,506 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 10 treesize of output 6 [2021-06-05 04:42:43,507 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:42:43,527 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:42:43,529 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 04:42:43,529 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-06-05 04:42:43,609 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 04:42:43,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1675060005] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:43,609 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:42:43,609 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 04:42:43,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843280559] [2021-06-05 04:42:43,610 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 04:42:43,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:42:43,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 04:42:43,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:42:43,610 INFO L87 Difference]: Start difference. First operand 245 states and 533 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:42:44,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:42:44,179 INFO L93 Difference]: Finished difference Result 313 states and 658 transitions. [2021-06-05 04:42:44,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 04:42:44,179 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:42:44,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:42:44,179 INFO L225 Difference]: With dead ends: 313 [2021-06-05 04:42:44,179 INFO L226 Difference]: Without dead ends: 294 [2021-06-05 04:42:44,179 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 669.8ms TimeCoverageRelationStatistics Valid=120, Invalid=936, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 04:42:44,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2021-06-05 04:42:44,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 242. [2021-06-05 04:42:44,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 241 states have (on average 2.1867219917012446) internal successors, (527), 241 states have internal predecessors, (527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:42:44,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 527 transitions. [2021-06-05 04:42:44,181 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 527 transitions. Word has length 20 [2021-06-05 04:42:44,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:42:44,182 INFO L482 AbstractCegarLoop]: Abstraction has 242 states and 527 transitions. [2021-06-05 04:42:44,182 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:42:44,182 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 527 transitions. [2021-06-05 04:42:44,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:42:44,182 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:42:44,182 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:42:44,382 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3657,756 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:42:44,382 INFO L430 AbstractCegarLoop]: === Iteration 762 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:42:44,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:42:44,383 INFO L82 PathProgramCache]: Analyzing trace with hash -738202910, now seen corresponding path program 756 times [2021-06-05 04:42:44,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:42:44,383 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666503742] [2021-06-05 04:42:44,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:42:44,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:42:44,560 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 04:42:44,560 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:42:44,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666503742] [2021-06-05 04:42:44,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666503742] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:44,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128868842] [2021-06-05 04:42:44,560 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 04:42:44,591 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:42:44,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:42:44,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 04:42:44,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:42:44,743 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:44,744 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:44,744 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 19 treesize of output 15 [2021-06-05 04:42:44,745 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:44,747 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:44,747 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 19 treesize of output 15 [2021-06-05 04:42:44,748 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:44,767 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:42:44,769 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:44,769 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:44,769 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 13 treesize of output 9 [2021-06-05 04:42:44,770 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:42:44,772 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:44,772 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 13 treesize of output 9 [2021-06-05 04:42:44,774 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:42:44,791 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:42:44,791 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 04:42:44,792 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:71, output treesize:29 [2021-06-05 04:42:44,842 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 04:42:44,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1128868842] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:44,842 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:42:44,842 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 04:42:44,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342005595] [2021-06-05 04:42:44,842 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 04:42:44,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:42:44,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 04:42:44,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:42:44,843 INFO L87 Difference]: Start difference. First operand 242 states and 527 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:42:45,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:42:45,257 INFO L93 Difference]: Finished difference Result 277 states and 596 transitions. [2021-06-05 04:42:45,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:42:45,257 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:42:45,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:42:45,258 INFO L225 Difference]: With dead ends: 277 [2021-06-05 04:42:45,258 INFO L226 Difference]: Without dead ends: 270 [2021-06-05 04:42:45,258 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 486.3ms TimeCoverageRelationStatistics Valid=109, Invalid=883, Unknown=0, NotChecked=0, Total=992 [2021-06-05 04:42:45,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2021-06-05 04:42:45,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 245. [2021-06-05 04:42:45,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 244 states have (on average 2.1885245901639343) internal successors, (534), 244 states have internal predecessors, (534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:42:45,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 534 transitions. [2021-06-05 04:42:45,260 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 534 transitions. Word has length 20 [2021-06-05 04:42:45,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:42:45,260 INFO L482 AbstractCegarLoop]: Abstraction has 245 states and 534 transitions. [2021-06-05 04:42:45,260 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:42:45,260 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 534 transitions. [2021-06-05 04:42:45,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:42:45,260 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:42:45,260 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:42:45,460 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3662,757 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:42:45,461 INFO L430 AbstractCegarLoop]: === Iteration 763 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:42:45,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:42:45,461 INFO L82 PathProgramCache]: Analyzing trace with hash 123802154, now seen corresponding path program 757 times [2021-06-05 04:42:45,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:42:45,461 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224207826] [2021-06-05 04:42:45,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:42:45,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:42:45,652 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 04:42:45,652 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:42:45,653 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224207826] [2021-06-05 04:42:45,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224207826] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:45,653 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073331441] [2021-06-05 04:42:45,653 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 758 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 758 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:42:45,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:42:45,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:42:45,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:42:45,857 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:45,857 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:45,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 04:42:45,858 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:45,860 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:45,860 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 27 treesize of output 21 [2021-06-05 04:42:45,861 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:45,883 INFO L628 ElimStorePlain]: treesize reduction 36, result has 42.9 percent of original size [2021-06-05 04:42:45,885 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:45,885 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 10 treesize of output 6 [2021-06-05 04:42:45,890 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:42:45,897 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:42:45,898 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:42:45,898 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-06-05 04:42:45,939 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 04:42:45,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2073331441] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:45,939 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:42:45,939 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 04:42:45,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850234118] [2021-06-05 04:42:45,939 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 04:42:45,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:42:45,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 04:42:45,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:42:45,940 INFO L87 Difference]: Start difference. First operand 245 states and 534 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:42:46,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:42:46,434 INFO L93 Difference]: Finished difference Result 287 states and 606 transitions. [2021-06-05 04:42:46,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:42:46,434 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:42:46,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:42:46,435 INFO L225 Difference]: With dead ends: 287 [2021-06-05 04:42:46,435 INFO L226 Difference]: Without dead ends: 268 [2021-06-05 04:42:46,435 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 545.9ms TimeCoverageRelationStatistics Valid=101, Invalid=829, Unknown=0, NotChecked=0, Total=930 [2021-06-05 04:42:46,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2021-06-05 04:42:46,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 246. [2021-06-05 04:42:46,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 245 states have (on average 2.1877551020408164) internal successors, (536), 245 states have internal predecessors, (536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:42:46,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 536 transitions. [2021-06-05 04:42:46,437 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 536 transitions. Word has length 20 [2021-06-05 04:42:46,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:42:46,437 INFO L482 AbstractCegarLoop]: Abstraction has 246 states and 536 transitions. [2021-06-05 04:42:46,437 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:42:46,437 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 536 transitions. [2021-06-05 04:42:46,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:42:46,437 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:42:46,437 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:42:46,637 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3665,758 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:42:46,637 INFO L430 AbstractCegarLoop]: === Iteration 764 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:42:46,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:42:46,638 INFO L82 PathProgramCache]: Analyzing trace with hash 1259987426, now seen corresponding path program 758 times [2021-06-05 04:42:46,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:42:46,638 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219829677] [2021-06-05 04:42:46,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:42:46,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:42:46,873 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:42:46,874 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:42:46,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219829677] [2021-06-05 04:42:46,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219829677] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:46,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549475575] [2021-06-05 04:42:46,874 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 759 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 759 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:42:46,913 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:42:46,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:42:46,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 04:42:46,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:42:47,068 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:47,069 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:47,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:42:47,070 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:47,072 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:47,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:42:47,073 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:47,094 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:42:47,096 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:47,096 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:47,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:42:47,098 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:42:47,100 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:47,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 04:42:47,101 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:42:47,122 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:42:47,123 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 04:42:47,123 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:35 [2021-06-05 04:42:47,200 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:42:47,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1549475575] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:47,201 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:42:47,201 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 04:42:47,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091977289] [2021-06-05 04:42:47,201 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 04:42:47,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:42:47,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 04:42:47,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:42:47,201 INFO L87 Difference]: Start difference. First operand 246 states and 536 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:42:47,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:42:47,661 INFO L93 Difference]: Finished difference Result 306 states and 641 transitions. [2021-06-05 04:42:47,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 04:42:47,662 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:42:47,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:42:47,662 INFO L225 Difference]: With dead ends: 306 [2021-06-05 04:42:47,662 INFO L226 Difference]: Without dead ends: 290 [2021-06-05 04:42:47,662 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 676.1ms TimeCoverageRelationStatistics Valid=123, Invalid=999, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 04:42:47,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2021-06-05 04:42:47,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 244. [2021-06-05 04:42:47,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 243 states have (on average 2.185185185185185) internal successors, (531), 243 states have internal predecessors, (531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:42:47,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 531 transitions. [2021-06-05 04:42:47,664 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 531 transitions. Word has length 20 [2021-06-05 04:42:47,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:42:47,664 INFO L482 AbstractCegarLoop]: Abstraction has 244 states and 531 transitions. [2021-06-05 04:42:47,664 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:42:47,664 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 531 transitions. [2021-06-05 04:42:47,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:42:47,665 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:42:47,665 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:42:47,865 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 759 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3666 [2021-06-05 04:42:47,865 INFO L430 AbstractCegarLoop]: === Iteration 765 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:42:47,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:42:47,865 INFO L82 PathProgramCache]: Analyzing trace with hash -1982981966, now seen corresponding path program 759 times [2021-06-05 04:42:47,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:42:47,865 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27934818] [2021-06-05 04:42:47,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:42:47,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:42:48,066 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 04:42:48,066 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:42:48,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27934818] [2021-06-05 04:42:48,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27934818] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:48,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652382239] [2021-06-05 04:42:48,066 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 760 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 760 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:42:48,093 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 04:42:48,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:42:48,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:42:48,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:42:48,253 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:48,254 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:48,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 04:42:48,255 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:48,257 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:48,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 04:42:48,258 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:48,280 INFO L628 ElimStorePlain]: treesize reduction 36, result has 42.9 percent of original size [2021-06-05 04:42:48,282 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:48,282 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 10 treesize of output 6 [2021-06-05 04:42:48,283 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:42:48,290 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:42:48,291 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 04:42:48,291 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-06-05 04:42:48,330 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 04:42:48,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [652382239] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:48,331 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:42:48,331 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 04:42:48,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545561488] [2021-06-05 04:42:48,331 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 04:42:48,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:42:48,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 04:42:48,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:42:48,331 INFO L87 Difference]: Start difference. First operand 244 states and 531 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:42:48,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:42:48,665 INFO L93 Difference]: Finished difference Result 267 states and 572 transitions. [2021-06-05 04:42:48,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:42:48,666 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:42:48,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:42:48,666 INFO L225 Difference]: With dead ends: 267 [2021-06-05 04:42:48,666 INFO L226 Difference]: Without dead ends: 254 [2021-06-05 04:42:48,666 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 505.3ms TimeCoverageRelationStatistics Valid=103, Invalid=767, Unknown=0, NotChecked=0, Total=870 [2021-06-05 04:42:48,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-06-05 04:42:48,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 246. [2021-06-05 04:42:48,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 245 states have (on average 2.183673469387755) internal successors, (535), 245 states have internal predecessors, (535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:42:48,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 535 transitions. [2021-06-05 04:42:48,668 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 535 transitions. Word has length 20 [2021-06-05 04:42:48,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:42:48,668 INFO L482 AbstractCegarLoop]: Abstraction has 246 states and 535 transitions. [2021-06-05 04:42:48,668 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:42:48,668 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 535 transitions. [2021-06-05 04:42:48,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:42:48,668 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:42:48,668 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:42:48,868 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3669,760 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:42:48,869 INFO L430 AbstractCegarLoop]: === Iteration 766 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:42:48,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:42:48,869 INFO L82 PathProgramCache]: Analyzing trace with hash -846796694, now seen corresponding path program 760 times [2021-06-05 04:42:48,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:42:48,869 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926157956] [2021-06-05 04:42:48,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:42:48,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:42:49,022 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 04:42:49,022 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:42:49,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926157956] [2021-06-05 04:42:49,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926157956] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:49,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450610594] [2021-06-05 04:42:49,023 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 761 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 761 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:42:49,048 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:42:49,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:42:49,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:42:49,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:42:49,181 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:49,181 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:49,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:42:49,182 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:49,185 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:49,185 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:49,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:42:49,186 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:49,188 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:49,189 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:49,189 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 19 treesize of output 15 [2021-06-05 04:42:49,190 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:49,192 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:49,192 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 19 treesize of output 15 [2021-06-05 04:42:49,193 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:49,246 INFO L628 ElimStorePlain]: treesize reduction 83, result has 44.7 percent of original size [2021-06-05 04:42:49,248 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:49,249 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:49,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 04:42:49,250 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:42:49,252 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:49,253 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 10 treesize of output 6 [2021-06-05 04:42:49,254 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:42:49,276 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:42:49,277 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 04:42:49,277 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:173, output treesize:38 [2021-06-05 04:42:49,350 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:42:49,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1450610594] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:49,351 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:42:49,351 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 04:42:49,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280870501] [2021-06-05 04:42:49,351 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 04:42:49,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:42:49,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 04:42:49,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:42:49,351 INFO L87 Difference]: Start difference. First operand 246 states and 535 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:42:49,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:42:49,766 INFO L93 Difference]: Finished difference Result 286 states and 599 transitions. [2021-06-05 04:42:49,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:42:49,767 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:42:49,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:42:49,767 INFO L225 Difference]: With dead ends: 286 [2021-06-05 04:42:49,767 INFO L226 Difference]: Without dead ends: 267 [2021-06-05 04:42:49,767 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 510.6ms TimeCoverageRelationStatistics Valid=124, Invalid=868, Unknown=0, NotChecked=0, Total=992 [2021-06-05 04:42:49,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2021-06-05 04:42:49,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 245. [2021-06-05 04:42:49,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 244 states have (on average 2.1844262295081966) internal successors, (533), 244 states have internal predecessors, (533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:42:49,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 533 transitions. [2021-06-05 04:42:49,769 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 533 transitions. Word has length 20 [2021-06-05 04:42:49,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:42:49,769 INFO L482 AbstractCegarLoop]: Abstraction has 245 states and 533 transitions. [2021-06-05 04:42:49,769 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:42:49,769 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 533 transitions. [2021-06-05 04:42:49,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:42:49,770 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:42:49,770 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:42:49,970 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 761 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3670 [2021-06-05 04:42:49,970 INFO L430 AbstractCegarLoop]: === Iteration 767 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:42:49,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:42:49,970 INFO L82 PathProgramCache]: Analyzing trace with hash 1301999842, now seen corresponding path program 761 times [2021-06-05 04:42:49,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:42:49,970 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195069559] [2021-06-05 04:42:49,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:42:49,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:42:50,195 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 04:42:50,195 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:42:50,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195069559] [2021-06-05 04:42:50,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195069559] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:50,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567769253] [2021-06-05 04:42:50,195 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 762 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 762 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:42:50,221 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 04:42:50,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:42:50,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:42:50,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:42:50,377 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:50,378 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:50,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:42:50,379 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:50,381 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:50,382 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 19 treesize of output 15 [2021-06-05 04:42:50,382 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:50,444 INFO L628 ElimStorePlain]: treesize reduction 85, result has 45.9 percent of original size [2021-06-05 04:42:50,447 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:50,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:42:50,448 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:42:50,472 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:42:50,474 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:50,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:42:50,475 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:50,497 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:42:50,499 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:50,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 04:42:50,501 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:42:50,521 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:42:50,522 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 04:42:50,522 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-06-05 04:42:50,605 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:42:50,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [567769253] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:50,605 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:42:50,605 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 04:42:50,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136289551] [2021-06-05 04:42:50,605 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 04:42:50,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:42:50,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 04:42:50,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:42:50,605 INFO L87 Difference]: Start difference. First operand 245 states and 533 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:42:51,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:42:51,159 INFO L93 Difference]: Finished difference Result 306 states and 640 transitions. [2021-06-05 04:42:51,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 04:42:51,159 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:42:51,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:42:51,159 INFO L225 Difference]: With dead ends: 306 [2021-06-05 04:42:51,159 INFO L226 Difference]: Without dead ends: 284 [2021-06-05 04:42:51,159 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 681.1ms TimeCoverageRelationStatistics Valid=123, Invalid=869, Unknown=0, NotChecked=0, Total=992 [2021-06-05 04:42:51,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2021-06-05 04:42:51,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 242. [2021-06-05 04:42:51,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 241 states have (on average 2.1867219917012446) internal successors, (527), 241 states have internal predecessors, (527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:42:51,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 527 transitions. [2021-06-05 04:42:51,161 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 527 transitions. Word has length 20 [2021-06-05 04:42:51,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:42:51,161 INFO L482 AbstractCegarLoop]: Abstraction has 242 states and 527 transitions. [2021-06-05 04:42:51,161 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:42:51,161 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 527 transitions. [2021-06-05 04:42:51,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:42:51,162 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:42:51,162 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:42:51,362 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3673,762 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:42:51,362 INFO L430 AbstractCegarLoop]: === Iteration 768 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:42:51,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:42:51,362 INFO L82 PathProgramCache]: Analyzing trace with hash 1426187050, now seen corresponding path program 762 times [2021-06-05 04:42:51,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:42:51,362 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147675196] [2021-06-05 04:42:51,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:42:51,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:42:51,571 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:42:51,571 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:42:51,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147675196] [2021-06-05 04:42:51,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147675196] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:51,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39400259] [2021-06-05 04:42:51,572 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 763 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 763 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:42:51,602 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 04:42:51,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:42:51,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:42:51,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:42:51,759 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:51,759 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:51,760 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 27 treesize of output 21 [2021-06-05 04:42:51,761 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:51,762 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:51,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 04:42:51,763 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:51,785 INFO L628 ElimStorePlain]: treesize reduction 42, result has 39.1 percent of original size [2021-06-05 04:42:51,787 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:51,787 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 10 treesize of output 6 [2021-06-05 04:42:51,788 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:42:51,795 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:42:51,795 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 04:42:51,796 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-06-05 04:42:51,834 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:42:51,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [39400259] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:51,834 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:42:51,834 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 04:42:51,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172056513] [2021-06-05 04:42:51,834 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 04:42:51,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:42:51,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 04:42:51,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:42:51,835 INFO L87 Difference]: Start difference. First operand 242 states and 527 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:42:52,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:42:52,130 INFO L93 Difference]: Finished difference Result 266 states and 567 transitions. [2021-06-05 04:42:52,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:42:52,130 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:42:52,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:42:52,130 INFO L225 Difference]: With dead ends: 266 [2021-06-05 04:42:52,130 INFO L226 Difference]: Without dead ends: 253 [2021-06-05 04:42:52,130 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 445.0ms TimeCoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:42:52,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2021-06-05 04:42:52,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 245. [2021-06-05 04:42:52,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 244 states have (on average 2.1844262295081966) internal successors, (533), 244 states have internal predecessors, (533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:42:52,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 533 transitions. [2021-06-05 04:42:52,132 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 533 transitions. Word has length 20 [2021-06-05 04:42:52,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:42:52,132 INFO L482 AbstractCegarLoop]: Abstraction has 245 states and 533 transitions. [2021-06-05 04:42:52,132 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:42:52,132 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 533 transitions. [2021-06-05 04:42:52,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:42:52,133 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:42:52,133 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:42:52,333 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3678,763 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:42:52,333 INFO L430 AbstractCegarLoop]: === Iteration 769 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:42:52,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:42:52,333 INFO L82 PathProgramCache]: Analyzing trace with hash -1732594974, now seen corresponding path program 763 times [2021-06-05 04:42:52,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:42:52,333 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156532870] [2021-06-05 04:42:52,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:42:52,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:42:52,562 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:42:52,563 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:42:52,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156532870] [2021-06-05 04:42:52,563 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156532870] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:52,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954004081] [2021-06-05 04:42:52,563 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 764 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 764 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:42:52,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:42:52,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:42:52,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:42:52,726 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:52,726 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:52,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:42:52,728 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:52,731 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:52,732 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:52,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:42:52,732 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:52,735 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:52,735 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:52,736 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 19 treesize of output 15 [2021-06-05 04:42:52,736 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:52,739 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:52,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:42:52,739 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:52,795 INFO L628 ElimStorePlain]: treesize reduction 87, result has 39.6 percent of original size [2021-06-05 04:42:52,797 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:52,797 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 10 treesize of output 6 [2021-06-05 04:42:52,799 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:42:52,821 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:42:52,822 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 04:42:52,822 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:173, output treesize:36 [2021-06-05 04:42:52,898 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:42:52,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [954004081] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:52,898 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:42:52,898 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 04:42:52,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483408425] [2021-06-05 04:42:52,898 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 04:42:52,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:42:52,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 04:42:52,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:42:52,899 INFO L87 Difference]: Start difference. First operand 245 states and 533 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:42:53,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:42:53,343 INFO L93 Difference]: Finished difference Result 299 states and 623 transitions. [2021-06-05 04:42:53,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 04:42:53,343 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:42:53,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:42:53,343 INFO L225 Difference]: With dead ends: 299 [2021-06-05 04:42:53,343 INFO L226 Difference]: Without dead ends: 277 [2021-06-05 04:42:53,343 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 615.9ms TimeCoverageRelationStatistics Valid=115, Invalid=815, Unknown=0, NotChecked=0, Total=930 [2021-06-05 04:42:53,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2021-06-05 04:42:53,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 242. [2021-06-05 04:42:53,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 241 states have (on average 2.1867219917012446) internal successors, (527), 241 states have internal predecessors, (527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:42:53,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 527 transitions. [2021-06-05 04:42:53,345 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 527 transitions. Word has length 20 [2021-06-05 04:42:53,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:42:53,345 INFO L482 AbstractCegarLoop]: Abstraction has 242 states and 527 transitions. [2021-06-05 04:42:53,346 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:42:53,346 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 527 transitions. [2021-06-05 04:42:53,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:42:53,346 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:42:53,346 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:42:53,546 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 764 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3679 [2021-06-05 04:42:53,546 INFO L430 AbstractCegarLoop]: === Iteration 770 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:42:53,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:42:53,546 INFO L82 PathProgramCache]: Analyzing trace with hash 416201562, now seen corresponding path program 764 times [2021-06-05 04:42:53,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:42:53,547 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945496809] [2021-06-05 04:42:53,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:42:53,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:42:53,758 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:42:53,758 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:42:53,758 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945496809] [2021-06-05 04:42:53,758 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945496809] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:53,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461684380] [2021-06-05 04:42:53,759 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 765 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 765 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:42:53,784 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:42:53,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:42:53,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 04:42:53,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:42:53,916 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:53,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:53,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:42:53,917 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:53,919 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:53,920 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 19 treesize of output 15 [2021-06-05 04:42:53,920 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:53,941 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:42:53,943 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:53,943 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:53,944 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 13 treesize of output 9 [2021-06-05 04:42:53,945 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:42:53,947 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:53,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:42:53,948 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:42:53,968 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:42:53,969 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 04:42:53,969 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:35 [2021-06-05 04:42:54,046 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 04:42:54,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [461684380] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:54,047 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:42:54,047 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 04:42:54,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826955103] [2021-06-05 04:42:54,047 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 04:42:54,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:42:54,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 04:42:54,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:42:54,047 INFO L87 Difference]: Start difference. First operand 242 states and 527 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:42:54,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:42:54,743 INFO L93 Difference]: Finished difference Result 283 states and 611 transitions. [2021-06-05 04:42:54,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 04:42:54,743 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:42:54,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:42:54,744 INFO L225 Difference]: With dead ends: 283 [2021-06-05 04:42:54,744 INFO L226 Difference]: Without dead ends: 274 [2021-06-05 04:42:54,744 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 788.4ms TimeCoverageRelationStatistics Valid=149, Invalid=1183, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 04:42:54,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2021-06-05 04:42:54,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 242. [2021-06-05 04:42:54,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 241 states have (on average 2.1867219917012446) internal successors, (527), 241 states have internal predecessors, (527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:42:54,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 527 transitions. [2021-06-05 04:42:54,746 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 527 transitions. Word has length 20 [2021-06-05 04:42:54,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:42:54,746 INFO L482 AbstractCegarLoop]: Abstraction has 242 states and 527 transitions. [2021-06-05 04:42:54,746 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:42:54,746 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 527 transitions. [2021-06-05 04:42:54,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:42:54,746 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:42:54,746 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:42:54,946 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 765 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3682 [2021-06-05 04:42:54,947 INFO L430 AbstractCegarLoop]: === Iteration 771 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:42:54,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:42:54,947 INFO L82 PathProgramCache]: Analyzing trace with hash -1690582558, now seen corresponding path program 765 times [2021-06-05 04:42:54,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:42:54,947 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335778501] [2021-06-05 04:42:54,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:42:54,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:42:55,177 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:42:55,177 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:42:55,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335778501] [2021-06-05 04:42:55,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335778501] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:55,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117937035] [2021-06-05 04:42:55,178 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 766 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 766 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:42:55,204 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 04:42:55,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:42:55,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:42:55,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:42:55,403 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:55,404 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:55,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:42:55,405 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:55,407 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:55,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:42:55,408 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:55,470 INFO L628 ElimStorePlain]: treesize reduction 88, result has 45.0 percent of original size [2021-06-05 04:42:55,472 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:55,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:42:55,473 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:55,495 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:42:55,497 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:55,498 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 10 treesize of output 6 [2021-06-05 04:42:55,499 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:42:55,521 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:42:55,523 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:55,523 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 10 treesize of output 6 [2021-06-05 04:42:55,525 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:42:55,545 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:42:55,546 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 04:42:55,546 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-06-05 04:42:55,630 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 04:42:55,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [117937035] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:55,630 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:42:55,630 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 04:42:55,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540656296] [2021-06-05 04:42:55,630 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 04:42:55,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:42:55,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 04:42:55,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:42:55,630 INFO L87 Difference]: Start difference. First operand 242 states and 527 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:42:56,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:42:56,277 INFO L93 Difference]: Finished difference Result 315 states and 662 transitions. [2021-06-05 04:42:56,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 04:42:56,278 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:42:56,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:42:56,278 INFO L225 Difference]: With dead ends: 315 [2021-06-05 04:42:56,278 INFO L226 Difference]: Without dead ends: 296 [2021-06-05 04:42:56,278 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 751.6ms TimeCoverageRelationStatistics Valid=127, Invalid=995, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 04:42:56,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2021-06-05 04:42:56,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 242. [2021-06-05 04:42:56,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 241 states have (on average 2.1867219917012446) internal successors, (527), 241 states have internal predecessors, (527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:42:56,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 527 transitions. [2021-06-05 04:42:56,280 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 527 transitions. Word has length 20 [2021-06-05 04:42:56,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:42:56,280 INFO L482 AbstractCegarLoop]: Abstraction has 242 states and 527 transitions. [2021-06-05 04:42:56,280 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:42:56,280 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 527 transitions. [2021-06-05 04:42:56,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:42:56,281 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:42:56,281 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:42:56,481 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3685,766 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:42:56,481 INFO L430 AbstractCegarLoop]: === Iteration 772 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:42:56,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:42:56,481 INFO L82 PathProgramCache]: Analyzing trace with hash -1586825382, now seen corresponding path program 766 times [2021-06-05 04:42:56,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:42:56,481 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722935351] [2021-06-05 04:42:56,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:42:56,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:42:56,643 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:42:56,643 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:42:56,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722935351] [2021-06-05 04:42:56,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722935351] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:56,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293160459] [2021-06-05 04:42:56,644 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 767 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 767 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:42:56,668 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:42:56,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:42:56,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:42:56,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:42:56,844 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:56,845 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:56,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 04:42:56,846 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:56,848 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:56,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 04:42:56,849 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:56,870 INFO L628 ElimStorePlain]: treesize reduction 42, result has 39.1 percent of original size [2021-06-05 04:42:56,872 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:56,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:42:56,874 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:42:56,880 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:42:56,881 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 04:42:56,881 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-06-05 04:42:56,922 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 04:42:56,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1293160459] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:56,922 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:42:56,923 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 04:42:56,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899510934] [2021-06-05 04:42:56,923 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 04:42:56,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:42:56,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 04:42:56,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:42:56,923 INFO L87 Difference]: Start difference. First operand 242 states and 527 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:42:57,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:42:57,214 INFO L93 Difference]: Finished difference Result 268 states and 570 transitions. [2021-06-05 04:42:57,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:42:57,214 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:42:57,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:42:57,214 INFO L225 Difference]: With dead ends: 268 [2021-06-05 04:42:57,214 INFO L226 Difference]: Without dead ends: 252 [2021-06-05 04:42:57,214 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 404.4ms TimeCoverageRelationStatistics Valid=83, Invalid=673, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:42:57,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2021-06-05 04:42:57,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 246. [2021-06-05 04:42:57,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 245 states have (on average 2.183673469387755) internal successors, (535), 245 states have internal predecessors, (535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:42:57,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 535 transitions. [2021-06-05 04:42:57,216 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 535 transitions. Word has length 20 [2021-06-05 04:42:57,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:42:57,216 INFO L482 AbstractCegarLoop]: Abstraction has 246 states and 535 transitions. [2021-06-05 04:42:57,216 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:42:57,216 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 535 transitions. [2021-06-05 04:42:57,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:42:57,217 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:42:57,217 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:42:57,417 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 767 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3690 [2021-06-05 04:42:57,417 INFO L430 AbstractCegarLoop]: === Iteration 773 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:42:57,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:42:57,417 INFO L82 PathProgramCache]: Analyzing trace with hash -724820318, now seen corresponding path program 767 times [2021-06-05 04:42:57,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:42:57,418 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119125865] [2021-06-05 04:42:57,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:42:57,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:42:57,609 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 04:42:57,610 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:42:57,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119125865] [2021-06-05 04:42:57,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119125865] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:57,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77479558] [2021-06-05 04:42:57,610 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 768 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 768 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:42:57,636 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 04:42:57,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:42:57,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:42:57,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:42:57,815 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:57,816 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:57,816 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 27 treesize of output 21 [2021-06-05 04:42:57,817 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:57,819 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:57,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 04:42:57,820 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:57,842 INFO L628 ElimStorePlain]: treesize reduction 36, result has 42.9 percent of original size [2021-06-05 04:42:57,843 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:57,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:42:57,845 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:42:57,852 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:42:57,852 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 04:42:57,852 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-06-05 04:42:57,894 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 04:42:57,894 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [77479558] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:57,894 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:42:57,894 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 04:42:57,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237351939] [2021-06-05 04:42:57,894 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 04:42:57,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:42:57,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 04:42:57,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:42:57,895 INFO L87 Difference]: Start difference. First operand 246 states and 535 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:42:58,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:42:58,322 INFO L93 Difference]: Finished difference Result 273 states and 584 transitions. [2021-06-05 04:42:58,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 04:42:58,323 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:42:58,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:42:58,323 INFO L225 Difference]: With dead ends: 273 [2021-06-05 04:42:58,323 INFO L226 Difference]: Without dead ends: 260 [2021-06-05 04:42:58,323 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 579.6ms TimeCoverageRelationStatistics Valid=100, Invalid=830, Unknown=0, NotChecked=0, Total=930 [2021-06-05 04:42:58,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2021-06-05 04:42:58,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 247. [2021-06-05 04:42:58,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 2.182926829268293) internal successors, (537), 246 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:42:58,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 537 transitions. [2021-06-05 04:42:58,325 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 537 transitions. Word has length 20 [2021-06-05 04:42:58,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:42:58,325 INFO L482 AbstractCegarLoop]: Abstraction has 247 states and 537 transitions. [2021-06-05 04:42:58,325 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:42:58,325 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 537 transitions. [2021-06-05 04:42:58,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:42:58,326 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:42:58,326 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:42:58,526 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3691,768 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:42:58,526 INFO L430 AbstractCegarLoop]: === Iteration 774 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:42:58,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:42:58,526 INFO L82 PathProgramCache]: Analyzing trace with hash 411364954, now seen corresponding path program 768 times [2021-06-05 04:42:58,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:42:58,526 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700350609] [2021-06-05 04:42:58,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:42:58,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:42:58,763 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:42:58,764 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:42:58,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700350609] [2021-06-05 04:42:58,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700350609] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:58,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1144506526] [2021-06-05 04:42:58,764 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 769 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 769 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:42:58,791 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 04:42:58,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:42:58,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 04:42:58,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:42:58,941 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:58,941 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:58,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:42:58,942 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:58,945 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:58,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:42:58,945 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:58,967 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:42:58,969 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:58,969 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:58,969 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 13 treesize of output 9 [2021-06-05 04:42:58,971 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:42:58,973 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:58,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:42:58,974 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:42:58,995 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:42:58,996 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 04:42:58,996 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:35 [2021-06-05 04:42:59,072 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:42:59,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1144506526] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:59,073 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:42:59,073 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 04:42:59,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478397672] [2021-06-05 04:42:59,073 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 04:42:59,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:42:59,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 04:42:59,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:42:59,073 INFO L87 Difference]: Start difference. First operand 247 states and 537 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:42:59,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:42:59,444 INFO L93 Difference]: Finished difference Result 273 states and 587 transitions. [2021-06-05 04:42:59,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 04:42:59,444 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:42:59,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:42:59,444 INFO L225 Difference]: With dead ends: 273 [2021-06-05 04:42:59,445 INFO L226 Difference]: Without dead ends: 266 [2021-06-05 04:42:59,445 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 600.6ms TimeCoverageRelationStatistics Valid=104, Invalid=826, Unknown=0, NotChecked=0, Total=930 [2021-06-05 04:42:59,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2021-06-05 04:42:59,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 245. [2021-06-05 04:42:59,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 244 states have (on average 2.1844262295081966) internal successors, (533), 244 states have internal predecessors, (533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:42:59,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 533 transitions. [2021-06-05 04:42:59,446 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 533 transitions. Word has length 20 [2021-06-05 04:42:59,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:42:59,447 INFO L482 AbstractCegarLoop]: Abstraction has 245 states and 533 transitions. [2021-06-05 04:42:59,447 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:42:59,447 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 533 transitions. [2021-06-05 04:42:59,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:42:59,447 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:42:59,447 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:42:59,647 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 769 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3692 [2021-06-05 04:42:59,647 INFO L430 AbstractCegarLoop]: === Iteration 775 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:42:59,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:42:59,647 INFO L82 PathProgramCache]: Analyzing trace with hash 1463362858, now seen corresponding path program 769 times [2021-06-05 04:42:59,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:42:59,648 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455152615] [2021-06-05 04:42:59,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:42:59,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:42:59,812 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 04:42:59,813 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:42:59,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455152615] [2021-06-05 04:42:59,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455152615] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:59,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044666951] [2021-06-05 04:42:59,813 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 770 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 770 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:42:59,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:42:59,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:42:59,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:42:59,993 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:59,994 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:59,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 04:42:59,995 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:59,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:42:59,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 04:42:59,998 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:43:00,020 INFO L628 ElimStorePlain]: treesize reduction 36, result has 42.9 percent of original size [2021-06-05 04:43:00,022 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:00,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:43:00,023 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:43:00,030 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:43:00,031 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 04:43:00,031 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-06-05 04:43:00,065 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 04:43:00,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2044666951] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:00,065 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:43:00,065 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 04:43:00,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32589897] [2021-06-05 04:43:00,065 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 04:43:00,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:43:00,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 04:43:00,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:43:00,065 INFO L87 Difference]: Start difference. First operand 245 states and 533 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:43:00,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:43:00,350 INFO L93 Difference]: Finished difference Result 272 states and 575 transitions. [2021-06-05 04:43:00,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:43:00,351 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:43:00,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:43:00,351 INFO L225 Difference]: With dead ends: 272 [2021-06-05 04:43:00,351 INFO L226 Difference]: Without dead ends: 253 [2021-06-05 04:43:00,351 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 420.1ms TimeCoverageRelationStatistics Valid=94, Invalid=662, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:43:00,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2021-06-05 04:43:00,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 246. [2021-06-05 04:43:00,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 245 states have (on average 2.183673469387755) internal successors, (535), 245 states have internal predecessors, (535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:43:00,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 535 transitions. [2021-06-05 04:43:00,353 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 535 transitions. Word has length 20 [2021-06-05 04:43:00,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:43:00,353 INFO L482 AbstractCegarLoop]: Abstraction has 246 states and 535 transitions. [2021-06-05 04:43:00,353 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:43:00,353 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 535 transitions. [2021-06-05 04:43:00,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:43:00,353 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:43:00,353 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:43:00,553 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3695,770 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:43:00,554 INFO L430 AbstractCegarLoop]: === Iteration 776 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:43:00,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:43:00,554 INFO L82 PathProgramCache]: Analyzing trace with hash -1695419166, now seen corresponding path program 770 times [2021-06-05 04:43:00,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:43:00,554 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086408505] [2021-06-05 04:43:00,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:43:00,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:43:00,767 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 04:43:00,767 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:43:00,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086408505] [2021-06-05 04:43:00,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086408505] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:00,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071370745] [2021-06-05 04:43:00,768 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 771 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 771 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:43:00,793 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:43:00,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:43:00,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 04:43:00,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:43:00,935 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:00,936 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:00,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:43:00,937 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:43:00,939 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:00,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:43:00,940 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:43:00,961 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:43:00,963 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:00,963 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:00,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:43:00,965 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:43:00,967 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:00,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 04:43:00,968 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:43:00,988 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:43:00,989 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 04:43:00,989 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:35 [2021-06-05 04:43:01,065 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 04:43:01,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2071370745] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:01,065 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:43:01,065 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 04:43:01,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878925211] [2021-06-05 04:43:01,065 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 04:43:01,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:43:01,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 04:43:01,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:43:01,065 INFO L87 Difference]: Start difference. First operand 246 states and 535 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:43:01,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:43:01,747 INFO L93 Difference]: Finished difference Result 294 states and 619 transitions. [2021-06-05 04:43:01,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 04:43:01,748 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:43:01,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:43:01,748 INFO L225 Difference]: With dead ends: 294 [2021-06-05 04:43:01,748 INFO L226 Difference]: Without dead ends: 278 [2021-06-05 04:43:01,748 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 792.8ms TimeCoverageRelationStatistics Valid=135, Invalid=1055, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 04:43:01,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2021-06-05 04:43:01,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 245. [2021-06-05 04:43:01,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 244 states have (on average 2.1844262295081966) internal successors, (533), 244 states have internal predecessors, (533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:43:01,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 533 transitions. [2021-06-05 04:43:01,750 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 533 transitions. Word has length 20 [2021-06-05 04:43:01,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:43:01,750 INFO L482 AbstractCegarLoop]: Abstraction has 245 states and 533 transitions. [2021-06-05 04:43:01,750 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:43:01,750 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 533 transitions. [2021-06-05 04:43:01,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:43:01,750 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:43:01,750 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:43:01,951 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3696,771 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:43:01,951 INFO L430 AbstractCegarLoop]: === Iteration 777 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:43:01,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:43:01,951 INFO L82 PathProgramCache]: Analyzing trace with hash 453377370, now seen corresponding path program 771 times [2021-06-05 04:43:01,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:43:01,951 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115758370] [2021-06-05 04:43:01,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:43:01,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:43:02,119 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:43:02,119 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:43:02,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115758370] [2021-06-05 04:43:02,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115758370] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:02,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552871464] [2021-06-05 04:43:02,119 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 772 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 772 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:43:02,145 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 04:43:02,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:43:02,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 04:43:02,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:43:02,295 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:02,296 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:02,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:43:02,297 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:43:02,299 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:02,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:43:02,300 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:43:02,353 INFO L628 ElimStorePlain]: treesize reduction 79, result has 46.6 percent of original size [2021-06-05 04:43:02,356 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:02,356 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 19 treesize of output 15 [2021-06-05 04:43:02,357 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:43:02,375 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:43:02,378 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:02,378 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 13 treesize of output 9 [2021-06-05 04:43:02,379 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:43:02,398 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:43:02,400 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:02,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 04:43:02,402 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:43:02,419 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:43:02,420 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:43:02,420 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:161, output treesize:32 [2021-06-05 04:43:02,505 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 04:43:02,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [552871464] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:02,505 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:43:02,505 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 04:43:02,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23054878] [2021-06-05 04:43:02,505 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 04:43:02,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:43:02,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 04:43:02,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:43:02,506 INFO L87 Difference]: Start difference. First operand 245 states and 533 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:43:02,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:43:02,958 INFO L93 Difference]: Finished difference Result 285 states and 610 transitions. [2021-06-05 04:43:02,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 04:43:02,959 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:43:02,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:43:02,959 INFO L225 Difference]: With dead ends: 285 [2021-06-05 04:43:02,959 INFO L226 Difference]: Without dead ends: 273 [2021-06-05 04:43:02,959 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 598.9ms TimeCoverageRelationStatistics Valid=125, Invalid=931, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 04:43:02,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2021-06-05 04:43:02,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 245. [2021-06-05 04:43:02,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 244 states have (on average 2.1844262295081966) internal successors, (533), 244 states have internal predecessors, (533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:43:02,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 533 transitions. [2021-06-05 04:43:02,961 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 533 transitions. Word has length 20 [2021-06-05 04:43:02,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:43:02,961 INFO L482 AbstractCegarLoop]: Abstraction has 245 states and 533 transitions. [2021-06-05 04:43:02,961 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:43:02,961 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 533 transitions. [2021-06-05 04:43:02,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:43:02,961 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:43:02,961 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:43:03,162 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3699,772 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:43:03,162 INFO L430 AbstractCegarLoop]: === Iteration 778 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:43:03,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:43:03,162 INFO L82 PathProgramCache]: Analyzing trace with hash 577564578, now seen corresponding path program 772 times [2021-06-05 04:43:03,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:43:03,162 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334163681] [2021-06-05 04:43:03,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:43:03,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:43:03,321 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:43:03,321 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:43:03,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334163681] [2021-06-05 04:43:03,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334163681] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:03,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620684972] [2021-06-05 04:43:03,321 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 04:43:03,346 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:43:03,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:43:03,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:43:03,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:43:03,503 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:03,503 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:03,503 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 27 treesize of output 21 [2021-06-05 04:43:03,504 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:43:03,506 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:03,506 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 27 treesize of output 21 [2021-06-05 04:43:03,507 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:43:03,529 INFO L628 ElimStorePlain]: treesize reduction 36, result has 42.9 percent of original size [2021-06-05 04:43:03,531 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:03,531 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 10 treesize of output 6 [2021-06-05 04:43:03,533 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:43:03,539 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:43:03,540 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:43:03,540 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-06-05 04:43:03,584 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:43:03,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [620684972] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:03,584 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:43:03,584 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 04:43:03,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624575641] [2021-06-05 04:43:03,585 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 04:43:03,585 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:43:03,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 04:43:03,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:43:03,585 INFO L87 Difference]: Start difference. First operand 245 states and 533 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:43:03,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:43:03,885 INFO L93 Difference]: Finished difference Result 267 states and 572 transitions. [2021-06-05 04:43:03,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:43:03,885 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:43:03,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:43:03,885 INFO L225 Difference]: With dead ends: 267 [2021-06-05 04:43:03,886 INFO L226 Difference]: Without dead ends: 254 [2021-06-05 04:43:03,886 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 397.8ms TimeCoverageRelationStatistics Valid=94, Invalid=662, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:43:03,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-06-05 04:43:03,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 248. [2021-06-05 04:43:03,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 247 states have (on average 2.182186234817814) internal successors, (539), 247 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:43:03,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 539 transitions. [2021-06-05 04:43:03,887 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 539 transitions. Word has length 20 [2021-06-05 04:43:03,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:43:03,888 INFO L482 AbstractCegarLoop]: Abstraction has 248 states and 539 transitions. [2021-06-05 04:43:03,888 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:43:03,888 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 539 transitions. [2021-06-05 04:43:03,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:43:03,888 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:43:03,888 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:43:04,088 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 773 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3704 [2021-06-05 04:43:04,088 INFO L430 AbstractCegarLoop]: === Iteration 779 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:43:04,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:43:04,089 INFO L82 PathProgramCache]: Analyzing trace with hash 1713749850, now seen corresponding path program 773 times [2021-06-05 04:43:04,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:43:04,089 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495065242] [2021-06-05 04:43:04,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:43:04,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:43:04,284 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:43:04,284 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:43:04,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495065242] [2021-06-05 04:43:04,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495065242] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:04,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707203611] [2021-06-05 04:43:04,284 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 774 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 774 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:43:04,311 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 04:43:04,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:43:04,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:43:04,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:43:04,444 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:04,445 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:04,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:43:04,446 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:43:04,448 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:04,449 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:04,449 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 19 treesize of output 15 [2021-06-05 04:43:04,449 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:43:04,452 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:04,452 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:04,452 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 19 treesize of output 15 [2021-06-05 04:43:04,453 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:43:04,455 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:04,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:43:04,456 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:43:04,511 INFO L628 ElimStorePlain]: treesize reduction 80, result has 45.6 percent of original size [2021-06-05 04:43:04,513 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:04,513 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:04,514 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 13 treesize of output 9 [2021-06-05 04:43:04,515 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:43:04,517 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:04,517 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 10 treesize of output 6 [2021-06-05 04:43:04,518 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:43:04,541 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:43:04,542 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 04:43:04,542 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:173, output treesize:38 [2021-06-05 04:43:04,616 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 04:43:04,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1707203611] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:04,616 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:43:04,616 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 04:43:04,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075318533] [2021-06-05 04:43:04,616 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 04:43:04,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:43:04,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 04:43:04,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:43:04,617 INFO L87 Difference]: Start difference. First operand 248 states and 539 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:43:04,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:43:04,890 INFO L93 Difference]: Finished difference Result 286 states and 599 transitions. [2021-06-05 04:43:04,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:43:04,890 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:43:04,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:43:04,891 INFO L225 Difference]: With dead ends: 286 [2021-06-05 04:43:04,891 INFO L226 Difference]: Without dead ends: 267 [2021-06-05 04:43:04,891 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 482.7ms TimeCoverageRelationStatistics Valid=100, Invalid=656, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:43:04,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2021-06-05 04:43:04,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 247. [2021-06-05 04:43:04,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 2.182926829268293) internal successors, (537), 246 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:43:04,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 537 transitions. [2021-06-05 04:43:04,893 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 537 transitions. Word has length 20 [2021-06-05 04:43:04,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:43:04,893 INFO L482 AbstractCegarLoop]: Abstraction has 247 states and 537 transitions. [2021-06-05 04:43:04,893 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:43:04,893 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 537 transitions. [2021-06-05 04:43:04,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:43:04,893 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:43:04,893 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:43:05,093 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3705,774 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:43:05,093 INFO L430 AbstractCegarLoop]: === Iteration 780 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:43:05,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:43:05,094 INFO L82 PathProgramCache]: Analyzing trace with hash -432420910, now seen corresponding path program 774 times [2021-06-05 04:43:05,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:43:05,094 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465675284] [2021-06-05 04:43:05,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:43:05,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:43:05,287 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 04:43:05,287 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:43:05,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465675284] [2021-06-05 04:43:05,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465675284] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:05,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707061347] [2021-06-05 04:43:05,287 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 775 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 775 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:43:05,313 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 04:43:05,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:43:05,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 04:43:05,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:43:05,439 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:05,439 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:05,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:43:05,440 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:43:05,442 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:05,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:43:05,443 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:43:05,464 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:43:05,466 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:05,467 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:05,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:43:05,468 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:43:05,470 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:05,470 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 13 treesize of output 9 [2021-06-05 04:43:05,471 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:43:05,491 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:43:05,492 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:43:05,492 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:35 [2021-06-05 04:43:05,563 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 04:43:05,563 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1707061347] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:05,564 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:43:05,564 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 04:43:05,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474032072] [2021-06-05 04:43:05,564 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 04:43:05,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:43:05,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 04:43:05,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:43:05,564 INFO L87 Difference]: Start difference. First operand 247 states and 537 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:43:06,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:43:06,055 INFO L93 Difference]: Finished difference Result 273 states and 590 transitions. [2021-06-05 04:43:06,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:43:06,056 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:43:06,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:43:06,056 INFO L225 Difference]: With dead ends: 273 [2021-06-05 04:43:06,056 INFO L226 Difference]: Without dead ends: 264 [2021-06-05 04:43:06,056 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 637.2ms TimeCoverageRelationStatistics Valid=136, Invalid=986, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 04:43:06,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2021-06-05 04:43:06,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 246. [2021-06-05 04:43:06,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 245 states have (on average 2.183673469387755) internal successors, (535), 245 states have internal predecessors, (535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:43:06,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 535 transitions. [2021-06-05 04:43:06,058 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 535 transitions. Word has length 20 [2021-06-05 04:43:06,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:43:06,058 INFO L482 AbstractCegarLoop]: Abstraction has 246 states and 535 transitions. [2021-06-05 04:43:06,058 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:43:06,058 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 535 transitions. [2021-06-05 04:43:06,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:43:06,058 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:43:06,058 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:43:06,262 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 775 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3708 [2021-06-05 04:43:06,262 INFO L430 AbstractCegarLoop]: === Iteration 781 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:43:06,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:43:06,262 INFO L82 PathProgramCache]: Analyzing trace with hash 1755762266, now seen corresponding path program 775 times [2021-06-05 04:43:06,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:43:06,262 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914425956] [2021-06-05 04:43:06,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:43:06,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:43:06,484 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 04:43:06,484 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:43:06,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914425956] [2021-06-05 04:43:06,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914425956] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:06,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932608522] [2021-06-05 04:43:06,484 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 776 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 776 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:43:06,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:43:06,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:43:06,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:43:06,702 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:06,702 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:06,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:43:06,703 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:43:06,706 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:06,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:43:06,707 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:43:06,767 INFO L628 ElimStorePlain]: treesize reduction 88, result has 45.0 percent of original size [2021-06-05 04:43:06,770 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:06,770 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 10 treesize of output 6 [2021-06-05 04:43:06,772 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:43:06,795 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:43:06,798 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:06,798 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 19 treesize of output 15 [2021-06-05 04:43:06,799 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:43:06,821 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:43:06,823 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:06,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 04:43:06,825 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:43:06,845 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:43:06,846 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 04:43:06,846 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-06-05 04:43:06,928 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 04:43:06,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [932608522] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:06,928 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:43:06,928 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 04:43:06,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920795620] [2021-06-05 04:43:06,928 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 04:43:06,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:43:06,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 04:43:06,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:43:06,929 INFO L87 Difference]: Start difference. First operand 246 states and 535 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:43:07,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:43:07,533 INFO L93 Difference]: Finished difference Result 304 states and 640 transitions. [2021-06-05 04:43:07,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 04:43:07,533 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:43:07,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:43:07,533 INFO L225 Difference]: With dead ends: 304 [2021-06-05 04:43:07,533 INFO L226 Difference]: Without dead ends: 285 [2021-06-05 04:43:07,534 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 777.9ms TimeCoverageRelationStatistics Valid=135, Invalid=987, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 04:43:07,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2021-06-05 04:43:07,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 245. [2021-06-05 04:43:07,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 244 states have (on average 2.1844262295081966) internal successors, (533), 244 states have internal predecessors, (533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:43:07,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 533 transitions. [2021-06-05 04:43:07,536 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 533 transitions. Word has length 20 [2021-06-05 04:43:07,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:43:07,536 INFO L482 AbstractCegarLoop]: Abstraction has 245 states and 533 transitions. [2021-06-05 04:43:07,536 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:43:07,536 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 533 transitions. [2021-06-05 04:43:07,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:43:07,536 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:43:07,536 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:43:07,736 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 776 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3711 [2021-06-05 04:43:07,736 INFO L430 AbstractCegarLoop]: === Iteration 782 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:43:07,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:43:07,737 INFO L82 PathProgramCache]: Analyzing trace with hash -1112378326, now seen corresponding path program 776 times [2021-06-05 04:43:07,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:43:07,737 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020752532] [2021-06-05 04:43:07,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:43:07,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:43:07,903 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 04:43:07,903 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:43:07,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020752532] [2021-06-05 04:43:07,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020752532] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:07,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395350729] [2021-06-05 04:43:07,903 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 777 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 777 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:43:07,928 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:43:07,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:43:07,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 04:43:07,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:43:08,083 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:08,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 04:43:08,084 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:43:08,090 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:43:08,092 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:08,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 04:43:08,093 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:43:08,098 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:43:08,099 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 04:43:08,099 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:38, output treesize:13 [2021-06-05 04:43:08,116 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:43:08,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1395350729] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:08,117 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:43:08,117 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-06-05 04:43:08,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301949114] [2021-06-05 04:43:08,117 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 04:43:08,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:43:08,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 04:43:08,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:43:08,117 INFO L87 Difference]: Start difference. First operand 245 states and 533 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:43:08,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:43:08,331 INFO L93 Difference]: Finished difference Result 269 states and 576 transitions. [2021-06-05 04:43:08,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:43:08,332 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:43:08,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:43:08,332 INFO L225 Difference]: With dead ends: 269 [2021-06-05 04:43:08,332 INFO L226 Difference]: Without dead ends: 262 [2021-06-05 04:43:08,332 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 343.8ms TimeCoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:43:08,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-06-05 04:43:08,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 249. [2021-06-05 04:43:08,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 248 states have (on average 2.185483870967742) internal successors, (542), 248 states have internal predecessors, (542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:43:08,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 542 transitions. [2021-06-05 04:43:08,334 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 542 transitions. Word has length 20 [2021-06-05 04:43:08,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:43:08,334 INFO L482 AbstractCegarLoop]: Abstraction has 249 states and 542 transitions. [2021-06-05 04:43:08,334 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:43:08,334 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 542 transitions. [2021-06-05 04:43:08,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:43:08,334 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:43:08,334 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:43:08,534 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 777 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3716 [2021-06-05 04:43:08,535 INFO L430 AbstractCegarLoop]: === Iteration 783 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:43:08,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:43:08,535 INFO L82 PathProgramCache]: Analyzing trace with hash 23806946, now seen corresponding path program 777 times [2021-06-05 04:43:08,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:43:08,535 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307357703] [2021-06-05 04:43:08,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:43:08,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:43:08,692 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:43:08,692 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:43:08,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307357703] [2021-06-05 04:43:08,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307357703] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:08,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [149300744] [2021-06-05 04:43:08,692 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 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 04:43:08,719 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 04:43:08,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:43:08,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 04:43:08,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:43:08,844 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:08,845 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:08,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:43:08,846 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:43:08,848 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:08,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:43:08,849 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:43:08,870 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:43:08,872 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:08,872 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:08,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:43:08,874 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:43:08,876 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:08,876 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 13 treesize of output 9 [2021-06-05 04:43:08,877 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:43:08,897 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:43:08,898 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 04:43:08,898 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:35 [2021-06-05 04:43:08,986 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 04:43:08,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [149300744] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:08,986 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:43:08,986 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 04:43:08,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740993517] [2021-06-05 04:43:08,987 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 04:43:08,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:43:08,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 04:43:08,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:43:08,987 INFO L87 Difference]: Start difference. First operand 249 states and 542 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:43:09,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:43:09,254 INFO L93 Difference]: Finished difference Result 276 states and 592 transitions. [2021-06-05 04:43:09,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:43:09,254 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:43:09,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:43:09,255 INFO L225 Difference]: With dead ends: 276 [2021-06-05 04:43:09,255 INFO L226 Difference]: Without dead ends: 269 [2021-06-05 04:43:09,255 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 354.3ms TimeCoverageRelationStatistics Valid=82, Invalid=568, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:43:09,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2021-06-05 04:43:09,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 248. [2021-06-05 04:43:09,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 247 states have (on average 2.182186234817814) internal successors, (539), 247 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:43:09,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 539 transitions. [2021-06-05 04:43:09,257 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 539 transitions. Word has length 20 [2021-06-05 04:43:09,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:43:09,257 INFO L482 AbstractCegarLoop]: Abstraction has 248 states and 539 transitions. [2021-06-05 04:43:09,257 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:43:09,257 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 539 transitions. [2021-06-05 04:43:09,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:43:09,257 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:43:09,257 INFO L521 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:43:09,457 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3717,778 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:43:09,458 INFO L430 AbstractCegarLoop]: === Iteration 784 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:43:09,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:43:09,458 INFO L82 PathProgramCache]: Analyzing trace with hash -1898432346, now seen corresponding path program 778 times [2021-06-05 04:43:09,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:43:09,458 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028889890] [2021-06-05 04:43:09,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:43:09,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:43:09,530 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:43:09,531 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:43:09,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028889890] [2021-06-05 04:43:09,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028889890] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:09,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1403022637] [2021-06-05 04:43:09,531 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 04:43:09,556 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:43:09,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:43:09,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:43:09,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:43:09,724 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:43:09,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1403022637] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:09,724 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:43:09,724 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:43:09,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143265378] [2021-06-05 04:43:09,724 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:43:09,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:43:09,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:43:09,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:43:09,725 INFO L87 Difference]: Start difference. First operand 248 states and 539 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:43:10,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:43:10,087 INFO L93 Difference]: Finished difference Result 297 states and 637 transitions. [2021-06-05 04:43:10,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:43:10,087 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:43:10,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:43:10,087 INFO L225 Difference]: With dead ends: 297 [2021-06-05 04:43:10,087 INFO L226 Difference]: Without dead ends: 297 [2021-06-05 04:43:10,087 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 409.7ms TimeCoverageRelationStatistics Valid=106, Invalid=596, Unknown=0, NotChecked=0, Total=702 [2021-06-05 04:43:10,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2021-06-05 04:43:10,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 248. [2021-06-05 04:43:10,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 247 states have (on average 2.182186234817814) internal successors, (539), 247 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:43:10,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 539 transitions. [2021-06-05 04:43:10,089 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 539 transitions. Word has length 20 [2021-06-05 04:43:10,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:43:10,089 INFO L482 AbstractCegarLoop]: Abstraction has 248 states and 539 transitions. [2021-06-05 04:43:10,089 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 04:43:10,089 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 539 transitions. [2021-06-05 04:43:10,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:43:10,090 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:43:10,090 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:43:10,290 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3722,779 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:43:10,290 INFO L430 AbstractCegarLoop]: === Iteration 785 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:43:10,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:43:10,290 INFO L82 PathProgramCache]: Analyzing trace with hash -2122363814, now seen corresponding path program 779 times [2021-06-05 04:43:10,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:43:10,290 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185122216] [2021-06-05 04:43:10,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:43:10,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:43:10,513 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:43:10,513 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:43:10,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185122216] [2021-06-05 04:43:10,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185122216] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:10,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589118813] [2021-06-05 04:43:10,513 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 780 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 780 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:43:10,539 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 04:43:10,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:43:10,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:43:10,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:43:10,692 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:10,692 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:10,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:43:10,693 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:43:10,696 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:10,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:43:10,696 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:43:10,756 INFO L628 ElimStorePlain]: treesize reduction 88, result has 45.0 percent of original size [2021-06-05 04:43:10,758 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:10,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:43:10,760 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:43:10,783 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:43:10,785 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:10,786 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 19 treesize of output 15 [2021-06-05 04:43:10,786 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:43:10,808 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:43:10,810 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:10,810 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 10 treesize of output 6 [2021-06-05 04:43:10,811 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:43:10,832 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:43:10,833 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 04:43:10,833 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-06-05 04:43:10,915 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 04:43:10,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1589118813] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:10,915 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:43:10,915 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 04:43:10,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996054733] [2021-06-05 04:43:10,915 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 04:43:10,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:43:10,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 04:43:10,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:43:10,915 INFO L87 Difference]: Start difference. First operand 248 states and 539 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:43:11,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:43:11,497 INFO L93 Difference]: Finished difference Result 303 states and 638 transitions. [2021-06-05 04:43:11,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 04:43:11,497 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:43:11,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:43:11,497 INFO L225 Difference]: With dead ends: 303 [2021-06-05 04:43:11,497 INFO L226 Difference]: Without dead ends: 284 [2021-06-05 04:43:11,497 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 740.9ms TimeCoverageRelationStatistics Valid=130, Invalid=926, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 04:43:11,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2021-06-05 04:43:11,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 247. [2021-06-05 04:43:11,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 2.182926829268293) internal successors, (537), 246 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:43:11,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 537 transitions. [2021-06-05 04:43:11,499 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 537 transitions. Word has length 20 [2021-06-05 04:43:11,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:43:11,499 INFO L482 AbstractCegarLoop]: Abstraction has 247 states and 537 transitions. [2021-06-05 04:43:11,499 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:43:11,499 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 537 transitions. [2021-06-05 04:43:11,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:43:11,500 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:43:11,500 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:43:11,700 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 780 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3734 [2021-06-05 04:43:11,700 INFO L430 AbstractCegarLoop]: === Iteration 786 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:43:11,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:43:11,700 INFO L82 PathProgramCache]: Analyzing trace with hash 65819362, now seen corresponding path program 780 times [2021-06-05 04:43:11,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:43:11,700 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44914676] [2021-06-05 04:43:11,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:43:11,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:43:11,920 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 04:43:11,920 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:43:11,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44914676] [2021-06-05 04:43:11,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44914676] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:11,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086390102] [2021-06-05 04:43:11,920 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 781 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 781 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:43:11,945 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:43:11,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:43:11,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 04:43:11,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:43:12,135 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:12,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:43:12,136 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:43:12,157 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:43:12,160 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:12,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:43:12,160 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:43:12,180 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:43:12,182 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:12,183 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 13 treesize of output 9 [2021-06-05 04:43:12,184 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:43:12,203 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:43:12,206 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:12,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:43:12,207 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:43:12,226 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:43:12,227 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:43:12,227 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:77, output treesize:35 [2021-06-05 04:43:12,320 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 04:43:12,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2086390102] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:12,320 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:43:12,320 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 04:43:12,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132515507] [2021-06-05 04:43:12,320 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 04:43:12,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:43:12,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 04:43:12,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:43:12,320 INFO L87 Difference]: Start difference. First operand 247 states and 537 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:43:12,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:43:12,871 INFO L93 Difference]: Finished difference Result 285 states and 606 transitions. [2021-06-05 04:43:12,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:43:12,871 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:43:12,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:43:12,871 INFO L225 Difference]: With dead ends: 285 [2021-06-05 04:43:12,871 INFO L226 Difference]: Without dead ends: 271 [2021-06-05 04:43:12,872 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 734.2ms TimeCoverageRelationStatistics Valid=125, Invalid=997, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 04:43:12,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2021-06-05 04:43:12,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 249. [2021-06-05 04:43:12,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 248 states have (on average 2.189516129032258) internal successors, (543), 248 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:43:12,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 543 transitions. [2021-06-05 04:43:12,874 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 543 transitions. Word has length 20 [2021-06-05 04:43:12,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:43:12,874 INFO L482 AbstractCegarLoop]: Abstraction has 249 states and 543 transitions. [2021-06-05 04:43:12,874 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:43:12,874 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 543 transitions. [2021-06-05 04:43:12,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:43:12,874 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:43:12,874 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:43:13,074 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 781 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3739 [2021-06-05 04:43:13,074 INFO L430 AbstractCegarLoop]: === Iteration 787 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:43:13,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:43:13,075 INFO L82 PathProgramCache]: Analyzing trace with hash -819978918, now seen corresponding path program 781 times [2021-06-05 04:43:13,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:43:13,075 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505106241] [2021-06-05 04:43:13,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:43:13,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:43:13,274 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 04:43:13,274 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:43:13,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505106241] [2021-06-05 04:43:13,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505106241] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:13,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658862936] [2021-06-05 04:43:13,274 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 782 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 782 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:43:13,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:43:13,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:43:13,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:43:13,524 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:13,524 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:13,524 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 19 treesize of output 15 [2021-06-05 04:43:13,525 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:43:13,528 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:13,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:43:13,529 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:43:13,590 INFO L628 ElimStorePlain]: treesize reduction 88, result has 46.0 percent of original size [2021-06-05 04:43:13,592 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:13,593 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 13 treesize of output 9 [2021-06-05 04:43:13,594 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:43:13,617 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:43:13,620 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:13,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:43:13,621 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:43:13,643 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:43:13,645 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:13,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 04:43:13,647 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:43:13,667 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:43:13,668 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:43:13,668 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-06-05 04:43:13,754 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 04:43:13,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [658862936] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:13,754 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:43:13,754 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 04:43:13,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763330769] [2021-06-05 04:43:13,754 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 04:43:13,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:43:13,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 04:43:13,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=534, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:43:13,755 INFO L87 Difference]: Start difference. First operand 249 states and 543 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:43:14,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:43:14,427 INFO L93 Difference]: Finished difference Result 311 states and 656 transitions. [2021-06-05 04:43:14,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 04:43:14,428 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:43:14,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:43:14,428 INFO L225 Difference]: With dead ends: 311 [2021-06-05 04:43:14,428 INFO L226 Difference]: Without dead ends: 292 [2021-06-05 04:43:14,428 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 782.2ms TimeCoverageRelationStatistics Valid=122, Invalid=1000, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 04:43:14,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2021-06-05 04:43:14,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 249. [2021-06-05 04:43:14,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 248 states have (on average 2.189516129032258) internal successors, (543), 248 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:43:14,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 543 transitions. [2021-06-05 04:43:14,430 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 543 transitions. Word has length 20 [2021-06-05 04:43:14,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:43:14,430 INFO L482 AbstractCegarLoop]: Abstraction has 249 states and 543 transitions. [2021-06-05 04:43:14,430 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:43:14,430 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 543 transitions. [2021-06-05 04:43:14,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:43:14,430 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:43:14,430 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:43:14,631 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3746,782 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:43:14,631 INFO L430 AbstractCegarLoop]: === Iteration 788 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:43:14,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:43:14,631 INFO L82 PathProgramCache]: Analyzing trace with hash -2124318238, now seen corresponding path program 782 times [2021-06-05 04:43:14,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:43:14,631 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970790311] [2021-06-05 04:43:14,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:43:14,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:43:14,818 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 04:43:14,818 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:43:14,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970790311] [2021-06-05 04:43:14,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970790311] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:14,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364324525] [2021-06-05 04:43:14,818 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 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 04:43:14,843 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:43:14,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:43:14,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 04:43:14,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:43:15,019 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:15,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 04:43:15,021 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:43:15,027 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:43:15,029 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:15,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 04:43:15,029 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:43:15,035 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:43:15,036 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:43:15,036 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:38, output treesize:13 [2021-06-05 04:43:15,073 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 04:43:15,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1364324525] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:15,073 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:43:15,073 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 04:43:15,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038653439] [2021-06-05 04:43:15,073 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 04:43:15,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:43:15,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 04:43:15,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=491, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:43:15,074 INFO L87 Difference]: Start difference. First operand 249 states and 543 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:43:15,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:43:15,363 INFO L93 Difference]: Finished difference Result 275 states and 589 transitions. [2021-06-05 04:43:15,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:43:15,364 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:43:15,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:43:15,364 INFO L225 Difference]: With dead ends: 275 [2021-06-05 04:43:15,364 INFO L226 Difference]: Without dead ends: 268 [2021-06-05 04:43:15,364 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 419.5ms TimeCoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2021-06-05 04:43:15,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2021-06-05 04:43:15,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 254. [2021-06-05 04:43:15,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 253 states have (on average 2.1897233201581026) internal successors, (554), 253 states have internal predecessors, (554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:43:15,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 554 transitions. [2021-06-05 04:43:15,366 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 554 transitions. Word has length 20 [2021-06-05 04:43:15,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:43:15,366 INFO L482 AbstractCegarLoop]: Abstraction has 254 states and 554 transitions. [2021-06-05 04:43:15,366 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:43:15,366 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 554 transitions. [2021-06-05 04:43:15,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:43:15,366 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:43:15,366 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:43:15,567 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 783 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3751 [2021-06-05 04:43:15,567 INFO L430 AbstractCegarLoop]: === Iteration 789 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:43:15,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:43:15,567 INFO L82 PathProgramCache]: Analyzing trace with hash -1262313174, now seen corresponding path program 783 times [2021-06-05 04:43:15,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:43:15,567 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062096185] [2021-06-05 04:43:15,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:43:15,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:43:15,743 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:43:15,744 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:43:15,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062096185] [2021-06-05 04:43:15,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062096185] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:15,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644384676] [2021-06-05 04:43:15,744 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 784 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 784 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:43:15,770 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 04:43:15,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:43:15,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 04:43:15,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:43:15,934 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:15,934 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:15,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:43:15,935 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:43:15,937 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:15,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:43:15,938 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:43:15,956 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:43:15,958 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:15,958 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:15,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:43:15,959 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:43:15,961 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:15,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 04:43:15,962 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:43:15,979 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:43:15,980 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 04:43:15,980 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:71, output treesize:29 [2021-06-05 04:43:16,036 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 04:43:16,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1644384676] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:16,036 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:43:16,036 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 04:43:16,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047643063] [2021-06-05 04:43:16,036 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 04:43:16,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:43:16,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 04:43:16,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=539, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:43:16,036 INFO L87 Difference]: Start difference. First operand 254 states and 554 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:43:16,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:43:16,615 INFO L93 Difference]: Finished difference Result 287 states and 612 transitions. [2021-06-05 04:43:16,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 04:43:16,615 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:43:16,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:43:16,615 INFO L225 Difference]: With dead ends: 287 [2021-06-05 04:43:16,615 INFO L226 Difference]: Without dead ends: 274 [2021-06-05 04:43:16,615 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 615.1ms TimeCoverageRelationStatistics Valid=103, Invalid=953, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 04:43:16,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2021-06-05 04:43:16,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 255. [2021-06-05 04:43:16,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 254 states have (on average 2.188976377952756) internal successors, (556), 254 states have internal predecessors, (556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:43:16,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 556 transitions. [2021-06-05 04:43:16,617 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 556 transitions. Word has length 20 [2021-06-05 04:43:16,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:43:16,617 INFO L482 AbstractCegarLoop]: Abstraction has 255 states and 556 transitions. [2021-06-05 04:43:16,617 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:43:16,617 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 556 transitions. [2021-06-05 04:43:16,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:43:16,618 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:43:16,618 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:43:16,818 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3752,784 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:43:16,818 INFO L430 AbstractCegarLoop]: === Iteration 790 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:43:16,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:43:16,818 INFO L82 PathProgramCache]: Analyzing trace with hash -126127902, now seen corresponding path program 784 times [2021-06-05 04:43:16,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:43:16,818 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062366705] [2021-06-05 04:43:16,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:43:16,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:43:16,990 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:43:16,990 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:43:16,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062366705] [2021-06-05 04:43:16,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062366705] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:16,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674403797] [2021-06-05 04:43:16,990 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 785 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 785 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:43:17,015 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:43:17,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:43:17,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:43:17,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:43:17,172 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:17,172 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:17,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:43:17,173 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:43:17,176 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:17,176 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:17,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:43:17,177 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:43:17,180 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:17,181 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:17,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:43:17,182 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:43:17,186 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:17,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:43:17,187 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:43:17,248 INFO L628 ElimStorePlain]: treesize reduction 77, result has 45.4 percent of original size [2021-06-05 04:43:17,251 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:17,251 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:17,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:43:17,253 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:43:17,255 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:17,255 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 10 treesize of output 6 [2021-06-05 04:43:17,256 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:43:17,279 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:43:17,280 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 04:43:17,280 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:173, output treesize:38 [2021-06-05 04:43:17,357 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:43:17,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [674403797] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:17,357 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:43:17,357 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 04:43:17,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906499520] [2021-06-05 04:43:17,357 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 04:43:17,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:43:17,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 04:43:17,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=490, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:43:17,357 INFO L87 Difference]: Start difference. First operand 255 states and 556 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:43:17,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:43:17,784 INFO L93 Difference]: Finished difference Result 286 states and 608 transitions. [2021-06-05 04:43:17,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 04:43:17,785 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:43:17,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:43:17,785 INFO L225 Difference]: With dead ends: 286 [2021-06-05 04:43:17,785 INFO L226 Difference]: Without dead ends: 274 [2021-06-05 04:43:17,785 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 532.2ms TimeCoverageRelationStatistics Valid=93, Invalid=777, Unknown=0, NotChecked=0, Total=870 [2021-06-05 04:43:17,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2021-06-05 04:43:17,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 254. [2021-06-05 04:43:17,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 253 states have (on average 2.1897233201581026) internal successors, (554), 253 states have internal predecessors, (554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:43:17,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 554 transitions. [2021-06-05 04:43:17,787 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 554 transitions. Word has length 20 [2021-06-05 04:43:17,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:43:17,787 INFO L482 AbstractCegarLoop]: Abstraction has 254 states and 554 transitions. [2021-06-05 04:43:17,787 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:43:17,787 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 554 transitions. [2021-06-05 04:43:17,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:43:17,788 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:43:17,788 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:43:17,988 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3755,785 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:43:17,988 INFO L430 AbstractCegarLoop]: === Iteration 791 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:43:17,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:43:17,988 INFO L82 PathProgramCache]: Analyzing trace with hash 925870002, now seen corresponding path program 785 times [2021-06-05 04:43:17,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:43:17,988 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870923526] [2021-06-05 04:43:17,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:43:17,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:43:18,177 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:43:18,177 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:43:18,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870923526] [2021-06-05 04:43:18,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870923526] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:18,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675632917] [2021-06-05 04:43:18,177 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 786 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 786 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:43:18,204 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 04:43:18,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:43:18,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:43:18,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:43:18,373 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:18,374 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:18,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 04:43:18,375 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:43:18,377 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:18,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 04:43:18,378 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:43:18,400 INFO L628 ElimStorePlain]: treesize reduction 36, result has 42.9 percent of original size [2021-06-05 04:43:18,402 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:18,402 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 10 treesize of output 6 [2021-06-05 04:43:18,403 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:43:18,410 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:43:18,410 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 04:43:18,411 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-06-05 04:43:18,447 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:43:18,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [675632917] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:18,447 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:43:18,447 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 04:43:18,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872841540] [2021-06-05 04:43:18,448 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 04:43:18,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:43:18,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 04:43:18,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:43:18,448 INFO L87 Difference]: Start difference. First operand 254 states and 554 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:43:18,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:43:18,773 INFO L93 Difference]: Finished difference Result 276 states and 593 transitions. [2021-06-05 04:43:18,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 04:43:18,773 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:43:18,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:43:18,773 INFO L225 Difference]: With dead ends: 276 [2021-06-05 04:43:18,773 INFO L226 Difference]: Without dead ends: 263 [2021-06-05 04:43:18,774 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 485.4ms TimeCoverageRelationStatistics Valid=92, Invalid=720, Unknown=0, NotChecked=0, Total=812 [2021-06-05 04:43:18,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2021-06-05 04:43:18,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 256. [2021-06-05 04:43:18,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 255 states have (on average 2.1882352941176473) internal successors, (558), 255 states have internal predecessors, (558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:43:18,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 558 transitions. [2021-06-05 04:43:18,775 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 558 transitions. Word has length 20 [2021-06-05 04:43:18,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:43:18,776 INFO L482 AbstractCegarLoop]: Abstraction has 256 states and 558 transitions. [2021-06-05 04:43:18,776 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:43:18,776 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 558 transitions. [2021-06-05 04:43:18,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:43:18,776 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:43:18,776 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:43:18,976 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3758,786 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:43:18,976 INFO L430 AbstractCegarLoop]: === Iteration 792 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:43:18,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:43:18,977 INFO L82 PathProgramCache]: Analyzing trace with hash 2062055274, now seen corresponding path program 786 times [2021-06-05 04:43:18,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:43:18,977 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25767140] [2021-06-05 04:43:18,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:43:18,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:43:19,190 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:43:19,190 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:43:19,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25767140] [2021-06-05 04:43:19,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25767140] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:19,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904721025] [2021-06-05 04:43:19,190 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 04:43:19,217 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 04:43:19,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:43:19,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:43:19,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:43:19,358 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:19,358 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:19,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:43:19,359 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:43:19,362 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:19,362 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:19,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:43:19,363 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:43:19,366 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:19,366 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:19,366 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 19 treesize of output 15 [2021-06-05 04:43:19,367 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:43:19,369 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:19,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:43:19,370 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:43:19,422 INFO L628 ElimStorePlain]: treesize reduction 80, result has 45.6 percent of original size [2021-06-05 04:43:19,425 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:19,425 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:19,425 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 13 treesize of output 9 [2021-06-05 04:43:19,427 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:43:19,429 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:19,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:43:19,430 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:43:19,453 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:43:19,454 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 04:43:19,454 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:173, output treesize:38 [2021-06-05 04:43:19,532 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 04:43:19,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [904721025] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:19,532 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:43:19,532 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 04:43:19,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928834910] [2021-06-05 04:43:19,532 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 04:43:19,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:43:19,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 04:43:19,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:43:19,532 INFO L87 Difference]: Start difference. First operand 256 states and 558 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:43:20,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:43:20,077 INFO L93 Difference]: Finished difference Result 296 states and 622 transitions. [2021-06-05 04:43:20,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 04:43:20,077 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:43:20,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:43:20,078 INFO L225 Difference]: With dead ends: 296 [2021-06-05 04:43:20,078 INFO L226 Difference]: Without dead ends: 277 [2021-06-05 04:43:20,078 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 674.4ms TimeCoverageRelationStatistics Valid=118, Invalid=938, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 04:43:20,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2021-06-05 04:43:20,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 255. [2021-06-05 04:43:20,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 254 states have (on average 2.188976377952756) internal successors, (556), 254 states have internal predecessors, (556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:43:20,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 556 transitions. [2021-06-05 04:43:20,080 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 556 transitions. Word has length 20 [2021-06-05 04:43:20,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:43:20,080 INFO L482 AbstractCegarLoop]: Abstraction has 255 states and 556 transitions. [2021-06-05 04:43:20,080 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:43:20,080 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 556 transitions. [2021-06-05 04:43:20,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:43:20,080 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:43:20,080 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:43:20,280 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 787 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3759 [2021-06-05 04:43:20,281 INFO L430 AbstractCegarLoop]: === Iteration 793 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:43:20,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:43:20,281 INFO L82 PathProgramCache]: Analyzing trace with hash -84115486, now seen corresponding path program 787 times [2021-06-05 04:43:20,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:43:20,281 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758355731] [2021-06-05 04:43:20,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:43:20,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:43:20,455 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:43:20,456 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:43:20,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758355731] [2021-06-05 04:43:20,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758355731] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:20,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802335257] [2021-06-05 04:43:20,456 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 788 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 788 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:43:20,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:43:20,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:43:20,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:43:20,637 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:20,638 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:20,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:43:20,639 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:43:20,641 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:20,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:43:20,642 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:43:20,704 INFO L628 ElimStorePlain]: treesize reduction 85, result has 45.9 percent of original size [2021-06-05 04:43:20,707 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:20,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:43:20,708 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:43:20,732 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:43:20,734 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:20,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:43:20,735 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:43:20,757 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:43:20,759 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:20,759 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 13 treesize of output 9 [2021-06-05 04:43:20,760 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:43:20,781 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:43:20,782 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 04:43:20,782 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-06-05 04:43:20,859 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:43:20,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [802335257] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:20,859 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:43:20,860 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 04:43:20,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586901392] [2021-06-05 04:43:20,860 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 04:43:20,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:43:20,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 04:43:20,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:43:20,860 INFO L87 Difference]: Start difference. First operand 255 states and 556 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:43:21,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:43:21,198 INFO L93 Difference]: Finished difference Result 287 states and 618 transitions. [2021-06-05 04:43:21,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 04:43:21,198 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:43:21,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:43:21,198 INFO L225 Difference]: With dead ends: 287 [2021-06-05 04:43:21,198 INFO L226 Difference]: Without dead ends: 275 [2021-06-05 04:43:21,198 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 483.4ms TimeCoverageRelationStatistics Valid=101, Invalid=769, Unknown=0, NotChecked=0, Total=870 [2021-06-05 04:43:21,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2021-06-05 04:43:21,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 254. [2021-06-05 04:43:21,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 253 states have (on average 2.1897233201581026) internal successors, (554), 253 states have internal predecessors, (554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:43:21,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 554 transitions. [2021-06-05 04:43:21,200 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 554 transitions. Word has length 20 [2021-06-05 04:43:21,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:43:21,200 INFO L482 AbstractCegarLoop]: Abstraction has 254 states and 554 transitions. [2021-06-05 04:43:21,200 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:43:21,201 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 554 transitions. [2021-06-05 04:43:21,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:43:21,201 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:43:21,201 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:43:21,401 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3762,788 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:43:21,401 INFO L430 AbstractCegarLoop]: === Iteration 794 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:43:21,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:43:21,401 INFO L82 PathProgramCache]: Analyzing trace with hash 40071722, now seen corresponding path program 788 times [2021-06-05 04:43:21,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:43:21,401 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974143980] [2021-06-05 04:43:21,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:43:21,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:43:21,577 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 04:43:21,577 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:43:21,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974143980] [2021-06-05 04:43:21,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974143980] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:21,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984600534] [2021-06-05 04:43:21,578 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 789 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 789 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:43:21,607 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:43:21,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:43:21,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 04:43:21,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:43:21,787 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:21,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 04:43:21,788 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:43:21,794 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:43:21,795 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:21,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:43:21,797 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:43:21,802 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:43:21,803 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 04:43:21,803 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:38, output treesize:13 [2021-06-05 04:43:21,821 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 04:43:21,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [984600534] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:21,821 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:43:21,821 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-06-05 04:43:21,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395370530] [2021-06-05 04:43:21,821 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 04:43:21,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:43:21,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 04:43:21,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:43:21,822 INFO L87 Difference]: Start difference. First operand 254 states and 554 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:43:22,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:43:22,055 INFO L93 Difference]: Finished difference Result 273 states and 587 transitions. [2021-06-05 04:43:22,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:43:22,056 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:43:22,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:43:22,056 INFO L225 Difference]: With dead ends: 273 [2021-06-05 04:43:22,056 INFO L226 Difference]: Without dead ends: 266 [2021-06-05 04:43:22,056 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 376.1ms TimeCoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:43:22,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2021-06-05 04:43:22,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 257. [2021-06-05 04:43:22,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 256 states have (on average 2.19140625) internal successors, (561), 256 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:43:22,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 561 transitions. [2021-06-05 04:43:22,058 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 561 transitions. Word has length 20 [2021-06-05 04:43:22,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:43:22,058 INFO L482 AbstractCegarLoop]: Abstraction has 257 states and 561 transitions. [2021-06-05 04:43:22,058 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:43:22,058 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 561 transitions. [2021-06-05 04:43:22,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:43:22,058 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:43:22,058 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:43:22,259 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3767,789 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:43:22,259 INFO L430 AbstractCegarLoop]: === Iteration 795 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:43:22,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:43:22,259 INFO L82 PathProgramCache]: Analyzing trace with hash 1176256994, now seen corresponding path program 789 times [2021-06-05 04:43:22,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:43:22,259 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132780967] [2021-06-05 04:43:22,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:43:22,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:43:22,458 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:43:22,458 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:43:22,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132780967] [2021-06-05 04:43:22,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132780967] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:22,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039189134] [2021-06-05 04:43:22,458 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 790 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 790 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:43:22,485 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 04:43:22,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:43:22,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 04:43:22,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:43:22,625 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:22,625 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:22,626 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 19 treesize of output 15 [2021-06-05 04:43:22,626 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:43:22,629 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:22,629 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:22,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:43:22,630 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:43:22,632 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:22,632 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:22,633 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 19 treesize of output 15 [2021-06-05 04:43:22,633 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:43:22,636 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:22,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:43:22,636 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:43:22,684 INFO L628 ElimStorePlain]: treesize reduction 74, result has 43.9 percent of original size [2021-06-05 04:43:22,686 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:22,687 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:22,687 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 10 treesize of output 6 [2021-06-05 04:43:22,688 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:43:22,690 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:22,691 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 10 treesize of output 6 [2021-06-05 04:43:22,692 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:43:22,711 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:43:22,712 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 04:43:22,712 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:161, output treesize:32 [2021-06-05 04:43:22,794 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:43:22,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1039189134] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:22,794 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:43:22,794 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 04:43:22,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853957056] [2021-06-05 04:43:22,794 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 04:43:22,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:43:22,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 04:43:22,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=483, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:43:22,794 INFO L87 Difference]: Start difference. First operand 257 states and 561 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:43:23,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:43:23,190 INFO L93 Difference]: Finished difference Result 302 states and 636 transitions. [2021-06-05 04:43:23,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 04:43:23,191 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:43:23,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:43:23,191 INFO L225 Difference]: With dead ends: 302 [2021-06-05 04:43:23,191 INFO L226 Difference]: Without dead ends: 286 [2021-06-05 04:43:23,191 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 528.0ms TimeCoverageRelationStatistics Valid=97, Invalid=715, Unknown=0, NotChecked=0, Total=812 [2021-06-05 04:43:23,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2021-06-05 04:43:23,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 256. [2021-06-05 04:43:23,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 255 states have (on average 2.1882352941176473) internal successors, (558), 255 states have internal predecessors, (558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:43:23,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 558 transitions. [2021-06-05 04:43:23,193 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 558 transitions. Word has length 20 [2021-06-05 04:43:23,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:43:23,193 INFO L482 AbstractCegarLoop]: Abstraction has 256 states and 558 transitions. [2021-06-05 04:43:23,193 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:43:23,193 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 558 transitions. [2021-06-05 04:43:23,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:43:23,194 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:43:23,194 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:43:23,394 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 790 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3768 [2021-06-05 04:43:23,394 INFO L430 AbstractCegarLoop]: === Iteration 796 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:43:23,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:43:23,394 INFO L82 PathProgramCache]: Analyzing trace with hash -969913766, now seen corresponding path program 790 times [2021-06-05 04:43:23,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:43:23,394 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575784049] [2021-06-05 04:43:23,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:43:23,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:43:23,605 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:43:23,605 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:43:23,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575784049] [2021-06-05 04:43:23,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575784049] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:23,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284352601] [2021-06-05 04:43:23,605 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 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 04:43:23,631 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:43:23,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:43:23,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:43:23,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:43:23,791 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:23,791 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:23,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:43:23,792 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:43:23,795 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:23,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:43:23,796 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:43:23,858 INFO L628 ElimStorePlain]: treesize reduction 88, result has 46.0 percent of original size [2021-06-05 04:43:23,860 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:23,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 04:43:23,862 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:43:23,886 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:43:23,888 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:23,889 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 19 treesize of output 15 [2021-06-05 04:43:23,889 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:43:23,911 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:43:23,914 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:23,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:43:23,915 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:43:23,936 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:43:23,937 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 04:43:23,937 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-06-05 04:43:24,017 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 04:43:24,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284352601] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:24,017 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:43:24,017 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 04:43:24,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053590330] [2021-06-05 04:43:24,017 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 04:43:24,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:43:24,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 04:43:24,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:43:24,018 INFO L87 Difference]: Start difference. First operand 256 states and 558 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:43:24,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:43:24,519 INFO L93 Difference]: Finished difference Result 306 states and 647 transitions. [2021-06-05 04:43:24,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 04:43:24,520 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:43:24,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:43:24,520 INFO L225 Difference]: With dead ends: 306 [2021-06-05 04:43:24,520 INFO L226 Difference]: Without dead ends: 287 [2021-06-05 04:43:24,520 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 712.2ms TimeCoverageRelationStatistics Valid=142, Invalid=1048, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 04:43:24,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2021-06-05 04:43:24,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 256. [2021-06-05 04:43:24,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 255 states have (on average 2.1882352941176473) internal successors, (558), 255 states have internal predecessors, (558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:43:24,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 558 transitions. [2021-06-05 04:43:24,522 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 558 transitions. Word has length 20 [2021-06-05 04:43:24,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:43:24,522 INFO L482 AbstractCegarLoop]: Abstraction has 256 states and 558 transitions. [2021-06-05 04:43:24,522 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:43:24,522 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 558 transitions. [2021-06-05 04:43:24,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:43:24,523 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:43:24,523 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:43:24,723 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3772,791 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:43:24,723 INFO L430 AbstractCegarLoop]: === Iteration 797 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:43:24,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:43:24,723 INFO L82 PathProgramCache]: Analyzing trace with hash 1218269410, now seen corresponding path program 791 times [2021-06-05 04:43:24,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:43:24,723 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995558268] [2021-06-05 04:43:24,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:43:24,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:43:24,946 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 04:43:24,946 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:43:24,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995558268] [2021-06-05 04:43:24,946 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995558268] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:24,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118584933] [2021-06-05 04:43:24,946 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 792 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 792 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:43:24,972 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:43:24,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:43:24,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:43:24,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:43:25,171 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:25,171 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:25,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:43:25,172 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:43:25,175 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:25,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:43:25,176 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:43:25,237 INFO L628 ElimStorePlain]: treesize reduction 88, result has 46.0 percent of original size [2021-06-05 04:43:25,239 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:25,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:43:25,240 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:43:25,262 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:43:25,264 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:25,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 04:43:25,266 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:43:25,288 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:43:25,290 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:25,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:43:25,291 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:43:25,312 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:43:25,313 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 04:43:25,313 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-06-05 04:43:25,397 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 04:43:25,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2118584933] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:25,397 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:43:25,397 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 04:43:25,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945523770] [2021-06-05 04:43:25,397 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 04:43:25,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:43:25,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 04:43:25,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:43:25,398 INFO L87 Difference]: Start difference. First operand 256 states and 558 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:43:26,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:43:26,056 INFO L93 Difference]: Finished difference Result 311 states and 657 transitions. [2021-06-05 04:43:26,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 04:43:26,057 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:43:26,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:43:26,057 INFO L225 Difference]: With dead ends: 311 [2021-06-05 04:43:26,057 INFO L226 Difference]: Without dead ends: 292 [2021-06-05 04:43:26,057 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 832.8ms TimeCoverageRelationStatistics Valid=142, Invalid=1118, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 04:43:26,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2021-06-05 04:43:26,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 256. [2021-06-05 04:43:26,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 255 states have (on average 2.1882352941176473) internal successors, (558), 255 states have internal predecessors, (558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:43:26,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 558 transitions. [2021-06-05 04:43:26,059 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 558 transitions. Word has length 20 [2021-06-05 04:43:26,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:43:26,059 INFO L482 AbstractCegarLoop]: Abstraction has 256 states and 558 transitions. [2021-06-05 04:43:26,059 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:43:26,059 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 558 transitions. [2021-06-05 04:43:26,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:43:26,060 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:43:26,060 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:43:26,260 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3777,792 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:43:26,260 INFO L430 AbstractCegarLoop]: === Iteration 798 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:43:26,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:43:26,260 INFO L82 PathProgramCache]: Analyzing trace with hash -1649871182, now seen corresponding path program 792 times [2021-06-05 04:43:26,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:43:26,260 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671379439] [2021-06-05 04:43:26,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:43:26,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:43:26,427 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 04:43:26,427 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:43:26,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671379439] [2021-06-05 04:43:26,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671379439] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:26,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885595012] [2021-06-05 04:43:26,427 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 793 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 793 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:43:26,454 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 04:43:26,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:43:26,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 04:43:26,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:43:26,609 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:26,609 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:26,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:43:26,610 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:43:26,612 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:26,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:43:26,613 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:43:26,631 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:43:26,633 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:26,634 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:26,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:43:26,635 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:43:26,637 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:26,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 04:43:26,639 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:43:26,656 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:43:26,657 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 04:43:26,657 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:71, output treesize:29 [2021-06-05 04:43:26,710 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:43:26,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [885595012] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:26,710 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:43:26,710 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 04:43:26,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827454029] [2021-06-05 04:43:26,710 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 04:43:26,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:43:26,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 04:43:26,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:43:26,711 INFO L87 Difference]: Start difference. First operand 256 states and 558 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:43:27,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:43:27,055 INFO L93 Difference]: Finished difference Result 279 states and 599 transitions. [2021-06-05 04:43:27,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:43:27,056 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:43:27,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:43:27,056 INFO L225 Difference]: With dead ends: 279 [2021-06-05 04:43:27,056 INFO L226 Difference]: Without dead ends: 266 [2021-06-05 04:43:27,056 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 442.9ms TimeCoverageRelationStatistics Valid=90, Invalid=722, Unknown=0, NotChecked=0, Total=812 [2021-06-05 04:43:27,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2021-06-05 04:43:27,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 260. [2021-06-05 04:43:27,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 259 states have (on average 2.1853281853281854) internal successors, (566), 259 states have internal predecessors, (566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:43:27,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 566 transitions. [2021-06-05 04:43:27,058 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 566 transitions. Word has length 20 [2021-06-05 04:43:27,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:43:27,058 INFO L482 AbstractCegarLoop]: Abstraction has 260 states and 566 transitions. [2021-06-05 04:43:27,058 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:43:27,058 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 566 transitions. [2021-06-05 04:43:27,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:43:27,058 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:43:27,058 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:43:27,259 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 793 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3782 [2021-06-05 04:43:27,259 INFO L430 AbstractCegarLoop]: === Iteration 799 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:43:27,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:43:27,259 INFO L82 PathProgramCache]: Analyzing trace with hash -513685910, now seen corresponding path program 793 times [2021-06-05 04:43:27,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:43:27,259 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945328058] [2021-06-05 04:43:27,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:43:27,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:43:27,457 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:43:27,457 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:43:27,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945328058] [2021-06-05 04:43:27,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945328058] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:27,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15744620] [2021-06-05 04:43:27,457 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 794 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 794 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:43:27,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:43:27,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:43:27,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:43:27,619 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:27,619 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:27,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:43:27,620 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:43:27,623 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:27,623 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:27,623 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 19 treesize of output 15 [2021-06-05 04:43:27,624 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:43:27,627 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:27,627 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:27,627 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 19 treesize of output 15 [2021-06-05 04:43:27,628 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:43:27,630 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:27,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:43:27,631 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:43:27,687 INFO L628 ElimStorePlain]: treesize reduction 80, result has 46.7 percent of original size [2021-06-05 04:43:27,689 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:27,690 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:27,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 04:43:27,691 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:43:27,693 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:27,694 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 13 treesize of output 9 [2021-06-05 04:43:27,695 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:43:27,722 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:43:27,724 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 04:43:27,724 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:173, output treesize:38 [2021-06-05 04:43:27,799 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:43:27,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [15744620] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:27,799 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:43:27,799 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 04:43:27,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691624405] [2021-06-05 04:43:27,799 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 04:43:27,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:43:27,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 04:43:27,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:43:27,799 INFO L87 Difference]: Start difference. First operand 260 states and 566 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:43:28,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:43:28,156 INFO L93 Difference]: Finished difference Result 299 states and 628 transitions. [2021-06-05 04:43:28,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:43:28,156 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:43:28,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:43:28,156 INFO L225 Difference]: With dead ends: 299 [2021-06-05 04:43:28,156 INFO L226 Difference]: Without dead ends: 280 [2021-06-05 04:43:28,156 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 484.4ms TimeCoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:43:28,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2021-06-05 04:43:28,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 259. [2021-06-05 04:43:28,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 258 states have (on average 2.186046511627907) internal successors, (564), 258 states have internal predecessors, (564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:43:28,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 564 transitions. [2021-06-05 04:43:28,158 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 564 transitions. Word has length 20 [2021-06-05 04:43:28,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:43:28,158 INFO L482 AbstractCegarLoop]: Abstraction has 259 states and 564 transitions. [2021-06-05 04:43:28,158 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:43:28,158 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 564 transitions. [2021-06-05 04:43:28,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:43:28,159 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:43:28,159 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:43:28,359 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3785,794 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:43:28,359 INFO L430 AbstractCegarLoop]: === Iteration 800 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:43:28,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:43:28,360 INFO L82 PathProgramCache]: Analyzing trace with hash 1635110626, now seen corresponding path program 794 times [2021-06-05 04:43:28,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:43:28,360 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814324210] [2021-06-05 04:43:28,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:43:28,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:43:28,533 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 04:43:28,533 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:43:28,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814324210] [2021-06-05 04:43:28,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814324210] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:28,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572863147] [2021-06-05 04:43:28,533 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 795 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 795 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:43:28,558 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:43:28,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:43:28,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 04:43:28,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:43:28,686 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:28,686 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:28,686 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 19 treesize of output 15 [2021-06-05 04:43:28,687 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:43:28,689 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:28,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:43:28,690 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:43:28,712 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:43:28,714 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:28,714 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:28,715 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 10 treesize of output 6 [2021-06-05 04:43:28,716 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:43:28,731 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:28,731 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 10 treesize of output 6 [2021-06-05 04:43:28,733 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:43:28,758 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:43:28,759 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:43:28,759 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:35 [2021-06-05 04:43:28,854 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 04:43:28,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1572863147] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:28,854 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:43:28,854 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 04:43:28,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270210441] [2021-06-05 04:43:28,855 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 04:43:28,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:43:28,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 04:43:28,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=528, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:43:28,855 INFO L87 Difference]: Start difference. First operand 259 states and 564 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:43:29,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:43:29,098 INFO L93 Difference]: Finished difference Result 278 states and 600 transitions. [2021-06-05 04:43:29,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:43:29,099 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:43:29,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:43:29,099 INFO L225 Difference]: With dead ends: 278 [2021-06-05 04:43:29,099 INFO L226 Difference]: Without dead ends: 271 [2021-06-05 04:43:29,099 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 415.6ms TimeCoverageRelationStatistics Valid=91, Invalid=665, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:43:29,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2021-06-05 04:43:29,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 259. [2021-06-05 04:43:29,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 258 states have (on average 2.186046511627907) internal successors, (564), 258 states have internal predecessors, (564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:43:29,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 564 transitions. [2021-06-05 04:43:29,101 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 564 transitions. Word has length 20 [2021-06-05 04:43:29,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:43:29,101 INFO L482 AbstractCegarLoop]: Abstraction has 259 states and 564 transitions. [2021-06-05 04:43:29,101 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:43:29,101 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 564 transitions. [2021-06-05 04:43:29,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:43:29,101 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:43:29,101 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:43:29,302 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3788,795 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:43:29,302 INFO L430 AbstractCegarLoop]: === Iteration 801 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:43:29,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:43:29,302 INFO L82 PathProgramCache]: Analyzing trace with hash -471673494, now seen corresponding path program 795 times [2021-06-05 04:43:29,302 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:43:29,302 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570276468] [2021-06-05 04:43:29,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:43:29,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:43:29,518 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 04:43:29,518 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:43:29,519 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570276468] [2021-06-05 04:43:29,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570276468] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:29,519 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366483409] [2021-06-05 04:43:29,519 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 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 04:43:29,545 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:43:29,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:43:29,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 04:43:29,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:43:29,737 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:29,737 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 19 treesize of output 15 [2021-06-05 04:43:29,738 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:43:29,759 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:43:29,762 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:29,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:43:29,763 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:43:29,784 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:43:29,787 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:29,787 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 19 treesize of output 15 [2021-06-05 04:43:29,787 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:43:29,807 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:43:29,809 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:29,809 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 10 treesize of output 6 [2021-06-05 04:43:29,810 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:43:29,828 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:43:29,829 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 04:43:29,829 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:77, output treesize:35 [2021-06-05 04:43:29,921 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 04:43:29,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [366483409] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:29,922 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:43:29,922 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 04:43:29,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260438379] [2021-06-05 04:43:29,922 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 04:43:29,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:43:29,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 04:43:29,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:43:29,922 INFO L87 Difference]: Start difference. First operand 259 states and 564 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:43:30,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:43:30,416 INFO L93 Difference]: Finished difference Result 290 states and 619 transitions. [2021-06-05 04:43:30,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:43:30,416 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:43:30,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:43:30,416 INFO L225 Difference]: With dead ends: 290 [2021-06-05 04:43:30,416 INFO L226 Difference]: Without dead ends: 276 [2021-06-05 04:43:30,416 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 653.7ms TimeCoverageRelationStatistics Valid=112, Invalid=880, Unknown=0, NotChecked=0, Total=992 [2021-06-05 04:43:30,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2021-06-05 04:43:30,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 259. [2021-06-05 04:43:30,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 258 states have (on average 2.186046511627907) internal successors, (564), 258 states have internal predecessors, (564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:43:30,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 564 transitions. [2021-06-05 04:43:30,418 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 564 transitions. Word has length 20 [2021-06-05 04:43:30,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:43:30,418 INFO L482 AbstractCegarLoop]: Abstraction has 259 states and 564 transitions. [2021-06-05 04:43:30,418 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:43:30,418 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 564 transitions. [2021-06-05 04:43:30,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:43:30,419 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:43:30,419 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:43:30,619 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 796 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3791 [2021-06-05 04:43:30,619 INFO L430 AbstractCegarLoop]: === Iteration 802 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:43:30,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:43:30,619 INFO L82 PathProgramCache]: Analyzing trace with hash -1357471774, now seen corresponding path program 796 times [2021-06-05 04:43:30,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:43:30,619 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092570600] [2021-06-05 04:43:30,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:43:30,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:43:30,823 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:43:30,823 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:43:30,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092570600] [2021-06-05 04:43:30,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092570600] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:30,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313181891] [2021-06-05 04:43:30,823 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 797 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 797 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:43:30,848 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:43:30,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:43:30,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:43:30,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:43:31,070 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:31,071 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:31,071 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 19 treesize of output 15 [2021-06-05 04:43:31,072 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:43:31,074 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:31,075 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 19 treesize of output 15 [2021-06-05 04:43:31,075 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:43:31,136 INFO L628 ElimStorePlain]: treesize reduction 85, result has 46.9 percent of original size [2021-06-05 04:43:31,139 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:31,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 04:43:31,140 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:43:31,164 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:43:31,166 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:31,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:43:31,167 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:43:31,190 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:43:31,193 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:31,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 04:43:31,194 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:43:31,215 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:43:31,217 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 04:43:31,217 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-06-05 04:43:31,304 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 04:43:31,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1313181891] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:31,304 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:43:31,304 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 04:43:31,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797258380] [2021-06-05 04:43:31,304 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 04:43:31,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:43:31,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 04:43:31,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=534, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:43:31,304 INFO L87 Difference]: Start difference. First operand 259 states and 564 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:43:31,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:43:31,940 INFO L93 Difference]: Finished difference Result 317 states and 669 transitions. [2021-06-05 04:43:31,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 04:43:31,941 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:43:31,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:43:31,941 INFO L225 Difference]: With dead ends: 317 [2021-06-05 04:43:31,941 INFO L226 Difference]: Without dead ends: 298 [2021-06-05 04:43:31,941 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 718.8ms TimeCoverageRelationStatistics Valid=116, Invalid=940, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 04:43:31,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2021-06-05 04:43:31,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 259. [2021-06-05 04:43:31,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 258 states have (on average 2.186046511627907) internal successors, (564), 258 states have internal predecessors, (564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:43:31,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 564 transitions. [2021-06-05 04:43:31,943 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 564 transitions. Word has length 20 [2021-06-05 04:43:31,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:43:31,943 INFO L482 AbstractCegarLoop]: Abstraction has 259 states and 564 transitions. [2021-06-05 04:43:31,943 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:43:31,943 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 564 transitions. [2021-06-05 04:43:31,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:43:31,944 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:43:31,944 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:43:32,144 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 797 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3798 [2021-06-05 04:43:32,144 INFO L430 AbstractCegarLoop]: === Iteration 803 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:43:32,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:43:32,144 INFO L82 PathProgramCache]: Analyzing trace with hash 1796473642, now seen corresponding path program 797 times [2021-06-05 04:43:32,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:43:32,144 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595634170] [2021-06-05 04:43:32,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:43:32,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:43:32,342 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 04:43:32,342 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:43:32,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595634170] [2021-06-05 04:43:32,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595634170] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:32,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046399427] [2021-06-05 04:43:32,343 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 798 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 798 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:43:32,369 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 04:43:32,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:43:32,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:43:32,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:43:32,536 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:32,536 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:32,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 04:43:32,537 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:43:32,539 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:32,540 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 27 treesize of output 21 [2021-06-05 04:43:32,540 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:43:32,562 INFO L628 ElimStorePlain]: treesize reduction 36, result has 42.9 percent of original size [2021-06-05 04:43:32,564 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:32,564 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 10 treesize of output 6 [2021-06-05 04:43:32,566 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:43:32,572 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:43:32,573 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 04:43:32,573 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-06-05 04:43:32,610 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:43:32,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2046399427] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:32,610 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:43:32,610 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 04:43:32,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047353677] [2021-06-05 04:43:32,610 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 04:43:32,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:43:32,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 04:43:32,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:43:32,610 INFO L87 Difference]: Start difference. First operand 259 states and 564 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:43:32,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:43:32,870 INFO L93 Difference]: Finished difference Result 283 states and 607 transitions. [2021-06-05 04:43:32,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:43:32,871 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:43:32,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:43:32,871 INFO L225 Difference]: With dead ends: 283 [2021-06-05 04:43:32,871 INFO L226 Difference]: Without dead ends: 270 [2021-06-05 04:43:32,871 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 429.7ms TimeCoverageRelationStatistics Valid=78, Invalid=624, Unknown=0, NotChecked=0, Total=702 [2021-06-05 04:43:32,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2021-06-05 04:43:32,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 264. [2021-06-05 04:43:32,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 263 states have (on average 2.182509505703422) internal successors, (574), 263 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:43:32,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 574 transitions. [2021-06-05 04:43:32,873 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 574 transitions. Word has length 20 [2021-06-05 04:43:32,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:43:32,873 INFO L482 AbstractCegarLoop]: Abstraction has 264 states and 574 transitions. [2021-06-05 04:43:32,873 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:43:32,873 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 574 transitions. [2021-06-05 04:43:32,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:43:32,873 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:43:32,873 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:43:33,074 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3803,798 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:43:33,074 INFO L430 AbstractCegarLoop]: === Iteration 804 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:43:33,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:43:33,074 INFO L82 PathProgramCache]: Analyzing trace with hash -1362308382, now seen corresponding path program 798 times [2021-06-05 04:43:33,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:43:33,074 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566392558] [2021-06-05 04:43:33,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:43:33,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:43:33,301 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:43:33,301 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:43:33,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566392558] [2021-06-05 04:43:33,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566392558] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:33,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375732688] [2021-06-05 04:43:33,302 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 799 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 799 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:43:33,328 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 04:43:33,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:43:33,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 04:43:33,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:43:33,465 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:33,466 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:33,466 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 19 treesize of output 15 [2021-06-05 04:43:33,466 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:43:33,469 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:33,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:43:33,469 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:43:33,491 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:43:33,493 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:33,494 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:33,494 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 10 treesize of output 6 [2021-06-05 04:43:33,495 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:43:33,497 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:33,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 04:43:33,498 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:43:33,519 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:43:33,520 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 04:43:33,520 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:35 [2021-06-05 04:43:33,615 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 04:43:33,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [375732688] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:33,615 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:43:33,615 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 04:43:33,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446349257] [2021-06-05 04:43:33,615 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 04:43:33,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:43:33,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 04:43:33,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=534, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:43:33,616 INFO L87 Difference]: Start difference. First operand 264 states and 574 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:43:33,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:43:33,910 INFO L93 Difference]: Finished difference Result 281 states and 606 transitions. [2021-06-05 04:43:33,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:43:33,911 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:43:33,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:43:33,911 INFO L225 Difference]: With dead ends: 281 [2021-06-05 04:43:33,911 INFO L226 Difference]: Without dead ends: 274 [2021-06-05 04:43:33,911 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 493.0ms TimeCoverageRelationStatistics Valid=82, Invalid=674, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:43:33,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2021-06-05 04:43:33,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 263. [2021-06-05 04:43:33,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 262 states have (on average 2.183206106870229) internal successors, (572), 262 states have internal predecessors, (572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:43:33,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 572 transitions. [2021-06-05 04:43:33,913 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 572 transitions. Word has length 20 [2021-06-05 04:43:33,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:43:33,913 INFO L482 AbstractCegarLoop]: Abstraction has 263 states and 572 transitions. [2021-06-05 04:43:33,913 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:43:33,913 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 572 transitions. [2021-06-05 04:43:33,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:43:33,914 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:43:33,914 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:43:34,114 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 799 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3804 [2021-06-05 04:43:34,114 INFO L430 AbstractCegarLoop]: === Iteration 805 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:43:34,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:43:34,114 INFO L82 PathProgramCache]: Analyzing trace with hash 786488154, now seen corresponding path program 799 times [2021-06-05 04:43:34,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:43:34,115 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47483676] [2021-06-05 04:43:34,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:43:34,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:43:34,338 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 04:43:34,339 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:43:34,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47483676] [2021-06-05 04:43:34,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47483676] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:34,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756810114] [2021-06-05 04:43:34,339 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 800 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 800 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:43:34,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:43:34,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:43:34,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:43:34,529 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:34,529 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:34,529 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 19 treesize of output 15 [2021-06-05 04:43:34,530 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:43:34,533 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:34,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:43:34,534 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:43:34,595 INFO L628 ElimStorePlain]: treesize reduction 88, result has 45.0 percent of original size [2021-06-05 04:43:34,597 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:34,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:43:34,598 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:43:34,620 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:43:34,622 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:34,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 04:43:34,624 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:43:34,645 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:43:34,648 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:34,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:43:34,649 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:43:34,669 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:43:34,671 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 04:43:34,671 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-06-05 04:43:34,753 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:43:34,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [756810114] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:34,753 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:43:34,753 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 04:43:34,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492269432] [2021-06-05 04:43:34,753 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 04:43:34,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:43:34,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 04:43:34,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:43:34,754 INFO L87 Difference]: Start difference. First operand 263 states and 572 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:43:35,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:43:35,206 INFO L93 Difference]: Finished difference Result 311 states and 657 transitions. [2021-06-05 04:43:35,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 04:43:35,207 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:43:35,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:43:35,207 INFO L225 Difference]: With dead ends: 311 [2021-06-05 04:43:35,207 INFO L226 Difference]: Without dead ends: 292 [2021-06-05 04:43:35,207 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 662.6ms TimeCoverageRelationStatistics Valid=108, Invalid=822, Unknown=0, NotChecked=0, Total=930 [2021-06-05 04:43:35,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2021-06-05 04:43:35,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 262. [2021-06-05 04:43:35,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 261 states have (on average 2.1839080459770117) internal successors, (570), 261 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:43:35,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 570 transitions. [2021-06-05 04:43:35,209 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 570 transitions. Word has length 20 [2021-06-05 04:43:35,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:43:35,209 INFO L482 AbstractCegarLoop]: Abstraction has 262 states and 570 transitions. [2021-06-05 04:43:35,209 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:43:35,209 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 570 transitions. [2021-06-05 04:43:35,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:43:35,210 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:43:35,210 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:43:35,410 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3809,800 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:43:35,410 INFO L430 AbstractCegarLoop]: === Iteration 806 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:43:35,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:43:35,410 INFO L82 PathProgramCache]: Analyzing trace with hash -1320295966, now seen corresponding path program 800 times [2021-06-05 04:43:35,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:43:35,410 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010822034] [2021-06-05 04:43:35,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:43:35,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:43:35,637 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 04:43:35,637 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:43:35,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010822034] [2021-06-05 04:43:35,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010822034] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:35,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305786265] [2021-06-05 04:43:35,637 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 801 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 801 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:43:35,662 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:43:35,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:43:35,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 04:43:35,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:43:35,816 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:35,817 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:35,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:43:35,818 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:43:35,820 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:35,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:43:35,821 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:43:35,843 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:43:35,845 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:35,845 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:35,846 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 13 treesize of output 9 [2021-06-05 04:43:35,847 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:43:35,849 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:35,849 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 13 treesize of output 9 [2021-06-05 04:43:35,850 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:43:35,870 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:43:35,871 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:43:35,871 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:35 [2021-06-05 04:43:35,955 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:43:35,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1305786265] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:35,956 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:43:35,956 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 04:43:35,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454871722] [2021-06-05 04:43:35,956 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 04:43:35,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:43:35,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 04:43:35,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=538, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:43:35,956 INFO L87 Difference]: Start difference. First operand 262 states and 570 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:43:36,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:43:36,919 INFO L93 Difference]: Finished difference Result 354 states and 733 transitions. [2021-06-05 04:43:36,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 04:43:36,919 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:43:36,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:43:36,919 INFO L225 Difference]: With dead ends: 354 [2021-06-05 04:43:36,919 INFO L226 Difference]: Without dead ends: 324 [2021-06-05 04:43:36,920 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 1042.5ms TimeCoverageRelationStatistics Valid=149, Invalid=1257, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 04:43:36,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2021-06-05 04:43:36,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 265. [2021-06-05 04:43:36,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 264 states have (on average 2.1931818181818183) internal successors, (579), 264 states have internal predecessors, (579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:43:36,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 579 transitions. [2021-06-05 04:43:36,922 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 579 transitions. Word has length 20 [2021-06-05 04:43:36,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:43:36,922 INFO L482 AbstractCegarLoop]: Abstraction has 265 states and 579 transitions. [2021-06-05 04:43:36,922 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:43:36,922 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 579 transitions. [2021-06-05 04:43:36,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:43:36,922 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:43:36,922 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:43:37,123 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 801 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3814 [2021-06-05 04:43:37,123 INFO L430 AbstractCegarLoop]: === Iteration 807 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:43:37,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:43:37,123 INFO L82 PathProgramCache]: Analyzing trace with hash 2088873050, now seen corresponding path program 801 times [2021-06-05 04:43:37,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:43:37,123 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012934247] [2021-06-05 04:43:37,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:43:37,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:43:37,407 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:43:37,408 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:43:37,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012934247] [2021-06-05 04:43:37,408 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012934247] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:37,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485013007] [2021-06-05 04:43:37,408 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 802 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 802 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:43:37,434 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:43:37,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:43:37,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:43:37,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:43:37,665 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:37,666 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:37,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:43:37,667 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:43:37,670 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:37,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:43:37,671 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:43:37,730 INFO L628 ElimStorePlain]: treesize reduction 91, result has 43.1 percent of original size [2021-06-05 04:43:37,733 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:37,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 04:43:37,735 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:43:37,758 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:43:37,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:43:37,761 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:43:37,782 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:43:37,782 INFO L518 ElimStorePlain]: Eliminatee v_prenex_661 vanished before elimination [2021-06-05 04:43:37,783 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 04:43:37,783 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:173, output treesize:36 [2021-06-05 04:43:37,873 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:43:37,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [485013007] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:37,873 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:43:37,873 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 04:43:37,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865871077] [2021-06-05 04:43:37,873 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 04:43:37,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:43:37,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 04:43:37,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=536, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:43:37,874 INFO L87 Difference]: Start difference. First operand 265 states and 579 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:43:38,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:43:38,929 INFO L93 Difference]: Finished difference Result 383 states and 786 transitions. [2021-06-05 04:43:38,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 04:43:38,929 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:43:38,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:43:38,929 INFO L225 Difference]: With dead ends: 383 [2021-06-05 04:43:38,929 INFO L226 Difference]: Without dead ends: 343 [2021-06-05 04:43:38,929 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 1246.5ms TimeCoverageRelationStatistics Valid=166, Invalid=1240, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 04:43:38,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2021-06-05 04:43:38,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 265. [2021-06-05 04:43:38,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 264 states have (on average 2.1931818181818183) internal successors, (579), 264 states have internal predecessors, (579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:43:38,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 579 transitions. [2021-06-05 04:43:38,932 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 579 transitions. Word has length 20 [2021-06-05 04:43:38,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:43:38,932 INFO L482 AbstractCegarLoop]: Abstraction has 265 states and 579 transitions. [2021-06-05 04:43:38,932 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:43:38,932 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 579 transitions. [2021-06-05 04:43:38,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:43:38,932 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:43:38,932 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:43:39,132 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3817,802 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:43:39,132 INFO L430 AbstractCegarLoop]: === Iteration 808 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:43:39,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:43:39,133 INFO L82 PathProgramCache]: Analyzing trace with hash 398930146, now seen corresponding path program 802 times [2021-06-05 04:43:39,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:43:39,133 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439099481] [2021-06-05 04:43:39,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:43:39,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:43:39,355 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 04:43:39,355 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:43:39,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439099481] [2021-06-05 04:43:39,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439099481] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:39,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26325766] [2021-06-05 04:43:39,355 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 803 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 803 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:43:39,380 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:43:39,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:43:39,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:43:39,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:43:39,642 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:39,643 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:39,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:43:39,644 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:43:39,647 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:39,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:43:39,648 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:43:39,711 INFO L628 ElimStorePlain]: treesize reduction 88, result has 45.0 percent of original size [2021-06-05 04:43:39,714 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:39,714 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 10 treesize of output 6 [2021-06-05 04:43:39,715 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:43:39,739 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:43:39,741 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:39,741 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 19 treesize of output 15 [2021-06-05 04:43:39,742 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:43:39,764 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:43:39,766 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:39,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:43:39,767 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:43:39,788 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:43:39,789 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:43:39,789 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-06-05 04:43:39,874 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:43:39,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [26325766] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:39,874 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:43:39,874 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 04:43:39,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116880943] [2021-06-05 04:43:39,874 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 04:43:39,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:43:39,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 04:43:39,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=494, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:43:39,874 INFO L87 Difference]: Start difference. First operand 265 states and 579 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:43:40,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:43:40,395 INFO L93 Difference]: Finished difference Result 323 states and 684 transitions. [2021-06-05 04:43:40,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 04:43:40,395 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:43:40,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:43:40,396 INFO L225 Difference]: With dead ends: 323 [2021-06-05 04:43:40,396 INFO L226 Difference]: Without dead ends: 304 [2021-06-05 04:43:40,396 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 682.3ms TimeCoverageRelationStatistics Valid=100, Invalid=830, Unknown=0, NotChecked=0, Total=930 [2021-06-05 04:43:40,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2021-06-05 04:43:40,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 266. [2021-06-05 04:43:40,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 265 states have (on average 2.1962264150943396) internal successors, (582), 265 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:43:40,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 582 transitions. [2021-06-05 04:43:40,398 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 582 transitions. Word has length 20 [2021-06-05 04:43:40,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:43:40,398 INFO L482 AbstractCegarLoop]: Abstraction has 266 states and 582 transitions. [2021-06-05 04:43:40,398 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:43:40,398 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 582 transitions. [2021-06-05 04:43:40,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:43:40,398 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:43:40,398 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:43:40,599 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 803 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3822 [2021-06-05 04:43:40,599 INFO L430 AbstractCegarLoop]: === Iteration 809 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:43:40,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:43:40,599 INFO L82 PathProgramCache]: Analyzing trace with hash -816653578, now seen corresponding path program 803 times [2021-06-05 04:43:40,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:43:40,599 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883630512] [2021-06-05 04:43:40,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:43:40,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:43:40,791 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 04:43:40,791 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:43:40,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883630512] [2021-06-05 04:43:40,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883630512] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:40,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899061651] [2021-06-05 04:43:40,792 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 804 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 804 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:43:40,817 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:43:40,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:43:40,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:43:40,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:43:40,990 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:40,990 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:40,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 04:43:40,991 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:43:40,993 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:40,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 04:43:40,994 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:43:41,021 INFO L628 ElimStorePlain]: treesize reduction 48, result has 36.0 percent of original size [2021-06-05 04:43:41,023 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:41,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:43:41,025 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:43:41,031 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:43:41,032 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 04:43:41,032 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-06-05 04:43:41,071 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:43:41,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1899061651] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:41,071 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:43:41,071 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-06-05 04:43:41,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690729858] [2021-06-05 04:43:41,071 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 04:43:41,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:43:41,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 04:43:41,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=447, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:43:41,072 INFO L87 Difference]: Start difference. First operand 266 states and 582 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:43:41,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:43:41,433 INFO L93 Difference]: Finished difference Result 308 states and 649 transitions. [2021-06-05 04:43:41,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:43:41,433 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:43:41,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:43:41,433 INFO L225 Difference]: With dead ends: 308 [2021-06-05 04:43:41,433 INFO L226 Difference]: Without dead ends: 277 [2021-06-05 04:43:41,434 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 450.9ms TimeCoverageRelationStatistics Valid=82, Invalid=674, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:43:41,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2021-06-05 04:43:41,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 268. [2021-06-05 04:43:41,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 267 states have (on average 2.194756554307116) internal successors, (586), 267 states have internal predecessors, (586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:43:41,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 586 transitions. [2021-06-05 04:43:41,435 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 586 transitions. Word has length 20 [2021-06-05 04:43:41,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:43:41,436 INFO L482 AbstractCegarLoop]: Abstraction has 268 states and 586 transitions. [2021-06-05 04:43:41,436 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:43:41,436 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 586 transitions. [2021-06-05 04:43:41,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:43:41,436 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:43:41,436 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:43:41,636 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 804 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3827 [2021-06-05 04:43:41,636 INFO L430 AbstractCegarLoop]: === Iteration 810 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:43:41,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:43:41,637 INFO L82 PathProgramCache]: Analyzing trace with hash 135699630, now seen corresponding path program 804 times [2021-06-05 04:43:41,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:43:41,637 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936405474] [2021-06-05 04:43:41,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:43:41,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:43:41,882 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:43:41,883 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:43:41,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936405474] [2021-06-05 04:43:41,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936405474] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:41,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700765526] [2021-06-05 04:43:41,883 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 805 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 805 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:43:41,908 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:43:41,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:43:41,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 04:43:41,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:43:42,064 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:42,064 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:42,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:43:42,065 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:43:42,067 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:42,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:43:42,068 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:43:42,086 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:43:42,088 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:42,089 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:42,089 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 10 treesize of output 6 [2021-06-05 04:43:42,090 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:43:42,092 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:42,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:43:42,093 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:43:42,110 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:43:42,111 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 04:43:42,111 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:71, output treesize:29 [2021-06-05 04:43:42,168 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:43:42,168 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1700765526] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:42,168 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:43:42,168 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 04:43:42,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621479975] [2021-06-05 04:43:42,169 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 04:43:42,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:43:42,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 04:43:42,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:43:42,169 INFO L87 Difference]: Start difference. First operand 268 states and 586 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:43:42,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:43:42,853 INFO L93 Difference]: Finished difference Result 300 states and 644 transitions. [2021-06-05 04:43:42,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 04:43:42,853 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 04:43:42,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:43:42,854 INFO L225 Difference]: With dead ends: 300 [2021-06-05 04:43:42,854 INFO L226 Difference]: Without dead ends: 284 [2021-06-05 04:43:42,854 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 730.2ms TimeCoverageRelationStatistics Valid=112, Invalid=1078, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 04:43:42,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2021-06-05 04:43:42,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 269. [2021-06-05 04:43:42,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 268 states have (on average 2.1940298507462686) internal successors, (588), 268 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:43:42,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 588 transitions. [2021-06-05 04:43:42,856 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 588 transitions. Word has length 20 [2021-06-05 04:43:42,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:43:42,856 INFO L482 AbstractCegarLoop]: Abstraction has 269 states and 588 transitions. [2021-06-05 04:43:42,856 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 04:43:42,856 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 588 transitions. [2021-06-05 04:43:42,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:43:42,856 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:43:42,856 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:43:43,056 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 805 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3828 [2021-06-05 04:43:43,057 INFO L430 AbstractCegarLoop]: === Iteration 811 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:43:43,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:43:43,057 INFO L82 PathProgramCache]: Analyzing trace with hash 997704694, now seen corresponding path program 805 times [2021-06-05 04:43:43,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:43:43,057 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987742883] [2021-06-05 04:43:43,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:43:43,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:43:43,257 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 04:43:43,257 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:43:43,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987742883] [2021-06-05 04:43:43,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987742883] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:43,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492134874] [2021-06-05 04:43:43,258 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 806 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 806 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:43:43,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:43:43,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:43:43,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:43:43,469 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:43,470 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:43,470 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 27 treesize of output 21 [2021-06-05 04:43:43,471 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:43:43,473 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:43,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 04:43:43,474 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:43:43,497 INFO L628 ElimStorePlain]: treesize reduction 42, result has 44.0 percent of original size [2021-06-05 04:43:43,498 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:43,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 04:43:43,499 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:43:43,506 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:43:43,507 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 04:43:43,507 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-06-05 04:43:43,551 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 04:43:43,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [492134874] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:43,551 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:43:43,551 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 04:43:43,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413493603] [2021-06-05 04:43:43,552 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 04:43:43,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:43:43,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 04:43:43,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=490, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:43:43,552 INFO L87 Difference]: Start difference. First operand 269 states and 588 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:43:44,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:43:44,109 INFO L93 Difference]: Finished difference Result 299 states and 642 transitions. [2021-06-05 04:43:44,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 04:43:44,109 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 04:43:44,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:43:44,110 INFO L225 Difference]: With dead ends: 299 [2021-06-05 04:43:44,110 INFO L226 Difference]: Without dead ends: 286 [2021-06-05 04:43:44,110 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 645.5ms TimeCoverageRelationStatistics Valid=108, Invalid=948, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 04:43:44,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2021-06-05 04:43:44,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 270. [2021-06-05 04:43:44,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 269 states have (on average 2.193308550185874) internal successors, (590), 269 states have internal predecessors, (590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:43:44,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 590 transitions. [2021-06-05 04:43:44,112 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 590 transitions. Word has length 20 [2021-06-05 04:43:44,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:43:44,112 INFO L482 AbstractCegarLoop]: Abstraction has 270 states and 590 transitions. [2021-06-05 04:43:44,112 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 04:43:44,112 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 590 transitions. [2021-06-05 04:43:44,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:43:44,112 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:43:44,112 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:43:44,313 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3831,806 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:43:44,313 INFO L430 AbstractCegarLoop]: === Iteration 812 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:43:44,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:43:44,313 INFO L82 PathProgramCache]: Analyzing trace with hash 2133889966, now seen corresponding path program 806 times [2021-06-05 04:43:44,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:43:44,313 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408014262] [2021-06-05 04:43:44,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:43:44,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:43:44,592 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 04:43:44,592 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:43:44,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408014262] [2021-06-05 04:43:44,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408014262] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:44,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775464430] [2021-06-05 04:43:44,592 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 807 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 807 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:43:44,680 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:43:44,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:43:44,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:43:44,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:43:44,838 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:44,838 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:44,838 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 19 treesize of output 15 [2021-06-05 04:43:44,839 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:43:44,842 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:44,842 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:44,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:43:44,843 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:43:44,845 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:44,845 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:44,846 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 19 treesize of output 15 [2021-06-05 04:43:44,846 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:43:44,849 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:44,849 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 19 treesize of output 15 [2021-06-05 04:43:44,849 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:43:44,902 INFO L628 ElimStorePlain]: treesize reduction 83, result has 44.7 percent of original size [2021-06-05 04:43:44,905 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:44,905 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:44,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 04:43:44,906 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:43:44,909 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:44,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:43:44,910 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:43:44,933 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:43:44,934 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 04:43:44,934 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:173, output treesize:38 [2021-06-05 04:43:45,017 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 04:43:45,018 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1775464430] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:45,018 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:43:45,018 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 04:43:45,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365101717] [2021-06-05 04:43:45,018 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 04:43:45,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:43:45,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 04:43:45,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:43:45,018 INFO L87 Difference]: Start difference. First operand 270 states and 590 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:43:45,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:43:45,594 INFO L93 Difference]: Finished difference Result 299 states and 640 transitions. [2021-06-05 04:43:45,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 04:43:45,594 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 04:43:45,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:43:45,595 INFO L225 Difference]: With dead ends: 299 [2021-06-05 04:43:45,595 INFO L226 Difference]: Without dead ends: 287 [2021-06-05 04:43:45,595 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 737.2ms TimeCoverageRelationStatistics Valid=112, Invalid=944, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 04:43:45,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2021-06-05 04:43:45,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 268. [2021-06-05 04:43:45,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 267 states have (on average 2.194756554307116) internal successors, (586), 267 states have internal predecessors, (586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:43:45,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 586 transitions. [2021-06-05 04:43:45,597 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 586 transitions. Word has length 20 [2021-06-05 04:43:45,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:43:45,597 INFO L482 AbstractCegarLoop]: Abstraction has 268 states and 586 transitions. [2021-06-05 04:43:45,597 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 04:43:45,597 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 586 transitions. [2021-06-05 04:43:45,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:43:45,597 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:43:45,597 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:43:45,798 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 807 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3832 [2021-06-05 04:43:45,798 INFO L430 AbstractCegarLoop]: === Iteration 813 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:43:45,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:43:45,798 INFO L82 PathProgramCache]: Analyzing trace with hash -750098650, now seen corresponding path program 807 times [2021-06-05 04:43:45,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:43:45,798 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481068347] [2021-06-05 04:43:45,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:43:45,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:43:45,992 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 04:43:45,992 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:43:45,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481068347] [2021-06-05 04:43:45,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481068347] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:45,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174083697] [2021-06-05 04:43:45,993 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 808 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 808 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:43:46,019 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:43:46,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:43:46,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:43:46,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:43:46,176 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:46,176 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:46,176 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 27 treesize of output 21 [2021-06-05 04:43:46,177 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:43:46,179 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:46,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 04:43:46,180 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:43:46,201 INFO L628 ElimStorePlain]: treesize reduction 42, result has 39.1 percent of original size [2021-06-05 04:43:46,203 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:46,203 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 10 treesize of output 6 [2021-06-05 04:43:46,204 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:43:46,211 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:43:46,212 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 04:43:46,212 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-06-05 04:43:46,252 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 04:43:46,252 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [174083697] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:46,252 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:43:46,252 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 04:43:46,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416861381] [2021-06-05 04:43:46,252 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 04:43:46,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:43:46,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 04:43:46,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:43:46,252 INFO L87 Difference]: Start difference. First operand 268 states and 586 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:43:46,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:43:46,635 INFO L93 Difference]: Finished difference Result 297 states and 634 transitions. [2021-06-05 04:43:46,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:43:46,635 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 04:43:46,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:43:46,635 INFO L225 Difference]: With dead ends: 297 [2021-06-05 04:43:46,635 INFO L226 Difference]: Without dead ends: 281 [2021-06-05 04:43:46,635 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 473.2ms TimeCoverageRelationStatistics Valid=90, Invalid=722, Unknown=0, NotChecked=0, Total=812 [2021-06-05 04:43:46,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2021-06-05 04:43:46,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 270. [2021-06-05 04:43:46,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 269 states have (on average 2.193308550185874) internal successors, (590), 269 states have internal predecessors, (590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:43:46,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 590 transitions. [2021-06-05 04:43:46,637 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 590 transitions. Word has length 20 [2021-06-05 04:43:46,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:43:46,638 INFO L482 AbstractCegarLoop]: Abstraction has 270 states and 590 transitions. [2021-06-05 04:43:46,638 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 04:43:46,638 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 590 transitions. [2021-06-05 04:43:46,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:43:46,638 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:43:46,638 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:43:46,838 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 808 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3835 [2021-06-05 04:43:46,838 INFO L430 AbstractCegarLoop]: === Iteration 814 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:43:46,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:43:46,838 INFO L82 PathProgramCache]: Analyzing trace with hash 111906414, now seen corresponding path program 808 times [2021-06-05 04:43:46,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:43:46,839 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372452198] [2021-06-05 04:43:46,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:43:46,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:43:47,033 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 04:43:47,033 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:43:47,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372452198] [2021-06-05 04:43:47,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372452198] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:47,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954225986] [2021-06-05 04:43:47,034 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 809 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 809 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:43:47,058 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:43:47,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:43:47,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:43:47,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:43:47,229 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:47,229 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:47,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 04:43:47,230 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:43:47,232 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:47,233 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 27 treesize of output 21 [2021-06-05 04:43:47,233 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:43:47,256 INFO L628 ElimStorePlain]: treesize reduction 36, result has 42.9 percent of original size [2021-06-05 04:43:47,257 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:47,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:43:47,259 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:43:47,265 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:43:47,266 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 04:43:47,266 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-06-05 04:43:47,304 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 04:43:47,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1954225986] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:47,304 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:43:47,304 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-06-05 04:43:47,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844253596] [2021-06-05 04:43:47,304 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 04:43:47,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:43:47,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 04:43:47,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=447, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:43:47,305 INFO L87 Difference]: Start difference. First operand 270 states and 590 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:43:47,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:43:47,846 INFO L93 Difference]: Finished difference Result 302 states and 649 transitions. [2021-06-05 04:43:47,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:43:47,847 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:43:47,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:43:47,847 INFO L225 Difference]: With dead ends: 302 [2021-06-05 04:43:47,847 INFO L226 Difference]: Without dead ends: 289 [2021-06-05 04:43:47,850 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 569.6ms TimeCoverageRelationStatistics Valid=103, Invalid=827, Unknown=0, NotChecked=0, Total=930 [2021-06-05 04:43:47,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2021-06-05 04:43:47,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 271. [2021-06-05 04:43:47,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 270 states have (on average 2.1925925925925926) internal successors, (592), 270 states have internal predecessors, (592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:43:47,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 592 transitions. [2021-06-05 04:43:47,852 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 592 transitions. Word has length 20 [2021-06-05 04:43:47,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:43:47,852 INFO L482 AbstractCegarLoop]: Abstraction has 271 states and 592 transitions. [2021-06-05 04:43:47,853 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:43:47,853 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 592 transitions. [2021-06-05 04:43:47,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:43:47,853 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:43:47,853 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:43:48,053 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3836,809 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:43:48,053 INFO L430 AbstractCegarLoop]: === Iteration 815 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:43:48,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:43:48,054 INFO L82 PathProgramCache]: Analyzing trace with hash 1248091686, now seen corresponding path program 809 times [2021-06-05 04:43:48,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:43:48,054 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327166731] [2021-06-05 04:43:48,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:43:48,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:43:48,204 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 04:43:48,204 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:43:48,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327166731] [2021-06-05 04:43:48,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327166731] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:48,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968274129] [2021-06-05 04:43:48,204 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 810 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 810 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:43:48,231 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:43:48,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:43:48,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:43:48,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:43:48,372 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:48,373 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:48,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:43:48,374 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:43:48,376 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:48,377 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:48,377 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 19 treesize of output 15 [2021-06-05 04:43:48,377 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:43:48,380 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:48,380 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:48,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:43:48,381 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:43:48,383 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:48,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:43:48,384 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:43:48,439 INFO L628 ElimStorePlain]: treesize reduction 80, result has 44.4 percent of original size [2021-06-05 04:43:48,441 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:48,441 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:48,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:43:48,443 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:43:48,445 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:48,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:43:48,446 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:43:48,469 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:43:48,470 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:43:48,470 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:173, output treesize:38 [2021-06-05 04:43:48,547 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 04:43:48,547 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1968274129] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:48,547 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:43:48,547 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-06-05 04:43:48,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595337996] [2021-06-05 04:43:48,548 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 04:43:48,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:43:48,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 04:43:48,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:43:48,548 INFO L87 Difference]: Start difference. First operand 271 states and 592 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:43:48,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:43:48,969 INFO L93 Difference]: Finished difference Result 331 states and 693 transitions. [2021-06-05 04:43:48,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:43:48,969 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:43:48,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:43:48,969 INFO L225 Difference]: With dead ends: 331 [2021-06-05 04:43:48,969 INFO L226 Difference]: Without dead ends: 309 [2021-06-05 04:43:48,969 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 519.2ms TimeCoverageRelationStatistics Valid=114, Invalid=878, Unknown=0, NotChecked=0, Total=992 [2021-06-05 04:43:48,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2021-06-05 04:43:48,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 268. [2021-06-05 04:43:48,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 267 states have (on average 2.194756554307116) internal successors, (586), 267 states have internal predecessors, (586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:43:48,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 586 transitions. [2021-06-05 04:43:48,972 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 586 transitions. Word has length 20 [2021-06-05 04:43:48,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:43:48,972 INFO L482 AbstractCegarLoop]: Abstraction has 268 states and 586 transitions. [2021-06-05 04:43:48,972 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:43:48,972 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 586 transitions. [2021-06-05 04:43:48,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:43:48,972 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:43:48,972 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:43:49,172 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3837,810 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:43:49,172 INFO L430 AbstractCegarLoop]: === Iteration 816 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:43:49,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:43:49,173 INFO L82 PathProgramCache]: Analyzing trace with hash -1994877706, now seen corresponding path program 810 times [2021-06-05 04:43:49,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:43:49,173 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998692038] [2021-06-05 04:43:49,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:43:49,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:43:49,360 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 04:43:49,360 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:43:49,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998692038] [2021-06-05 04:43:49,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998692038] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:49,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219712518] [2021-06-05 04:43:49,360 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 811 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 811 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:43:49,387 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 04:43:49,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:43:49,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:43:49,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:43:49,542 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:49,542 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:49,542 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 27 treesize of output 21 [2021-06-05 04:43:49,543 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:43:49,545 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:49,545 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 27 treesize of output 21 [2021-06-05 04:43:49,546 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:43:49,569 INFO L628 ElimStorePlain]: treesize reduction 42, result has 44.0 percent of original size [2021-06-05 04:43:49,571 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:49,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 04:43:49,571 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:43:49,578 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:43:49,579 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:43:49,579 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-06-05 04:43:49,620 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 04:43:49,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1219712518] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:49,620 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:43:49,620 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 04:43:49,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252319620] [2021-06-05 04:43:49,620 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 04:43:49,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:43:49,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 04:43:49,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:43:49,620 INFO L87 Difference]: Start difference. First operand 268 states and 586 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:43:50,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:43:50,028 INFO L93 Difference]: Finished difference Result 300 states and 644 transitions. [2021-06-05 04:43:50,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 04:43:50,029 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 04:43:50,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:43:50,029 INFO L225 Difference]: With dead ends: 300 [2021-06-05 04:43:50,029 INFO L226 Difference]: Without dead ends: 287 [2021-06-05 04:43:50,029 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 486.5ms TimeCoverageRelationStatistics Valid=98, Invalid=772, Unknown=0, NotChecked=0, Total=870 [2021-06-05 04:43:50,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2021-06-05 04:43:50,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 270. [2021-06-05 04:43:50,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 269 states have (on average 2.193308550185874) internal successors, (590), 269 states have internal predecessors, (590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:43:50,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 590 transitions. [2021-06-05 04:43:50,031 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 590 transitions. Word has length 20 [2021-06-05 04:43:50,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:43:50,031 INFO L482 AbstractCegarLoop]: Abstraction has 270 states and 590 transitions. [2021-06-05 04:43:50,031 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 04:43:50,031 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 590 transitions. [2021-06-05 04:43:50,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:43:50,032 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:43:50,032 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:43:50,232 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3840,811 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:43:50,232 INFO L430 AbstractCegarLoop]: === Iteration 817 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:43:50,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:43:50,232 INFO L82 PathProgramCache]: Analyzing trace with hash -858692434, now seen corresponding path program 811 times [2021-06-05 04:43:50,232 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:43:50,232 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682805191] [2021-06-05 04:43:50,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:43:50,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:43:50,449 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 04:43:50,449 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:43:50,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682805191] [2021-06-05 04:43:50,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682805191] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:50,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [74823232] [2021-06-05 04:43:50,449 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 812 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 812 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:43:50,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:43:50,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:43:50,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:43:50,605 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:50,606 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:50,606 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 19 treesize of output 15 [2021-06-05 04:43:50,607 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:43:50,609 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:50,610 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:50,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:43:50,611 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:43:50,613 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:50,613 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:50,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:43:50,614 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:43:50,617 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:50,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:43:50,617 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:43:50,676 INFO L628 ElimStorePlain]: treesize reduction 80, result has 44.4 percent of original size [2021-06-05 04:43:50,678 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:50,679 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:50,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:43:50,680 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:43:50,682 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:50,683 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 10 treesize of output 6 [2021-06-05 04:43:50,684 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:43:50,706 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:43:50,707 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 04:43:50,707 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:173, output treesize:38 [2021-06-05 04:43:50,789 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 04:43:50,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [74823232] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:50,789 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:43:50,789 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 04:43:50,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658763052] [2021-06-05 04:43:50,789 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 04:43:50,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:43:50,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 04:43:50,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:43:50,789 INFO L87 Difference]: Start difference. First operand 270 states and 590 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:43:51,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:43:51,361 INFO L93 Difference]: Finished difference Result 326 states and 686 transitions. [2021-06-05 04:43:51,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 04:43:51,362 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 04:43:51,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:43:51,362 INFO L225 Difference]: With dead ends: 326 [2021-06-05 04:43:51,362 INFO L226 Difference]: Without dead ends: 307 [2021-06-05 04:43:51,362 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 673.2ms TimeCoverageRelationStatistics Valid=121, Invalid=935, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 04:43:51,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2021-06-05 04:43:51,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 269. [2021-06-05 04:43:51,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 268 states have (on average 2.1940298507462686) internal successors, (588), 268 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:43:51,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 588 transitions. [2021-06-05 04:43:51,364 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 588 transitions. Word has length 20 [2021-06-05 04:43:51,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:43:51,364 INFO L482 AbstractCegarLoop]: Abstraction has 269 states and 588 transitions. [2021-06-05 04:43:51,364 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 04:43:51,364 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 588 transitions. [2021-06-05 04:43:51,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:43:51,365 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:43:51,365 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:43:51,565 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 812 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3841 [2021-06-05 04:43:51,565 INFO L430 AbstractCegarLoop]: === Iteration 818 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:43:51,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:43:51,565 INFO L82 PathProgramCache]: Analyzing trace with hash 1290104102, now seen corresponding path program 812 times [2021-06-05 04:43:51,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:43:51,565 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208402138] [2021-06-05 04:43:51,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:43:51,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:43:51,769 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:43:51,770 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:43:51,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208402138] [2021-06-05 04:43:51,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208402138] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:51,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415414263] [2021-06-05 04:43:51,770 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 813 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 813 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:43:51,807 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:43:51,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:43:51,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:43:51,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:43:51,981 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:51,982 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:51,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:43:51,982 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:43:51,985 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:51,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:43:51,986 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:43:52,051 INFO L628 ElimStorePlain]: treesize reduction 88, result has 45.0 percent of original size [2021-06-05 04:43:52,054 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:52,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:43:52,055 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:43:52,080 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:43:52,082 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:52,082 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 19 treesize of output 15 [2021-06-05 04:43:52,083 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:43:52,106 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:43:52,108 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:52,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 04:43:52,110 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:43:52,131 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:43:52,132 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 04:43:52,132 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-06-05 04:43:52,215 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:43:52,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [415414263] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:52,215 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:43:52,215 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 04:43:52,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687391086] [2021-06-05 04:43:52,215 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 04:43:52,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:43:52,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 04:43:52,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:43:52,216 INFO L87 Difference]: Start difference. First operand 269 states and 588 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:43:52,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:43:52,790 INFO L93 Difference]: Finished difference Result 343 states and 724 transitions. [2021-06-05 04:43:52,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 04:43:52,791 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 04:43:52,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:43:52,791 INFO L225 Difference]: With dead ends: 343 [2021-06-05 04:43:52,791 INFO L226 Difference]: Without dead ends: 324 [2021-06-05 04:43:52,791 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 657.7ms TimeCoverageRelationStatistics Valid=123, Invalid=933, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 04:43:52,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2021-06-05 04:43:52,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 267. [2021-06-05 04:43:52,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 266 states have (on average 2.1954887218045114) internal successors, (584), 266 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:43:52,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 584 transitions. [2021-06-05 04:43:52,793 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 584 transitions. Word has length 20 [2021-06-05 04:43:52,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:43:52,794 INFO L482 AbstractCegarLoop]: Abstraction has 267 states and 584 transitions. [2021-06-05 04:43:52,794 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 04:43:52,794 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 584 transitions. [2021-06-05 04:43:52,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:43:52,794 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:43:52,794 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:43:52,994 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3844,813 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:43:52,994 INFO L430 AbstractCegarLoop]: === Iteration 819 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:43:52,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:43:52,994 INFO L82 PathProgramCache]: Analyzing trace with hash 1854925742, now seen corresponding path program 813 times [2021-06-05 04:43:52,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:43:52,995 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917315134] [2021-06-05 04:43:52,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:43:52,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:43:53,188 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 04:43:53,188 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:43:53,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917315134] [2021-06-05 04:43:53,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917315134] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:53,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971337370] [2021-06-05 04:43:53,189 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 814 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 814 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:43:53,215 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:43:53,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:43:53,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 04:43:53,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:43:53,370 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:53,371 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:53,379 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 19 treesize of output 15 [2021-06-05 04:43:53,380 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:43:53,382 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:53,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:43:53,383 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:43:53,401 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:43:53,404 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:53,404 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:53,404 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 10 treesize of output 6 [2021-06-05 04:43:53,405 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:43:53,407 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:53,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 04:43:53,409 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:43:53,426 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:43:53,427 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:43:53,427 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:71, output treesize:29 [2021-06-05 04:43:53,482 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:43:53,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [971337370] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:53,482 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:43:53,482 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 04:43:53,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255548286] [2021-06-05 04:43:53,483 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 04:43:53,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:43:53,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 04:43:53,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=492, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:43:53,483 INFO L87 Difference]: Start difference. First operand 267 states and 584 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:43:54,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:43:54,013 INFO L93 Difference]: Finished difference Result 313 states and 666 transitions. [2021-06-05 04:43:54,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:43:54,013 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 04:43:54,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:43:54,014 INFO L225 Difference]: With dead ends: 313 [2021-06-05 04:43:54,014 INFO L226 Difference]: Without dead ends: 288 [2021-06-05 04:43:54,014 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 573.9ms TimeCoverageRelationStatistics Valid=100, Invalid=892, Unknown=0, NotChecked=0, Total=992 [2021-06-05 04:43:54,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2021-06-05 04:43:54,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 269. [2021-06-05 04:43:54,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 268 states have (on average 2.1940298507462686) internal successors, (588), 268 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:43:54,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 588 transitions. [2021-06-05 04:43:54,017 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 588 transitions. Word has length 20 [2021-06-05 04:43:54,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:43:54,017 INFO L482 AbstractCegarLoop]: Abstraction has 269 states and 588 transitions. [2021-06-05 04:43:54,017 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 04:43:54,017 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 588 transitions. [2021-06-05 04:43:54,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:43:54,017 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:43:54,017 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:43:54,228 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 814 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3849 [2021-06-05 04:43:54,229 INFO L430 AbstractCegarLoop]: === Iteration 820 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:43:54,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:43:54,229 INFO L82 PathProgramCache]: Analyzing trace with hash -1578036490, now seen corresponding path program 814 times [2021-06-05 04:43:54,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:43:54,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68993258] [2021-06-05 04:43:54,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:43:54,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:43:54,444 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:43:54,445 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:43:54,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68993258] [2021-06-05 04:43:54,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68993258] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:54,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695003673] [2021-06-05 04:43:54,445 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 815 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 815 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:43:54,469 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:43:54,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:43:54,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:43:54,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:43:54,631 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:54,632 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:54,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 04:43:54,633 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:43:54,635 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:54,635 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 27 treesize of output 21 [2021-06-05 04:43:54,636 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:43:54,658 INFO L628 ElimStorePlain]: treesize reduction 42, result has 44.0 percent of original size [2021-06-05 04:43:54,660 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:54,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 04:43:54,661 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:43:54,667 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:43:54,668 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 04:43:54,668 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-06-05 04:43:54,708 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:43:54,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1695003673] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:54,709 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:43:54,709 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 04:43:54,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173336003] [2021-06-05 04:43:54,709 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 04:43:54,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:43:54,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 04:43:54,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:43:54,709 INFO L87 Difference]: Start difference. First operand 269 states and 588 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:43:55,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:43:55,215 INFO L93 Difference]: Finished difference Result 297 states and 635 transitions. [2021-06-05 04:43:55,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:43:55,215 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 04:43:55,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:43:55,216 INFO L225 Difference]: With dead ends: 297 [2021-06-05 04:43:55,216 INFO L226 Difference]: Without dead ends: 284 [2021-06-05 04:43:55,216 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 607.3ms TimeCoverageRelationStatistics Valid=107, Invalid=885, Unknown=0, NotChecked=0, Total=992 [2021-06-05 04:43:55,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2021-06-05 04:43:55,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 270. [2021-06-05 04:43:55,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 269 states have (on average 2.193308550185874) internal successors, (590), 269 states have internal predecessors, (590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:43:55,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 590 transitions. [2021-06-05 04:43:55,218 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 590 transitions. Word has length 20 [2021-06-05 04:43:55,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:43:55,218 INFO L482 AbstractCegarLoop]: Abstraction has 270 states and 590 transitions. [2021-06-05 04:43:55,218 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 04:43:55,218 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 590 transitions. [2021-06-05 04:43:55,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:43:55,218 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:43:55,218 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:43:55,419 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3852,815 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:43:55,419 INFO L430 AbstractCegarLoop]: === Iteration 821 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:43:55,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:43:55,419 INFO L82 PathProgramCache]: Analyzing trace with hash -441851218, now seen corresponding path program 815 times [2021-06-05 04:43:55,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:43:55,419 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536975000] [2021-06-05 04:43:55,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:43:55,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:43:55,637 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 04:43:55,637 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:43:55,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536975000] [2021-06-05 04:43:55,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536975000] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:55,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1621703308] [2021-06-05 04:43:55,638 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 816 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 816 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:43:55,663 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:43:55,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:43:55,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:43:55,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:43:55,806 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:55,807 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:55,807 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 19 treesize of output 15 [2021-06-05 04:43:55,808 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:43:55,810 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:55,811 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:55,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:43:55,812 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:43:55,814 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:55,814 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:55,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:43:55,815 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:43:55,818 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:55,818 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 19 treesize of output 15 [2021-06-05 04:43:55,818 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:43:55,874 INFO L628 ElimStorePlain]: treesize reduction 83, result has 45.8 percent of original size [2021-06-05 04:43:55,876 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:55,877 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:55,877 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 13 treesize of output 9 [2021-06-05 04:43:55,878 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:43:55,880 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:55,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 04:43:55,882 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:43:55,905 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:43:55,906 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 04:43:55,906 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:173, output treesize:38 [2021-06-05 04:43:55,987 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:43:55,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1621703308] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:55,988 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:43:55,988 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 04:43:55,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300410907] [2021-06-05 04:43:55,988 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 04:43:55,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:43:55,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 04:43:55,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:43:55,988 INFO L87 Difference]: Start difference. First operand 270 states and 590 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:43:56,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:43:56,739 INFO L93 Difference]: Finished difference Result 330 states and 691 transitions. [2021-06-05 04:43:56,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 04:43:56,739 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 04:43:56,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:43:56,740 INFO L225 Difference]: With dead ends: 330 [2021-06-05 04:43:56,740 INFO L226 Difference]: Without dead ends: 308 [2021-06-05 04:43:56,740 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 807.5ms TimeCoverageRelationStatistics Valid=134, Invalid=1126, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 04:43:56,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2021-06-05 04:43:56,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 268. [2021-06-05 04:43:56,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 267 states have (on average 2.194756554307116) internal successors, (586), 267 states have internal predecessors, (586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:43:56,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 586 transitions. [2021-06-05 04:43:56,742 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 586 transitions. Word has length 20 [2021-06-05 04:43:56,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:43:56,742 INFO L482 AbstractCegarLoop]: Abstraction has 268 states and 586 transitions. [2021-06-05 04:43:56,742 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 04:43:56,742 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 586 transitions. [2021-06-05 04:43:56,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:43:56,742 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:43:56,742 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:43:56,942 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3853,816 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:43:56,943 INFO L430 AbstractCegarLoop]: === Iteration 822 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:43:56,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:43:56,943 INFO L82 PathProgramCache]: Analyzing trace with hash 610146686, now seen corresponding path program 816 times [2021-06-05 04:43:56,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:43:56,943 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819452491] [2021-06-05 04:43:56,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:43:56,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:43:57,131 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:43:57,131 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:43:57,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819452491] [2021-06-05 04:43:57,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819452491] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:57,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132894395] [2021-06-05 04:43:57,131 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 817 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 817 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:43:57,157 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 04:43:57,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:43:57,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:43:57,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:43:57,308 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:57,308 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:57,308 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 27 treesize of output 21 [2021-06-05 04:43:57,309 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:43:57,311 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:57,311 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 27 treesize of output 21 [2021-06-05 04:43:57,312 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:43:57,334 INFO L628 ElimStorePlain]: treesize reduction 36, result has 42.9 percent of original size [2021-06-05 04:43:57,336 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:57,336 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 10 treesize of output 6 [2021-06-05 04:43:57,337 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:43:57,344 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:43:57,345 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 04:43:57,345 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-06-05 04:43:57,385 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:43:57,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1132894395] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:57,385 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:43:57,385 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 04:43:57,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155629347] [2021-06-05 04:43:57,385 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 04:43:57,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:43:57,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 04:43:57,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:43:57,385 INFO L87 Difference]: Start difference. First operand 268 states and 586 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:43:57,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:43:57,748 INFO L93 Difference]: Finished difference Result 296 states and 636 transitions. [2021-06-05 04:43:57,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:43:57,748 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 04:43:57,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:43:57,748 INFO L225 Difference]: With dead ends: 296 [2021-06-05 04:43:57,748 INFO L226 Difference]: Without dead ends: 283 [2021-06-05 04:43:57,748 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 500.8ms TimeCoverageRelationStatistics Valid=103, Invalid=767, Unknown=0, NotChecked=0, Total=870 [2021-06-05 04:43:57,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2021-06-05 04:43:57,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 270. [2021-06-05 04:43:57,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 269 states have (on average 2.193308550185874) internal successors, (590), 269 states have internal predecessors, (590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:43:57,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 590 transitions. [2021-06-05 04:43:57,750 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 590 transitions. Word has length 20 [2021-06-05 04:43:57,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:43:57,750 INFO L482 AbstractCegarLoop]: Abstraction has 270 states and 590 transitions. [2021-06-05 04:43:57,750 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 04:43:57,750 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 590 transitions. [2021-06-05 04:43:57,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:43:57,751 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:43:57,751 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:43:57,951 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3856,817 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:43:57,951 INFO L430 AbstractCegarLoop]: === Iteration 823 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:43:57,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:43:57,951 INFO L82 PathProgramCache]: Analyzing trace with hash 1746331958, now seen corresponding path program 817 times [2021-06-05 04:43:57,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:43:57,951 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745926637] [2021-06-05 04:43:57,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:43:57,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:43:58,180 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:43:58,180 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:43:58,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745926637] [2021-06-05 04:43:58,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745926637] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:58,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [425616247] [2021-06-05 04:43:58,180 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 818 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 818 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:43:58,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:43:58,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:43:58,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:43:58,335 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:58,336 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:58,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:43:58,337 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:43:58,339 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:58,339 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:58,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:43:58,340 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:43:58,343 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:58,343 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:58,343 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 19 treesize of output 15 [2021-06-05 04:43:58,344 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:43:58,346 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:58,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:43:58,347 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:43:58,403 INFO L628 ElimStorePlain]: treesize reduction 83, result has 45.8 percent of original size [2021-06-05 04:43:58,406 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:58,406 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:58,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 04:43:58,407 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:43:58,410 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:58,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 04:43:58,411 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:43:58,435 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:43:58,437 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 04:43:58,437 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:173, output treesize:38 [2021-06-05 04:43:58,518 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 04:43:58,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [425616247] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:58,519 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:43:58,519 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 04:43:58,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522916595] [2021-06-05 04:43:58,519 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 04:43:58,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:43:58,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 04:43:58,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=483, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:43:58,519 INFO L87 Difference]: Start difference. First operand 270 states and 590 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:43:59,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:43:59,085 INFO L93 Difference]: Finished difference Result 319 states and 672 transitions. [2021-06-05 04:43:59,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:43:59,085 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 04:43:59,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:43:59,085 INFO L225 Difference]: With dead ends: 319 [2021-06-05 04:43:59,085 INFO L226 Difference]: Without dead ends: 300 [2021-06-05 04:43:59,086 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 734.5ms TimeCoverageRelationStatistics Valid=133, Invalid=989, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 04:43:59,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2021-06-05 04:43:59,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 269. [2021-06-05 04:43:59,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 268 states have (on average 2.1940298507462686) internal successors, (588), 268 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:43:59,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 588 transitions. [2021-06-05 04:43:59,088 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 588 transitions. Word has length 20 [2021-06-05 04:43:59,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:43:59,088 INFO L482 AbstractCegarLoop]: Abstraction has 269 states and 588 transitions. [2021-06-05 04:43:59,088 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 04:43:59,088 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 588 transitions. [2021-06-05 04:43:59,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:43:59,088 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:43:59,088 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:43:59,288 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 818 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3857 [2021-06-05 04:43:59,288 INFO L430 AbstractCegarLoop]: === Iteration 824 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:43:59,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:43:59,289 INFO L82 PathProgramCache]: Analyzing trace with hash -399838802, now seen corresponding path program 818 times [2021-06-05 04:43:59,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:43:59,289 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645721215] [2021-06-05 04:43:59,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:43:59,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:43:59,508 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:43:59,508 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:43:59,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645721215] [2021-06-05 04:43:59,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645721215] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:59,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059711726] [2021-06-05 04:43:59,508 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 819 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 819 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:43:59,534 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:43:59,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:43:59,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:43:59,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:43:59,677 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:59,677 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:59,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:43:59,678 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:43:59,681 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:59,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:43:59,682 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:43:59,744 INFO L628 ElimStorePlain]: treesize reduction 88, result has 46.0 percent of original size [2021-06-05 04:43:59,747 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:59,747 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 13 treesize of output 9 [2021-06-05 04:43:59,748 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:43:59,772 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:43:59,775 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:59,775 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 19 treesize of output 15 [2021-06-05 04:43:59,776 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:43:59,797 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:43:59,800 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:43:59,800 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 13 treesize of output 9 [2021-06-05 04:43:59,801 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:43:59,822 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:43:59,823 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 04:43:59,823 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-06-05 04:43:59,904 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:43:59,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1059711726] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:59,904 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:43:59,904 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 04:43:59,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482441611] [2021-06-05 04:43:59,904 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 04:43:59,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:43:59,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 04:43:59,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=483, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:43:59,905 INFO L87 Difference]: Start difference. First operand 269 states and 588 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:00,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:44:00,356 INFO L93 Difference]: Finished difference Result 339 states and 716 transitions. [2021-06-05 04:44:00,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 04:44:00,356 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 04:44:00,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:44:00,356 INFO L225 Difference]: With dead ends: 339 [2021-06-05 04:44:00,357 INFO L226 Difference]: Without dead ends: 320 [2021-06-05 04:44:00,357 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 632.3ms TimeCoverageRelationStatistics Valid=124, Invalid=868, Unknown=0, NotChecked=0, Total=992 [2021-06-05 04:44:00,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2021-06-05 04:44:00,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 267. [2021-06-05 04:44:00,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 266 states have (on average 2.1954887218045114) internal successors, (584), 266 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:00,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 584 transitions. [2021-06-05 04:44:00,359 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 584 transitions. Word has length 20 [2021-06-05 04:44:00,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:44:00,359 INFO L482 AbstractCegarLoop]: Abstraction has 267 states and 584 transitions. [2021-06-05 04:44:00,359 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 04:44:00,359 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 584 transitions. [2021-06-05 04:44:00,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:44:00,359 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:44:00,359 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:44:00,559 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3860,819 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:44:00,560 INFO L430 AbstractCegarLoop]: === Iteration 825 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:44:00,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:44:00,560 INFO L82 PathProgramCache]: Analyzing trace with hash -275651594, now seen corresponding path program 819 times [2021-06-05 04:44:00,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:44:00,560 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746549427] [2021-06-05 04:44:00,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:44:00,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:44:00,720 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:44:00,720 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:44:00,720 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746549427] [2021-06-05 04:44:00,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746549427] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:00,720 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636799623] [2021-06-05 04:44:00,720 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 820 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 820 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:44:00,747 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 04:44:00,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:44:00,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 04:44:00,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:44:00,885 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:00,885 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:00,885 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 19 treesize of output 15 [2021-06-05 04:44:00,886 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:44:00,888 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:00,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:44:00,889 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:44:00,908 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:44:00,910 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:00,910 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:00,910 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 13 treesize of output 9 [2021-06-05 04:44:00,912 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:44:00,913 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:00,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 04:44:00,915 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:44:00,932 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:44:00,933 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 04:44:00,933 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:71, output treesize:29 [2021-06-05 04:44:00,984 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 04:44:00,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [636799623] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:00,985 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:44:00,985 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 04:44:00,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172977331] [2021-06-05 04:44:00,985 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 04:44:00,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:44:00,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 04:44:00,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:44:00,985 INFO L87 Difference]: Start difference. First operand 267 states and 584 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:01,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:44:01,411 INFO L93 Difference]: Finished difference Result 301 states and 646 transitions. [2021-06-05 04:44:01,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:44:01,411 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 04:44:01,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:44:01,411 INFO L225 Difference]: With dead ends: 301 [2021-06-05 04:44:01,411 INFO L226 Difference]: Without dead ends: 288 [2021-06-05 04:44:01,411 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 471.0ms TimeCoverageRelationStatistics Valid=100, Invalid=770, Unknown=0, NotChecked=0, Total=870 [2021-06-05 04:44:01,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2021-06-05 04:44:01,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 270. [2021-06-05 04:44:01,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 269 states have (on average 2.193308550185874) internal successors, (590), 269 states have internal predecessors, (590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:01,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 590 transitions. [2021-06-05 04:44:01,413 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 590 transitions. Word has length 20 [2021-06-05 04:44:01,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:44:01,413 INFO L482 AbstractCegarLoop]: Abstraction has 270 states and 590 transitions. [2021-06-05 04:44:01,413 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 04:44:01,413 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 590 transitions. [2021-06-05 04:44:01,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:44:01,414 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:44:01,414 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:44:01,614 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3865,820 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:44:01,614 INFO L430 AbstractCegarLoop]: === Iteration 826 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:44:01,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:44:01,614 INFO L82 PathProgramCache]: Analyzing trace with hash 860533678, now seen corresponding path program 820 times [2021-06-05 04:44:01,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:44:01,614 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734163118] [2021-06-05 04:44:01,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:44:01,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:44:01,850 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 04:44:01,850 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:44:01,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734163118] [2021-06-05 04:44:01,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734163118] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:01,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320848839] [2021-06-05 04:44:01,851 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 821 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 821 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:44:01,875 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:44:01,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:44:01,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:44:01,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:44:02,001 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:02,002 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:02,002 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 19 treesize of output 15 [2021-06-05 04:44:02,003 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:44:02,005 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:02,006 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:02,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:44:02,006 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:44:02,009 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:02,009 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:02,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:44:02,010 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:44:02,012 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:02,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:44:02,013 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:44:02,066 INFO L628 ElimStorePlain]: treesize reduction 83, result has 44.7 percent of original size [2021-06-05 04:44:02,068 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:02,069 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:02,069 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 13 treesize of output 9 [2021-06-05 04:44:02,070 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:44:02,072 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:02,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:44:02,074 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:44:02,096 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:44:02,097 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 04:44:02,098 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:173, output treesize:38 [2021-06-05 04:44:02,177 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:44:02,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1320848839] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:02,177 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:44:02,177 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 04:44:02,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512794368] [2021-06-05 04:44:02,177 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 04:44:02,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:44:02,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 04:44:02,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=483, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:44:02,178 INFO L87 Difference]: Start difference. First operand 270 states and 590 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:02,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:44:02,708 INFO L93 Difference]: Finished difference Result 326 states and 686 transitions. [2021-06-05 04:44:02,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 04:44:02,709 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 04:44:02,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:44:02,709 INFO L225 Difference]: With dead ends: 326 [2021-06-05 04:44:02,709 INFO L226 Difference]: Without dead ends: 307 [2021-06-05 04:44:02,709 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 664.9ms TimeCoverageRelationStatistics Valid=121, Invalid=871, Unknown=0, NotChecked=0, Total=992 [2021-06-05 04:44:02,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2021-06-05 04:44:02,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 269. [2021-06-05 04:44:02,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 268 states have (on average 2.1940298507462686) internal successors, (588), 268 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:02,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 588 transitions. [2021-06-05 04:44:02,712 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 588 transitions. Word has length 20 [2021-06-05 04:44:02,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:44:02,712 INFO L482 AbstractCegarLoop]: Abstraction has 269 states and 588 transitions. [2021-06-05 04:44:02,712 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 04:44:02,712 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 588 transitions. [2021-06-05 04:44:02,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:44:02,712 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:44:02,712 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:44:02,912 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 821 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3868 [2021-06-05 04:44:02,913 INFO L430 AbstractCegarLoop]: === Iteration 827 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:44:02,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:44:02,913 INFO L82 PathProgramCache]: Analyzing trace with hash -1285637082, now seen corresponding path program 821 times [2021-06-05 04:44:02,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:44:02,913 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463837570] [2021-06-05 04:44:02,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:44:02,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:44:03,132 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:44:03,133 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:44:03,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463837570] [2021-06-05 04:44:03,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463837570] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:03,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114819443] [2021-06-05 04:44:03,133 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 822 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 822 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:44:03,159 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 04:44:03,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:44:03,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:44:03,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:44:03,303 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:03,304 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:03,304 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 19 treesize of output 15 [2021-06-05 04:44:03,304 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:44:03,307 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:03,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:44:03,308 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:44:03,369 INFO L628 ElimStorePlain]: treesize reduction 85, result has 45.9 percent of original size [2021-06-05 04:44:03,372 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:03,372 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 10 treesize of output 6 [2021-06-05 04:44:03,373 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:44:03,397 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:44:03,399 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:03,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:44:03,400 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:44:03,422 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:44:03,425 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:03,425 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 10 treesize of output 6 [2021-06-05 04:44:03,426 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:44:03,447 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:44:03,448 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 04:44:03,448 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-06-05 04:44:03,529 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 04:44:03,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1114819443] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:03,529 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:44:03,529 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 04:44:03,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771065586] [2021-06-05 04:44:03,530 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 04:44:03,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:44:03,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 04:44:03,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=483, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:44:03,530 INFO L87 Difference]: Start difference. First operand 269 states and 588 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:04,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:44:04,279 INFO L93 Difference]: Finished difference Result 341 states and 719 transitions. [2021-06-05 04:44:04,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 04:44:04,279 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 04:44:04,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:44:04,279 INFO L225 Difference]: With dead ends: 341 [2021-06-05 04:44:04,279 INFO L226 Difference]: Without dead ends: 319 [2021-06-05 04:44:04,279 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 825.8ms TimeCoverageRelationStatistics Valid=150, Invalid=1110, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 04:44:04,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2021-06-05 04:44:04,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 273. [2021-06-05 04:44:04,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 272 states have (on average 2.1948529411764706) internal successors, (597), 272 states have internal predecessors, (597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:04,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 597 transitions. [2021-06-05 04:44:04,282 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 597 transitions. Word has length 20 [2021-06-05 04:44:04,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:44:04,282 INFO L482 AbstractCegarLoop]: Abstraction has 273 states and 597 transitions. [2021-06-05 04:44:04,282 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 04:44:04,282 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 597 transitions. [2021-06-05 04:44:04,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:44:04,282 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:44:04,282 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:44:04,482 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3871,822 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:44:04,482 INFO L430 AbstractCegarLoop]: === Iteration 828 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:44:04,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:44:04,483 INFO L82 PathProgramCache]: Analyzing trace with hash 902546094, now seen corresponding path program 822 times [2021-06-05 04:44:04,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:44:04,483 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758494303] [2021-06-05 04:44:04,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:44:04,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:44:04,713 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:44:04,713 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:44:04,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758494303] [2021-06-05 04:44:04,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758494303] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:04,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039601706] [2021-06-05 04:44:04,713 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 823 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 823 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:44:04,739 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 04:44:04,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:44:04,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 04:44:04,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:44:04,920 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:04,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:44:04,921 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:44:04,942 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:44:04,945 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:04,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 04:44:04,946 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:44:04,967 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:44:04,969 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:04,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:44:04,970 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:44:04,990 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:44:04,992 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:04,992 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 13 treesize of output 9 [2021-06-05 04:44:04,993 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:44:05,011 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:44:05,012 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 04:44:05,013 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:77, output treesize:35 [2021-06-05 04:44:05,106 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:44:05,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2039601706] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:05,107 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:44:05,107 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 04:44:05,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559093135] [2021-06-05 04:44:05,107 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 04:44:05,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:44:05,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 04:44:05,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:44:05,107 INFO L87 Difference]: Start difference. First operand 273 states and 597 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:05,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:44:05,669 INFO L93 Difference]: Finished difference Result 322 states and 686 transitions. [2021-06-05 04:44:05,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 04:44:05,670 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 04:44:05,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:44:05,670 INFO L225 Difference]: With dead ends: 322 [2021-06-05 04:44:05,670 INFO L226 Difference]: Without dead ends: 308 [2021-06-05 04:44:05,670 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 683.4ms TimeCoverageRelationStatistics Valid=114, Invalid=878, Unknown=0, NotChecked=0, Total=992 [2021-06-05 04:44:05,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2021-06-05 04:44:05,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 273. [2021-06-05 04:44:05,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 272 states have (on average 2.1948529411764706) internal successors, (597), 272 states have internal predecessors, (597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:05,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 597 transitions. [2021-06-05 04:44:05,672 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 597 transitions. Word has length 20 [2021-06-05 04:44:05,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:44:05,672 INFO L482 AbstractCegarLoop]: Abstraction has 273 states and 597 transitions. [2021-06-05 04:44:05,672 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 04:44:05,672 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 597 transitions. [2021-06-05 04:44:05,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:44:05,673 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:44:05,673 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:44:05,873 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3876,823 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:44:05,873 INFO L430 AbstractCegarLoop]: === Iteration 829 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:44:05,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:44:05,873 INFO L82 PathProgramCache]: Analyzing trace with hash 1006303270, now seen corresponding path program 823 times [2021-06-05 04:44:05,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:44:05,873 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891365924] [2021-06-05 04:44:05,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:44:05,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:44:06,051 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 04:44:06,051 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:44:06,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891365924] [2021-06-05 04:44:06,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891365924] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:06,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266186313] [2021-06-05 04:44:06,051 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 824 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 824 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:44:06,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:44:06,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:44:06,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:44:06,235 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:06,236 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:06,236 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 27 treesize of output 21 [2021-06-05 04:44:06,237 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:44:06,239 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:06,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 04:44:06,239 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:44:06,262 INFO L628 ElimStorePlain]: treesize reduction 36, result has 42.9 percent of original size [2021-06-05 04:44:06,263 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:06,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:44:06,265 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:44:06,271 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:44:06,272 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 04:44:06,272 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-06-05 04:44:06,314 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 04:44:06,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1266186313] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:06,314 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:44:06,314 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 04:44:06,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530014980] [2021-06-05 04:44:06,314 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 04:44:06,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:44:06,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 04:44:06,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:44:06,315 INFO L87 Difference]: Start difference. First operand 273 states and 597 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:06,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:44:06,703 INFO L93 Difference]: Finished difference Result 302 states and 645 transitions. [2021-06-05 04:44:06,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:44:06,703 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 04:44:06,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:44:06,704 INFO L225 Difference]: With dead ends: 302 [2021-06-05 04:44:06,704 INFO L226 Difference]: Without dead ends: 286 [2021-06-05 04:44:06,704 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 465.1ms TimeCoverageRelationStatistics Valid=90, Invalid=780, Unknown=0, NotChecked=0, Total=870 [2021-06-05 04:44:06,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2021-06-05 04:44:06,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 276. [2021-06-05 04:44:06,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 275 states have (on average 2.192727272727273) internal successors, (603), 275 states have internal predecessors, (603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:06,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 603 transitions. [2021-06-05 04:44:06,706 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 603 transitions. Word has length 20 [2021-06-05 04:44:06,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:44:06,706 INFO L482 AbstractCegarLoop]: Abstraction has 276 states and 603 transitions. [2021-06-05 04:44:06,706 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 04:44:06,706 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 603 transitions. [2021-06-05 04:44:06,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:44:06,706 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:44:06,706 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:44:06,907 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3883,824 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:44:06,907 INFO L430 AbstractCegarLoop]: === Iteration 830 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:44:06,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:44:06,907 INFO L82 PathProgramCache]: Analyzing trace with hash 1868308334, now seen corresponding path program 824 times [2021-06-05 04:44:06,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:44:06,907 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12359497] [2021-06-05 04:44:06,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:44:06,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:44:07,096 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 04:44:07,096 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:44:07,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12359497] [2021-06-05 04:44:07,096 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12359497] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:07,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132589084] [2021-06-05 04:44:07,096 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 825 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 825 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:44:07,122 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:44:07,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:44:07,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:44:07,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:44:07,289 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:07,289 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:07,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 04:44:07,290 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:44:07,292 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:07,292 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 27 treesize of output 21 [2021-06-05 04:44:07,293 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:44:07,315 INFO L628 ElimStorePlain]: treesize reduction 36, result has 42.9 percent of original size [2021-06-05 04:44:07,317 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:07,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:44:07,319 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:44:07,325 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:44:07,326 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 04:44:07,326 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-06-05 04:44:07,368 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 04:44:07,368 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1132589084] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:07,368 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:44:07,368 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 04:44:07,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978571562] [2021-06-05 04:44:07,368 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 04:44:07,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:44:07,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 04:44:07,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:44:07,368 INFO L87 Difference]: Start difference. First operand 276 states and 603 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:07,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:44:07,901 INFO L93 Difference]: Finished difference Result 310 states and 666 transitions. [2021-06-05 04:44:07,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 04:44:07,901 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 04:44:07,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:44:07,902 INFO L225 Difference]: With dead ends: 310 [2021-06-05 04:44:07,902 INFO L226 Difference]: Without dead ends: 297 [2021-06-05 04:44:07,902 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 605.9ms TimeCoverageRelationStatistics Valid=107, Invalid=949, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 04:44:07,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2021-06-05 04:44:07,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 277. [2021-06-05 04:44:07,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 276 states have (on average 2.1920289855072466) internal successors, (605), 276 states have internal predecessors, (605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:07,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 605 transitions. [2021-06-05 04:44:07,904 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 605 transitions. Word has length 20 [2021-06-05 04:44:07,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:44:07,904 INFO L482 AbstractCegarLoop]: Abstraction has 277 states and 605 transitions. [2021-06-05 04:44:07,904 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 04:44:07,904 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 605 transitions. [2021-06-05 04:44:07,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:44:07,904 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:44:07,905 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:44:08,105 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3884,825 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:44:08,105 INFO L430 AbstractCegarLoop]: === Iteration 831 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:44:08,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:44:08,105 INFO L82 PathProgramCache]: Analyzing trace with hash -1290473690, now seen corresponding path program 825 times [2021-06-05 04:44:08,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:44:08,105 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142626942] [2021-06-05 04:44:08,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:44:08,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:44:08,252 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 04:44:08,252 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:44:08,252 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142626942] [2021-06-05 04:44:08,252 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142626942] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:08,252 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606639240] [2021-06-05 04:44:08,252 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 826 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 826 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:44:08,285 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 04:44:08,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:44:08,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 04:44:08,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:44:08,407 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:08,408 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:08,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:44:08,409 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:44:08,411 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:08,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:44:08,411 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:44:08,433 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:44:08,435 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:08,435 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:08,436 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 13 treesize of output 9 [2021-06-05 04:44:08,437 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:44:08,439 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:08,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:44:08,440 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:44:08,461 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:44:08,462 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 04:44:08,462 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:35 [2021-06-05 04:44:08,546 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 04:44:08,547 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1606639240] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:08,547 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:44:08,547 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-06-05 04:44:08,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713821155] [2021-06-05 04:44:08,547 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 04:44:08,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:44:08,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 04:44:08,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:44:08,547 INFO L87 Difference]: Start difference. First operand 277 states and 605 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:09,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:44:09,058 INFO L93 Difference]: Finished difference Result 312 states and 672 transitions. [2021-06-05 04:44:09,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 04:44:09,058 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:44:09,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:44:09,059 INFO L225 Difference]: With dead ends: 312 [2021-06-05 04:44:09,059 INFO L226 Difference]: Without dead ends: 305 [2021-06-05 04:44:09,059 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 529.8ms TimeCoverageRelationStatistics Valid=119, Invalid=937, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 04:44:09,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2021-06-05 04:44:09,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 275. [2021-06-05 04:44:09,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 274 states have (on average 2.1934306569343067) internal successors, (601), 274 states have internal predecessors, (601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:09,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 601 transitions. [2021-06-05 04:44:09,061 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 601 transitions. Word has length 20 [2021-06-05 04:44:09,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:44:09,061 INFO L482 AbstractCegarLoop]: Abstraction has 275 states and 601 transitions. [2021-06-05 04:44:09,061 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:09,061 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 601 transitions. [2021-06-05 04:44:09,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:44:09,061 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:44:09,061 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:44:09,262 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3885,826 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:44:09,262 INFO L430 AbstractCegarLoop]: === Iteration 832 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:44:09,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:44:09,262 INFO L82 PathProgramCache]: Analyzing trace with hash -238475786, now seen corresponding path program 826 times [2021-06-05 04:44:09,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:44:09,262 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135198903] [2021-06-05 04:44:09,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:44:09,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:44:09,470 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 04:44:09,470 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:44:09,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135198903] [2021-06-05 04:44:09,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135198903] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:09,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155787567] [2021-06-05 04:44:09,471 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 827 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 827 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:44:09,496 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:44:09,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:44:09,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:44:09,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:44:09,647 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:09,648 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:09,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 04:44:09,649 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:44:09,651 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:09,651 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 27 treesize of output 21 [2021-06-05 04:44:09,652 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:44:09,674 INFO L628 ElimStorePlain]: treesize reduction 36, result has 42.9 percent of original size [2021-06-05 04:44:09,676 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:09,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:44:09,678 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:44:09,684 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:44:09,685 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:44:09,685 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-06-05 04:44:09,724 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 04:44:09,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [155787567] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:09,724 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:44:09,724 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 04:44:09,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353672153] [2021-06-05 04:44:09,724 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 04:44:09,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:44:09,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 04:44:09,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:44:09,724 INFO L87 Difference]: Start difference. First operand 275 states and 601 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:10,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:44:10,056 INFO L93 Difference]: Finished difference Result 300 states and 642 transitions. [2021-06-05 04:44:10,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:44:10,057 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 04:44:10,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:44:10,057 INFO L225 Difference]: With dead ends: 300 [2021-06-05 04:44:10,057 INFO L226 Difference]: Without dead ends: 287 [2021-06-05 04:44:10,057 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 482.2ms TimeCoverageRelationStatistics Valid=95, Invalid=717, Unknown=0, NotChecked=0, Total=812 [2021-06-05 04:44:10,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2021-06-05 04:44:10,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 277. [2021-06-05 04:44:10,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 276 states have (on average 2.1920289855072466) internal successors, (605), 276 states have internal predecessors, (605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:10,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 605 transitions. [2021-06-05 04:44:10,059 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 605 transitions. Word has length 20 [2021-06-05 04:44:10,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:44:10,059 INFO L482 AbstractCegarLoop]: Abstraction has 277 states and 605 transitions. [2021-06-05 04:44:10,059 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 04:44:10,059 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 605 transitions. [2021-06-05 04:44:10,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:44:10,060 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:44:10,060 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:44:10,260 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3890,827 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:44:10,260 INFO L430 AbstractCegarLoop]: === Iteration 833 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:44:10,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:44:10,260 INFO L82 PathProgramCache]: Analyzing trace with hash 897709486, now seen corresponding path program 827 times [2021-06-05 04:44:10,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:44:10,260 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481682297] [2021-06-05 04:44:10,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:44:10,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:44:10,455 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:44:10,456 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:44:10,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481682297] [2021-06-05 04:44:10,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481682297] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:10,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484904645] [2021-06-05 04:44:10,456 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 828 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 828 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:44:10,482 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 04:44:10,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:44:10,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:44:10,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:44:10,608 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:10,608 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:10,609 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 19 treesize of output 15 [2021-06-05 04:44:10,609 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:44:10,612 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:10,612 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:10,612 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 19 treesize of output 15 [2021-06-05 04:44:10,613 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:44:10,615 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:10,616 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:10,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:44:10,617 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:44:10,619 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:10,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:44:10,620 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:44:10,674 INFO L628 ElimStorePlain]: treesize reduction 77, result has 45.4 percent of original size [2021-06-05 04:44:10,676 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:10,677 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:10,677 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 10 treesize of output 6 [2021-06-05 04:44:10,678 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:44:10,680 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:10,681 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 10 treesize of output 6 [2021-06-05 04:44:10,682 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:44:10,704 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:44:10,705 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 04:44:10,705 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:173, output treesize:38 [2021-06-05 04:44:10,781 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 04:44:10,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [484904645] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:10,781 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:44:10,781 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-06-05 04:44:10,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891739625] [2021-06-05 04:44:10,781 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 04:44:10,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:44:10,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 04:44:10,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:44:10,782 INFO L87 Difference]: Start difference. First operand 277 states and 605 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:11,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:44:11,472 INFO L93 Difference]: Finished difference Result 365 states and 751 transitions. [2021-06-05 04:44:11,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 04:44:11,472 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:44:11,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:44:11,473 INFO L225 Difference]: With dead ends: 365 [2021-06-05 04:44:11,473 INFO L226 Difference]: Without dead ends: 336 [2021-06-05 04:44:11,473 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 820.5ms TimeCoverageRelationStatistics Valid=153, Invalid=1179, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 04:44:11,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2021-06-05 04:44:11,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 282. [2021-06-05 04:44:11,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 281 states have (on average 2.188612099644128) internal successors, (615), 281 states have internal predecessors, (615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:11,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 615 transitions. [2021-06-05 04:44:11,475 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 615 transitions. Word has length 20 [2021-06-05 04:44:11,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:44:11,475 INFO L482 AbstractCegarLoop]: Abstraction has 282 states and 615 transitions. [2021-06-05 04:44:11,475 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:11,475 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 615 transitions. [2021-06-05 04:44:11,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:44:11,475 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:44:11,475 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:44:11,676 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 828 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3891 [2021-06-05 04:44:11,676 INFO L430 AbstractCegarLoop]: === Iteration 834 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:44:11,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:44:11,676 INFO L82 PathProgramCache]: Analyzing trace with hash -1248461274, now seen corresponding path program 828 times [2021-06-05 04:44:11,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:44:11,676 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903969722] [2021-06-05 04:44:11,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:44:11,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:44:11,843 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 04:44:11,843 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:44:11,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903969722] [2021-06-05 04:44:11,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903969722] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:11,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2070358295] [2021-06-05 04:44:11,843 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 829 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 829 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:44:11,869 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 04:44:11,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:44:11,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 04:44:11,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:44:11,986 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:11,987 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:11,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:44:11,987 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:44:11,989 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:11,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:44:11,990 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:44:12,013 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:44:12,015 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:12,015 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:12,015 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 10 treesize of output 6 [2021-06-05 04:44:12,016 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:44:12,018 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:12,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:44:12,020 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:44:12,040 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:44:12,041 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 04:44:12,041 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:35 [2021-06-05 04:44:12,114 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 04:44:12,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2070358295] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:12,114 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:44:12,114 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 04:44:12,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180144919] [2021-06-05 04:44:12,115 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 04:44:12,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:44:12,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 04:44:12,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:44:12,115 INFO L87 Difference]: Start difference. First operand 282 states and 615 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:12,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:44:12,544 INFO L93 Difference]: Finished difference Result 316 states and 680 transitions. [2021-06-05 04:44:12,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 04:44:12,544 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:44:12,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:44:12,544 INFO L225 Difference]: With dead ends: 316 [2021-06-05 04:44:12,544 INFO L226 Difference]: Without dead ends: 309 [2021-06-05 04:44:12,545 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 481.0ms TimeCoverageRelationStatistics Valid=118, Invalid=874, Unknown=0, NotChecked=0, Total=992 [2021-06-05 04:44:12,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2021-06-05 04:44:12,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 282. [2021-06-05 04:44:12,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 281 states have (on average 2.188612099644128) internal successors, (615), 281 states have internal predecessors, (615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:12,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 615 transitions. [2021-06-05 04:44:12,547 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 615 transitions. Word has length 20 [2021-06-05 04:44:12,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:44:12,547 INFO L482 AbstractCegarLoop]: Abstraction has 282 states and 615 transitions. [2021-06-05 04:44:12,547 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 04:44:12,547 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 615 transitions. [2021-06-05 04:44:12,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:44:12,547 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:44:12,547 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:44:12,747 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3894,829 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:44:12,747 INFO L430 AbstractCegarLoop]: === Iteration 835 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:44:12,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:44:12,748 INFO L82 PathProgramCache]: Analyzing trace with hash -1124274066, now seen corresponding path program 829 times [2021-06-05 04:44:12,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:44:12,748 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331360298] [2021-06-05 04:44:12,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:44:12,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:44:12,932 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:44:12,932 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:44:12,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331360298] [2021-06-05 04:44:12,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331360298] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:12,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082008796] [2021-06-05 04:44:12,933 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 830 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 830 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:44:12,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:44:12,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:44:12,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:44:13,102 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:13,102 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:13,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 04:44:13,103 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:44:13,105 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:13,106 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 27 treesize of output 21 [2021-06-05 04:44:13,106 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:44:13,128 INFO L628 ElimStorePlain]: treesize reduction 42, result has 39.1 percent of original size [2021-06-05 04:44:13,129 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:13,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:44:13,131 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:44:13,138 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:44:13,138 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 04:44:13,138 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-06-05 04:44:13,174 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 04:44:13,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1082008796] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:13,174 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:44:13,174 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-06-05 04:44:13,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546614558] [2021-06-05 04:44:13,174 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 04:44:13,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:44:13,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 04:44:13,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:44:13,174 INFO L87 Difference]: Start difference. First operand 282 states and 615 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:13,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:44:13,462 INFO L93 Difference]: Finished difference Result 309 states and 663 transitions. [2021-06-05 04:44:13,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:44:13,462 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:44:13,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:44:13,463 INFO L225 Difference]: With dead ends: 309 [2021-06-05 04:44:13,463 INFO L226 Difference]: Without dead ends: 296 [2021-06-05 04:44:13,463 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 441.2ms TimeCoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:44:13,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2021-06-05 04:44:13,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 285. [2021-06-05 04:44:13,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 284 states have (on average 2.186619718309859) internal successors, (621), 284 states have internal predecessors, (621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:13,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 621 transitions. [2021-06-05 04:44:13,465 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 621 transitions. Word has length 20 [2021-06-05 04:44:13,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:44:13,465 INFO L482 AbstractCegarLoop]: Abstraction has 285 states and 621 transitions. [2021-06-05 04:44:13,465 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:13,465 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 621 transitions. [2021-06-05 04:44:13,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:44:13,465 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:44:13,465 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:44:13,666 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3897,830 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:44:13,666 INFO L430 AbstractCegarLoop]: === Iteration 836 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:44:13,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:44:13,666 INFO L82 PathProgramCache]: Analyzing trace with hash 11911206, now seen corresponding path program 830 times [2021-06-05 04:44:13,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:44:13,666 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543754185] [2021-06-05 04:44:13,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:44:13,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:44:13,875 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:44:13,875 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:44:13,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543754185] [2021-06-05 04:44:13,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543754185] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:13,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522548556] [2021-06-05 04:44:13,876 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 831 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 831 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:44:13,901 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:44:13,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:44:13,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:44:13,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:44:14,024 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:14,025 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:14,025 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 19 treesize of output 15 [2021-06-05 04:44:14,025 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:44:14,028 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:14,028 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:14,028 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 19 treesize of output 15 [2021-06-05 04:44:14,029 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:44:14,032 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:14,032 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:14,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:44:14,033 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:44:14,035 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:14,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:44:14,036 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:44:14,090 INFO L628 ElimStorePlain]: treesize reduction 83, result has 43.5 percent of original size [2021-06-05 04:44:14,092 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:14,093 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:14,093 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 10 treesize of output 6 [2021-06-05 04:44:14,094 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:44:14,096 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:14,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:44:14,098 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:44:14,120 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:44:14,121 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:44:14,121 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:173, output treesize:38 [2021-06-05 04:44:14,198 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 04:44:14,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [522548556] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:14,198 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:44:14,198 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 04:44:14,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256040315] [2021-06-05 04:44:14,198 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 04:44:14,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:44:14,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 04:44:14,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:44:14,199 INFO L87 Difference]: Start difference. First operand 285 states and 621 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:14,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:44:14,668 INFO L93 Difference]: Finished difference Result 332 states and 699 transitions. [2021-06-05 04:44:14,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 04:44:14,668 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 04:44:14,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:44:14,668 INFO L225 Difference]: With dead ends: 332 [2021-06-05 04:44:14,668 INFO L226 Difference]: Without dead ends: 313 [2021-06-05 04:44:14,668 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 621.5ms TimeCoverageRelationStatistics Valid=111, Invalid=819, Unknown=0, NotChecked=0, Total=930 [2021-06-05 04:44:14,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2021-06-05 04:44:14,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 284. [2021-06-05 04:44:14,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 283 states have (on average 2.187279151943463) internal successors, (619), 283 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:14,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 619 transitions. [2021-06-05 04:44:14,671 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 619 transitions. Word has length 20 [2021-06-05 04:44:14,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:44:14,671 INFO L482 AbstractCegarLoop]: Abstraction has 284 states and 619 transitions. [2021-06-05 04:44:14,671 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 04:44:14,671 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 619 transitions. [2021-06-05 04:44:14,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:44:14,671 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:44:14,671 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:44:14,871 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 831 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3898 [2021-06-05 04:44:14,871 INFO L430 AbstractCegarLoop]: === Iteration 837 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:44:14,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:44:14,872 INFO L82 PathProgramCache]: Analyzing trace with hash -2134259554, now seen corresponding path program 831 times [2021-06-05 04:44:14,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:44:14,872 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926029776] [2021-06-05 04:44:14,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:44:14,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:44:15,075 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 04:44:15,075 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:44:15,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926029776] [2021-06-05 04:44:15,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926029776] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:15,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1392399079] [2021-06-05 04:44:15,075 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 832 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 832 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:44:15,101 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 04:44:15,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:44:15,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:44:15,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:44:15,240 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:15,241 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:15,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:44:15,242 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:44:15,244 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:15,245 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 19 treesize of output 15 [2021-06-05 04:44:15,245 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:44:15,306 INFO L628 ElimStorePlain]: treesize reduction 88, result has 46.0 percent of original size [2021-06-05 04:44:15,309 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:15,309 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 13 treesize of output 9 [2021-06-05 04:44:15,310 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:44:15,334 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:44:15,336 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:15,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:44:15,337 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:44:15,359 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:44:15,361 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:15,361 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 10 treesize of output 6 [2021-06-05 04:44:15,362 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:44:15,383 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:44:15,384 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 04:44:15,384 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-06-05 04:44:15,462 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 04:44:15,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1392399079] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:15,462 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:44:15,462 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 04:44:15,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475832647] [2021-06-05 04:44:15,462 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 04:44:15,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:44:15,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 04:44:15,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:44:15,462 INFO L87 Difference]: Start difference. First operand 284 states and 619 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:16,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:44:16,072 INFO L93 Difference]: Finished difference Result 344 states and 723 transitions. [2021-06-05 04:44:16,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 04:44:16,072 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 04:44:16,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:44:16,073 INFO L225 Difference]: With dead ends: 344 [2021-06-05 04:44:16,073 INFO L226 Difference]: Without dead ends: 322 [2021-06-05 04:44:16,073 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 742.9ms TimeCoverageRelationStatistics Valid=150, Invalid=1040, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 04:44:16,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2021-06-05 04:44:16,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 281. [2021-06-05 04:44:16,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 280 states have (on average 2.1892857142857145) internal successors, (613), 280 states have internal predecessors, (613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:16,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 613 transitions. [2021-06-05 04:44:16,075 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 613 transitions. Word has length 20 [2021-06-05 04:44:16,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:44:16,075 INFO L482 AbstractCegarLoop]: Abstraction has 281 states and 613 transitions. [2021-06-05 04:44:16,075 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:16,075 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 613 transitions. [2021-06-05 04:44:16,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:44:16,075 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:44:16,076 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:44:16,276 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3901,832 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:44:16,276 INFO L430 AbstractCegarLoop]: === Iteration 838 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:44:16,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:44:16,276 INFO L82 PathProgramCache]: Analyzing trace with hash 53923622, now seen corresponding path program 832 times [2021-06-05 04:44:16,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:44:16,276 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820435668] [2021-06-05 04:44:16,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:44:16,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:44:16,492 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:44:16,492 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:44:16,492 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820435668] [2021-06-05 04:44:16,492 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820435668] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:16,492 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475434585] [2021-06-05 04:44:16,492 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 833 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 833 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:44:16,517 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:44:16,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:44:16,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:44:16,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:44:16,691 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:16,692 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:16,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:44:16,693 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:44:16,695 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:16,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:44:16,696 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:44:16,756 INFO L628 ElimStorePlain]: treesize reduction 85, result has 46.9 percent of original size [2021-06-05 04:44:16,759 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:16,759 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 13 treesize of output 9 [2021-06-05 04:44:16,760 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:44:16,784 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:44:16,786 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:16,786 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 19 treesize of output 15 [2021-06-05 04:44:16,787 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:44:16,808 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:44:16,811 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:16,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 04:44:16,812 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:44:16,833 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:44:16,834 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:44:16,834 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-06-05 04:44:16,916 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 04:44:16,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1475434585] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:16,917 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:44:16,917 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 04:44:16,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689605473] [2021-06-05 04:44:16,917 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 04:44:16,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:44:16,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 04:44:16,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:44:16,917 INFO L87 Difference]: Start difference. First operand 281 states and 613 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:17,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:44:17,486 INFO L93 Difference]: Finished difference Result 355 states and 749 transitions. [2021-06-05 04:44:17,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 04:44:17,487 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 04:44:17,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:44:17,487 INFO L225 Difference]: With dead ends: 355 [2021-06-05 04:44:17,487 INFO L226 Difference]: Without dead ends: 336 [2021-06-05 04:44:17,487 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 745.5ms TimeCoverageRelationStatistics Valid=136, Invalid=986, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 04:44:17,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2021-06-05 04:44:17,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 280. [2021-06-05 04:44:17,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 279 states have (on average 2.1899641577060933) internal successors, (611), 279 states have internal predecessors, (611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:17,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 611 transitions. [2021-06-05 04:44:17,489 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 611 transitions. Word has length 20 [2021-06-05 04:44:17,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:44:17,489 INFO L482 AbstractCegarLoop]: Abstraction has 280 states and 611 transitions. [2021-06-05 04:44:17,489 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 04:44:17,489 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 611 transitions. [2021-06-05 04:44:17,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:44:17,490 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:44:17,490 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:44:17,690 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3906,833 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:44:17,690 INFO L430 AbstractCegarLoop]: === Iteration 839 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:44:17,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:44:17,691 INFO L82 PathProgramCache]: Analyzing trace with hash 1480750326, now seen corresponding path program 833 times [2021-06-05 04:44:17,691 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:44:17,691 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799434905] [2021-06-05 04:44:17,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:44:17,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:44:17,915 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 04:44:17,916 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:44:17,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799434905] [2021-06-05 04:44:17,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799434905] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:17,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063741705] [2021-06-05 04:44:17,916 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 834 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 834 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:44:17,942 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:44:17,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:44:17,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:44:17,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:44:18,090 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:18,091 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:18,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 04:44:18,092 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:44:18,094 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:18,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 04:44:18,095 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:44:18,117 INFO L628 ElimStorePlain]: treesize reduction 42, result has 44.0 percent of original size [2021-06-05 04:44:18,118 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:18,119 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 21 treesize of output 13 [2021-06-05 04:44:18,119 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:44:18,126 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:44:18,126 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 04:44:18,126 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-06-05 04:44:18,162 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 04:44:18,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1063741705] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:18,162 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:44:18,162 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-06-05 04:44:18,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93874860] [2021-06-05 04:44:18,163 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 04:44:18,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:44:18,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 04:44:18,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:44:18,163 INFO L87 Difference]: Start difference. First operand 280 states and 611 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:18,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:44:18,592 INFO L93 Difference]: Finished difference Result 319 states and 680 transitions. [2021-06-05 04:44:18,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 04:44:18,592 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:44:18,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:44:18,592 INFO L225 Difference]: With dead ends: 319 [2021-06-05 04:44:18,592 INFO L226 Difference]: Without dead ends: 300 [2021-06-05 04:44:18,592 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 470.3ms TimeCoverageRelationStatistics Valid=87, Invalid=669, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:44:18,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2021-06-05 04:44:18,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 282. [2021-06-05 04:44:18,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 281 states have (on average 2.188612099644128) internal successors, (615), 281 states have internal predecessors, (615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:18,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 615 transitions. [2021-06-05 04:44:18,594 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 615 transitions. Word has length 20 [2021-06-05 04:44:18,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:44:18,595 INFO L482 AbstractCegarLoop]: Abstraction has 282 states and 615 transitions. [2021-06-05 04:44:18,595 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:18,595 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 615 transitions. [2021-06-05 04:44:18,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:44:18,595 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:44:18,595 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:44:18,795 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3911,834 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:44:18,795 INFO L430 AbstractCegarLoop]: === Iteration 840 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:44:18,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:44:18,796 INFO L82 PathProgramCache]: Analyzing trace with hash -1678031698, now seen corresponding path program 834 times [2021-06-05 04:44:18,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:44:18,796 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995771467] [2021-06-05 04:44:18,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:44:18,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:44:18,951 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:44:18,951 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:44:18,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995771467] [2021-06-05 04:44:18,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995771467] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:18,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052914367] [2021-06-05 04:44:18,951 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 835 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 835 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:44:18,977 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 04:44:18,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:44:18,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 04:44:18,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:44:19,094 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:19,095 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:19,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:44:19,096 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:44:19,098 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:19,098 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 19 treesize of output 15 [2021-06-05 04:44:19,099 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:44:19,121 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:44:19,123 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:19,123 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:19,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:44:19,124 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:44:19,126 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:19,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:44:19,128 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:44:19,148 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:44:19,149 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 04:44:19,149 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:35 [2021-06-05 04:44:19,232 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 04:44:19,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1052914367] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:19,232 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:44:19,232 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-06-05 04:44:19,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738367631] [2021-06-05 04:44:19,232 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 04:44:19,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:44:19,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 04:44:19,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:44:19,233 INFO L87 Difference]: Start difference. First operand 282 states and 615 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:19,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:44:19,512 INFO L93 Difference]: Finished difference Result 315 states and 678 transitions. [2021-06-05 04:44:19,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 04:44:19,512 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:44:19,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:44:19,512 INFO L225 Difference]: With dead ends: 315 [2021-06-05 04:44:19,512 INFO L226 Difference]: Without dead ends: 308 [2021-06-05 04:44:19,512 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 407.9ms TimeCoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:44:19,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2021-06-05 04:44:19,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 281. [2021-06-05 04:44:19,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 280 states have (on average 2.1892857142857145) internal successors, (613), 280 states have internal predecessors, (613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:19,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 613 transitions. [2021-06-05 04:44:19,515 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 613 transitions. Word has length 20 [2021-06-05 04:44:19,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:44:19,515 INFO L482 AbstractCegarLoop]: Abstraction has 281 states and 613 transitions. [2021-06-05 04:44:19,515 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:19,515 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 613 transitions. [2021-06-05 04:44:19,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:44:19,515 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:44:19,515 INFO L521 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:44:19,715 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3912,835 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:44:19,715 INFO L430 AbstractCegarLoop]: === Iteration 841 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:44:19,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:44:19,716 INFO L82 PathProgramCache]: Analyzing trace with hash 694696306, now seen corresponding path program 835 times [2021-06-05 04:44:19,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:44:19,716 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512094723] [2021-06-05 04:44:19,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:44:19,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:44:19,790 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:44:19,790 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:44:19,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512094723] [2021-06-05 04:44:19,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512094723] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:19,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257878954] [2021-06-05 04:44:19,790 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 836 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 836 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:44:19,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:44:19,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:44:19,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:44:19,970 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:44:19,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1257878954] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:19,970 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:44:19,970 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 04:44:19,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177405549] [2021-06-05 04:44:19,970 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:44:19,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:44:19,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:44:19,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:44:19,971 INFO L87 Difference]: Start difference. First operand 281 states and 613 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:20,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:44:20,448 INFO L93 Difference]: Finished difference Result 364 states and 785 transitions. [2021-06-05 04:44:20,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 04:44:20,449 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:44:20,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:44:20,449 INFO L225 Difference]: With dead ends: 364 [2021-06-05 04:44:20,449 INFO L226 Difference]: Without dead ends: 364 [2021-06-05 04:44:20,449 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 479.5ms TimeCoverageRelationStatistics Valid=121, Invalid=691, Unknown=0, NotChecked=0, Total=812 [2021-06-05 04:44:20,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2021-06-05 04:44:20,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 281. [2021-06-05 04:44:20,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 280 states have (on average 2.1892857142857145) internal successors, (613), 280 states have internal predecessors, (613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:20,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 613 transitions. [2021-06-05 04:44:20,452 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 613 transitions. Word has length 20 [2021-06-05 04:44:20,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:44:20,452 INFO L482 AbstractCegarLoop]: Abstraction has 281 states and 613 transitions. [2021-06-05 04:44:20,452 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 04:44:20,452 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 613 transitions. [2021-06-05 04:44:20,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:44:20,452 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:44:20,452 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:44:20,652 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 836 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3917 [2021-06-05 04:44:20,652 INFO L430 AbstractCegarLoop]: === Iteration 842 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:44:20,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:44:20,653 INFO L82 PathProgramCache]: Analyzing trace with hash 470764838, now seen corresponding path program 836 times [2021-06-05 04:44:20,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:44:20,653 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17486504] [2021-06-05 04:44:20,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:44:20,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:44:20,868 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 04:44:20,869 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:44:20,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17486504] [2021-06-05 04:44:20,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17486504] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:20,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699323722] [2021-06-05 04:44:20,869 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 837 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 837 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:44:20,894 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:44:20,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:44:20,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:44:20,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:44:21,039 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:21,040 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:21,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:44:21,041 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:44:21,043 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:21,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:44:21,044 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:44:21,105 INFO L628 ElimStorePlain]: treesize reduction 88, result has 45.0 percent of original size [2021-06-05 04:44:21,108 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:21,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:44:21,109 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:44:21,133 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:44:21,136 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:21,136 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 19 treesize of output 15 [2021-06-05 04:44:21,137 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:44:21,159 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:44:21,161 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:21,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:44:21,162 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:44:21,183 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:44:21,184 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 04:44:21,184 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-06-05 04:44:21,265 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 04:44:21,265 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [699323722] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:21,265 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:44:21,265 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 04:44:21,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454227648] [2021-06-05 04:44:21,265 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 04:44:21,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:44:21,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 04:44:21,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:44:21,266 INFO L87 Difference]: Start difference. First operand 281 states and 613 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:21,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:44:21,857 INFO L93 Difference]: Finished difference Result 350 states and 739 transitions. [2021-06-05 04:44:21,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 04:44:21,857 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 04:44:21,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:44:21,858 INFO L225 Difference]: With dead ends: 350 [2021-06-05 04:44:21,858 INFO L226 Difference]: Without dead ends: 331 [2021-06-05 04:44:21,858 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 733.6ms TimeCoverageRelationStatistics Valid=131, Invalid=925, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 04:44:21,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2021-06-05 04:44:21,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 280. [2021-06-05 04:44:21,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 279 states have (on average 2.1899641577060933) internal successors, (611), 279 states have internal predecessors, (611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:21,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 611 transitions. [2021-06-05 04:44:21,860 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 611 transitions. Word has length 20 [2021-06-05 04:44:21,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:44:21,860 INFO L482 AbstractCegarLoop]: Abstraction has 280 states and 611 transitions. [2021-06-05 04:44:21,860 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 04:44:21,860 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 611 transitions. [2021-06-05 04:44:21,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:44:21,860 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:44:21,861 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:44:22,061 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 837 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3927 [2021-06-05 04:44:22,061 INFO L430 AbstractCegarLoop]: === Iteration 843 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:44:22,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:44:22,061 INFO L82 PathProgramCache]: Analyzing trace with hash -1636019282, now seen corresponding path program 837 times [2021-06-05 04:44:22,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:44:22,061 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711400401] [2021-06-05 04:44:22,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:44:22,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:44:22,285 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:44:22,285 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:44:22,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711400401] [2021-06-05 04:44:22,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711400401] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:22,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889346016] [2021-06-05 04:44:22,286 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 838 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 838 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:44:22,311 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:44:22,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:44:22,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:44:22,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:44:22,493 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:22,493 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:22,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:44:22,494 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:44:22,497 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:22,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:44:22,498 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:44:22,559 INFO L628 ElimStorePlain]: treesize reduction 88, result has 45.0 percent of original size [2021-06-05 04:44:22,562 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:22,562 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 10 treesize of output 6 [2021-06-05 04:44:22,563 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:44:22,587 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:44:22,589 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:22,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:44:22,590 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:44:22,612 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:44:22,615 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:22,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:44:22,616 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:44:22,637 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:44:22,638 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 04:44:22,638 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-06-05 04:44:22,721 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:44:22,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1889346016] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:22,721 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:44:22,721 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 04:44:22,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853300451] [2021-06-05 04:44:22,722 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 04:44:22,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:44:22,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 04:44:22,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:44:22,722 INFO L87 Difference]: Start difference. First operand 280 states and 611 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:23,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:44:23,738 INFO L93 Difference]: Finished difference Result 396 states and 812 transitions. [2021-06-05 04:44:23,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 04:44:23,738 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 04:44:23,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:44:23,738 INFO L225 Difference]: With dead ends: 396 [2021-06-05 04:44:23,738 INFO L226 Difference]: Without dead ends: 358 [2021-06-05 04:44:23,738 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 1078.4ms TimeCoverageRelationStatistics Valid=170, Invalid=1312, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 04:44:23,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2021-06-05 04:44:23,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 279. [2021-06-05 04:44:23,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 278 states have (on average 2.1906474820143886) internal successors, (609), 278 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:23,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 609 transitions. [2021-06-05 04:44:23,741 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 609 transitions. Word has length 20 [2021-06-05 04:44:23,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:44:23,741 INFO L482 AbstractCegarLoop]: Abstraction has 279 states and 609 transitions. [2021-06-05 04:44:23,741 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 04:44:23,741 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 609 transitions. [2021-06-05 04:44:23,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:44:23,741 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:44:23,741 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:44:23,941 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 838 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3932 [2021-06-05 04:44:23,942 INFO L430 AbstractCegarLoop]: === Iteration 844 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:44:23,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:44:23,942 INFO L82 PathProgramCache]: Analyzing trace with hash 1773149734, now seen corresponding path program 838 times [2021-06-05 04:44:23,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:44:23,942 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010878009] [2021-06-05 04:44:23,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:44:23,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:44:24,173 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:44:24,173 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:44:24,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010878009] [2021-06-05 04:44:24,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010878009] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:24,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464949376] [2021-06-05 04:44:24,173 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 839 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 839 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:44:24,199 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:44:24,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:44:24,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:44:24,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:44:24,416 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:24,416 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:24,416 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 19 treesize of output 15 [2021-06-05 04:44:24,417 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:44:24,420 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:24,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:44:24,421 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:44:24,484 INFO L628 ElimStorePlain]: treesize reduction 85, result has 45.9 percent of original size [2021-06-05 04:44:24,487 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:24,487 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 10 treesize of output 6 [2021-06-05 04:44:24,488 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:44:24,511 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:44:24,514 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:24,514 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 19 treesize of output 15 [2021-06-05 04:44:24,515 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:44:24,536 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:44:24,539 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:24,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 04:44:24,540 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:44:24,561 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:44:24,562 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:44:24,562 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-06-05 04:44:24,648 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:44:24,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [464949376] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:24,649 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:44:24,649 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 04:44:24,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821969406] [2021-06-05 04:44:24,649 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 04:44:24,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:44:24,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 04:44:24,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=490, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:44:24,649 INFO L87 Difference]: Start difference. First operand 279 states and 609 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:25,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:44:25,278 INFO L93 Difference]: Finished difference Result 360 states and 759 transitions. [2021-06-05 04:44:25,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 04:44:25,279 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 04:44:25,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:44:25,279 INFO L225 Difference]: With dead ends: 360 [2021-06-05 04:44:25,279 INFO L226 Difference]: Without dead ends: 341 [2021-06-05 04:44:25,279 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 800.3ms TimeCoverageRelationStatistics Valid=124, Invalid=998, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 04:44:25,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2021-06-05 04:44:25,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 278. [2021-06-05 04:44:25,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 277 states have (on average 2.191335740072202) internal successors, (607), 277 states have internal predecessors, (607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:25,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 607 transitions. [2021-06-05 04:44:25,282 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 607 transitions. Word has length 20 [2021-06-05 04:44:25,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:44:25,282 INFO L482 AbstractCegarLoop]: Abstraction has 278 states and 607 transitions. [2021-06-05 04:44:25,282 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 04:44:25,282 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 607 transitions. [2021-06-05 04:44:25,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:44:25,282 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:44:25,282 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:44:25,482 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3937,839 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:44:25,482 INFO L430 AbstractCegarLoop]: === Iteration 845 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:44:25,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:44:25,483 INFO L82 PathProgramCache]: Analyzing trace with hash 468810414, now seen corresponding path program 839 times [2021-06-05 04:44:25,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:44:25,483 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153157288] [2021-06-05 04:44:25,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:44:25,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:44:25,673 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 04:44:25,673 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:44:25,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153157288] [2021-06-05 04:44:25,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153157288] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:25,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199909627] [2021-06-05 04:44:25,673 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 840 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 840 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:44:25,699 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 04:44:25,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:44:25,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:44:25,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:44:25,861 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:25,862 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:25,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 04:44:25,863 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:44:25,865 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:25,865 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 27 treesize of output 21 [2021-06-05 04:44:25,866 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:44:25,887 INFO L628 ElimStorePlain]: treesize reduction 42, result has 39.1 percent of original size [2021-06-05 04:44:25,889 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:25,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:44:25,890 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:44:25,897 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:44:25,897 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:44:25,898 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-06-05 04:44:25,936 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 04:44:25,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1199909627] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:25,936 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:44:25,936 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-06-05 04:44:25,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942737350] [2021-06-05 04:44:25,936 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 04:44:25,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:44:25,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 04:44:25,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=450, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:44:25,937 INFO L87 Difference]: Start difference. First operand 278 states and 607 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:26,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:44:26,323 INFO L93 Difference]: Finished difference Result 317 states and 669 transitions. [2021-06-05 04:44:26,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:44:26,323 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:44:26,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:44:26,323 INFO L225 Difference]: With dead ends: 317 [2021-06-05 04:44:26,323 INFO L226 Difference]: Without dead ends: 292 [2021-06-05 04:44:26,323 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 486.5ms TimeCoverageRelationStatistics Valid=86, Invalid=784, Unknown=0, NotChecked=0, Total=870 [2021-06-05 04:44:26,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2021-06-05 04:44:26,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 282. [2021-06-05 04:44:26,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 281 states have (on average 2.185053380782918) internal successors, (614), 281 states have internal predecessors, (614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:26,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 614 transitions. [2021-06-05 04:44:26,325 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 614 transitions. Word has length 20 [2021-06-05 04:44:26,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:44:26,326 INFO L482 AbstractCegarLoop]: Abstraction has 282 states and 614 transitions. [2021-06-05 04:44:26,326 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:26,326 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 614 transitions. [2021-06-05 04:44:26,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:44:26,326 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:44:26,326 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:44:26,526 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3942,840 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:44:26,526 INFO L430 AbstractCegarLoop]: === Iteration 846 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:44:26,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:44:26,527 INFO L82 PathProgramCache]: Analyzing trace with hash 1330815478, now seen corresponding path program 840 times [2021-06-05 04:44:26,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:44:26,527 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419385225] [2021-06-05 04:44:26,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:44:26,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:44:26,717 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 04:44:26,717 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:44:26,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419385225] [2021-06-05 04:44:26,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419385225] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:26,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186513373] [2021-06-05 04:44:26,717 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 841 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 841 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:44:26,743 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 04:44:26,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:44:26,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 04:44:26,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:44:26,901 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:26,902 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:26,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:44:26,903 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:44:26,905 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:26,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:44:26,906 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:44:26,925 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:44:26,927 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:26,927 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:26,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 04:44:26,929 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:44:26,931 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:26,931 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 13 treesize of output 9 [2021-06-05 04:44:26,932 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:44:26,949 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:44:26,950 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 04:44:26,950 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:71, output treesize:29 [2021-06-05 04:44:27,002 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 04:44:27,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [186513373] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:27,002 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:44:27,002 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-06-05 04:44:27,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596057407] [2021-06-05 04:44:27,002 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 04:44:27,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:44:27,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 04:44:27,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=453, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:44:27,003 INFO L87 Difference]: Start difference. First operand 282 states and 614 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:27,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:44:27,718 INFO L93 Difference]: Finished difference Result 318 states and 681 transitions. [2021-06-05 04:44:27,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 04:44:27,719 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:44:27,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:44:27,719 INFO L225 Difference]: With dead ends: 318 [2021-06-05 04:44:27,719 INFO L226 Difference]: Without dead ends: 305 [2021-06-05 04:44:27,719 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 703.4ms TimeCoverageRelationStatistics Valid=110, Invalid=1080, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 04:44:27,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2021-06-05 04:44:27,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 283. [2021-06-05 04:44:27,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 282 states have (on average 2.1843971631205674) internal successors, (616), 282 states have internal predecessors, (616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:27,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 616 transitions. [2021-06-05 04:44:27,721 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 616 transitions. Word has length 20 [2021-06-05 04:44:27,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:44:27,721 INFO L482 AbstractCegarLoop]: Abstraction has 283 states and 616 transitions. [2021-06-05 04:44:27,721 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:27,721 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 616 transitions. [2021-06-05 04:44:27,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:44:27,722 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:44:27,722 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:44:27,922 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3943,841 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:44:27,922 INFO L430 AbstractCegarLoop]: === Iteration 847 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:44:27,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:44:27,922 INFO L82 PathProgramCache]: Analyzing trace with hash -1827966546, now seen corresponding path program 841 times [2021-06-05 04:44:27,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:44:27,922 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208730569] [2021-06-05 04:44:27,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:44:27,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:44:28,122 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:44:28,122 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:44:28,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208730569] [2021-06-05 04:44:28,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208730569] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:28,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845634509] [2021-06-05 04:44:28,123 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 842 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 842 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:44:28,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:44:28,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:44:28,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:44:28,300 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:28,300 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:28,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:44:28,301 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:44:28,303 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:28,304 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:28,304 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 19 treesize of output 15 [2021-06-05 04:44:28,305 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:44:28,307 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:28,307 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:28,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:44:28,308 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:44:28,311 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:28,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:44:28,311 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:44:28,366 INFO L628 ElimStorePlain]: treesize reduction 80, result has 44.4 percent of original size [2021-06-05 04:44:28,368 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:28,369 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:28,369 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 10 treesize of output 6 [2021-06-05 04:44:28,370 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:44:28,372 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:28,373 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 10 treesize of output 6 [2021-06-05 04:44:28,374 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:44:28,396 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:44:28,397 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 04:44:28,397 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:173, output treesize:38 [2021-06-05 04:44:28,481 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:44:28,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [845634509] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:28,482 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:44:28,482 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 04:44:28,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797422730] [2021-06-05 04:44:28,482 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 04:44:28,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:44:28,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 04:44:28,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=491, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:44:28,482 INFO L87 Difference]: Start difference. First operand 283 states and 616 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:29,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:44:29,265 INFO L93 Difference]: Finished difference Result 347 states and 723 transitions. [2021-06-05 04:44:29,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 04:44:29,266 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 04:44:29,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:44:29,266 INFO L225 Difference]: With dead ends: 347 [2021-06-05 04:44:29,266 INFO L226 Difference]: Without dead ends: 323 [2021-06-05 04:44:29,266 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 844.9ms TimeCoverageRelationStatistics Valid=129, Invalid=1203, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 04:44:29,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2021-06-05 04:44:29,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 280. [2021-06-05 04:44:29,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 279 states have (on average 2.186379928315412) internal successors, (610), 279 states have internal predecessors, (610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:29,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 610 transitions. [2021-06-05 04:44:29,269 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 610 transitions. Word has length 20 [2021-06-05 04:44:29,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:44:29,269 INFO L482 AbstractCegarLoop]: Abstraction has 280 states and 610 transitions. [2021-06-05 04:44:29,269 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 04:44:29,269 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 610 transitions. [2021-06-05 04:44:29,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:44:29,269 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:44:29,269 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:44:29,469 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 842 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3946 [2021-06-05 04:44:29,469 INFO L430 AbstractCegarLoop]: === Iteration 848 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:44:29,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:44:29,470 INFO L82 PathProgramCache]: Analyzing trace with hash -775968642, now seen corresponding path program 842 times [2021-06-05 04:44:29,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:44:29,470 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786889697] [2021-06-05 04:44:29,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:44:29,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:44:29,721 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:44:29,722 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:44:29,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786889697] [2021-06-05 04:44:29,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786889697] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:29,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1880467844] [2021-06-05 04:44:29,722 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 843 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 843 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:44:29,747 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:44:29,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:44:29,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:44:29,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:44:29,896 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:29,897 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:29,897 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 27 treesize of output 21 [2021-06-05 04:44:29,898 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:44:29,900 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:29,900 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 27 treesize of output 21 [2021-06-05 04:44:29,901 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:44:29,923 INFO L628 ElimStorePlain]: treesize reduction 48, result has 36.0 percent of original size [2021-06-05 04:44:29,925 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:29,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:44:29,926 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:44:29,933 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:44:29,934 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 04:44:29,934 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-06-05 04:44:29,973 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 04:44:29,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1880467844] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:29,973 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:44:29,973 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 04:44:29,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848823350] [2021-06-05 04:44:29,973 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 04:44:29,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:44:29,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 04:44:29,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:44:29,974 INFO L87 Difference]: Start difference. First operand 280 states and 610 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:30,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:44:30,306 INFO L93 Difference]: Finished difference Result 304 states and 649 transitions. [2021-06-05 04:44:30,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:44:30,306 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 04:44:30,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:44:30,306 INFO L225 Difference]: With dead ends: 304 [2021-06-05 04:44:30,306 INFO L226 Difference]: Without dead ends: 291 [2021-06-05 04:44:30,307 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 532.7ms TimeCoverageRelationStatistics Valid=94, Invalid=776, Unknown=0, NotChecked=0, Total=870 [2021-06-05 04:44:30,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2021-06-05 04:44:30,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 282. [2021-06-05 04:44:30,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 281 states have (on average 2.185053380782918) internal successors, (614), 281 states have internal predecessors, (614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:30,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 614 transitions. [2021-06-05 04:44:30,309 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 614 transitions. Word has length 20 [2021-06-05 04:44:30,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:44:30,309 INFO L482 AbstractCegarLoop]: Abstraction has 282 states and 614 transitions. [2021-06-05 04:44:30,309 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 04:44:30,309 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 614 transitions. [2021-06-05 04:44:30,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:44:30,309 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:44:30,309 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:44:30,509 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3949,843 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:44:30,509 INFO L430 AbstractCegarLoop]: === Iteration 849 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:44:30,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:44:30,510 INFO L82 PathProgramCache]: Analyzing trace with hash 360216630, now seen corresponding path program 843 times [2021-06-05 04:44:30,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:44:30,510 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31477003] [2021-06-05 04:44:30,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:44:30,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:44:30,712 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 04:44:30,712 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:44:30,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31477003] [2021-06-05 04:44:30,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31477003] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:30,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496229759] [2021-06-05 04:44:30,712 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 844 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 844 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:44:30,739 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 04:44:30,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:44:30,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 04:44:30,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:44:30,866 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:30,867 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:30,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:44:30,868 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:44:30,870 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:30,870 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:30,871 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 19 treesize of output 15 [2021-06-05 04:44:30,871 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:44:30,874 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:30,874 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:30,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:44:30,875 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:44:30,877 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:30,877 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 19 treesize of output 15 [2021-06-05 04:44:30,878 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:44:30,926 INFO L628 ElimStorePlain]: treesize reduction 74, result has 45.2 percent of original size [2021-06-05 04:44:30,928 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:30,928 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:30,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:44:30,930 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:44:30,932 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:30,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 04:44:30,933 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:44:30,957 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:44:30,958 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 04:44:30,958 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:161, output treesize:32 [2021-06-05 04:44:31,042 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:44:31,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [496229759] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:31,042 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:44:31,042 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-06-05 04:44:31,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120854182] [2021-06-05 04:44:31,042 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 04:44:31,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:44:31,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 04:44:31,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:44:31,043 INFO L87 Difference]: Start difference. First operand 282 states and 614 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:31,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:44:31,958 INFO L93 Difference]: Finished difference Result 373 states and 771 transitions. [2021-06-05 04:44:31,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 04:44:31,959 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:44:31,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:44:31,959 INFO L225 Difference]: With dead ends: 373 [2021-06-05 04:44:31,959 INFO L226 Difference]: Without dead ends: 347 [2021-06-05 04:44:31,959 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 988.9ms TimeCoverageRelationStatistics Valid=159, Invalid=1401, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 04:44:31,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2021-06-05 04:44:31,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 281. [2021-06-05 04:44:31,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 280 states have (on average 2.1857142857142855) internal successors, (612), 280 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:31,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 612 transitions. [2021-06-05 04:44:31,961 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 612 transitions. Word has length 20 [2021-06-05 04:44:31,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:44:31,961 INFO L482 AbstractCegarLoop]: Abstraction has 281 states and 612 transitions. [2021-06-05 04:44:31,961 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:31,962 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 612 transitions. [2021-06-05 04:44:31,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:44:31,962 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:44:31,962 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:44:32,162 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3950,844 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:44:32,162 INFO L430 AbstractCegarLoop]: === Iteration 850 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:44:32,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:44:32,162 INFO L82 PathProgramCache]: Analyzing trace with hash -1785954130, now seen corresponding path program 844 times [2021-06-05 04:44:32,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:44:32,162 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089396875] [2021-06-05 04:44:32,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:44:32,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:44:32,340 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 04:44:32,340 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:44:32,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089396875] [2021-06-05 04:44:32,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089396875] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:32,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268703886] [2021-06-05 04:44:32,340 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 845 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 845 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:44:32,365 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:44:32,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:44:32,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:44:32,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:44:32,508 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:32,508 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:32,508 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 19 treesize of output 15 [2021-06-05 04:44:32,509 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:44:32,512 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:32,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:44:32,512 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:44:32,575 INFO L628 ElimStorePlain]: treesize reduction 88, result has 46.0 percent of original size [2021-06-05 04:44:32,577 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:32,578 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 13 treesize of output 9 [2021-06-05 04:44:32,579 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:44:32,603 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:44:32,605 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:32,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:44:32,606 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:44:32,628 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:44:32,630 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:32,630 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 13 treesize of output 9 [2021-06-05 04:44:32,632 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:44:32,652 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:44:32,654 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:44:32,655 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-06-05 04:44:32,733 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 04:44:32,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1268703886] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:32,734 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:44:32,734 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 04:44:32,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668907301] [2021-06-05 04:44:32,734 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 04:44:32,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:44:32,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 04:44:32,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:44:32,734 INFO L87 Difference]: Start difference. First operand 281 states and 612 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:33,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:44:33,292 INFO L93 Difference]: Finished difference Result 341 states and 721 transitions. [2021-06-05 04:44:33,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 04:44:33,292 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 04:44:33,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:44:33,293 INFO L225 Difference]: With dead ends: 341 [2021-06-05 04:44:33,293 INFO L226 Difference]: Without dead ends: 317 [2021-06-05 04:44:33,293 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 566.2ms TimeCoverageRelationStatistics Valid=120, Invalid=1002, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 04:44:33,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2021-06-05 04:44:33,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 278. [2021-06-05 04:44:33,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 277 states have (on average 2.191335740072202) internal successors, (607), 277 states have internal predecessors, (607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:33,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 607 transitions. [2021-06-05 04:44:33,295 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 607 transitions. Word has length 20 [2021-06-05 04:44:33,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:44:33,295 INFO L482 AbstractCegarLoop]: Abstraction has 278 states and 607 transitions. [2021-06-05 04:44:33,295 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 04:44:33,295 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 607 transitions. [2021-06-05 04:44:33,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:44:33,295 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:44:33,295 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:44:33,496 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 845 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3954 [2021-06-05 04:44:33,496 INFO L430 AbstractCegarLoop]: === Iteration 851 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:44:33,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:44:33,496 INFO L82 PathProgramCache]: Analyzing trace with hash -1661766922, now seen corresponding path program 845 times [2021-06-05 04:44:33,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:44:33,496 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723206145] [2021-06-05 04:44:33,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:44:33,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:44:33,684 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 04:44:33,684 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:44:33,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723206145] [2021-06-05 04:44:33,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723206145] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:33,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310219989] [2021-06-05 04:44:33,685 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 846 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 846 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:44:33,711 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 04:44:33,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:44:33,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:44:33,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:44:33,859 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:33,860 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:33,860 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 27 treesize of output 21 [2021-06-05 04:44:33,861 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:44:33,863 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:33,863 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 27 treesize of output 21 [2021-06-05 04:44:33,864 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:44:33,885 INFO L628 ElimStorePlain]: treesize reduction 36, result has 42.9 percent of original size [2021-06-05 04:44:33,887 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:33,887 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 10 treesize of output 6 [2021-06-05 04:44:33,888 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:44:33,895 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:44:33,896 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 04:44:33,896 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-06-05 04:44:33,931 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:44:33,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1310219989] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:33,932 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:44:33,932 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-06-05 04:44:33,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924370456] [2021-06-05 04:44:33,932 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 04:44:33,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:44:33,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 04:44:33,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:44:33,932 INFO L87 Difference]: Start difference. First operand 278 states and 607 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:34,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:44:34,269 INFO L93 Difference]: Finished difference Result 317 states and 676 transitions. [2021-06-05 04:44:34,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 04:44:34,269 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:44:34,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:44:34,269 INFO L225 Difference]: With dead ends: 317 [2021-06-05 04:44:34,269 INFO L226 Difference]: Without dead ends: 298 [2021-06-05 04:44:34,269 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 463.4ms TimeCoverageRelationStatistics Valid=91, Invalid=721, Unknown=0, NotChecked=0, Total=812 [2021-06-05 04:44:34,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2021-06-05 04:44:34,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 281. [2021-06-05 04:44:34,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 280 states have (on average 2.1892857142857145) internal successors, (613), 280 states have internal predecessors, (613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:34,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 613 transitions. [2021-06-05 04:44:34,271 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 613 transitions. Word has length 20 [2021-06-05 04:44:34,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:44:34,271 INFO L482 AbstractCegarLoop]: Abstraction has 281 states and 613 transitions. [2021-06-05 04:44:34,272 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:34,272 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 613 transitions. [2021-06-05 04:44:34,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:44:34,272 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:44:34,272 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:44:34,472 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 846 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3959 [2021-06-05 04:44:34,472 INFO L430 AbstractCegarLoop]: === Iteration 852 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:44:34,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:44:34,473 INFO L82 PathProgramCache]: Analyzing trace with hash -525581650, now seen corresponding path program 846 times [2021-06-05 04:44:34,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:44:34,473 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404771371] [2021-06-05 04:44:34,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:44:34,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:44:34,680 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:44:34,680 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:44:34,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404771371] [2021-06-05 04:44:34,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404771371] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:34,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208423028] [2021-06-05 04:44:34,680 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 847 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 847 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:44:34,706 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 04:44:34,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:44:34,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:44:34,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:44:34,832 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:34,833 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:34,833 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 19 treesize of output 15 [2021-06-05 04:44:34,834 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:44:34,836 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:34,837 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:34,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:44:34,837 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:44:34,840 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:34,840 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:34,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:44:34,841 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:44:34,843 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:34,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:44:34,844 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:44:34,898 INFO L628 ElimStorePlain]: treesize reduction 80, result has 44.4 percent of original size [2021-06-05 04:44:34,901 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:34,901 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:34,901 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 10 treesize of output 6 [2021-06-05 04:44:34,903 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:44:34,909 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:34,910 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 10 treesize of output 6 [2021-06-05 04:44:34,911 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:44:34,933 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:44:34,934 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 04:44:34,934 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:173, output treesize:38 [2021-06-05 04:44:35,013 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 04:44:35,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [208423028] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:35,013 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:44:35,013 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 04:44:35,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468806635] [2021-06-05 04:44:35,014 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 04:44:35,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:44:35,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 04:44:35,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=485, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:44:35,014 INFO L87 Difference]: Start difference. First operand 281 states and 613 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:35,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:44:35,547 INFO L93 Difference]: Finished difference Result 338 states and 708 transitions. [2021-06-05 04:44:35,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 04:44:35,548 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 04:44:35,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:44:35,548 INFO L225 Difference]: With dead ends: 338 [2021-06-05 04:44:35,548 INFO L226 Difference]: Without dead ends: 316 [2021-06-05 04:44:35,548 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 635.1ms TimeCoverageRelationStatistics Valid=110, Invalid=882, Unknown=0, NotChecked=0, Total=992 [2021-06-05 04:44:35,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2021-06-05 04:44:35,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 277. [2021-06-05 04:44:35,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 276 states have (on average 2.1920289855072466) internal successors, (605), 276 states have internal predecessors, (605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:35,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 605 transitions. [2021-06-05 04:44:35,550 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 605 transitions. Word has length 20 [2021-06-05 04:44:35,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:44:35,551 INFO L482 AbstractCegarLoop]: Abstraction has 277 states and 605 transitions. [2021-06-05 04:44:35,551 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 04:44:35,551 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 605 transitions. [2021-06-05 04:44:35,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:44:35,551 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:44:35,551 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:44:35,751 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3960,847 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:44:35,752 INFO L430 AbstractCegarLoop]: === Iteration 853 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:44:35,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:44:35,752 INFO L82 PathProgramCache]: Analyzing trace with hash 1623214886, now seen corresponding path program 847 times [2021-06-05 04:44:35,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:44:35,752 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203282237] [2021-06-05 04:44:35,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:44:35,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:44:35,954 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:44:35,954 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:44:35,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203282237] [2021-06-05 04:44:35,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203282237] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:35,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058239314] [2021-06-05 04:44:35,954 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 848 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 848 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:44:35,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:44:35,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:44:35,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:44:36,129 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:36,130 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:36,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:44:36,131 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:44:36,134 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:36,134 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 19 treesize of output 15 [2021-06-05 04:44:36,134 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:44:36,194 INFO L628 ElimStorePlain]: treesize reduction 88, result has 45.0 percent of original size [2021-06-05 04:44:36,197 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:36,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:44:36,198 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:44:36,226 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:44:36,228 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:36,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:44:36,229 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:44:36,251 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:44:36,253 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:36,253 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 13 treesize of output 9 [2021-06-05 04:44:36,254 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:44:36,275 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:44:36,276 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 04:44:36,276 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-06-05 04:44:36,356 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:44:36,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2058239314] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:36,356 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:44:36,356 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 04:44:36,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034489419] [2021-06-05 04:44:36,356 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 04:44:36,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:44:36,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 04:44:36,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=485, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:44:36,357 INFO L87 Difference]: Start difference. First operand 277 states and 605 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:37,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:44:37,040 INFO L93 Difference]: Finished difference Result 342 states and 723 transitions. [2021-06-05 04:44:37,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 04:44:37,040 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 04:44:37,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:44:37,041 INFO L225 Difference]: With dead ends: 342 [2021-06-05 04:44:37,041 INFO L226 Difference]: Without dead ends: 323 [2021-06-05 04:44:37,041 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 809.7ms TimeCoverageRelationStatistics Valid=148, Invalid=1112, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 04:44:37,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2021-06-05 04:44:37,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 276. [2021-06-05 04:44:37,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 275 states have (on average 2.192727272727273) internal successors, (603), 275 states have internal predecessors, (603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:37,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 603 transitions. [2021-06-05 04:44:37,043 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 603 transitions. Word has length 20 [2021-06-05 04:44:37,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:44:37,043 INFO L482 AbstractCegarLoop]: Abstraction has 276 states and 603 transitions. [2021-06-05 04:44:37,043 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 04:44:37,043 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 603 transitions. [2021-06-05 04:44:37,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:44:37,044 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:44:37,044 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:44:37,244 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3963,848 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:44:37,244 INFO L430 AbstractCegarLoop]: === Iteration 854 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:44:37,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:44:37,245 INFO L82 PathProgramCache]: Analyzing trace with hash -483569234, now seen corresponding path program 848 times [2021-06-05 04:44:37,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:44:37,245 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641770489] [2021-06-05 04:44:37,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:44:37,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:44:37,519 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:44:37,519 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:44:37,519 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641770489] [2021-06-05 04:44:37,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641770489] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:37,519 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658739138] [2021-06-05 04:44:37,519 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 849 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 849 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:44:37,544 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:44:37,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:44:37,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:44:37,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:44:37,730 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:37,730 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:37,730 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 19 treesize of output 15 [2021-06-05 04:44:37,731 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:44:37,734 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:37,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:44:37,735 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:44:37,796 INFO L628 ElimStorePlain]: treesize reduction 85, result has 46.9 percent of original size [2021-06-05 04:44:37,799 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:37,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:44:37,800 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:44:37,822 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:44:37,824 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:37,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:44:37,826 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:44:37,847 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:44:37,850 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:37,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 04:44:37,851 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:44:37,872 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:44:37,873 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 04:44:37,873 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-06-05 04:44:37,957 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 04:44:37,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1658739138] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:37,957 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:44:37,957 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 04:44:37,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345760028] [2021-06-05 04:44:37,957 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 04:44:37,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:44:37,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 04:44:37,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:44:37,958 INFO L87 Difference]: Start difference. First operand 276 states and 603 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:38,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:44:38,622 INFO L93 Difference]: Finished difference Result 350 states and 739 transitions. [2021-06-05 04:44:38,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 04:44:38,622 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 04:44:38,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:44:38,622 INFO L225 Difference]: With dead ends: 350 [2021-06-05 04:44:38,622 INFO L226 Difference]: Without dead ends: 331 [2021-06-05 04:44:38,622 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 858.1ms TimeCoverageRelationStatistics Valid=140, Invalid=1120, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 04:44:38,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2021-06-05 04:44:38,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 274. [2021-06-05 04:44:38,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 273 states have (on average 2.1941391941391943) internal successors, (599), 273 states have internal predecessors, (599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:38,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 599 transitions. [2021-06-05 04:44:38,625 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 599 transitions. Word has length 20 [2021-06-05 04:44:38,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:44:38,625 INFO L482 AbstractCegarLoop]: Abstraction has 274 states and 599 transitions. [2021-06-05 04:44:38,625 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 04:44:38,625 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 599 transitions. [2021-06-05 04:44:38,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:44:38,625 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:44:38,625 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:44:38,826 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 849 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3968 [2021-06-05 04:44:38,826 INFO L430 AbstractCegarLoop]: === Iteration 855 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:44:38,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:44:38,826 INFO L82 PathProgramCache]: Analyzing trace with hash 943257470, now seen corresponding path program 849 times [2021-06-05 04:44:38,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:44:38,826 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056151207] [2021-06-05 04:44:38,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:44:38,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:44:38,990 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:44:38,990 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:44:38,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056151207] [2021-06-05 04:44:38,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056151207] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:38,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246987306] [2021-06-05 04:44:38,990 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 850 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 850 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:44:39,016 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 04:44:39,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:44:39,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 04:44:39,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:44:39,155 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:39,156 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:39,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:44:39,156 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:44:39,158 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:39,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:44:39,159 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:44:39,177 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:44:39,179 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:39,180 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:39,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 04:44:39,181 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:44:39,183 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:39,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:44:39,184 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:44:39,201 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:44:39,202 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 04:44:39,202 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:71, output treesize:29 [2021-06-05 04:44:39,255 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:44:39,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1246987306] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:39,255 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:44:39,256 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 04:44:39,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273287064] [2021-06-05 04:44:39,256 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 04:44:39,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:44:39,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 04:44:39,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:44:39,256 INFO L87 Difference]: Start difference. First operand 274 states and 599 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:39,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:44:39,773 INFO L93 Difference]: Finished difference Result 309 states and 664 transitions. [2021-06-05 04:44:39,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 04:44:39,773 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 04:44:39,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:44:39,774 INFO L225 Difference]: With dead ends: 309 [2021-06-05 04:44:39,774 INFO L226 Difference]: Without dead ends: 296 [2021-06-05 04:44:39,774 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 494.0ms TimeCoverageRelationStatistics Valid=97, Invalid=833, Unknown=0, NotChecked=0, Total=930 [2021-06-05 04:44:39,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2021-06-05 04:44:39,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 278. [2021-06-05 04:44:39,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 277 states have (on average 2.191335740072202) internal successors, (607), 277 states have internal predecessors, (607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:39,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 607 transitions. [2021-06-05 04:44:39,776 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 607 transitions. Word has length 20 [2021-06-05 04:44:39,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:44:39,776 INFO L482 AbstractCegarLoop]: Abstraction has 278 states and 607 transitions. [2021-06-05 04:44:39,776 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 04:44:39,776 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 607 transitions. [2021-06-05 04:44:39,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:44:39,776 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:44:39,776 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:44:39,976 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3973,850 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:44:39,977 INFO L430 AbstractCegarLoop]: === Iteration 856 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:44:39,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:44:39,977 INFO L82 PathProgramCache]: Analyzing trace with hash 2079442742, now seen corresponding path program 850 times [2021-06-05 04:44:39,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:44:39,977 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461722558] [2021-06-05 04:44:39,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:44:39,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:44:40,145 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 04:44:40,145 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:44:40,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461722558] [2021-06-05 04:44:40,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461722558] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:40,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016016152] [2021-06-05 04:44:40,145 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 851 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 851 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:44:40,170 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:44:40,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:44:40,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:44:40,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:44:40,294 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:40,294 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:40,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:44:40,295 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:44:40,302 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:40,302 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:40,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:44:40,303 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:44:40,306 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:40,306 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:40,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:44:40,307 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:44:40,309 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:40,309 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 19 treesize of output 15 [2021-06-05 04:44:40,310 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:44:40,363 INFO L628 ElimStorePlain]: treesize reduction 80, result has 45.6 percent of original size [2021-06-05 04:44:40,366 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:40,366 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:40,366 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 13 treesize of output 9 [2021-06-05 04:44:40,367 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:44:40,370 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:40,370 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 10 treesize of output 6 [2021-06-05 04:44:40,371 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:44:40,393 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:44:40,394 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 04:44:40,394 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:173, output treesize:38 [2021-06-05 04:44:40,467 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 04:44:40,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2016016152] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:40,467 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:44:40,467 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-06-05 04:44:40,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207647063] [2021-06-05 04:44:40,468 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 04:44:40,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:44:40,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 04:44:40,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:44:40,468 INFO L87 Difference]: Start difference. First operand 278 states and 607 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:40,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:44:40,941 INFO L93 Difference]: Finished difference Result 336 states and 702 transitions. [2021-06-05 04:44:40,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 04:44:40,941 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:44:40,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:44:40,941 INFO L225 Difference]: With dead ends: 336 [2021-06-05 04:44:40,941 INFO L226 Difference]: Without dead ends: 312 [2021-06-05 04:44:40,941 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 461.1ms TimeCoverageRelationStatistics Valid=98, Invalid=772, Unknown=0, NotChecked=0, Total=870 [2021-06-05 04:44:40,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2021-06-05 04:44:40,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 275. [2021-06-05 04:44:40,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 274 states have (on average 2.1934306569343067) internal successors, (601), 274 states have internal predecessors, (601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:40,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 601 transitions. [2021-06-05 04:44:40,944 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 601 transitions. Word has length 20 [2021-06-05 04:44:40,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:44:40,944 INFO L482 AbstractCegarLoop]: Abstraction has 275 states and 601 transitions. [2021-06-05 04:44:40,944 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:40,944 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 601 transitions. [2021-06-05 04:44:40,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:44:40,944 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:44:40,944 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:44:41,144 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3976,851 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:44:41,144 INFO L430 AbstractCegarLoop]: === Iteration 857 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:44:41,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:44:41,145 INFO L82 PathProgramCache]: Analyzing trace with hash -66728018, now seen corresponding path program 851 times [2021-06-05 04:44:41,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:44:41,145 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827734706] [2021-06-05 04:44:41,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:44:41,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:44:41,357 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:44:41,357 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:44:41,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827734706] [2021-06-05 04:44:41,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827734706] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:41,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322534208] [2021-06-05 04:44:41,357 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 852 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 852 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:44:41,383 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:44:41,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:44:41,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:44:41,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:44:41,527 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:41,528 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:41,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:44:41,529 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:44:41,532 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:41,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:44:41,532 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:44:41,597 INFO L628 ElimStorePlain]: treesize reduction 85, result has 45.9 percent of original size [2021-06-05 04:44:41,600 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:41,600 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 19 treesize of output 15 [2021-06-05 04:44:41,601 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:44:41,622 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:44:41,625 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:41,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:44:41,626 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:44:41,647 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:44:41,650 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:41,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:44:41,651 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:44:41,672 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:44:41,673 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 04:44:41,673 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-06-05 04:44:41,754 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 04:44:41,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1322534208] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:41,754 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:44:41,754 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 04:44:41,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615925846] [2021-06-05 04:44:41,754 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 04:44:41,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:44:41,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 04:44:41,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=485, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:44:41,755 INFO L87 Difference]: Start difference. First operand 275 states and 601 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:42,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:44:42,379 INFO L93 Difference]: Finished difference Result 351 states and 737 transitions. [2021-06-05 04:44:42,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 04:44:42,379 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 04:44:42,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:44:42,380 INFO L225 Difference]: With dead ends: 351 [2021-06-05 04:44:42,380 INFO L226 Difference]: Without dead ends: 327 [2021-06-05 04:44:42,380 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 745.0ms TimeCoverageRelationStatistics Valid=132, Invalid=990, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 04:44:42,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2021-06-05 04:44:42,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 272. [2021-06-05 04:44:42,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 271 states have (on average 2.195571955719557) internal successors, (595), 271 states have internal predecessors, (595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:42,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 595 transitions. [2021-06-05 04:44:42,382 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 595 transitions. Word has length 20 [2021-06-05 04:44:42,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:44:42,382 INFO L482 AbstractCegarLoop]: Abstraction has 272 states and 595 transitions. [2021-06-05 04:44:42,382 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 04:44:42,382 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 595 transitions. [2021-06-05 04:44:42,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:44:42,382 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:44:42,383 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:44:42,583 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 852 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3979 [2021-06-05 04:44:42,583 INFO L430 AbstractCegarLoop]: === Iteration 858 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:44:42,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:44:42,583 INFO L82 PathProgramCache]: Analyzing trace with hash 2121455158, now seen corresponding path program 852 times [2021-06-05 04:44:42,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:44:42,583 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818103299] [2021-06-05 04:44:42,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:44:42,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:44:42,855 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:44:42,855 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:44:42,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818103299] [2021-06-05 04:44:42,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818103299] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:42,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1850492690] [2021-06-05 04:44:42,855 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 853 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 853 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:44:42,887 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:44:42,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:44:42,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:44:42,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:44:43,074 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:43,075 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:43,075 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 19 treesize of output 15 [2021-06-05 04:44:43,075 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:44:43,078 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:43,078 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 19 treesize of output 15 [2021-06-05 04:44:43,079 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:44:43,141 INFO L628 ElimStorePlain]: treesize reduction 85, result has 45.9 percent of original size [2021-06-05 04:44:43,143 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:43,144 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 10 treesize of output 6 [2021-06-05 04:44:43,145 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:44:43,168 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:44:43,170 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:43,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:44:43,171 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:44:43,193 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:44:43,195 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:43,195 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 13 treesize of output 9 [2021-06-05 04:44:43,196 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:44:43,217 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:44:43,218 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:44:43,218 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-06-05 04:44:43,300 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 04:44:43,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1850492690] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:43,300 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:44:43,300 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 04:44:43,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683244416] [2021-06-05 04:44:43,300 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 04:44:43,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:44:43,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 04:44:43,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=485, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:44:43,301 INFO L87 Difference]: Start difference. First operand 272 states and 595 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:44,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:44:44,167 INFO L93 Difference]: Finished difference Result 369 states and 764 transitions. [2021-06-05 04:44:44,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:44:44,168 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 04:44:44,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:44:44,168 INFO L225 Difference]: With dead ends: 369 [2021-06-05 04:44:44,168 INFO L226 Difference]: Without dead ends: 336 [2021-06-05 04:44:44,168 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 992.4ms TimeCoverageRelationStatistics Valid=145, Invalid=1045, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 04:44:44,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2021-06-05 04:44:44,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 271. [2021-06-05 04:44:44,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 270 states have (on average 2.196296296296296) internal successors, (593), 270 states have internal predecessors, (593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:44,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 593 transitions. [2021-06-05 04:44:44,170 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 593 transitions. Word has length 20 [2021-06-05 04:44:44,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:44:44,170 INFO L482 AbstractCegarLoop]: Abstraction has 271 states and 593 transitions. [2021-06-05 04:44:44,170 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 04:44:44,171 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 593 transitions. [2021-06-05 04:44:44,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:44:44,171 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:44:44,171 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:44:44,371 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3984,853 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:44:44,371 INFO L430 AbstractCegarLoop]: === Iteration 859 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:44:44,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:44:44,371 INFO L82 PathProgramCache]: Analyzing trace with hash 1235656878, now seen corresponding path program 853 times [2021-06-05 04:44:44,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:44:44,372 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716127103] [2021-06-05 04:44:44,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:44:44,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:44:44,580 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 04:44:44,580 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:44:44,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716127103] [2021-06-05 04:44:44,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716127103] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:44,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869025071] [2021-06-05 04:44:44,581 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 854 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 854 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:44:44,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:44:44,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:44:44,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:44:44,812 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:44,813 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:44,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:44:44,814 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:44:44,817 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:44,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:44:44,817 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:44:44,880 INFO L628 ElimStorePlain]: treesize reduction 88, result has 46.0 percent of original size [2021-06-05 04:44:44,883 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:44,883 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 13 treesize of output 9 [2021-06-05 04:44:44,884 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:44:44,908 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:44:44,910 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:44,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:44:44,911 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:44:44,933 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:44:44,936 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:44,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 04:44:44,937 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:44:44,958 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:44:44,959 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 04:44:44,959 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-06-05 04:44:45,038 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 04:44:45,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [869025071] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:45,038 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:44:45,038 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-06-05 04:44:45,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215426686] [2021-06-05 04:44:45,038 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 04:44:45,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:44:45,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 04:44:45,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=447, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:44:45,039 INFO L87 Difference]: Start difference. First operand 271 states and 593 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:45,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:44:45,480 INFO L93 Difference]: Finished difference Result 335 states and 709 transitions. [2021-06-05 04:44:45,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 04:44:45,480 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:44:45,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:44:45,481 INFO L225 Difference]: With dead ends: 335 [2021-06-05 04:44:45,481 INFO L226 Difference]: Without dead ends: 316 [2021-06-05 04:44:45,481 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 610.0ms TimeCoverageRelationStatistics Valid=102, Invalid=768, Unknown=0, NotChecked=0, Total=870 [2021-06-05 04:44:45,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2021-06-05 04:44:45,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 269. [2021-06-05 04:44:45,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 268 states have (on average 2.1977611940298507) internal successors, (589), 268 states have internal predecessors, (589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:45,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 589 transitions. [2021-06-05 04:44:45,483 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 589 transitions. Word has length 20 [2021-06-05 04:44:45,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:44:45,483 INFO L482 AbstractCegarLoop]: Abstraction has 269 states and 589 transitions. [2021-06-05 04:44:45,483 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:45,483 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 589 transitions. [2021-06-05 04:44:45,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:44:45,483 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:44:45,483 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:44:45,684 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 854 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3989 [2021-06-05 04:44:45,684 INFO L430 AbstractCegarLoop]: === Iteration 860 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:44:45,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:44:45,684 INFO L82 PathProgramCache]: Analyzing trace with hash 94634998, now seen corresponding path program 854 times [2021-06-05 04:44:45,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:44:45,684 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279596569] [2021-06-05 04:44:45,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:44:45,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:44:45,878 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 04:44:45,878 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:44:45,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279596569] [2021-06-05 04:44:45,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279596569] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:45,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452131691] [2021-06-05 04:44:45,878 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 855 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 855 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:44:45,903 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:44:45,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:44:45,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:44:45,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:44:46,058 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:46,059 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:46,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 04:44:46,060 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:44:46,062 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:46,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 04:44:46,063 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:44:46,085 INFO L628 ElimStorePlain]: treesize reduction 36, result has 42.9 percent of original size [2021-06-05 04:44:46,087 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:46,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:44:46,088 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:44:46,095 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:44:46,095 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:44:46,095 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-06-05 04:44:46,133 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 04:44:46,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1452131691] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:46,133 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:44:46,133 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-06-05 04:44:46,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935548859] [2021-06-05 04:44:46,133 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 04:44:46,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:44:46,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 04:44:46,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=448, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:44:46,133 INFO L87 Difference]: Start difference. First operand 269 states and 589 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:46,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:44:46,524 INFO L93 Difference]: Finished difference Result 303 states and 652 transitions. [2021-06-05 04:44:46,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 04:44:46,524 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:44:46,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:44:46,524 INFO L225 Difference]: With dead ends: 303 [2021-06-05 04:44:46,524 INFO L226 Difference]: Without dead ends: 290 [2021-06-05 04:44:46,524 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 476.1ms TimeCoverageRelationStatistics Valid=85, Invalid=727, Unknown=0, NotChecked=0, Total=812 [2021-06-05 04:44:46,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2021-06-05 04:44:46,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 274. [2021-06-05 04:44:46,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 273 states have (on average 2.1941391941391943) internal successors, (599), 273 states have internal predecessors, (599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:46,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 599 transitions. [2021-06-05 04:44:46,526 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 599 transitions. Word has length 20 [2021-06-05 04:44:46,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:44:46,527 INFO L482 AbstractCegarLoop]: Abstraction has 274 states and 599 transitions. [2021-06-05 04:44:46,527 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:46,527 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 599 transitions. [2021-06-05 04:44:46,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:44:46,527 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:44:46,527 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:44:46,727 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3994,855 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:44:46,727 INFO L430 AbstractCegarLoop]: === Iteration 861 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:44:46,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:44:46,728 INFO L82 PathProgramCache]: Analyzing trace with hash 1230820270, now seen corresponding path program 855 times [2021-06-05 04:44:46,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:44:46,728 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475792323] [2021-06-05 04:44:46,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:44:46,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:44:46,952 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:44:46,952 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:44:46,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475792323] [2021-06-05 04:44:46,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475792323] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:46,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414441716] [2021-06-05 04:44:46,953 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 856 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 856 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:44:46,979 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 04:44:46,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:44:46,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 04:44:46,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:44:47,108 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:47,108 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:47,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:44:47,109 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:44:47,111 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:47,112 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:47,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:44:47,113 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:44:47,115 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:47,115 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:47,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:44:47,116 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:44:47,134 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:47,134 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 19 treesize of output 15 [2021-06-05 04:44:47,135 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:44:47,194 INFO L628 ElimStorePlain]: treesize reduction 77, result has 45.4 percent of original size [2021-06-05 04:44:47,197 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:47,197 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:47,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 04:44:47,199 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:44:47,201 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:47,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 04:44:47,202 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:44:47,222 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:44:47,223 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 04:44:47,223 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:161, output treesize:32 [2021-06-05 04:44:47,311 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:44:47,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1414441716] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:47,312 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:44:47,312 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 04:44:47,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497904574] [2021-06-05 04:44:47,312 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 04:44:47,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:44:47,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 04:44:47,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=491, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:44:47,312 INFO L87 Difference]: Start difference. First operand 274 states and 599 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:47,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:44:47,946 INFO L93 Difference]: Finished difference Result 326 states and 687 transitions. [2021-06-05 04:44:47,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 04:44:47,946 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 04:44:47,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:44:47,946 INFO L225 Difference]: With dead ends: 326 [2021-06-05 04:44:47,946 INFO L226 Difference]: Without dead ends: 308 [2021-06-05 04:44:47,947 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 721.3ms TimeCoverageRelationStatistics Valid=106, Invalid=950, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 04:44:47,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2021-06-05 04:44:47,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 274. [2021-06-05 04:44:47,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 273 states have (on average 2.1941391941391943) internal successors, (599), 273 states have internal predecessors, (599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:47,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 599 transitions. [2021-06-05 04:44:47,949 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 599 transitions. Word has length 20 [2021-06-05 04:44:47,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:44:47,949 INFO L482 AbstractCegarLoop]: Abstraction has 274 states and 599 transitions. [2021-06-05 04:44:47,949 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 04:44:47,949 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 599 transitions. [2021-06-05 04:44:47,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:44:47,949 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:44:47,949 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:44:48,149 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3995,856 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:44:48,150 INFO L430 AbstractCegarLoop]: === Iteration 862 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:44:48,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:44:48,150 INFO L82 PathProgramCache]: Analyzing trace with hash -915350490, now seen corresponding path program 856 times [2021-06-05 04:44:48,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:44:48,150 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904722638] [2021-06-05 04:44:48,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:44:48,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:44:48,376 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 04:44:48,376 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:44:48,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904722638] [2021-06-05 04:44:48,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904722638] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:48,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398510022] [2021-06-05 04:44:48,376 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 857 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 857 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:44:48,402 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:44:48,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:44:48,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:44:48,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:44:48,585 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:48,585 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:48,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:44:48,586 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:44:48,589 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:48,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:44:48,590 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:44:48,649 INFO L628 ElimStorePlain]: treesize reduction 88, result has 45.0 percent of original size [2021-06-05 04:44:48,652 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:48,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:44:48,653 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:44:48,680 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:44:48,683 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:48,683 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 10 treesize of output 6 [2021-06-05 04:44:48,684 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:44:48,706 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:44:48,708 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:48,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:44:48,710 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:44:48,730 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:44:48,731 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 04:44:48,732 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-06-05 04:44:48,821 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 04:44:48,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [398510022] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:48,821 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:44:48,821 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 04:44:48,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294896372] [2021-06-05 04:44:48,821 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 04:44:48,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:44:48,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 04:44:48,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:44:48,821 INFO L87 Difference]: Start difference. First operand 274 states and 599 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:49,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:44:49,453 INFO L93 Difference]: Finished difference Result 341 states and 721 transitions. [2021-06-05 04:44:49,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 04:44:49,454 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 04:44:49,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:44:49,454 INFO L225 Difference]: With dead ends: 341 [2021-06-05 04:44:49,454 INFO L226 Difference]: Without dead ends: 322 [2021-06-05 04:44:49,454 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 781.5ms TimeCoverageRelationStatistics Valid=126, Invalid=996, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 04:44:49,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2021-06-05 04:44:49,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 273. [2021-06-05 04:44:49,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 272 states have (on average 2.1948529411764706) internal successors, (597), 272 states have internal predecessors, (597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:49,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 597 transitions. [2021-06-05 04:44:49,460 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 597 transitions. Word has length 20 [2021-06-05 04:44:49,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:44:49,460 INFO L482 AbstractCegarLoop]: Abstraction has 273 states and 597 transitions. [2021-06-05 04:44:49,460 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 04:44:49,460 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 597 transitions. [2021-06-05 04:44:49,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:44:49,460 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:44:49,460 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:44:49,660 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 857 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3999 [2021-06-05 04:44:49,661 INFO L430 AbstractCegarLoop]: === Iteration 863 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:44:49,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:44:49,661 INFO L82 PathProgramCache]: Analyzing trace with hash 1272832686, now seen corresponding path program 857 times [2021-06-05 04:44:49,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:44:49,661 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505805976] [2021-06-05 04:44:49,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:44:49,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:44:49,881 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 04:44:49,881 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:44:49,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505805976] [2021-06-05 04:44:49,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505805976] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:49,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1139756027] [2021-06-05 04:44:49,881 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 858 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 858 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:44:49,907 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:44:49,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:44:49,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:44:49,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:44:50,089 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:50,090 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:50,090 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 19 treesize of output 15 [2021-06-05 04:44:50,091 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:44:50,094 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:50,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:44:50,094 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:44:50,156 INFO L628 ElimStorePlain]: treesize reduction 88, result has 45.0 percent of original size [2021-06-05 04:44:50,158 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:50,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:44:50,160 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:44:50,183 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:44:50,186 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:50,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:44:50,187 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:44:50,208 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:44:50,211 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:50,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:44:50,212 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:44:50,233 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:44:50,234 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 04:44:50,234 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-06-05 04:44:50,317 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 04:44:50,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1139756027] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:50,318 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:44:50,318 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 04:44:50,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568322548] [2021-06-05 04:44:50,318 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 04:44:50,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:44:50,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 04:44:50,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:44:50,318 INFO L87 Difference]: Start difference. First operand 273 states and 597 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:51,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:44:51,064 INFO L93 Difference]: Finished difference Result 373 states and 772 transitions. [2021-06-05 04:44:51,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 04:44:51,064 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 04:44:51,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:44:51,065 INFO L225 Difference]: With dead ends: 373 [2021-06-05 04:44:51,065 INFO L226 Difference]: Without dead ends: 340 [2021-06-05 04:44:51,065 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 897.1ms TimeCoverageRelationStatistics Valid=129, Invalid=927, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 04:44:51,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2021-06-05 04:44:51,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 273. [2021-06-05 04:44:51,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 272 states have (on average 2.1948529411764706) internal successors, (597), 272 states have internal predecessors, (597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:51,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 597 transitions. [2021-06-05 04:44:51,067 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 597 transitions. Word has length 20 [2021-06-05 04:44:51,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:44:51,067 INFO L482 AbstractCegarLoop]: Abstraction has 273 states and 597 transitions. [2021-06-05 04:44:51,067 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 04:44:51,067 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 597 transitions. [2021-06-05 04:44:51,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:44:51,067 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:44:51,067 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:44:51,268 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4004,858 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:44:51,268 INFO L430 AbstractCegarLoop]: === Iteration 864 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:44:51,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:44:51,268 INFO L82 PathProgramCache]: Analyzing trace with hash 387034406, now seen corresponding path program 858 times [2021-06-05 04:44:51,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:44:51,268 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656672546] [2021-06-05 04:44:51,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:44:51,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:44:51,497 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:44:51,497 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:44:51,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656672546] [2021-06-05 04:44:51,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656672546] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:51,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902266545] [2021-06-05 04:44:51,497 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 859 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 859 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:44:51,522 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:44:51,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:44:51,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:44:51,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:44:51,735 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:51,736 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:51,736 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 19 treesize of output 15 [2021-06-05 04:44:51,736 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:44:51,739 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:51,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:44:51,740 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:44:51,801 INFO L628 ElimStorePlain]: treesize reduction 88, result has 46.0 percent of original size [2021-06-05 04:44:51,804 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:51,804 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 13 treesize of output 9 [2021-06-05 04:44:51,805 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:44:51,829 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:44:51,831 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:51,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:44:51,832 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:44:51,854 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:44:51,857 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:51,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 04:44:51,858 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:44:51,879 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:44:51,880 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:44:51,880 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-06-05 04:44:51,968 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 04:44:51,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [902266545] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:51,968 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:44:51,968 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 04:44:51,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990747018] [2021-06-05 04:44:51,969 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 04:44:51,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:44:51,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 04:44:51,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=491, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:44:51,969 INFO L87 Difference]: Start difference. First operand 273 states and 597 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:53,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:44:53,008 INFO L93 Difference]: Finished difference Result 396 states and 813 transitions. [2021-06-05 04:44:53,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 04:44:53,009 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 04:44:53,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:44:53,009 INFO L225 Difference]: With dead ends: 396 [2021-06-05 04:44:53,009 INFO L226 Difference]: Without dead ends: 356 [2021-06-05 04:44:53,009 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 1149.6ms TimeCoverageRelationStatistics Valid=158, Invalid=1102, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 04:44:53,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2021-06-05 04:44:53,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 273. [2021-06-05 04:44:53,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 272 states have (on average 2.1948529411764706) internal successors, (597), 272 states have internal predecessors, (597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:53,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 597 transitions. [2021-06-05 04:44:53,012 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 597 transitions. Word has length 20 [2021-06-05 04:44:53,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:44:53,012 INFO L482 AbstractCegarLoop]: Abstraction has 273 states and 597 transitions. [2021-06-05 04:44:53,012 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 04:44:53,012 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 597 transitions. [2021-06-05 04:44:53,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:44:53,012 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:44:53,012 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:44:53,212 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4009,859 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:44:53,213 INFO L430 AbstractCegarLoop]: === Iteration 865 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:44:53,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:44:53,213 INFO L82 PathProgramCache]: Analyzing trace with hash -1302908498, now seen corresponding path program 859 times [2021-06-05 04:44:53,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:44:53,213 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749246875] [2021-06-05 04:44:53,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:44:53,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:44:53,436 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:44:53,436 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:44:53,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749246875] [2021-06-05 04:44:53,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749246875] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:53,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903726107] [2021-06-05 04:44:53,436 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 860 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 860 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:44:53,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:44:53,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:44:53,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:44:53,708 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:53,708 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:53,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:44:53,709 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:44:53,712 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:53,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:44:53,713 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:44:53,774 INFO L628 ElimStorePlain]: treesize reduction 88, result has 45.0 percent of original size [2021-06-05 04:44:53,776 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:53,777 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 10 treesize of output 6 [2021-06-05 04:44:53,778 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:44:53,801 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:44:53,804 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:53,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:44:53,805 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:44:53,826 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:44:53,829 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:53,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 04:44:53,830 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:44:53,851 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:44:53,852 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:44:53,852 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-06-05 04:44:53,935 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 04:44:53,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [903726107] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:53,935 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:44:53,936 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-06-05 04:44:53,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887077987] [2021-06-05 04:44:53,936 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 04:44:53,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:44:53,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 04:44:53,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:44:53,936 INFO L87 Difference]: Start difference. First operand 273 states and 597 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:54,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:44:54,492 INFO L93 Difference]: Finished difference Result 336 states and 711 transitions. [2021-06-05 04:44:54,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 04:44:54,492 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:44:54,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:44:54,493 INFO L225 Difference]: With dead ends: 336 [2021-06-05 04:44:54,493 INFO L226 Difference]: Without dead ends: 317 [2021-06-05 04:44:54,493 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 634.7ms TimeCoverageRelationStatistics Valid=92, Invalid=720, Unknown=0, NotChecked=0, Total=812 [2021-06-05 04:44:54,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2021-06-05 04:44:54,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 273. [2021-06-05 04:44:54,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 272 states have (on average 2.1948529411764706) internal successors, (597), 272 states have internal predecessors, (597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:54,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 597 transitions. [2021-06-05 04:44:54,495 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 597 transitions. Word has length 20 [2021-06-05 04:44:54,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:44:54,495 INFO L482 AbstractCegarLoop]: Abstraction has 273 states and 597 transitions. [2021-06-05 04:44:54,495 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:54,495 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 597 transitions. [2021-06-05 04:44:54,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:44:54,495 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:44:54,495 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:44:54,695 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4014,860 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:44:54,696 INFO L430 AbstractCegarLoop]: === Iteration 866 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:44:54,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:44:54,696 INFO L82 PathProgramCache]: Analyzing trace with hash 1245196386, now seen corresponding path program 860 times [2021-06-05 04:44:54,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:44:54,696 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668912364] [2021-06-05 04:44:54,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:44:54,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:44:54,883 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 04:44:54,883 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:44:54,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668912364] [2021-06-05 04:44:54,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668912364] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:54,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164815841] [2021-06-05 04:44:54,883 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 861 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 861 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:44:54,909 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:44:54,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:44:54,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:44:54,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:44:55,059 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:55,059 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:55,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 04:44:55,060 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:44:55,062 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:55,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 04:44:55,063 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:44:55,086 INFO L628 ElimStorePlain]: treesize reduction 48, result has 36.0 percent of original size [2021-06-05 04:44:55,087 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:55,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:44:55,089 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:44:55,095 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:44:55,096 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:44:55,096 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-06-05 04:44:55,134 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:44:55,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [164815841] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:55,135 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:44:55,135 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 22 [2021-06-05 04:44:55,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83630715] [2021-06-05 04:44:55,135 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 04:44:55,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:44:55,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 04:44:55,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=406, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:44:55,135 INFO L87 Difference]: Start difference. First operand 273 states and 597 transitions. Second operand has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:55,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:44:55,546 INFO L93 Difference]: Finished difference Result 301 states and 642 transitions. [2021-06-05 04:44:55,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 04:44:55,546 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:44:55,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:44:55,547 INFO L225 Difference]: With dead ends: 301 [2021-06-05 04:44:55,547 INFO L226 Difference]: Without dead ends: 285 [2021-06-05 04:44:55,547 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 479.9ms TimeCoverageRelationStatistics Valid=91, Invalid=779, Unknown=0, NotChecked=0, Total=870 [2021-06-05 04:44:55,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2021-06-05 04:44:55,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 274. [2021-06-05 04:44:55,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 273 states have (on average 2.1941391941391943) internal successors, (599), 273 states have internal predecessors, (599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:55,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 599 transitions. [2021-06-05 04:44:55,549 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 599 transitions. Word has length 20 [2021-06-05 04:44:55,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:44:55,549 INFO L482 AbstractCegarLoop]: Abstraction has 274 states and 599 transitions. [2021-06-05 04:44:55,549 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:55,549 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 599 transitions. [2021-06-05 04:44:55,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:44:55,549 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:44:55,549 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:44:55,749 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4019,861 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:44:55,750 INFO L430 AbstractCegarLoop]: === Iteration 867 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:44:55,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:44:55,750 INFO L82 PathProgramCache]: Analyzing trace with hash 2107201450, now seen corresponding path program 861 times [2021-06-05 04:44:55,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:44:55,750 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041407409] [2021-06-05 04:44:55,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:44:55,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:44:55,915 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 04:44:55,915 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:44:55,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041407409] [2021-06-05 04:44:55,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041407409] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:55,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913865443] [2021-06-05 04:44:55,916 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 862 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 862 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:44:55,942 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 04:44:55,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:44:55,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 04:44:55,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:44:56,082 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:56,083 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:56,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:44:56,083 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:44:56,090 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:56,090 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 19 treesize of output 15 [2021-06-05 04:44:56,091 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:44:56,109 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:44:56,111 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:56,111 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:56,112 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 10 treesize of output 6 [2021-06-05 04:44:56,113 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:44:56,115 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:56,115 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 13 treesize of output 9 [2021-06-05 04:44:56,116 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:44:56,133 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:44:56,134 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:44:56,134 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:71, output treesize:29 [2021-06-05 04:44:56,189 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 04:44:56,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1913865443] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:56,189 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:44:56,189 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-06-05 04:44:56,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99318913] [2021-06-05 04:44:56,190 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 04:44:56,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:44:56,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 04:44:56,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:44:56,190 INFO L87 Difference]: Start difference. First operand 274 states and 599 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:56,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:44:56,997 INFO L93 Difference]: Finished difference Result 305 states and 654 transitions. [2021-06-05 04:44:56,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 04:44:56,998 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 04:44:56,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:44:56,998 INFO L225 Difference]: With dead ends: 305 [2021-06-05 04:44:56,998 INFO L226 Difference]: Without dead ends: 292 [2021-06-05 04:44:56,998 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 737.1ms TimeCoverageRelationStatistics Valid=124, Invalid=1208, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 04:44:56,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2021-06-05 04:44:57,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 275. [2021-06-05 04:44:57,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 274 states have (on average 2.1934306569343067) internal successors, (601), 274 states have internal predecessors, (601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:57,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 601 transitions. [2021-06-05 04:44:57,000 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 601 transitions. Word has length 20 [2021-06-05 04:44:57,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:44:57,000 INFO L482 AbstractCegarLoop]: Abstraction has 275 states and 601 transitions. [2021-06-05 04:44:57,001 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 04:44:57,001 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 601 transitions. [2021-06-05 04:44:57,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:44:57,001 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:44:57,001 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:44:57,201 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 862 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4020 [2021-06-05 04:44:57,201 INFO L430 AbstractCegarLoop]: === Iteration 868 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:44:57,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:44:57,201 INFO L82 PathProgramCache]: Analyzing trace with hash -1051580574, now seen corresponding path program 862 times [2021-06-05 04:44:57,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:44:57,202 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877790021] [2021-06-05 04:44:57,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:44:57,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:44:57,438 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 04:44:57,438 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:44:57,438 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877790021] [2021-06-05 04:44:57,438 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877790021] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:57,438 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057456896] [2021-06-05 04:44:57,438 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 863 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 863 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:44:57,463 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:44:57,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:44:57,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:44:57,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:44:57,596 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:57,597 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:57,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:44:57,598 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:44:57,600 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:57,601 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:57,601 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 19 treesize of output 15 [2021-06-05 04:44:57,601 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:44:57,604 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:57,604 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:57,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:44:57,605 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:44:57,607 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:57,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:44:57,608 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:44:57,663 INFO L628 ElimStorePlain]: treesize reduction 77, result has 45.4 percent of original size [2021-06-05 04:44:57,665 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:57,666 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:57,666 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 10 treesize of output 6 [2021-06-05 04:44:57,667 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:44:57,669 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:57,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:44:57,671 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:44:57,693 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:44:57,694 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 04:44:57,694 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:173, output treesize:38 [2021-06-05 04:44:57,775 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 04:44:57,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1057456896] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:57,776 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:44:57,776 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-06-05 04:44:57,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461212544] [2021-06-05 04:44:57,776 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 04:44:57,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:44:57,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 04:44:57,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:44:57,776 INFO L87 Difference]: Start difference. First operand 275 states and 601 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:58,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:44:58,550 INFO L93 Difference]: Finished difference Result 305 states and 652 transitions. [2021-06-05 04:44:58,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 04:44:58,550 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 04:44:58,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:44:58,550 INFO L225 Difference]: With dead ends: 305 [2021-06-05 04:44:58,551 INFO L226 Difference]: Without dead ends: 293 [2021-06-05 04:44:58,551 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 799.9ms TimeCoverageRelationStatistics Valid=131, Invalid=1201, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 04:44:58,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2021-06-05 04:44:58,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 273. [2021-06-05 04:44:58,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 272 states have (on average 2.1948529411764706) internal successors, (597), 272 states have internal predecessors, (597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:58,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 597 transitions. [2021-06-05 04:44:58,553 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 597 transitions. Word has length 20 [2021-06-05 04:44:58,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:44:58,553 INFO L482 AbstractCegarLoop]: Abstraction has 273 states and 597 transitions. [2021-06-05 04:44:58,553 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 04:44:58,553 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 597 transitions. [2021-06-05 04:44:58,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:44:58,553 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:44:58,553 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:44:58,753 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 863 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4023 [2021-06-05 04:44:58,754 INFO L430 AbstractCegarLoop]: === Iteration 869 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:44:58,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:44:58,754 INFO L82 PathProgramCache]: Analyzing trace with hash 417330, now seen corresponding path program 863 times [2021-06-05 04:44:58,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:44:58,754 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615981380] [2021-06-05 04:44:58,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:44:58,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:44:58,964 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:44:58,964 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:44:58,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615981380] [2021-06-05 04:44:58,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615981380] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:58,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196341934] [2021-06-05 04:44:58,965 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 864 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 864 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:44:58,991 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 04:44:58,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:44:58,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:44:58,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:44:59,128 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:59,129 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:59,129 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 27 treesize of output 21 [2021-06-05 04:44:59,130 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:44:59,132 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:59,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 04:44:59,133 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:44:59,155 INFO L628 ElimStorePlain]: treesize reduction 48, result has 36.0 percent of original size [2021-06-05 04:44:59,157 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:44:59,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:44:59,158 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:44:59,165 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:44:59,165 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 04:44:59,165 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-06-05 04:44:59,205 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 04:44:59,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [196341934] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:59,205 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:44:59,205 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-06-05 04:44:59,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562073682] [2021-06-05 04:44:59,205 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 04:44:59,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:44:59,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 04:44:59,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:44:59,205 INFO L87 Difference]: Start difference. First operand 273 states and 597 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:59,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:44:59,620 INFO L93 Difference]: Finished difference Result 297 states and 635 transitions. [2021-06-05 04:44:59,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:44:59,620 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 04:44:59,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:44:59,620 INFO L225 Difference]: With dead ends: 297 [2021-06-05 04:44:59,620 INFO L226 Difference]: Without dead ends: 284 [2021-06-05 04:44:59,620 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 505.6ms TimeCoverageRelationStatistics Valid=97, Invalid=773, Unknown=0, NotChecked=0, Total=870 [2021-06-05 04:44:59,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2021-06-05 04:44:59,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 275. [2021-06-05 04:44:59,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 274 states have (on average 2.1934306569343067) internal successors, (601), 274 states have internal predecessors, (601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:44:59,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 601 transitions. [2021-06-05 04:44:59,622 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 601 transitions. Word has length 20 [2021-06-05 04:44:59,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:44:59,622 INFO L482 AbstractCegarLoop]: Abstraction has 275 states and 601 transitions. [2021-06-05 04:44:59,622 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 04:44:59,623 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 601 transitions. [2021-06-05 04:44:59,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:44:59,623 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:44:59,623 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:44:59,823 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 864 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4026 [2021-06-05 04:44:59,823 INFO L430 AbstractCegarLoop]: === Iteration 870 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:44:59,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:44:59,823 INFO L82 PathProgramCache]: Analyzing trace with hash 1136602602, now seen corresponding path program 864 times [2021-06-05 04:44:59,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:44:59,823 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793159160] [2021-06-05 04:44:59,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:44:59,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:00,036 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 04:45:00,036 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:45:00,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793159160] [2021-06-05 04:45:00,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793159160] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:00,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8860691] [2021-06-05 04:45:00,036 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 865 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 865 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:45:00,063 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 04:45:00,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:45:00,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 04:45:00,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:45:00,176 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:00,176 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:00,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:45:00,177 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:00,179 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:00,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:45:00,180 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:00,201 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:45:00,203 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:00,203 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:00,203 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 13 treesize of output 9 [2021-06-05 04:45:00,205 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:45:00,207 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:00,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:45:00,208 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:45:00,228 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:45:00,229 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 04:45:00,229 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:35 [2021-06-05 04:45:00,320 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 04:45:00,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [8860691] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:00,320 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:45:00,320 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-06-05 04:45:00,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920439123] [2021-06-05 04:45:00,320 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 04:45:00,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:45:00,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 04:45:00,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=447, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:45:00,321 INFO L87 Difference]: Start difference. First operand 275 states and 601 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:00,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:45:00,882 INFO L93 Difference]: Finished difference Result 298 states and 643 transitions. [2021-06-05 04:45:00,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 04:45:00,882 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 04:45:00,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:45:00,883 INFO L225 Difference]: With dead ends: 298 [2021-06-05 04:45:00,883 INFO L226 Difference]: Without dead ends: 291 [2021-06-05 04:45:00,883 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 683.2ms TimeCoverageRelationStatistics Valid=120, Invalid=1002, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 04:45:00,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2021-06-05 04:45:00,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 274. [2021-06-05 04:45:00,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 273 states have (on average 2.1941391941391943) internal successors, (599), 273 states have internal predecessors, (599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:00,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 599 transitions. [2021-06-05 04:45:00,885 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 599 transitions. Word has length 20 [2021-06-05 04:45:00,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:45:00,885 INFO L482 AbstractCegarLoop]: Abstraction has 274 states and 599 transitions. [2021-06-05 04:45:00,885 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 04:45:00,885 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 599 transitions. [2021-06-05 04:45:00,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:45:00,885 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:45:00,885 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:45:01,085 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4027,865 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:45:01,086 INFO L430 AbstractCegarLoop]: === Iteration 871 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:45:01,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:45:01,086 INFO L82 PathProgramCache]: Analyzing trace with hash -1009568158, now seen corresponding path program 865 times [2021-06-05 04:45:01,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:45:01,086 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505049967] [2021-06-05 04:45:01,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:45:01,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:01,301 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:01,302 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:45:01,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505049967] [2021-06-05 04:45:01,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505049967] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:01,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631213284] [2021-06-05 04:45:01,302 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 866 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 866 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:45:01,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:01,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:45:01,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:45:01,468 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:01,469 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:01,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:45:01,470 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:01,473 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:01,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:45:01,473 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:01,536 INFO L628 ElimStorePlain]: treesize reduction 88, result has 46.0 percent of original size [2021-06-05 04:45:01,539 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:01,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 04:45:01,540 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:45:01,564 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:45:01,567 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:01,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:45:01,568 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:01,591 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:45:01,594 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:01,594 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 13 treesize of output 9 [2021-06-05 04:45:01,595 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:45:01,617 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:45:01,619 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 04:45:01,619 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-06-05 04:45:01,709 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 04:45:01,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1631213284] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:01,709 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:45:01,709 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-06-05 04:45:01,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753117686] [2021-06-05 04:45:01,709 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 04:45:01,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:45:01,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 04:45:01,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:45:01,710 INFO L87 Difference]: Start difference. First operand 274 states and 599 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:02,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:45:02,598 INFO L93 Difference]: Finished difference Result 359 states and 746 transitions. [2021-06-05 04:45:02,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 04:45:02,598 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 04:45:02,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:45:02,599 INFO L225 Difference]: With dead ends: 359 [2021-06-05 04:45:02,599 INFO L226 Difference]: Without dead ends: 333 [2021-06-05 04:45:02,599 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 871.3ms TimeCoverageRelationStatistics Valid=149, Invalid=1183, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 04:45:02,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2021-06-05 04:45:02,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 274. [2021-06-05 04:45:02,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 273 states have (on average 2.1941391941391943) internal successors, (599), 273 states have internal predecessors, (599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:02,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 599 transitions. [2021-06-05 04:45:02,601 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 599 transitions. Word has length 20 [2021-06-05 04:45:02,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:45:02,601 INFO L482 AbstractCegarLoop]: Abstraction has 274 states and 599 transitions. [2021-06-05 04:45:02,601 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 04:45:02,601 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 599 transitions. [2021-06-05 04:45:02,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:45:02,601 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:45:02,602 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:45:02,802 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4032,866 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:45:02,802 INFO L430 AbstractCegarLoop]: === Iteration 872 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:45:02,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:45:02,802 INFO L82 PathProgramCache]: Analyzing trace with hash -885380950, now seen corresponding path program 866 times [2021-06-05 04:45:02,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:45:02,803 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924272042] [2021-06-05 04:45:02,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:45:02,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:03,007 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 04:45:03,007 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:45:03,007 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924272042] [2021-06-05 04:45:03,007 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924272042] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:03,007 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715412388] [2021-06-05 04:45:03,007 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 867 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 867 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:45:03,032 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:45:03,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:45:03,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:45:03,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:45:03,175 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:03,175 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:03,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 04:45:03,176 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:03,178 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:03,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 04:45:03,179 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:03,201 INFO L628 ElimStorePlain]: treesize reduction 36, result has 42.9 percent of original size [2021-06-05 04:45:03,203 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:03,203 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 10 treesize of output 6 [2021-06-05 04:45:03,204 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:45:03,211 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:45:03,212 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 04:45:03,212 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-06-05 04:45:03,249 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:03,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1715412388] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:03,249 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:45:03,249 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 22 [2021-06-05 04:45:03,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933398368] [2021-06-05 04:45:03,249 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 04:45:03,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:45:03,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 04:45:03,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=405, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:45:03,250 INFO L87 Difference]: Start difference. First operand 274 states and 599 transitions. Second operand has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:03,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:45:03,776 INFO L93 Difference]: Finished difference Result 308 states and 660 transitions. [2021-06-05 04:45:03,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 04:45:03,777 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:45:03,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:45:03,777 INFO L225 Difference]: With dead ends: 308 [2021-06-05 04:45:03,777 INFO L226 Difference]: Without dead ends: 295 [2021-06-05 04:45:03,777 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 525.9ms TimeCoverageRelationStatistics Valid=95, Invalid=775, Unknown=0, NotChecked=0, Total=870 [2021-06-05 04:45:03,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2021-06-05 04:45:03,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 277. [2021-06-05 04:45:03,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 276 states have (on average 2.1920289855072466) internal successors, (605), 276 states have internal predecessors, (605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:03,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 605 transitions. [2021-06-05 04:45:03,780 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 605 transitions. Word has length 20 [2021-06-05 04:45:03,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:45:03,780 INFO L482 AbstractCegarLoop]: Abstraction has 277 states and 605 transitions. [2021-06-05 04:45:03,780 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:03,780 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 605 transitions. [2021-06-05 04:45:03,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:45:03,780 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:45:03,780 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:45:03,980 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4037,867 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:45:03,981 INFO L430 AbstractCegarLoop]: === Iteration 873 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:45:03,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:45:03,981 INFO L82 PathProgramCache]: Analyzing trace with hash 250804322, now seen corresponding path program 867 times [2021-06-05 04:45:03,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:45:03,981 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918904779] [2021-06-05 04:45:03,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:45:03,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:04,149 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 04:45:04,149 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:45:04,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918904779] [2021-06-05 04:45:04,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918904779] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:04,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445472935] [2021-06-05 04:45:04,149 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 868 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 868 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:45:04,177 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 04:45:04,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:45:04,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 04:45:04,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:45:04,296 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:04,297 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:04,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:45:04,298 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:04,300 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:04,300 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:04,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:45:04,301 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:04,304 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:04,304 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:04,304 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 19 treesize of output 15 [2021-06-05 04:45:04,305 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:04,307 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:04,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:45:04,308 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:04,357 INFO L628 ElimStorePlain]: treesize reduction 77, result has 45.4 percent of original size [2021-06-05 04:45:04,359 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:04,359 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:04,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 04:45:04,361 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:45:04,363 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:04,363 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 13 treesize of output 9 [2021-06-05 04:45:04,365 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:45:04,388 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:45:04,389 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:45:04,389 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:161, output treesize:32 [2021-06-05 04:45:04,482 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:04,483 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [445472935] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:04,483 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:45:04,483 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 22 [2021-06-05 04:45:04,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956293801] [2021-06-05 04:45:04,483 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 04:45:04,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:45:04,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 04:45:04,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:45:04,483 INFO L87 Difference]: Start difference. First operand 277 states and 605 transitions. Second operand has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:05,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:45:05,059 INFO L93 Difference]: Finished difference Result 306 states and 654 transitions. [2021-06-05 04:45:05,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 04:45:05,059 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:45:05,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:45:05,060 INFO L225 Difference]: With dead ends: 306 [2021-06-05 04:45:05,060 INFO L226 Difference]: Without dead ends: 294 [2021-06-05 04:45:05,060 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 644.3ms TimeCoverageRelationStatistics Valid=107, Invalid=949, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 04:45:05,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2021-06-05 04:45:05,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 276. [2021-06-05 04:45:05,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 275 states have (on average 2.192727272727273) internal successors, (603), 275 states have internal predecessors, (603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:05,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 603 transitions. [2021-06-05 04:45:05,062 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 603 transitions. Word has length 20 [2021-06-05 04:45:05,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:45:05,062 INFO L482 AbstractCegarLoop]: Abstraction has 276 states and 603 transitions. [2021-06-05 04:45:05,062 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:05,062 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 603 transitions. [2021-06-05 04:45:05,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:45:05,062 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:45:05,063 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:45:05,263 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4038,868 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:45:05,264 INFO L430 AbstractCegarLoop]: === Iteration 874 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:45:05,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:45:05,264 INFO L82 PathProgramCache]: Analyzing trace with hash -1895366438, now seen corresponding path program 868 times [2021-06-05 04:45:05,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:45:05,264 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501705129] [2021-06-05 04:45:05,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:45:05,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:05,466 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 04:45:05,466 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:45:05,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501705129] [2021-06-05 04:45:05,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501705129] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:05,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126962285] [2021-06-05 04:45:05,467 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 869 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 869 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:45:05,492 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:45:05,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:45:05,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:45:05,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:45:05,632 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:05,633 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:05,633 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 19 treesize of output 15 [2021-06-05 04:45:05,634 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:05,637 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:05,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:45:05,638 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:05,702 INFO L628 ElimStorePlain]: treesize reduction 88, result has 45.0 percent of original size [2021-06-05 04:45:05,704 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:05,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:45:05,706 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:05,728 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:45:05,730 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:05,730 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 10 treesize of output 6 [2021-06-05 04:45:05,732 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:45:05,753 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:45:05,756 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:05,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 04:45:05,757 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:45:05,778 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:45:05,779 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 04:45:05,779 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-06-05 04:45:05,856 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:05,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1126962285] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:05,856 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:45:05,856 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 22 [2021-06-05 04:45:05,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641266116] [2021-06-05 04:45:05,856 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 04:45:05,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:45:05,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 04:45:05,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:45:05,857 INFO L87 Difference]: Start difference. First operand 276 states and 603 transitions. Second operand has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:06,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:45:06,474 INFO L93 Difference]: Finished difference Result 346 states and 730 transitions. [2021-06-05 04:45:06,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 04:45:06,474 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:45:06,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:45:06,474 INFO L225 Difference]: With dead ends: 346 [2021-06-05 04:45:06,474 INFO L226 Difference]: Without dead ends: 327 [2021-06-05 04:45:06,475 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 715.1ms TimeCoverageRelationStatistics Valid=144, Invalid=1046, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 04:45:06,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2021-06-05 04:45:06,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 275. [2021-06-05 04:45:06,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 274 states have (on average 2.1934306569343067) internal successors, (601), 274 states have internal predecessors, (601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:06,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 601 transitions. [2021-06-05 04:45:06,477 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 601 transitions. Word has length 20 [2021-06-05 04:45:06,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:45:06,477 INFO L482 AbstractCegarLoop]: Abstraction has 275 states and 601 transitions. [2021-06-05 04:45:06,477 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:06,477 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 601 transitions. [2021-06-05 04:45:06,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:45:06,477 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:45:06,477 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:45:06,677 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 869 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4042 [2021-06-05 04:45:06,678 INFO L430 AbstractCegarLoop]: === Iteration 875 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:45:06,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:45:06,678 INFO L82 PathProgramCache]: Analyzing trace with hash 292816738, now seen corresponding path program 869 times [2021-06-05 04:45:06,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:45:06,678 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522014192] [2021-06-05 04:45:06,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:45:06,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:06,909 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:06,909 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:45:06,909 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522014192] [2021-06-05 04:45:06,909 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522014192] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:06,909 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35866998] [2021-06-05 04:45:06,909 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 870 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 870 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:45:06,935 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:45:06,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:45:06,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:45:06,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:45:07,112 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:07,112 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:07,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:45:07,118 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:07,123 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:07,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:45:07,124 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:07,204 INFO L628 ElimStorePlain]: treesize reduction 85, result has 45.9 percent of original size [2021-06-05 04:45:07,208 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:07,208 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 10 treesize of output 6 [2021-06-05 04:45:07,210 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:45:07,244 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:45:07,247 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:07,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:45:07,248 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:07,275 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:45:07,278 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:07,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:45:07,279 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:45:07,300 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:45:07,302 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 04:45:07,302 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-06-05 04:45:07,394 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:07,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [35866998] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:07,395 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:45:07,395 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-06-05 04:45:07,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563385695] [2021-06-05 04:45:07,395 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 04:45:07,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:45:07,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 04:45:07,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:45:07,395 INFO L87 Difference]: Start difference. First operand 275 states and 601 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:08,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:45:08,190 INFO L93 Difference]: Finished difference Result 355 states and 748 transitions. [2021-06-05 04:45:08,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 04:45:08,191 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 04:45:08,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:45:08,191 INFO L225 Difference]: With dead ends: 355 [2021-06-05 04:45:08,191 INFO L226 Difference]: Without dead ends: 336 [2021-06-05 04:45:08,191 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 861.7ms TimeCoverageRelationStatistics Valid=142, Invalid=1118, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 04:45:08,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2021-06-05 04:45:08,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 274. [2021-06-05 04:45:08,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 273 states have (on average 2.1941391941391943) internal successors, (599), 273 states have internal predecessors, (599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:08,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 599 transitions. [2021-06-05 04:45:08,194 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 599 transitions. Word has length 20 [2021-06-05 04:45:08,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:45:08,194 INFO L482 AbstractCegarLoop]: Abstraction has 274 states and 599 transitions. [2021-06-05 04:45:08,194 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 04:45:08,194 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 599 transitions. [2021-06-05 04:45:08,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:45:08,194 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:45:08,194 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:45:08,394 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4047,870 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:45:08,394 INFO L430 AbstractCegarLoop]: === Iteration 876 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:45:08,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:45:08,395 INFO L82 PathProgramCache]: Analyzing trace with hash 1719643442, now seen corresponding path program 870 times [2021-06-05 04:45:08,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:45:08,395 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625874707] [2021-06-05 04:45:08,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:45:08,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:08,566 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:08,566 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:45:08,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625874707] [2021-06-05 04:45:08,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625874707] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:08,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1921308360] [2021-06-05 04:45:08,566 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 871 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 871 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:45:08,594 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 04:45:08,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:45:08,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:45:08,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:45:08,742 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:08,743 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:08,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 04:45:08,744 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:08,746 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:08,746 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 27 treesize of output 21 [2021-06-05 04:45:08,747 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:08,769 INFO L628 ElimStorePlain]: treesize reduction 36, result has 42.9 percent of original size [2021-06-05 04:45:08,771 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:08,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:45:08,773 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:45:08,779 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:45:08,780 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 04:45:08,780 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-06-05 04:45:08,814 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 04:45:08,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1921308360] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:08,815 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:45:08,815 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 22 [2021-06-05 04:45:08,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023147420] [2021-06-05 04:45:08,815 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 04:45:08,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:45:08,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 04:45:08,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=405, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:45:08,815 INFO L87 Difference]: Start difference. First operand 274 states and 599 transitions. Second operand has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:09,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:45:09,200 INFO L93 Difference]: Finished difference Result 311 states and 663 transitions. [2021-06-05 04:45:09,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 04:45:09,201 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:45:09,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:45:09,201 INFO L225 Difference]: With dead ends: 311 [2021-06-05 04:45:09,201 INFO L226 Difference]: Without dead ends: 298 [2021-06-05 04:45:09,201 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 481.5ms TimeCoverageRelationStatistics Valid=92, Invalid=778, Unknown=0, NotChecked=0, Total=870 [2021-06-05 04:45:09,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2021-06-05 04:45:09,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 278. [2021-06-05 04:45:09,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 277 states have (on average 2.191335740072202) internal successors, (607), 277 states have internal predecessors, (607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:09,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 607 transitions. [2021-06-05 04:45:09,203 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 607 transitions. Word has length 20 [2021-06-05 04:45:09,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:45:09,203 INFO L482 AbstractCegarLoop]: Abstraction has 278 states and 607 transitions. [2021-06-05 04:45:09,203 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:09,203 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 607 transitions. [2021-06-05 04:45:09,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:45:09,204 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:45:09,204 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:45:09,404 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 871 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4052 [2021-06-05 04:45:09,404 INFO L430 AbstractCegarLoop]: === Iteration 877 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:45:09,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:45:09,404 INFO L82 PathProgramCache]: Analyzing trace with hash -1439138582, now seen corresponding path program 871 times [2021-06-05 04:45:09,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:45:09,404 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322852455] [2021-06-05 04:45:09,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:45:09,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:09,557 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 04:45:09,557 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:45:09,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322852455] [2021-06-05 04:45:09,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322852455] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:09,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1722336050] [2021-06-05 04:45:09,557 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 872 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 872 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:45:09,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:09,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:45:09,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:45:09,703 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:09,704 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:09,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:45:09,705 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:09,709 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:09,710 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:09,710 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 19 treesize of output 15 [2021-06-05 04:45:09,715 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:09,719 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:09,720 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:09,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:45:09,721 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:09,724 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:09,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:45:09,725 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:09,789 INFO L628 ElimStorePlain]: treesize reduction 80, result has 46.7 percent of original size [2021-06-05 04:45:09,791 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:09,792 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:09,792 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 13 treesize of output 9 [2021-06-05 04:45:09,793 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:45:09,795 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:09,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 04:45:09,797 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:45:09,819 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:45:09,820 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 04:45:09,820 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:173, output treesize:38 [2021-06-05 04:45:09,893 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:09,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1722336050] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:09,893 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:45:09,893 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 22 [2021-06-05 04:45:09,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023061603] [2021-06-05 04:45:09,893 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 04:45:09,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:45:09,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 04:45:09,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:45:09,894 INFO L87 Difference]: Start difference. First operand 278 states and 607 transitions. Second operand has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:10,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:45:10,383 INFO L93 Difference]: Finished difference Result 340 states and 714 transitions. [2021-06-05 04:45:10,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 04:45:10,383 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:45:10,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:45:10,384 INFO L225 Difference]: With dead ends: 340 [2021-06-05 04:45:10,384 INFO L226 Difference]: Without dead ends: 321 [2021-06-05 04:45:10,384 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 513.6ms TimeCoverageRelationStatistics Valid=110, Invalid=946, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 04:45:10,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2021-06-05 04:45:10,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 277. [2021-06-05 04:45:10,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 276 states have (on average 2.1920289855072466) internal successors, (605), 276 states have internal predecessors, (605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:10,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 605 transitions. [2021-06-05 04:45:10,386 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 605 transitions. Word has length 20 [2021-06-05 04:45:10,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:45:10,386 INFO L482 AbstractCegarLoop]: Abstraction has 277 states and 605 transitions. [2021-06-05 04:45:10,386 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:10,386 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 605 transitions. [2021-06-05 04:45:10,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:45:10,386 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:45:10,386 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:45:10,587 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 872 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4053 [2021-06-05 04:45:10,587 INFO L430 AbstractCegarLoop]: === Iteration 878 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:45:10,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:45:10,587 INFO L82 PathProgramCache]: Analyzing trace with hash 709657954, now seen corresponding path program 872 times [2021-06-05 04:45:10,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:45:10,587 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119280818] [2021-06-05 04:45:10,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:45:10,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:10,800 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:10,800 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:45:10,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119280818] [2021-06-05 04:45:10,801 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119280818] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:10,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840458121] [2021-06-05 04:45:10,801 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 873 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 873 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:45:10,826 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:45:10,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:45:10,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:45:10,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:45:10,959 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:10,960 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:10,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:45:10,961 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:10,963 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:10,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:45:10,964 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:11,025 INFO L628 ElimStorePlain]: treesize reduction 88, result has 45.0 percent of original size [2021-06-05 04:45:11,028 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:11,028 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 19 treesize of output 15 [2021-06-05 04:45:11,029 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:11,055 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:45:11,058 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:11,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:45:11,059 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:45:11,081 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:45:11,084 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:11,084 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 10 treesize of output 6 [2021-06-05 04:45:11,085 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:45:11,106 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:45:11,107 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 04:45:11,107 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-06-05 04:45:11,187 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 04:45:11,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [840458121] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:11,188 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:45:11,188 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-06-05 04:45:11,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975138797] [2021-06-05 04:45:11,188 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 04:45:11,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:45:11,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 04:45:11,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:45:11,188 INFO L87 Difference]: Start difference. First operand 277 states and 605 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:11,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:45:11,944 INFO L93 Difference]: Finished difference Result 351 states and 740 transitions. [2021-06-05 04:45:11,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 04:45:11,944 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 04:45:11,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:45:11,944 INFO L225 Difference]: With dead ends: 351 [2021-06-05 04:45:11,944 INFO L226 Difference]: Without dead ends: 332 [2021-06-05 04:45:11,945 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 850.7ms TimeCoverageRelationStatistics Valid=148, Invalid=1184, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 04:45:11,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2021-06-05 04:45:11,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 276. [2021-06-05 04:45:11,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 275 states have (on average 2.192727272727273) internal successors, (603), 275 states have internal predecessors, (603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:11,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 603 transitions. [2021-06-05 04:45:11,947 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 603 transitions. Word has length 20 [2021-06-05 04:45:11,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:45:11,947 INFO L482 AbstractCegarLoop]: Abstraction has 276 states and 603 transitions. [2021-06-05 04:45:11,947 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 04:45:11,947 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 603 transitions. [2021-06-05 04:45:11,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:45:11,947 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:45:11,947 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:45:12,147 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 873 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4056 [2021-06-05 04:45:12,148 INFO L430 AbstractCegarLoop]: === Iteration 879 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:45:12,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:45:12,148 INFO L82 PathProgramCache]: Analyzing trace with hash -1397126166, now seen corresponding path program 873 times [2021-06-05 04:45:12,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:45:12,148 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432439075] [2021-06-05 04:45:12,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:45:12,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:12,362 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 04:45:12,363 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:45:12,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432439075] [2021-06-05 04:45:12,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432439075] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:12,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65104465] [2021-06-05 04:45:12,363 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 874 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 874 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:45:12,393 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:45:12,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:45:12,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:45:12,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:45:12,558 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:12,559 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:12,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:45:12,560 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:12,562 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:12,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:45:12,563 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:12,624 INFO L628 ElimStorePlain]: treesize reduction 85, result has 45.9 percent of original size [2021-06-05 04:45:12,627 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:12,627 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 19 treesize of output 15 [2021-06-05 04:45:12,628 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:12,650 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:45:12,652 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:12,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:45:12,654 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:45:12,675 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:45:12,678 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:12,678 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 10 treesize of output 6 [2021-06-05 04:45:12,679 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:45:12,699 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:45:12,700 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 04:45:12,700 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-06-05 04:45:12,782 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:12,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [65104465] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:12,783 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:45:12,783 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-06-05 04:45:12,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905305523] [2021-06-05 04:45:12,783 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 04:45:12,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:45:12,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 04:45:12,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:45:12,783 INFO L87 Difference]: Start difference. First operand 276 states and 603 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:13,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:45:13,709 INFO L93 Difference]: Finished difference Result 400 states and 827 transitions. [2021-06-05 04:45:13,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 04:45:13,709 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 04:45:13,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:45:13,710 INFO L225 Difference]: With dead ends: 400 [2021-06-05 04:45:13,710 INFO L226 Difference]: Without dead ends: 367 [2021-06-05 04:45:13,710 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 998.3ms TimeCoverageRelationStatistics Valid=152, Invalid=1108, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 04:45:13,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2021-06-05 04:45:13,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 275. [2021-06-05 04:45:13,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 274 states have (on average 2.1934306569343067) internal successors, (601), 274 states have internal predecessors, (601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:13,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 601 transitions. [2021-06-05 04:45:13,712 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 601 transitions. Word has length 20 [2021-06-05 04:45:13,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:45:13,712 INFO L482 AbstractCegarLoop]: Abstraction has 275 states and 601 transitions. [2021-06-05 04:45:13,712 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 04:45:13,712 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 601 transitions. [2021-06-05 04:45:13,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:45:13,713 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:45:13,713 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:45:13,913 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4061,874 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:45:13,913 INFO L430 AbstractCegarLoop]: === Iteration 880 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:45:13,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:45:13,913 INFO L82 PathProgramCache]: Analyzing trace with hash 2012042850, now seen corresponding path program 874 times [2021-06-05 04:45:13,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:45:13,913 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060625478] [2021-06-05 04:45:13,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:45:13,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:14,109 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:14,109 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:45:14,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060625478] [2021-06-05 04:45:14,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060625478] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:14,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134204441] [2021-06-05 04:45:14,109 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 875 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 875 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:45:14,134 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:45:14,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:45:14,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:45:14,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:45:14,331 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:14,331 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:14,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:45:14,332 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:14,335 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:14,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:45:14,336 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:14,397 INFO L628 ElimStorePlain]: treesize reduction 88, result has 45.0 percent of original size [2021-06-05 04:45:14,400 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:14,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:45:14,401 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:45:14,425 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:45:14,427 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:14,427 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 19 treesize of output 15 [2021-06-05 04:45:14,428 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:14,450 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:45:14,452 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:14,452 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 10 treesize of output 6 [2021-06-05 04:45:14,454 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:45:14,474 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:45:14,476 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 04:45:14,476 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-06-05 04:45:14,560 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 04:45:14,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1134204441] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:14,561 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:45:14,561 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-06-05 04:45:14,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821305925] [2021-06-05 04:45:14,561 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 04:45:14,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:45:14,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 04:45:14,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=447, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:45:14,561 INFO L87 Difference]: Start difference. First operand 275 states and 601 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:15,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:45:15,226 INFO L93 Difference]: Finished difference Result 361 states and 760 transitions. [2021-06-05 04:45:15,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 04:45:15,226 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 04:45:15,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:45:15,227 INFO L225 Difference]: With dead ends: 361 [2021-06-05 04:45:15,227 INFO L226 Difference]: Without dead ends: 342 [2021-06-05 04:45:15,227 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 728.5ms TimeCoverageRelationStatistics Valid=115, Invalid=877, Unknown=0, NotChecked=0, Total=992 [2021-06-05 04:45:15,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2021-06-05 04:45:15,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 274. [2021-06-05 04:45:15,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 273 states have (on average 2.1941391941391943) internal successors, (599), 273 states have internal predecessors, (599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:15,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 599 transitions. [2021-06-05 04:45:15,229 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 599 transitions. Word has length 20 [2021-06-05 04:45:15,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:45:15,229 INFO L482 AbstractCegarLoop]: Abstraction has 274 states and 599 transitions. [2021-06-05 04:45:15,229 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 04:45:15,229 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 599 transitions. [2021-06-05 04:45:15,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:45:15,230 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:45:15,230 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:45:15,430 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 875 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4066 [2021-06-05 04:45:15,430 INFO L430 AbstractCegarLoop]: === Iteration 881 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:45:15,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:45:15,430 INFO L82 PathProgramCache]: Analyzing trace with hash 871020970, now seen corresponding path program 875 times [2021-06-05 04:45:15,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:45:15,430 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627556012] [2021-06-05 04:45:15,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:45:15,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:15,624 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 04:45:15,624 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:45:15,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627556012] [2021-06-05 04:45:15,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627556012] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:15,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36149739] [2021-06-05 04:45:15,624 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 876 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 876 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:45:15,650 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 04:45:15,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:45:15,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:45:15,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:45:15,791 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:15,792 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:15,792 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 27 treesize of output 21 [2021-06-05 04:45:15,793 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:15,795 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:15,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 04:45:15,796 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:15,818 INFO L628 ElimStorePlain]: treesize reduction 42, result has 39.1 percent of original size [2021-06-05 04:45:15,819 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:15,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:45:15,821 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:45:15,828 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:45:15,828 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 04:45:15,828 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-06-05 04:45:15,866 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 04:45:15,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [36149739] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:15,866 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:45:15,866 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 22 [2021-06-05 04:45:15,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293988185] [2021-06-05 04:45:15,867 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 04:45:15,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:45:15,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 04:45:15,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:45:15,867 INFO L87 Difference]: Start difference. First operand 274 states and 599 transitions. Second operand has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:16,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:45:16,392 INFO L93 Difference]: Finished difference Result 315 states and 675 transitions. [2021-06-05 04:45:16,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 04:45:16,392 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:45:16,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:45:16,393 INFO L225 Difference]: With dead ends: 315 [2021-06-05 04:45:16,393 INFO L226 Difference]: Without dead ends: 302 [2021-06-05 04:45:16,393 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 541.9ms TimeCoverageRelationStatistics Valid=96, Invalid=896, Unknown=0, NotChecked=0, Total=992 [2021-06-05 04:45:16,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2021-06-05 04:45:16,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 279. [2021-06-05 04:45:16,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 278 states have (on average 2.1906474820143886) internal successors, (609), 278 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:16,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 609 transitions. [2021-06-05 04:45:16,395 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 609 transitions. Word has length 20 [2021-06-05 04:45:16,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:45:16,395 INFO L482 AbstractCegarLoop]: Abstraction has 279 states and 609 transitions. [2021-06-05 04:45:16,395 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:16,395 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 609 transitions. [2021-06-05 04:45:16,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:45:16,395 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:45:16,395 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:45:16,596 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4071,876 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:45:16,596 INFO L430 AbstractCegarLoop]: === Iteration 882 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:45:16,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:45:16,596 INFO L82 PathProgramCache]: Analyzing trace with hash 2007206242, now seen corresponding path program 876 times [2021-06-05 04:45:16,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:45:16,596 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604341017] [2021-06-05 04:45:16,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:45:16,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:16,816 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:16,816 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:45:16,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604341017] [2021-06-05 04:45:16,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604341017] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:16,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212156648] [2021-06-05 04:45:16,817 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 877 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 877 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:45:16,843 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 04:45:16,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:45:16,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:45:16,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:45:16,963 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:16,963 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:16,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:45:16,964 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:16,966 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:16,967 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:16,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:45:16,968 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:16,970 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:16,970 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:16,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:45:16,971 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:16,974 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:16,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:45:16,974 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:17,030 INFO L628 ElimStorePlain]: treesize reduction 83, result has 45.8 percent of original size [2021-06-05 04:45:17,033 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:17,033 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:17,033 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 13 treesize of output 9 [2021-06-05 04:45:17,035 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:45:17,037 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:17,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 04:45:17,038 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:45:17,061 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:45:17,062 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:45:17,062 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:173, output treesize:38 [2021-06-05 04:45:17,145 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 04:45:17,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [212156648] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:17,145 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:45:17,145 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-06-05 04:45:17,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517755007] [2021-06-05 04:45:17,145 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 04:45:17,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:45:17,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 04:45:17,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=448, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:45:17,145 INFO L87 Difference]: Start difference. First operand 279 states and 609 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:18,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:45:18,016 INFO L93 Difference]: Finished difference Result 342 states and 715 transitions. [2021-06-05 04:45:18,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 04:45:18,016 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 04:45:18,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:45:18,017 INFO L225 Difference]: With dead ends: 342 [2021-06-05 04:45:18,017 INFO L226 Difference]: Without dead ends: 320 [2021-06-05 04:45:18,017 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 801.8ms TimeCoverageRelationStatistics Valid=119, Invalid=1141, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 04:45:18,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2021-06-05 04:45:18,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 276. [2021-06-05 04:45:18,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 275 states have (on average 2.192727272727273) internal successors, (603), 275 states have internal predecessors, (603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:18,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 603 transitions. [2021-06-05 04:45:18,019 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 603 transitions. Word has length 20 [2021-06-05 04:45:18,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:45:18,019 INFO L482 AbstractCegarLoop]: Abstraction has 276 states and 603 transitions. [2021-06-05 04:45:18,019 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 04:45:18,019 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 603 transitions. [2021-06-05 04:45:18,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:45:18,019 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:45:18,020 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:45:18,220 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4072,877 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:45:18,220 INFO L430 AbstractCegarLoop]: === Iteration 883 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:45:18,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:45:18,220 INFO L82 PathProgramCache]: Analyzing trace with hash -138964518, now seen corresponding path program 877 times [2021-06-05 04:45:18,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:45:18,220 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483738305] [2021-06-05 04:45:18,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:45:18,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:18,445 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:18,445 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:45:18,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483738305] [2021-06-05 04:45:18,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483738305] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:18,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046149627] [2021-06-05 04:45:18,445 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 878 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 878 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:45:18,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:18,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:45:18,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:45:18,611 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:18,612 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:18,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:45:18,613 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:18,616 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:18,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:45:18,616 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:18,677 INFO L628 ElimStorePlain]: treesize reduction 88, result has 45.0 percent of original size [2021-06-05 04:45:18,679 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:18,680 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 10 treesize of output 6 [2021-06-05 04:45:18,681 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:45:18,705 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:45:18,707 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:18,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:45:18,708 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:18,730 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:45:18,732 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:18,733 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 10 treesize of output 6 [2021-06-05 04:45:18,734 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:45:18,756 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:45:18,757 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 04:45:18,757 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-06-05 04:45:18,841 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 04:45:18,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1046149627] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:18,841 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:45:18,841 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-06-05 04:45:18,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554938528] [2021-06-05 04:45:18,841 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 04:45:18,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:45:18,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 04:45:18,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=448, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:45:18,842 INFO L87 Difference]: Start difference. First operand 276 states and 603 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:19,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:45:19,634 INFO L93 Difference]: Finished difference Result 350 states and 738 transitions. [2021-06-05 04:45:19,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 04:45:19,635 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 04:45:19,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:45:19,635 INFO L225 Difference]: With dead ends: 350 [2021-06-05 04:45:19,635 INFO L226 Difference]: Without dead ends: 331 [2021-06-05 04:45:19,635 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 893.7ms TimeCoverageRelationStatistics Valid=146, Invalid=1260, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 04:45:19,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2021-06-05 04:45:19,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 275. [2021-06-05 04:45:19,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 274 states have (on average 2.1934306569343067) internal successors, (601), 274 states have internal predecessors, (601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:19,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 601 transitions. [2021-06-05 04:45:19,637 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 601 transitions. Word has length 20 [2021-06-05 04:45:19,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:45:19,638 INFO L482 AbstractCegarLoop]: Abstraction has 275 states and 601 transitions. [2021-06-05 04:45:19,638 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 04:45:19,638 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 601 transitions. [2021-06-05 04:45:19,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:45:19,638 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:45:19,638 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:45:19,838 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 878 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4075 [2021-06-05 04:45:19,838 INFO L430 AbstractCegarLoop]: === Iteration 884 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:45:19,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:45:19,839 INFO L82 PathProgramCache]: Analyzing trace with hash 2049218658, now seen corresponding path program 878 times [2021-06-05 04:45:19,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:45:19,839 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147333480] [2021-06-05 04:45:19,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:45:19,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:20,059 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:20,059 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:45:20,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147333480] [2021-06-05 04:45:20,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147333480] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:20,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1373224628] [2021-06-05 04:45:20,059 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 879 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 879 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:45:20,084 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:45:20,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:45:20,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:45:20,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:45:20,258 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:20,259 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:20,259 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 19 treesize of output 15 [2021-06-05 04:45:20,259 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:20,262 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:20,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:45:20,263 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:20,324 INFO L628 ElimStorePlain]: treesize reduction 85, result has 46.9 percent of original size [2021-06-05 04:45:20,327 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:20,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 04:45:20,329 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:45:20,352 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:45:20,355 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:20,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:45:20,356 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:20,378 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:45:20,381 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:20,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 04:45:20,382 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:45:20,403 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:45:20,404 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 04:45:20,404 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-06-05 04:45:20,489 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 04:45:20,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1373224628] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:20,489 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:45:20,489 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-06-05 04:45:20,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864618649] [2021-06-05 04:45:20,489 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 04:45:20,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:45:20,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 04:45:20,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=448, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:45:20,490 INFO L87 Difference]: Start difference. First operand 275 states and 601 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:21,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:45:21,507 INFO L93 Difference]: Finished difference Result 400 states and 827 transitions. [2021-06-05 04:45:21,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 04:45:21,508 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 04:45:21,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:45:21,508 INFO L225 Difference]: With dead ends: 400 [2021-06-05 04:45:21,508 INFO L226 Difference]: Without dead ends: 367 [2021-06-05 04:45:21,508 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 1036.3ms TimeCoverageRelationStatistics Valid=151, Invalid=1181, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 04:45:21,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2021-06-05 04:45:21,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 274. [2021-06-05 04:45:21,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 273 states have (on average 2.1941391941391943) internal successors, (599), 273 states have internal predecessors, (599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:21,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 599 transitions. [2021-06-05 04:45:21,511 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 599 transitions. Word has length 20 [2021-06-05 04:45:21,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:45:21,511 INFO L482 AbstractCegarLoop]: Abstraction has 274 states and 599 transitions. [2021-06-05 04:45:21,511 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 04:45:21,511 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 599 transitions. [2021-06-05 04:45:21,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:45:21,511 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:45:21,511 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:45:21,712 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4080,879 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:45:21,712 INFO L430 AbstractCegarLoop]: === Iteration 885 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:45:21,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:45:21,712 INFO L82 PathProgramCache]: Analyzing trace with hash 1163420378, now seen corresponding path program 879 times [2021-06-05 04:45:21,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:45:21,712 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907726439] [2021-06-05 04:45:21,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:45:21,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:21,950 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:21,950 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:45:21,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907726439] [2021-06-05 04:45:21,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907726439] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:21,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968252627] [2021-06-05 04:45:21,950 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 880 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 880 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:45:21,976 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:45:21,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:45:21,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 04:45:21,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:45:22,175 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:22,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:45:22,176 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:22,197 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:45:22,200 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:22,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:45:22,201 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:22,221 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:45:22,223 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:22,223 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 10 treesize of output 6 [2021-06-05 04:45:22,224 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:45:22,250 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:45:22,252 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:22,253 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 10 treesize of output 6 [2021-06-05 04:45:22,254 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:45:22,273 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:45:22,274 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:45:22,274 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:77, output treesize:35 [2021-06-05 04:45:22,369 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 04:45:22,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1968252627] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:22,369 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:45:22,369 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-06-05 04:45:22,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378567920] [2021-06-05 04:45:22,369 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 04:45:22,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:45:22,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 04:45:22,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:45:22,369 INFO L87 Difference]: Start difference. First operand 274 states and 599 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:22,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:45:22,817 INFO L93 Difference]: Finished difference Result 316 states and 674 transitions. [2021-06-05 04:45:22,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:45:22,817 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 04:45:22,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:45:22,817 INFO L225 Difference]: With dead ends: 316 [2021-06-05 04:45:22,817 INFO L226 Difference]: Without dead ends: 302 [2021-06-05 04:45:22,817 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 590.6ms TimeCoverageRelationStatistics Valid=81, Invalid=621, Unknown=0, NotChecked=0, Total=702 [2021-06-05 04:45:22,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2021-06-05 04:45:22,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 275. [2021-06-05 04:45:22,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 274 states have (on average 2.197080291970803) internal successors, (602), 274 states have internal predecessors, (602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:22,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 602 transitions. [2021-06-05 04:45:22,820 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 602 transitions. Word has length 20 [2021-06-05 04:45:22,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:45:22,820 INFO L482 AbstractCegarLoop]: Abstraction has 275 states and 602 transitions. [2021-06-05 04:45:22,820 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 04:45:22,820 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 602 transitions. [2021-06-05 04:45:22,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:45:22,820 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:45:22,820 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:45:23,020 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4085,880 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:45:23,020 INFO L430 AbstractCegarLoop]: === Iteration 886 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:45:23,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:45:23,021 INFO L82 PathProgramCache]: Analyzing trace with hash -526522526, now seen corresponding path program 880 times [2021-06-05 04:45:23,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:45:23,021 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044512326] [2021-06-05 04:45:23,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:45:23,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:23,234 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 04:45:23,234 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:45:23,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044512326] [2021-06-05 04:45:23,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044512326] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:23,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142056042] [2021-06-05 04:45:23,234 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 881 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 881 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:45:23,259 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:45:23,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:45:23,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:45:23,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:45:23,492 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:23,493 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:23,493 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 19 treesize of output 15 [2021-06-05 04:45:23,493 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:23,496 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:23,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:45:23,497 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:23,565 INFO L628 ElimStorePlain]: treesize reduction 85, result has 45.9 percent of original size [2021-06-05 04:45:23,567 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:23,568 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 10 treesize of output 6 [2021-06-05 04:45:23,569 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:45:23,593 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:45:23,595 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:23,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:45:23,596 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:23,619 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:45:23,621 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:23,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:45:23,623 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:45:23,643 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:45:23,644 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 04:45:23,644 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-06-05 04:45:23,727 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 04:45:23,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [142056042] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:23,728 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:45:23,728 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 22 [2021-06-05 04:45:23,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064835807] [2021-06-05 04:45:23,728 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 04:45:23,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:45:23,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 04:45:23,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:45:23,728 INFO L87 Difference]: Start difference. First operand 275 states and 602 transitions. Second operand has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:24,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:45:24,205 INFO L93 Difference]: Finished difference Result 340 states and 719 transitions. [2021-06-05 04:45:24,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 04:45:24,205 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:45:24,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:45:24,206 INFO L225 Difference]: With dead ends: 340 [2021-06-05 04:45:24,206 INFO L226 Difference]: Without dead ends: 321 [2021-06-05 04:45:24,206 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 582.0ms TimeCoverageRelationStatistics Valid=84, Invalid=618, Unknown=0, NotChecked=0, Total=702 [2021-06-05 04:45:24,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2021-06-05 04:45:24,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 275. [2021-06-05 04:45:24,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 274 states have (on average 2.197080291970803) internal successors, (602), 274 states have internal predecessors, (602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:24,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 602 transitions. [2021-06-05 04:45:24,208 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 602 transitions. Word has length 20 [2021-06-05 04:45:24,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:45:24,208 INFO L482 AbstractCegarLoop]: Abstraction has 275 states and 602 transitions. [2021-06-05 04:45:24,208 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:24,208 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 602 transitions. [2021-06-05 04:45:24,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:45:24,208 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:45:24,208 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:45:24,409 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 881 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4092 [2021-06-05 04:45:24,409 INFO L430 AbstractCegarLoop]: === Iteration 887 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:45:24,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:45:24,409 INFO L82 PathProgramCache]: Analyzing trace with hash 64781686, now seen corresponding path program 881 times [2021-06-05 04:45:24,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:45:24,409 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753467732] [2021-06-05 04:45:24,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:45:24,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:24,597 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 04:45:24,598 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:45:24,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753467732] [2021-06-05 04:45:24,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753467732] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:24,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674258858] [2021-06-05 04:45:24,598 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 882 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 882 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:45:24,624 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 04:45:24,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:45:24,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:45:24,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:45:24,753 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:24,753 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:24,753 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 27 treesize of output 21 [2021-06-05 04:45:24,754 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:24,756 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:24,756 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 27 treesize of output 21 [2021-06-05 04:45:24,757 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:24,780 INFO L628 ElimStorePlain]: treesize reduction 42, result has 44.0 percent of original size [2021-06-05 04:45:24,781 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:24,782 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 21 treesize of output 13 [2021-06-05 04:45:24,782 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:24,789 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:45:24,790 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 04:45:24,790 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-06-05 04:45:24,827 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:24,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [674258858] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:24,828 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:45:24,828 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 21 [2021-06-05 04:45:24,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595532637] [2021-06-05 04:45:24,828 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 04:45:24,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:45:24,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 04:45:24,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:45:24,828 INFO L87 Difference]: Start difference. First operand 275 states and 602 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:25,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:45:25,377 INFO L93 Difference]: Finished difference Result 313 states and 670 transitions. [2021-06-05 04:45:25,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 04:45:25,377 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 04:45:25,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:45:25,377 INFO L225 Difference]: With dead ends: 313 [2021-06-05 04:45:25,377 INFO L226 Difference]: Without dead ends: 300 [2021-06-05 04:45:25,377 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 533.9ms TimeCoverageRelationStatistics Valid=101, Invalid=891, Unknown=0, NotChecked=0, Total=992 [2021-06-05 04:45:25,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2021-06-05 04:45:25,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 276. [2021-06-05 04:45:25,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 275 states have (on average 2.1963636363636363) internal successors, (604), 275 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:25,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 604 transitions. [2021-06-05 04:45:25,379 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 604 transitions. Word has length 20 [2021-06-05 04:45:25,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:45:25,380 INFO L482 AbstractCegarLoop]: Abstraction has 276 states and 604 transitions. [2021-06-05 04:45:25,380 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 04:45:25,380 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 604 transitions. [2021-06-05 04:45:25,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:45:25,380 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:45:25,380 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:45:25,580 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4097,882 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:45:25,580 INFO L430 AbstractCegarLoop]: === Iteration 888 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:45:25,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:45:25,581 INFO L82 PathProgramCache]: Analyzing trace with hash 1200966958, now seen corresponding path program 882 times [2021-06-05 04:45:25,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:45:25,581 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542967101] [2021-06-05 04:45:25,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:45:25,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:25,797 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:25,797 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:45:25,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542967101] [2021-06-05 04:45:25,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542967101] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:25,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785212585] [2021-06-05 04:45:25,797 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 883 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 883 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:45:25,823 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 04:45:25,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:45:25,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:45:25,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:45:25,928 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:25,929 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:25,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:45:25,930 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:25,932 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:25,933 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:25,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:45:25,933 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:25,936 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:25,936 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:25,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:45:25,937 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:25,940 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:25,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:45:25,940 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:25,994 INFO L628 ElimStorePlain]: treesize reduction 83, result has 44.7 percent of original size [2021-06-05 04:45:25,996 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:25,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:25,997 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 10 treesize of output 6 [2021-06-05 04:45:25,998 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:45:26,000 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:26,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 04:45:26,001 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:45:26,024 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:45:26,025 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 04:45:26,025 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:173, output treesize:38 [2021-06-05 04:45:26,106 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:26,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1785212585] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:26,107 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:45:26,107 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 22 [2021-06-05 04:45:26,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191000099] [2021-06-05 04:45:26,107 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 04:45:26,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:45:26,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 04:45:26,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=405, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:45:26,107 INFO L87 Difference]: Start difference. First operand 276 states and 604 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:26,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:45:26,971 INFO L93 Difference]: Finished difference Result 337 states and 708 transitions. [2021-06-05 04:45:26,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 04:45:26,972 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 04:45:26,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:45:26,972 INFO L225 Difference]: With dead ends: 337 [2021-06-05 04:45:26,972 INFO L226 Difference]: Without dead ends: 318 [2021-06-05 04:45:26,972 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 828.6ms TimeCoverageRelationStatistics Valid=126, Invalid=1206, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 04:45:26,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2021-06-05 04:45:26,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 275. [2021-06-05 04:45:26,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 274 states have (on average 2.197080291970803) internal successors, (602), 274 states have internal predecessors, (602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:45:26,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 602 transitions. [2021-06-05 04:45:26,975 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 602 transitions. Word has length 20 [2021-06-05 04:45:26,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:45:26,975 INFO L482 AbstractCegarLoop]: Abstraction has 275 states and 602 transitions. [2021-06-05 04:45:26,975 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 04:45:26,975 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 602 transitions. [2021-06-05 04:45:26,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:45:26,975 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:45:26,975 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:45:27,175 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 883 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4098 [2021-06-05 04:45:27,176 INFO L430 AbstractCegarLoop]: === Iteration 889 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:45:27,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:45:27,176 INFO L82 PathProgramCache]: Analyzing trace with hash -945203802, now seen corresponding path program 883 times [2021-06-05 04:45:27,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:45:27,176 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741598042] [2021-06-05 04:45:27,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:45:27,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:27,384 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 04:45:27,384 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:45:27,384 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741598042] [2021-06-05 04:45:27,384 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741598042] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:27,384 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140771781] [2021-06-05 04:45:27,384 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 884 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 884 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:45:27,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:27,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:45:27,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:45:27,531 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:27,532 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:27,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 04:45:27,533 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:45:27,536 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:45:27,536 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 19 treesize of output 15 [2021-06-05 04:45:27,536 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. Received shutdown request... [2021-06-05 04:45:27,576 WARN L222 SmtUtils]: Removed 2 from assertion stack [2021-06-05 04:45:27,776 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4101,884 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:45:27,776 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-05 04:45:27,778 INFO L246 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-05 04:45:27,779 WARN L196 ceAbstractionStarter]: Timeout [2021-06-05 04:45:27,779 INFO L202 PluginConnector]: Adding new model chromosome-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.06 04:45:27 BasicIcfg [2021-06-05 04:45:27,779 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-05 04:45:27,779 INFO L168 Benchmark]: Toolchain (without parser) took 853280.78 ms. Allocated memory was 352.3 MB in the beginning and 522.2 MB in the end (delta: 169.9 MB). Free memory was 332.3 MB in the beginning and 329.4 MB in the end (delta: 2.9 MB). Peak memory consumption was 174.2 MB. Max. memory is 16.0 GB. [2021-06-05 04:45:27,780 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.16 ms. Allocated memory is still 352.3 MB. Free memory is still 333.5 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 04:45:27,780 INFO L168 Benchmark]: Boogie Procedure Inliner took 23.80 ms. Allocated memory is still 352.3 MB. Free memory was 332.2 MB in the beginning and 330.8 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-05 04:45:27,780 INFO L168 Benchmark]: Boogie Preprocessor took 22.20 ms. Allocated memory is still 352.3 MB. Free memory was 330.8 MB in the beginning and 329.8 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 04:45:27,780 INFO L168 Benchmark]: RCFGBuilder took 274.68 ms. Allocated memory is still 352.3 MB. Free memory was 329.7 MB in the beginning and 311.8 MB in the end (delta: 17.9 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.0 GB. [2021-06-05 04:45:27,780 INFO L168 Benchmark]: TraceAbstraction took 852955.02 ms. Allocated memory was 352.3 MB in the beginning and 522.2 MB in the end (delta: 169.9 MB). Free memory was 311.4 MB in the beginning and 329.4 MB in the end (delta: -18.1 MB). Peak memory consumption was 153.2 MB. Max. memory is 16.0 GB. [2021-06-05 04:45:27,780 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 0.16 ms. Allocated memory is still 352.3 MB. Free memory is still 333.5 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 23.80 ms. Allocated memory is still 352.3 MB. Free memory was 332.2 MB in the beginning and 330.8 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 22.20 ms. Allocated memory is still 352.3 MB. Free memory was 330.8 MB in the beginning and 329.8 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 274.68 ms. Allocated memory is still 352.3 MB. Free memory was 329.7 MB in the beginning and 311.8 MB in the end (delta: 17.9 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.0 GB. * TraceAbstraction took 852955.02 ms. Allocated memory was 352.3 MB in the beginning and 522.2 MB in the end (delta: 169.9 MB). Free memory was 311.4 MB in the beginning and 329.4 MB in the end (delta: -18.1 MB). Peak memory consumption was 153.2 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 71]: 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 PartialQuantifierElimination was eliminating quantifiers from formula with 0 quantifier alternations,while SimplifyDDAWithTimeout was simplifying term of DAG size 50 for 38ms.. - TimeoutResultAtElement [Line: 68]: 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 PartialQuantifierElimination was eliminating quantifiers from formula with 0 quantifier alternations,while SimplifyDDAWithTimeout was simplifying term of DAG size 50 for 38ms.. - TimeoutResultAtElement [Line: 76]: 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 PartialQuantifierElimination was eliminating quantifiers from formula with 0 quantifier alternations,while SimplifyDDAWithTimeout was simplifying term of DAG size 50 for 38ms.. - 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: 852824.9ms, OverallIterations: 889, TraceHistogramMax: 5, EmptinessCheckTime: 203.9ms, AutomataDifference: 318458.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 15.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 25566 SDtfs, 27554 SDslu, 195886 SDs, 0 SdLazy, 356480 SolverSat, 11430 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 130082.9ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 31034 GetRequests, 9807 SyntacticMatches, 1031 SemanticMatches, 20196 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89185 ImplicationChecksByTransitivity, 379236.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=285occurred in iteration=835, InterpolantAutomatonStates: 14034, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 1473.1ms AutomataMinimizationTime, 888 MinimizatonAttempts, 23691 StatesRemovedByMinimization, 865 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 3018.6ms SsaConstructionTime, 9595.5ms SatisfiabilityAnalysisTime, 325259.0ms InterpolantComputationTime, 33007 NumberOfCodeBlocks, 33007 NumberOfCodeBlocksAsserted, 3127 NumberOfCheckSat, 31237 ConstructedInterpolants, 1649 QuantifiedInterpolants, 409641 SizeOfPredicates, 5530 NumberOfNonLiveVariables, 72926 ConjunctsInSsa, 21713 ConjunctsInUnsatCore, 1770 InterpolantComputations, 6 PerfectInterpolantSequences, 2318/26651 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